JMS Component

Since Camel 1.0

Both producer and consumer is supported

This component allows messages to be sent to (or consumed from) a JMS Queue or Topic. It uses Spring’s JMS support for declarative transactions, including Spring’s JmsTemplate for sending and a MessageListenerContainer for consuming.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-jms</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

Using ActiveMQ

If you are using Apache ActiveMQ, you should prefer the ActiveMQ component as it has been optimized for ActiveMQ. All of the options and samples on this page are also valid for the ActiveMQ component.

Transacted and caching

See section Transactions and Cache Levels below if you are using transactions with JMS as it can impact performance.

Request/Reply over JMS

Make sure to read the section Request-reply over JMS further below on this page for important notes about request/reply, as Camel offers a number of options to configure for performance, and clustered environments.

URI format

jms:[queue:|topic:]destinationName[?options]

Where destinationName is a JMS queue or topic name. By default, the destinationName is interpreted as a queue name. For example, to connect to the queue, FOO.BAR use:

jms:FOO.BAR

You can include the optional queue: prefix, if you prefer:

jms:queue:FOO.BAR

To connect to a topic, you must include the topic: prefix. For example, to
connect to the topic, Stocks.Prices, use:

jms:topic:Stocks.Prices

You append query options to the URI by using the following format, ?option=value&option=value&…​

Notes

Using ActiveMQ

The JMS component reuses Spring 2’s JmsTemplate for sending messages. This is not ideal for use in a non-J2EE container and typically requires some caching in the JMS provider to avoid poor performance.

If you intend to use Apache ActiveMQ as your message broker, the recommendation is that you do one of the following:

  • Use the ActiveMQ component, which is already optimized to use ActiveMQ efficiently

  • Use the PoolingConnectionFactory in ActiveMQ.

Transactions and Cache Levels

If you are consuming messages and using transactions (transacted=true) then the default settings for cache level can impact performance.

If you are using XA transactions then you cannot cache as it can cause the XA transaction to not work properly.

If you are not using XA, then you should consider caching as it speeds up performance, such as setting cacheLevelName=CACHE_CONSUMER.

The default setting for cacheLevelName is CACHE_AUTO. This default auto detects the mode and sets the cache level accordingly to:

  • CACHE_CONSUMER if transacted=false

  • CACHE_NONE if transacted=true

So you can say the default setting is conservative. Consider using cacheLevelName=CACHE_CONSUMER if you are using non-XA transactions.

Durable Subscriptions

If you wish to use durable topic subscriptions, you need to specify both clientId and durableSubscriptionName. The value of the clientId must be unique and can only be used by a single JMS connection instance in your entire network. You may prefer to use Virtual Topics instead to avoid this limitation. More background on durable messaging here.

Message Header Mapping

When using message headers, the JMS specification states that header names must be valid Java identifiers. So try to name your headers to be valid Java identifiers. One benefit of doing this is that you can then use your headers inside a JMS Selector (whose SQL92 syntax mandates Java identifier syntax for headers).

A simple strategy for mapping header names is used by default. The strategy is to replace any dots and hyphens in the header name as shown below and to reverse the replacement when the header name is restored from a JMS message sent over the wire. What does this mean? No more losing method names to invoke on a bean component, no more losing the filename header for the File Component, and so on.

The current header name strategy for accepting header names in Camel is as follows:

  • Dots are replaced by DOT and the replacement is reversed when Camel consume the message

  • Hyphen is replaced by HYPHEN and the replacement is reversed when Camel consumes the message

Options

You can configure many different properties on the JMS endpoint, which map to properties on the JMSConfiguration object.

Mapping to Spring JMS

Many of these properties map to properties on Spring JMS, which Camel uses for sending and receiving messages. So you can get more information about these properties by consulting the relevant Spring documentation.

Component options

The JMS component supports 84 options, which are listed below.

Name Description Default Type

allowAutoWired ConnectionFactory (advanced)

Whether to auto-discover ConnectionFactory from the registry, if no connection factory has been configured. If only one instance of ConnectionFactory is found then it will be used. This is enabled by default.

false

boolean

allowAutoWired DestinationResolver (advanced)

Whether to auto-discover DestinationResolver from the registry, if no destination resolver has been configured. If only one instance of DestinationResolver is found then it will be used. This is enabled by default.

false

boolean

configuration (advanced)

To use a shared JMS configuration

JmsConfiguration

acceptMessagesWhile Stopping (consumer)

Specifies whether the consumer accept messages while it is stopping. You may consider enabling this option, if you start and stop JMS routes at runtime, while there are still messages enqueued on the queue. If this option is false, and you stop the JMS route, then messages may be rejected, and the JMS broker would have to attempt redeliveries, which yet again may be rejected, and eventually the message may be moved at a dead letter queue on the JMS broker. To avoid this its recommended to enable this option.

false

boolean

allowReplyManagerQuick Stop (consumer)

Whether the DefaultMessageListenerContainer used in the reply managers for request-reply messaging allow the DefaultMessageListenerContainer.runningAllowed flag to quick stop in case JmsConfiguration#isAcceptMessagesWhileStopping is enabled, and org.apache.camel.CamelContext is currently being stopped. This quick stop ability is enabled by default in the regular JMS consumers but to enable for reply managers you must enable this flag.

false

boolean

acknowledgementMode (consumer)

The JMS acknowledgement mode defined as an Integer. Allows you to set vendor-specific extensions to the acknowledgment mode. For the regular modes, it is preferable to use the acknowledgementModeName instead.

int

eagerPoisonBody (consumer)

If eagerLoadingOfProperties is enabled and the JMS message payload (JMS body or JMS properties) (cannot be read/mapped), then set this text as the message body instead so the message can be processed (the cause of the poison are already stored as exception on the Exchange). This can be turned off by setting eagerPoisonBody=false. See also the option eagerLoadingOfProperties.

Poison JMS message due to ${exception.message}

String

eagerLoadingOf Properties (consumer)

Enables eager loading of JMS properties as soon as a message is loaded which generally is inefficient as the JMS properties may not be required but sometimes can catch early any issues with the underlying JMS provider and the use of JMS properties. See also the option eagerLoadingOfBody.

false

boolean

acknowledgementModeName (consumer)

The JMS acknowledgement name, which is one of: SESSION_TRANSACTED, CLIENT_ACKNOWLEDGE, AUTO_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE

AUTO_ACKNOWLEDGE

String

autoStartup (consumer)

Specifies whether the consumer container should auto-startup.

true

boolean

cacheLevel (consumer)

Sets the cache level by ID for the underlying JMS resources. See cacheLevelName option for more details.

int

cacheLevelName (consumer)

Sets the cache level by name for the underlying JMS resources. Possible values are: CACHE_AUTO, CACHE_CONNECTION, CACHE_CONSUMER, CACHE_NONE, and CACHE_SESSION. The default setting is CACHE_AUTO. See the Spring documentation and Transactions Cache Levels for more information.

CACHE_AUTO

String

replyToCacheLevelName (producer)

Sets the cache level by name for the reply consumer when doing request/reply over JMS. This option only applies when using fixed reply queues (not temporary). Camel will by default use: CACHE_CONSUMER for exclusive or shared w/ replyToSelectorName. And CACHE_SESSION for shared without replyToSelectorName. Some JMS brokers such as IBM WebSphere may require to set the replyToCacheLevelName=CACHE_NONE to work. Note: If using temporary queues then CACHE_NONE is not allowed, and you must use a higher value such as CACHE_CONSUMER or CACHE_SESSION.

String

clientId (common)

Sets the JMS client ID to use. Note that this value, if specified, must be unique and can only be used by a single JMS connection instance. It is typically only required for durable topic subscriptions. If using Apache ActiveMQ you may prefer to use Virtual Topics instead.

String

concurrentConsumers (consumer)

Specifies the default number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

1

int

replyToConcurrent Consumers (producer)

Specifies the default number of concurrent consumers when doing request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

1

int

connectionFactory (common)

The connection factory to be use. A connection factory must be configured either on the component or endpoint.

ConnectionFactory

username (security)

Username to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

password (security)

Password to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

deliveryPersistent (producer)

Specifies whether persistent delivery is used by default.

true

boolean

deliveryMode (producer)

Specifies the delivery mode to be used. Possibles values are those defined by javax.jms.DeliveryMode. NON_PERSISTENT = 1 and PERSISTENT = 2.

Integer

durableSubscriptionName (common)

The durable subscriber name for specifying durable topic subscriptions. The clientId option must be configured as well.

String

exceptionListener (advanced)

Specifies the JMS Exception Listener that is to be notified of any underlying JMS exceptions.

ExceptionListener

errorHandler (advanced)

Specifies a org.springframework.util.ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message. By default these exceptions will be logged at the WARN level, if no errorHandler has been configured. You can configure logging level and whether stack traces should be logged using errorHandlerLoggingLevel and errorHandlerLogStackTrace options. This makes it much easier to configure, than having to code a custom errorHandler.

ErrorHandler

errorHandlerLogging Level (logging)

Allows to configure the default errorHandler logging level for logging uncaught exceptions.

WARN

LoggingLevel

errorHandlerLogStack Trace (logging)

Allows to control whether stacktraces should be logged or not, by the default errorHandler.

true

boolean

explicitQosEnabled (producer)

Set if the deliveryMode, priority or timeToLive qualities of service should be used when sending messages. This option is based on Spring’s JmsTemplate. The deliveryMode, priority and timeToLive options are applied to the current endpoint. This contrasts with the preserveMessageQos option, which operates at message granularity, reading QoS properties exclusively from the Camel In message headers.

false

boolean

exposeListenerSession (consumer)

Specifies whether the listener session should be exposed when consuming messages.

false

boolean

idleTaskExecutionLimit (advanced)

Specifies the limit for idle executions of a receive task, not having received any message within its execution. If this limit is reached, the task will shut down and leave receiving to other executing tasks (in the case of dynamic scheduling; see the maxConcurrentConsumers setting). There is additional doc available from Spring.

1

int

idleConsumerLimit (advanced)

Specify the limit for the number of consumers that are allowed to be idle at any given time.

1

int

maxConcurrentConsumers (consumer)

Specifies the maximum number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToMaxConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

int

replyToMaxConcurrent Consumers (producer)

Specifies the maximum number of concurrent consumers when using request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

int

replyOnTimeoutToMax ConcurrentConsumers (producer)

Specifies the maximum number of concurrent consumers for continue routing when timeout occurred when using request/reply over JMS.

1

int

maxMessagesPerTask (advanced)

The number of messages per task. -1 is unlimited. If you use a range for concurrent consumers (eg min max), then this option can be used to set a value to eg 100 to control how fast the consumers will shrink when less work is required.

-1

int

messageConverter (advanced)

To use a custom Spring org.springframework.jms.support.converter.MessageConverter so you can be in control how to map to/from a javax.jms.Message.

MessageConverter

mapJmsMessage (advanced)

Specifies whether Camel should auto map the received JMS message to a suited payload type, such as javax.jms.TextMessage to a String etc. See section about how mapping works below for more details.

true

boolean

messageIdEnabled (advanced)

When sending, specifies whether message IDs should be added. This is just an hint to the JMS Broker. If the JMS provider accepts this hint, these messages must have the message ID set to null; if the provider ignores the hint, the message ID must be set to its normal unique value.

true

boolean

messageTimestampEnabled (advanced)

Specifies whether timestamps should be enabled by default on sending messages. This is just an hint to the JMS broker. If the JMS provider accepts this hint, these messages must have the timestamp set to zero; if the provider ignores the hint the timestamp must be set to its normal value.

true

boolean

alwaysCopyMessage (producer)

If true, Camel will always make a JMS message copy of the message when it is passed to the producer for sending. Copying the message is needed in some situations, such as when a replyToDestinationSelectorName is set (incidentally, Camel will set the alwaysCopyMessage option to true, if a replyToDestinationSelectorName is set).

false

boolean

useMessageIDAs CorrelationID (advanced)

Specifies whether JMSMessageID should always be used as JMSCorrelationID for InOut messages.

false

boolean

priority (producer)

Values greater than 1 specify the message priority when sending (where 0 is the lowest priority and 9 is the highest). The explicitQosEnabled option must also be enabled in order for this option to have any effect.

4

int

pubSubNoLocal (advanced)

Specifies whether to inhibit the delivery of messages published by its own connection.

false

boolean

receiveTimeout (advanced)

The timeout for receiving messages (in milliseconds).

1000

long

recoveryInterval (advanced)

Specifies the interval between recovery attempts, i.e. when a connection is being refreshed, in milliseconds. The default is 5000 ms, that is, 5 seconds.

5000

long

taskExecutor (consumer)

Allows you to specify a custom task executor for consuming messages.

TaskExecutor

timeToLive (producer)

When sending messages, specifies the time-to-live of the message (in milliseconds).

-1

long

transacted (transaction)

Specifies whether to use transacted mode

false

boolean

lazyCreateTransaction Manager (transaction)

If true, Camel will create a JmsTransactionManager, if there is no transactionManager injected when option transacted=true.

true

boolean

transactionManager (transaction)

The Spring transaction manager to use.

PlatformTransactionManager

transactionName (transaction)

The name of the transaction to use.

String

transactionTimeout (transaction)

The timeout value of the transaction (in seconds), if using transacted mode.

-1

int

testConnectionOn Startup (common)

Specifies whether to test the connection on startup. This ensures that when Camel starts that all the JMS consumers have a valid connection to the JMS broker. If a connection cannot be granted then Camel throws an exception on startup. This ensures that Camel is not started with failed connections. The JMS producers is tested as well.

false

boolean

asyncStartListener (advanced)

Whether to startup the JmsConsumer message listener asynchronously, when starting a route. For example if a JmsConsumer cannot get a connection to a remote JMS broker, then it may block while retrying and/or failover. This will cause Camel to block while starting routes. By setting this option to true, you will let routes startup, while the JmsConsumer connects to the JMS broker using a dedicated thread in asynchronous mode. If this option is used, then beware that if the connection could not be established, then an exception is logged at WARN level, and the consumer will not be able to receive messages; You can then restart the route to retry.

false

boolean

asyncStopListener (advanced)

Whether to stop the JmsConsumer message listener asynchronously, when stopping a route.

false

boolean

forceSendOriginal Message (producer)

When using mapJmsMessage=false Camel will create a new JMS message to send to a new JMS destination if you touch the headers (get or set) during the route. Set this option to true to force Camel to send the original JMS message that was received.

false

boolean

requestTimeout (producer)

The timeout for waiting for a reply when using the InOut Exchange Pattern (in milliseconds). The default is 20 seconds. You can include the header CamelJmsRequestTimeout to override this endpoint configured timeout value, and thus have per message individual timeout values. See also the requestTimeoutCheckerInterval option.

20000

long

requestTimeoutChecker Interval (advanced)

Configures how often Camel should check for timed out Exchanges when doing request/reply over JMS. By default Camel checks once per second. But if you must react faster when a timeout occurs, then you can lower this interval, to check more frequently. The timeout is determined by the option requestTimeout.

1000

long

transferExchange (advanced)

You can transfer the exchange over the wire instead of just the body and headers. The following fields are transferred: In body, Out body, Fault body, In headers, Out headers, Fault headers, exchange properties, exchange exception. This requires that the objects are serializable. Camel will exclude any non-serializable objects and log it at WARN level. You must enable this option on both the producer and consumer side, so Camel knows the payloads is an Exchange and not a regular payload.

false

boolean

transferException (advanced)

If enabled and you are using Request Reply messaging (InOut) and an Exchange failed on the consumer side, then the caused Exception will be send back in response as a javax.jms.ObjectMessage. If the client is Camel, the returned Exception is rethrown. This allows you to use Camel JMS as a bridge in your routing - for example, using persistent queues to enable robust routing. Notice that if you also have transferExchange enabled, this option takes precedence. The caught exception is required to be serializable. The original Exception on the consumer side can be wrapped in an outer exception such as org.apache.camel.RuntimeCamelException when returned to the producer. Use this with caution as the data is using Java Object serialization and requires the received to be able to deserialize the data at Class level, which forces a strong coupling between the producers and consumer!

false

boolean

jmsOperations (advanced)

Allows you to use your own implementation of the org.springframework.jms.core.JmsOperations interface. Camel uses JmsTemplate as default. Can be used for testing purpose, but not used much as stated in the spring API docs.

JmsOperations

destinationResolver (advanced)

A pluggable org.springframework.jms.support.destination.DestinationResolver that allows you to use your own resolver (for example, to lookup the real destination in a JNDI registry).

DestinationResolver

replyToType (producer)

Allows for explicitly specifying which kind of strategy to use for replyTo queues when doing request/reply over JMS. Possible values are: Temporary, Shared, or Exclusive. By default Camel will use temporary queues. However if replyTo has been configured, then Shared is used by default. This option allows you to use exclusive queues instead of shared ones. See Camel JMS documentation for more details, and especially the notes about the implications if running in a clustered environment, and the fact that Shared reply queues has lower performance than its alternatives Temporary and Exclusive.

ReplyToType

preserveMessageQos (producer)

Set to true, if you want to send message using the QoS settings specified on the message, instead of the QoS settings on the JMS endpoint. The following three headers are considered JMSPriority, JMSDeliveryMode, and JMSExpiration. You can provide all or only some of them. If not provided, Camel will fall back to use the values from the endpoint instead. So, when using this option, the headers override the values from the endpoint. The explicitQosEnabled option, by contrast, will only use options set on the endpoint, and not values from the message header.

false

boolean

asyncConsumer (consumer)

Whether the JmsConsumer processes the Exchange asynchronously. If enabled then the JmsConsumer may pickup the next message from the JMS queue, while the previous message is being processed asynchronously (by the Asynchronous Routing Engine). This means that messages may be processed not 100% strictly in order. If disabled (as default) then the Exchange is fully processed before the JmsConsumer will pickup the next message from the JMS queue. Note if transacted has been enabled, then asyncConsumer=true does not run asynchronously, as transaction must be executed synchronously (Camel 3.0 may support async transactions).

false

boolean

allowNullBody (producer)

Whether to allow sending messages with no body. If this option is false and the message body is null, then an JMSException is thrown.

true

boolean

includeSentJMS MessageID (producer)

Only applicable when sending to JMS destination using InOnly (eg fire and forget). Enabling this option will enrich the Camel Exchange with the actual JMSMessageID that was used by the JMS client when the message was sent to the JMS destination.

false

boolean

includeAllJMSX Properties (advanced)

Whether to include all JMSXxxx properties when mapping from JMS to Camel Message. Setting this to true will include properties such as JMSXAppID, and JMSXUserID etc. Note: If you are using a custom headerFilterStrategy then this option does not apply.

false

boolean

defaultTaskExecutor Type (consumer)

Specifies what default TaskExecutor type to use in the DefaultMessageListenerContainer, for both consumer endpoints and the ReplyTo consumer of producer endpoints. Possible values: SimpleAsync (uses Spring’s SimpleAsyncTaskExecutor) or ThreadPool (uses Spring’s ThreadPoolTaskExecutor with optimal values - cached threadpool-like). If not set, it defaults to the previous behaviour, which uses a cached thread pool for consumer endpoints and SimpleAsync for reply consumers. The use of ThreadPool is recommended to reduce thread trash in elastic configurations with dynamically increasing and decreasing concurrent consumers.

DefaultTaskExecutorType

jmsKeyFormatStrategy (advanced)

Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification. Camel provides two implementations out of the box: default and passthrough. The default strategy will safely marshal dots and hyphens (. and -). The passthrough strategy leaves the key as is. Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation.

JmsKeyFormatStrategy

allowAdditionalHeaders (producer)

This option is used to allow additional headers which may have values that are invalid according to JMS specification. For example some message systems such as WMQ do this with header names using prefix JMS_IBM_MQMD_ containing values with byte array or other invalid types. You can specify multiple header names separated by comma, and use as suffix for wildcard matching.

String

queueBrowseStrategy (advanced)

To use a custom QueueBrowseStrategy when browsing queues

QueueBrowseStrategy

messageCreatedStrategy (advanced)

To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message.

MessageCreatedStrategy

waitForProvision CorrelationToBeUpdated Counter (advanced)

Number of times to wait for provisional correlation id to be updated to the actual correlation id when doing request/reply over JMS and when the option useMessageIDAsCorrelationID is enabled.

50

int

waitForProvision CorrelationToBeUpdated ThreadSleepingTime (advanced)

Interval in millis to sleep each time while waiting for provisional correlation id to be updated.

100

long

correlationProperty (producer)

Use this JMS property to correlate messages in InOut exchange pattern (request-reply) instead of JMSCorrelationID property. This allows you to exchange messages with systems that do not correlate messages using JMSCorrelationID JMS property. If used JMSCorrelationID will not be used or set by Camel. The value of here named property will be generated if not supplied in the header of the message under the same name.

String

subscriptionDurable (consumer)

Set whether to make the subscription durable. The durable subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a durable subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well.

false

boolean

subscriptionShared (consumer)

Set whether to make the subscription shared. The shared subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a shared subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Note that shared subscriptions may also be durable, so this flag can (and often will) be combined with subscriptionDurable as well. Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well. Requires a JMS 2.0 compatible message broker.

false

boolean

subscriptionName (consumer)

Set the name of a subscription to create. To be applied in case of a topic (pub-sub domain) with a shared or durable subscription. The subscription name needs to be unique within this client’s JMS client id. Default is the class name of the specified message listener. Note: Only 1 concurrent consumer (which is the default of this message listener container) is allowed for each subscription, except for a shared subscription (which requires JMS 2.0).

String

streamMessageType Enabled (producer)

Sets whether StreamMessage type is enabled or not. Message payloads of streaming kind such as files, InputStream, etc will either by sent as BytesMessage or StreamMessage. This option controls which kind will be used. By default BytesMessage is used which enforces the entire message payload to be read into memory. By enabling this option the message payload is read into memory in chunks and each chunk is then written to the StreamMessage until no more data.

false

boolean

formatDateHeadersTo Iso8601 (producer)

Sets whether date headers should be formatted according to the ISO 8601 standard.

false

boolean

headerFilterStrategy (filter)

To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message.

HeaderFilterStrategy

basicPropertyBinding (advanced)

Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

Endpoint options

The JMS endpoint is configured using URI syntax:

jms:destinationType:destinationName

with the following path and query parameters:

Path Parameters (2 parameters):

Name Description Default Type

destinationType

The kind of destination to use

queue

String

destinationName

Required Name of the queue or topic to use as destination

String

Query Parameters (93 parameters):

Name Description Default Type

clientId (common)

Sets the JMS client ID to use. Note that this value, if specified, must be unique and can only be used by a single JMS connection instance. It is typically only required for durable topic subscriptions. If using Apache ActiveMQ you may prefer to use Virtual Topics instead.

String

connectionFactory (common)

Sets the default connection factory to be used if a connection factory is not specified for either setTemplateConnectionFactory(ConnectionFactory) or setListenerConnectionFactory(ConnectionFactory)

ConnectionFactory

disableReplyTo (common)

Specifies whether Camel ignores the JMSReplyTo header in messages. If true, Camel does not send a reply back to the destination specified in the JMSReplyTo header. You can use this option if you want Camel to consume from a route and you do not want Camel to automatically send back a reply message because another component in your code handles the reply message. You can also use this option if you want to use Camel as a proxy between different message brokers and you want to route message from one system to another.

false

boolean

durableSubscriptionName (common)

The durable subscriber name for specifying durable topic subscriptions. The clientId option must be configured as well.

String

jmsMessageType (common)

Allows you to force the use of a specific javax.jms.Message implementation for sending JMS messages. Possible values are: Bytes, Map, Object, Stream, Text. By default, Camel would determine which JMS message type to use from the In body type. This option allows you to specify it.

JmsMessageType

testConnectionOnStartup (common)

Specifies whether to test the connection on startup. This ensures that when Camel starts that all the JMS consumers have a valid connection to the JMS broker. If a connection cannot be granted then Camel throws an exception on startup. This ensures that Camel is not started with failed connections. The JMS producers is tested as well.

false

boolean

acknowledgementModeName (consumer)

The JMS acknowledgement name, which is one of: SESSION_TRANSACTED, CLIENT_ACKNOWLEDGE, AUTO_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE

AUTO_ACKNOWLEDGE

String

asyncConsumer (consumer)

Whether the JmsConsumer processes the Exchange asynchronously. If enabled then the JmsConsumer may pickup the next message from the JMS queue, while the previous message is being processed asynchronously (by the Asynchronous Routing Engine). This means that messages may be processed not 100% strictly in order. If disabled (as default) then the Exchange is fully processed before the JmsConsumer will pickup the next message from the JMS queue. Note if transacted has been enabled, then asyncConsumer=true does not run asynchronously, as transaction must be executed synchronously (Camel 3.0 may support async transactions).

false

boolean

autoStartup (consumer)

Specifies whether the consumer container should auto-startup.

true

boolean

cacheLevel (consumer)

Sets the cache level by ID for the underlying JMS resources. See cacheLevelName option for more details.

int

cacheLevelName (consumer)

Sets the cache level by name for the underlying JMS resources. Possible values are: CACHE_AUTO, CACHE_CONNECTION, CACHE_CONSUMER, CACHE_NONE, and CACHE_SESSION. The default setting is CACHE_AUTO. See the Spring documentation and Transactions Cache Levels for more information.

CACHE_AUTO

String

concurrentConsumers (consumer)

Specifies the default number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

1

int

maxConcurrentConsumers (consumer)

Specifies the maximum number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToMaxConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

int

replyTo (consumer)

Provides an explicit ReplyTo destination, which overrides any incoming value of Message.getJMSReplyTo().

String

replyToDeliveryPersistent (consumer)

Specifies whether to use persistent delivery by default for replies.

true

boolean

selector (consumer)

Sets the JMS selector to use

String

subscriptionDurable (consumer)

Set whether to make the subscription durable. The durable subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a durable subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well.

false

boolean

subscriptionName (consumer)

Set the name of a subscription to create. To be applied in case of a topic (pub-sub domain) with a shared or durable subscription. The subscription name needs to be unique within this client’s JMS client id. Default is the class name of the specified message listener. Note: Only 1 concurrent consumer (which is the default of this message listener container) is allowed for each subscription, except for a shared subscription (which requires JMS 2.0).

String

subscriptionShared (consumer)

Set whether to make the subscription shared. The shared subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a shared subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Note that shared subscriptions may also be durable, so this flag can (and often will) be combined with subscriptionDurable as well. Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well. Requires a JMS 2.0 compatible message broker.

false

boolean

acceptMessagesWhileStopping (consumer)

Specifies whether the consumer accept messages while it is stopping. You may consider enabling this option, if you start and stop JMS routes at runtime, while there are still messages enqueued on the queue. If this option is false, and you stop the JMS route, then messages may be rejected, and the JMS broker would have to attempt redeliveries, which yet again may be rejected, and eventually the message may be moved at a dead letter queue on the JMS broker. To avoid this its recommended to enable this option.

false

boolean

allowReplyManagerQuickStop (consumer)

Whether the DefaultMessageListenerContainer used in the reply managers for request-reply messaging allow the DefaultMessageListenerContainer#runningAllowed() flag to quick stop in case JmsConfiguration#isAcceptMessagesWhileStopping() is enabled, and org.apache.camel.CamelContext is currently being stopped. This quick stop ability is enabled by default in the regular JMS consumers but to enable for reply managers you must enable this flag.

false

boolean

consumerType (consumer)

The consumer type to use, which can be one of: Simple, Default, or Custom. The consumer type determines which Spring JMS listener to use. Default will use org.springframework.jms.listener.DefaultMessageListenerContainer, Simple will use org.springframework.jms.listener.SimpleMessageListenerContainer. When Custom is specified, the MessageListenerContainerFactory defined by the messageListenerContainerFactory option will determine what org.springframework.jms.listener.AbstractMessageListenerContainer to use.

Default

ConsumerType

defaultTaskExecutorType (consumer)

Specifies what default TaskExecutor type to use in the DefaultMessageListenerContainer, for both consumer endpoints and the ReplyTo consumer of producer endpoints. Possible values: SimpleAsync (uses Spring’s SimpleAsyncTaskExecutor) or ThreadPool (uses Spring’s ThreadPoolTaskExecutor with optimal values - cached threadpool-like). If not set, it defaults to the previous behaviour, which uses a cached thread pool for consumer endpoints and SimpleAsync for reply consumers. The use of ThreadPool is recommended to reduce thread trash in elastic configurations with dynamically increasing and decreasing concurrent consumers.

DefaultTaskExecutorType

eagerLoadingOfProperties (consumer)

Enables eager loading of JMS properties and payload as soon as a message is loaded which generally is inefficient as the JMS properties may not be required but sometimes can catch early any issues with the underlying JMS provider and the use of JMS properties. See also the option eagerPoisonBody.

false

boolean

eagerPoisonBody (consumer)

If eagerLoadingOfProperties is enabled and the JMS message payload (JMS body or JMS properties) (cannot be read/mapped), then set this text as the message body instead so the message can be processed (the cause of the poison are already stored as exception on the Exchange). This can be turned off by setting eagerPoisonBody=false. See also the option eagerLoadingOfProperties.

Poison JMS message due to ${exception.message}

String

exceptionHandler (consumer)

To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.

ExceptionHandler

exchangePattern (consumer)

Sets the exchange pattern when the consumer creates an exchange.

ExchangePattern

exposeListenerSession (consumer)

Specifies whether the listener session should be exposed when consuming messages.

false

boolean

replyToSameDestination Allowed (consumer)

Whether a JMS consumer is allowed to send a reply message to the same destination that the consumer is using to consume from. This prevents an endless loop by consuming and sending back the same message to itself.

false

boolean

taskExecutor (consumer)

Allows you to specify a custom task executor for consuming messages.

TaskExecutor

deliveryDelay (producer)

Sets delivery delay to use for send calls for JMS. This option requires JMS 2.0 compliant broker.

-1

long

deliveryMode (producer)

Specifies the delivery mode to be used. Possibles values are those defined by javax.jms.DeliveryMode. NON_PERSISTENT = 1 and PERSISTENT = 2.

Integer

deliveryPersistent (producer)

Specifies whether persistent delivery is used by default.

true

boolean

explicitQosEnabled (producer)

Set if the deliveryMode, priority or timeToLive qualities of service should be used when sending messages. This option is based on Spring’s JmsTemplate. The deliveryMode, priority and timeToLive options are applied to the current endpoint. This contrasts with the preserveMessageQos option, which operates at message granularity, reading QoS properties exclusively from the Camel In message headers.

false

Boolean

formatDateHeadersToIso8601 (producer)

Sets whether date headers should be formatted according to the ISO 8601 standard.

false

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

preserveMessageQos (producer)

Set to true, if you want to send message using the QoS settings specified on the message, instead of the QoS settings on the JMS endpoint. The following three headers are considered JMSPriority, JMSDeliveryMode, and JMSExpiration. You can provide all or only some of them. If not provided, Camel will fall back to use the values from the endpoint instead. So, when using this option, the headers override the values from the endpoint. The explicitQosEnabled option, by contrast, will only use options set on the endpoint, and not values from the message header.

false

boolean

priority (producer)

Values greater than 1 specify the message priority when sending (where 0 is the lowest priority and 9 is the highest). The explicitQosEnabled option must also be enabled in order for this option to have any effect.

4

int

replyToConcurrentConsumers (producer)

Specifies the default number of concurrent consumers when doing request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

1

int

replyToMaxConcurrent Consumers (producer)

Specifies the maximum number of concurrent consumers when using request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

int

replyToOnTimeoutMax ConcurrentConsumers (producer)

Specifies the maximum number of concurrent consumers for continue routing when timeout occurred when using request/reply over JMS.

1

int

replyToOverride (producer)

Provides an explicit ReplyTo destination in the JMS message, which overrides the setting of replyTo. It is useful if you want to forward the message to a remote Queue and receive the reply message from the ReplyTo destination.

String

replyToType (producer)

Allows for explicitly specifying which kind of strategy to use for replyTo queues when doing request/reply over JMS. Possible values are: Temporary, Shared, or Exclusive. By default Camel will use temporary queues. However if replyTo has been configured, then Shared is used by default. This option allows you to use exclusive queues instead of shared ones. See Camel JMS documentation for more details, and especially the notes about the implications if running in a clustered environment, and the fact that Shared reply queues has lower performance than its alternatives Temporary and Exclusive.

ReplyToType

requestTimeout (producer)

The timeout for waiting for a reply when using the InOut Exchange Pattern (in milliseconds). The default is 20 seconds. You can include the header CamelJmsRequestTimeout to override this endpoint configured timeout value, and thus have per message individual timeout values. See also the requestTimeoutCheckerInterval option.

20000

long

timeToLive (producer)

When sending messages, specifies the time-to-live of the message (in milliseconds).

-1

long

allowAdditionalHeaders (producer)

This option is used to allow additional headers which may have values that are invalid according to JMS specification. For example some message systems such as WMQ do this with header names using prefix JMS_IBM_MQMD_ containing values with byte array or other invalid types. You can specify multiple header names separated by comma, and use as suffix for wildcard matching.

String

allowNullBody (producer)

Whether to allow sending messages with no body. If this option is false and the message body is null, then an JMSException is thrown.

true

boolean

alwaysCopyMessage (producer)

If true, Camel will always make a JMS message copy of the message when it is passed to the producer for sending. Copying the message is needed in some situations, such as when a replyToDestinationSelectorName is set (incidentally, Camel will set the alwaysCopyMessage option to true, if a replyToDestinationSelectorName is set)

false

boolean

correlationProperty (producer)

Use this JMS property to correlate messages in InOut exchange pattern (request-reply) instead of JMSCorrelationID property. This allows you to exchange messages with systems that do not correlate messages using JMSCorrelationID JMS property. If used JMSCorrelationID will not be used or set by Camel. The value of here named property will be generated if not supplied in the header of the message under the same name.

String

disableTimeToLive (producer)

Use this option to force disabling time to live. For example when you do request/reply over JMS, then Camel will by default use the requestTimeout value as time to live on the message being sent. The problem is that the sender and receiver systems have to have their clocks synchronized, so they are in sync. This is not always so easy to archive. So you can use disableTimeToLive=true to not set a time to live value on the sent message. Then the message will not expire on the receiver system. See below in section About time to live for more details.

false

boolean

forceSendOriginalMessage (producer)

When using mapJmsMessage=false Camel will create a new JMS message to send to a new JMS destination if you touch the headers (get or set) during the route. Set this option to true to force Camel to send the original JMS message that was received.

false

boolean

includeSentJMSMessageID (producer)

Only applicable when sending to JMS destination using InOnly (eg fire and forget). Enabling this option will enrich the Camel Exchange with the actual JMSMessageID that was used by the JMS client when the message was sent to the JMS destination.

false

boolean

replyToCacheLevelName (producer)

Sets the cache level by name for the reply consumer when doing request/reply over JMS. This option only applies when using fixed reply queues (not temporary). Camel will by default use: CACHE_CONSUMER for exclusive or shared w/ replyToSelectorName. And CACHE_SESSION for shared without replyToSelectorName. Some JMS brokers such as IBM WebSphere may require to set the replyToCacheLevelName=CACHE_NONE to work. Note: If using temporary queues then CACHE_NONE is not allowed, and you must use a higher value such as CACHE_CONSUMER or CACHE_SESSION.

String

replyToDestinationSelector Name (producer)

Sets the JMS Selector using the fixed name to be used so you can filter out your own replies from the others when using a shared queue (that is, if you are not using a temporary reply queue).

String

streamMessageTypeEnabled (producer)

Sets whether StreamMessage type is enabled or not. Message payloads of streaming kind such as files, InputStream, etc will either by sent as BytesMessage or StreamMessage. This option controls which kind will be used. By default BytesMessage is used which enforces the entire message payload to be read into memory. By enabling this option the message payload is read into memory in chunks and each chunk is then written to the StreamMessage until no more data.

false

boolean

allowSerializedHeaders (advanced)

Controls whether or not to include serialized headers. Applies only when isTransferExchange() is true. This requires that the objects are serializable. Camel will exclude any non-serializable objects and log it at WARN level.

false

boolean

asyncStartListener (advanced)

Whether to startup the JmsConsumer message listener asynchronously, when starting a route. For example if a JmsConsumer cannot get a connection to a remote JMS broker, then it may block while retrying and/or failover. This will cause Camel to block while starting routes. By setting this option to true, you will let routes startup, while the JmsConsumer connects to the JMS broker using a dedicated thread in asynchronous mode. If this option is used, then beware that if the connection could not be established, then an exception is logged at WARN level, and the consumer will not be able to receive messages; You can then restart the route to retry.

false

boolean

asyncStopListener (advanced)

Whether to stop the JmsConsumer message listener asynchronously, when stopping a route.

false

boolean

basicPropertyBinding (advanced)

Whether the endpoint should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

destinationResolver (advanced)

A pluggable org.springframework.jms.support.destination.DestinationResolver that allows you to use your own resolver (for example, to lookup the real destination in a JNDI registry).

DestinationResolver

errorHandler (advanced)

Specifies a org.springframework.util.ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message. By default these exceptions will be logged at the WARN level, if no errorHandler has been configured. You can configure logging level and whether stack traces should be logged using errorHandlerLoggingLevel and errorHandlerLogStackTrace options. This makes it much easier to configure, than having to code a custom errorHandler.

ErrorHandler

exceptionListener (advanced)

Specifies the JMS Exception Listener that is to be notified of any underlying JMS exceptions.

ExceptionListener

headerFilterStrategy (advanced)

To use a custom HeaderFilterStrategy to filter header to and from Camel message.

HeaderFilterStrategy

idleConsumerLimit (advanced)

Specify the limit for the number of consumers that are allowed to be idle at any given time.

1

int

idleTaskExecutionLimit (advanced)

Specifies the limit for idle executions of a receive task, not having received any message within its execution. If this limit is reached, the task will shut down and leave receiving to other executing tasks (in the case of dynamic scheduling; see the maxConcurrentConsumers setting). There is additional doc available from Spring.

1

int

includeAllJMSXProperties (advanced)

Whether to include all JMSXxxx properties when mapping from JMS to Camel Message. Setting this to true will include properties such as JMSXAppID, and JMSXUserID etc. Note: If you are using a custom headerFilterStrategy then this option does not apply.

false

boolean

jmsKeyFormatStrategy (advanced)

Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification. Camel provides two implementations out of the box: default and passthrough. The default strategy will safely marshal dots and hyphens (. and -). The passthrough strategy leaves the key as is. Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation.

JmsKeyFormatStrategy

mapJmsMessage (advanced)

Specifies whether Camel should auto map the received JMS message to a suited payload type, such as javax.jms.TextMessage to a String etc.

true

boolean

maxMessagesPerTask (advanced)

The number of messages per task. -1 is unlimited. If you use a range for concurrent consumers (eg min max), then this option can be used to set a value to eg 100 to control how fast the consumers will shrink when less work is required.

-1

int

messageConverter (advanced)

To use a custom Spring org.springframework.jms.support.converter.MessageConverter so you can be in control how to map to/from a javax.jms.Message.

MessageConverter

messageCreatedStrategy (advanced)

To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message.

MessageCreatedStrategy

messageIdEnabled (advanced)

When sending, specifies whether message IDs should be added. This is just an hint to the JMS Broker. If the JMS provider accepts this hint, these messages must have the message ID set to null; if the provider ignores the hint, the message ID must be set to its normal unique value

true

boolean

messageListenerContainer Factory (advanced)

Registry ID of the MessageListenerContainerFactory used to determine what org.springframework.jms.listener.AbstractMessageListenerContainer to use to consume messages. Setting this will automatically set consumerType to Custom.

MessageListenerContainerFactory

messageTimestampEnabled (advanced)

Specifies whether timestamps should be enabled by default on sending messages. This is just an hint to the JMS Broker. If the JMS provider accepts this hint, these messages must have the timestamp set to zero; if the provider ignores the hint, the timestamp must be set to its normal value.

true

boolean

pubSubNoLocal (advanced)

Specifies whether to inhibit the delivery of messages published by its own connection.

false

boolean

receiveTimeout (advanced)

The timeout for receiving messages (in milliseconds).

1000

long

recoveryInterval (advanced)

Specifies the interval between recovery attempts, i.e. when a connection is being refreshed, in milliseconds. The default is 5000 ms, that is, 5 seconds.

5000

long

requestTimeoutChecker Interval (advanced)

Configures how often Camel should check for timed out Exchanges when doing request/reply over JMS. By default Camel checks once per second. But if you must react faster when a timeout occurs, then you can lower this interval, to check more frequently. The timeout is determined by the option requestTimeout.

1000

long

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

transferException (advanced)

If enabled and you are using Request Reply messaging (InOut) and an Exchange failed on the consumer side, then the caused Exception will be send back in response as a javax.jms.ObjectMessage. If the client is Camel, the returned Exception is rethrown. This allows you to use Camel JMS as a bridge in your routing - for example, using persistent queues to enable robust routing. Notice that if you also have transferExchange enabled, this option takes precedence. The caught exception is required to be serializable. The original Exception on the consumer side can be wrapped in an outer exception such as org.apache.camel.RuntimeCamelException when returned to the producer. Use this with caution as the data is using Java Object serialization and requires the received to be able to deserialize the data at Class level, which forces a strong coupling between the producers and consumer!

false

boolean

transferExchange (advanced)

You can transfer the exchange over the wire instead of just the body and headers. The following fields are transferred: In body, Out body, Fault body, In headers, Out headers, Fault headers, exchange properties, exchange exception. This requires that the objects are serializable. Camel will exclude any non-serializable objects and log it at WARN level. You must enable this option on both the producer and consumer side, so Camel knows the payloads is an Exchange and not a regular payload. Use this with caution as the data is using Java Object serialization and requires the received to be able to deserialize the data at Class level, which forces a strong coupling between the producers and consumer having to use compatible Camel versions!

false

boolean

useMessageIDAsCorrelation ID (advanced)

Specifies whether JMSMessageID should always be used as JMSCorrelationID for InOut messages.

false

boolean

waitForProvisionCorrelation ToBeUpdatedCounter (advanced)

Number of times to wait for provisional correlation id to be updated to the actual correlation id when doing request/reply over JMS and when the option useMessageIDAsCorrelationID is enabled.

50

int

waitForProvisionCorrelation ToBeUpdatedThreadSleeping Time (advanced)

Interval in millis to sleep each time while waiting for provisional correlation id to be updated.

100

long

errorHandlerLoggingLevel (logging)

Allows to configure the default errorHandler logging level for logging uncaught exceptions.

WARN

LoggingLevel

errorHandlerLogStackTrace (logging)

Allows to control whether stacktraces should be logged or not, by the default errorHandler.

true

boolean

password (security)

Password to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

username (security)

Username to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

transacted (transaction)

Specifies whether to use transacted mode

false

boolean

lazyCreateTransaction Manager (transaction)

If true, Camel will create a JmsTransactionManager, if there is no transactionManager injected when option transacted=true.

true

boolean

transactionManager (transaction)

The Spring transaction manager to use.

PlatformTransactionManager

transactionName (transaction)

The name of the transaction to use.

String

transactionTimeout (transaction)

The timeout value of the transaction (in seconds), if using transacted mode.

-1

int

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-jms-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 85 options, which are listed below.

Name Description Default Type

camel.component.jms.accept-messages-while-stopping

Specifies whether the consumer accept messages while it is stopping. You may consider enabling this option, if you start and stop JMS routes at runtime, while there are still messages enqueued on the queue. If this option is false, and you stop the JMS route, then messages may be rejected, and the JMS broker would have to attempt redeliveries, which yet again may be rejected, and eventually the message may be moved at a dead letter queue on the JMS broker. To avoid this its recommended to enable this option.

false

Boolean

camel.component.jms.acknowledgement-mode

The JMS acknowledgement mode defined as an Integer. Allows you to set vendor-specific extensions to the acknowledgment mode. For the regular modes, it is preferable to use the acknowledgementModeName instead.

Integer

camel.component.jms.acknowledgement-mode-name

The JMS acknowledgement name, which is one of: SESSION_TRANSACTED, CLIENT_ACKNOWLEDGE, AUTO_ACKNOWLEDGE, DUPS_OK_ACKNOWLEDGE

AUTO_ACKNOWLEDGE

String

camel.component.jms.allow-additional-headers

This option is used to allow additional headers which may have values that are invalid according to JMS specification. For example some message systems such as WMQ do this with header names using prefix JMS_IBM_MQMD_ containing values with byte array or other invalid types. You can specify multiple header names separated by comma, and use as suffix for wildcard matching.

String

camel.component.jms.allow-auto-wired-connection-factory

Whether to auto-discover ConnectionFactory from the registry, if no connection factory has been configured. If only one instance of ConnectionFactory is found then it will be used. This is enabled by default.

false

Boolean

camel.component.jms.allow-auto-wired-destination-resolver

Whether to auto-discover DestinationResolver from the registry, if no destination resolver has been configured. If only one instance of DestinationResolver is found then it will be used. This is enabled by default.

false

Boolean

camel.component.jms.allow-null-body

Whether to allow sending messages with no body. If this option is false and the message body is null, then an JMSException is thrown.

true

Boolean

camel.component.jms.allow-reply-manager-quick-stop

Whether the DefaultMessageListenerContainer used in the reply managers for request-reply messaging allow the DefaultMessageListenerContainer.runningAllowed flag to quick stop in case JmsConfiguration#isAcceptMessagesWhileStopping is enabled, and org.apache.camel.CamelContext is currently being stopped. This quick stop ability is enabled by default in the regular JMS consumers but to enable for reply managers you must enable this flag.

false

Boolean

camel.component.jms.always-copy-message

If true, Camel will always make a JMS message copy of the message when it is passed to the producer for sending. Copying the message is needed in some situations, such as when a replyToDestinationSelectorName is set (incidentally, Camel will set the alwaysCopyMessage option to true, if a replyToDestinationSelectorName is set).

false

Boolean

camel.component.jms.async-consumer

Whether the JmsConsumer processes the Exchange asynchronously. If enabled then the JmsConsumer may pickup the next message from the JMS queue, while the previous message is being processed asynchronously (by the Asynchronous Routing Engine). This means that messages may be processed not 100% strictly in order. If disabled (as default) then the Exchange is fully processed before the JmsConsumer will pickup the next message from the JMS queue. Note if transacted has been enabled, then asyncConsumer=true does not run asynchronously, as transaction must be executed synchronously (Camel 3.0 may support async transactions).

false

Boolean

camel.component.jms.async-start-listener

Whether to startup the JmsConsumer message listener asynchronously, when starting a route. For example if a JmsConsumer cannot get a connection to a remote JMS broker, then it may block while retrying and/or failover. This will cause Camel to block while starting routes. By setting this option to true, you will let routes startup, while the JmsConsumer connects to the JMS broker using a dedicated thread in asynchronous mode. If this option is used, then beware that if the connection could not be established, then an exception is logged at WARN level, and the consumer will not be able to receive messages; You can then restart the route to retry.

false

Boolean

camel.component.jms.async-stop-listener

Whether to stop the JmsConsumer message listener asynchronously, when stopping a route.

false

Boolean

camel.component.jms.auto-startup

Specifies whether the consumer container should auto-startup.

true

Boolean

camel.component.jms.basic-property-binding

Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

Boolean

camel.component.jms.bridge-error-handler

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

Boolean

camel.component.jms.cache-level

Sets the cache level by ID for the underlying JMS resources. See cacheLevelName option for more details.

Integer

camel.component.jms.cache-level-name

Sets the cache level by name for the underlying JMS resources. Possible values are: CACHE_AUTO, CACHE_CONNECTION, CACHE_CONSUMER, CACHE_NONE, and CACHE_SESSION. The default setting is CACHE_AUTO. See the Spring documentation and Transactions Cache Levels for more information.

CACHE_AUTO

String

camel.component.jms.client-id

Sets the JMS client ID to use. Note that this value, if specified, must be unique and can only be used by a single JMS connection instance. It is typically only required for durable topic subscriptions. If using Apache ActiveMQ you may prefer to use Virtual Topics instead.

String

camel.component.jms.concurrent-consumers

Specifies the default number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

1

Integer

camel.component.jms.configuration

To use a shared JMS configuration. The option is a org.apache.camel.component.jms.JmsConfiguration type.

String

camel.component.jms.connection-factory

The connection factory to be use. A connection factory must be configured either on the component or endpoint. The option is a javax.jms.ConnectionFactory type.

String

camel.component.jms.correlation-property

Use this JMS property to correlate messages in InOut exchange pattern (request-reply) instead of JMSCorrelationID property. This allows you to exchange messages with systems that do not correlate messages using JMSCorrelationID JMS property. If used JMSCorrelationID will not be used or set by Camel. The value of here named property will be generated if not supplied in the header of the message under the same name.

String

camel.component.jms.default-task-executor-type

Specifies what default TaskExecutor type to use in the DefaultMessageListenerContainer, for both consumer endpoints and the ReplyTo consumer of producer endpoints. Possible values: SimpleAsync (uses Spring’s SimpleAsyncTaskExecutor) or ThreadPool (uses Spring’s ThreadPoolTaskExecutor with optimal values - cached threadpool-like). If not set, it defaults to the previous behaviour, which uses a cached thread pool for consumer endpoints and SimpleAsync for reply consumers. The use of ThreadPool is recommended to reduce thread trash in elastic configurations with dynamically increasing and decreasing concurrent consumers.

DefaultTaskExecutorType

camel.component.jms.delivery-mode

Specifies the delivery mode to be used. Possibles values are those defined by javax.jms.DeliveryMode. NON_PERSISTENT = 1 and PERSISTENT = 2.

Integer

camel.component.jms.delivery-persistent

Specifies whether persistent delivery is used by default.

true

Boolean

camel.component.jms.destination-resolver

A pluggable org.springframework.jms.support.destination.DestinationResolver that allows you to use your own resolver (for example, to lookup the real destination in a JNDI registry). The option is a org.springframework.jms.support.destination.DestinationResolver type.

String

camel.component.jms.durable-subscription-name

The durable subscriber name for specifying durable topic subscriptions. The clientId option must be configured as well.

String

camel.component.jms.eager-loading-of-properties

Enables eager loading of JMS properties as soon as a message is loaded which generally is inefficient as the JMS properties may not be required but sometimes can catch early any issues with the underlying JMS provider and the use of JMS properties. See also the option eagerLoadingOfBody.

false

Boolean

camel.component.jms.eager-poison-body

If eagerLoadingOfProperties is enabled and the JMS message payload (JMS body or JMS properties) (cannot be read/mapped), then set this text as the message body instead so the message can be processed (the cause of the poison are already stored as exception on the Exchange). This can be turned off by setting eagerPoisonBody=false. See also the option eagerLoadingOfProperties.

Poison JMS message due to ${exception.message}

String

camel.component.jms.enabled

Whether to enable auto configuration of the jms component. This is enabled by default.

Boolean

camel.component.jms.error-handler

Specifies a org.springframework.util.ErrorHandler to be invoked in case of any uncaught exceptions thrown while processing a Message. By default these exceptions will be logged at the WARN level, if no errorHandler has been configured. You can configure logging level and whether stack traces should be logged using errorHandlerLoggingLevel and errorHandlerLogStackTrace options. This makes it much easier to configure, than having to code a custom errorHandler. The option is a org.springframework.util.ErrorHandler type.

String

camel.component.jms.error-handler-log-stack-trace

Allows to control whether stacktraces should be logged or not, by the default errorHandler.

true

Boolean

camel.component.jms.error-handler-logging-level

Allows to configure the default errorHandler logging level for logging uncaught exceptions.

LoggingLevel

camel.component.jms.exception-listener

Specifies the JMS Exception Listener that is to be notified of any underlying JMS exceptions. The option is a javax.jms.ExceptionListener type.

String

camel.component.jms.explicit-qos-enabled

Set if the deliveryMode, priority or timeToLive qualities of service should be used when sending messages. This option is based on Spring’s JmsTemplate. The deliveryMode, priority and timeToLive options are applied to the current endpoint. This contrasts with the preserveMessageQos option, which operates at message granularity, reading QoS properties exclusively from the Camel In message headers.

false

Boolean

camel.component.jms.expose-listener-session

Specifies whether the listener session should be exposed when consuming messages.

false

Boolean

camel.component.jms.force-send-original-message

When using mapJmsMessage=false Camel will create a new JMS message to send to a new JMS destination if you touch the headers (get or set) during the route. Set this option to true to force Camel to send the original JMS message that was received.

false

Boolean

camel.component.jms.format-date-headers-to-iso8601

Sets whether date headers should be formatted according to the ISO 8601 standard.

false

Boolean

camel.component.jms.header-filter-strategy

To use a custom org.apache.camel.spi.HeaderFilterStrategy to filter header to and from Camel message. The option is a org.apache.camel.spi.HeaderFilterStrategy type.

String

camel.component.jms.idle-consumer-limit

Specify the limit for the number of consumers that are allowed to be idle at any given time.

1

Integer

camel.component.jms.idle-task-execution-limit

Specifies the limit for idle executions of a receive task, not having received any message within its execution. If this limit is reached, the task will shut down and leave receiving to other executing tasks (in the case of dynamic scheduling; see the maxConcurrentConsumers setting). There is additional doc available from Spring.

1

Integer

camel.component.jms.include-all-j-m-s-x-properties

Whether to include all JMSXxxx properties when mapping from JMS to Camel Message. Setting this to true will include properties such as JMSXAppID, and JMSXUserID etc. Note: If you are using a custom headerFilterStrategy then this option does not apply.

false

Boolean

camel.component.jms.include-sent-j-m-s-message-i-d

Only applicable when sending to JMS destination using InOnly (eg fire and forget). Enabling this option will enrich the Camel Exchange with the actual JMSMessageID that was used by the JMS client when the message was sent to the JMS destination.

false

Boolean

camel.component.jms.jms-key-format-strategy

Pluggable strategy for encoding and decoding JMS keys so they can be compliant with the JMS specification. Camel provides two implementations out of the box: default and passthrough. The default strategy will safely marshal dots and hyphens (. and -). The passthrough strategy leaves the key as is. Can be used for JMS brokers which do not care whether JMS header keys contain illegal characters. You can provide your own implementation of the org.apache.camel.component.jms.JmsKeyFormatStrategy and refer to it using the # notation. The option is a org.apache.camel.component.jms.JmsKeyFormatStrategy type.

String

camel.component.jms.jms-operations

Allows you to use your own implementation of the org.springframework.jms.core.JmsOperations interface. Camel uses JmsTemplate as default. Can be used for testing purpose, but not used much as stated in the spring API docs. The option is a org.springframework.jms.core.JmsOperations type.

String

camel.component.jms.lazy-create-transaction-manager

If true, Camel will create a JmsTransactionManager, if there is no transactionManager injected when option transacted=true.

true

Boolean

camel.component.jms.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean

camel.component.jms.map-jms-message

Specifies whether Camel should auto map the received JMS message to a suited payload type, such as javax.jms.TextMessage to a String etc. See section about how mapping works below for more details.

true

Boolean

camel.component.jms.max-concurrent-consumers

Specifies the maximum number of concurrent consumers when consuming from JMS (not for request/reply over JMS). See also the maxMessagesPerTask option to control dynamic scaling up/down of threads. When doing request/reply over JMS then the option replyToMaxConcurrentConsumers is used to control number of concurrent consumers on the reply message listener.

Integer

camel.component.jms.max-messages-per-task

The number of messages per task. -1 is unlimited. If you use a range for concurrent consumers (eg min max), then this option can be used to set a value to eg 100 to control how fast the consumers will shrink when less work is required.

-1

Integer

camel.component.jms.message-converter

To use a custom Spring org.springframework.jms.support.converter.MessageConverter so you can be in control how to map to/from a javax.jms.Message. The option is a org.springframework.jms.support.converter.MessageConverter type.

String

camel.component.jms.message-created-strategy

To use the given MessageCreatedStrategy which are invoked when Camel creates new instances of javax.jms.Message objects when Camel is sending a JMS message. The option is a org.apache.camel.component.jms.MessageCreatedStrategy type.

String

camel.component.jms.message-id-enabled

When sending, specifies whether message IDs should be added. This is just an hint to the JMS Broker. If the JMS provider accepts this hint, these messages must have the message ID set to null; if the provider ignores the hint, the message ID must be set to its normal unique value.

true

Boolean

camel.component.jms.message-timestamp-enabled

Specifies whether timestamps should be enabled by default on sending messages. This is just an hint to the JMS broker. If the JMS provider accepts this hint, these messages must have the timestamp set to zero; if the provider ignores the hint the timestamp must be set to its normal value.

true

Boolean

camel.component.jms.password

Password to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

camel.component.jms.preserve-message-qos

Set to true, if you want to send message using the QoS settings specified on the message, instead of the QoS settings on the JMS endpoint. The following three headers are considered JMSPriority, JMSDeliveryMode, and JMSExpiration. You can provide all or only some of them. If not provided, Camel will fall back to use the values from the endpoint instead. So, when using this option, the headers override the values from the endpoint. The explicitQosEnabled option, by contrast, will only use options set on the endpoint, and not values from the message header.

false

Boolean

camel.component.jms.priority

Values greater than 1 specify the message priority when sending (where 0 is the lowest priority and 9 is the highest). The explicitQosEnabled option must also be enabled in order for this option to have any effect.

4

Integer

camel.component.jms.pub-sub-no-local

Specifies whether to inhibit the delivery of messages published by its own connection.

false

Boolean

camel.component.jms.queue-browse-strategy

To use a custom QueueBrowseStrategy when browsing queues. The option is a org.apache.camel.component.jms.QueueBrowseStrategy type.

String

camel.component.jms.receive-timeout

The timeout for receiving messages (in milliseconds).

1000

Long

camel.component.jms.recovery-interval

Specifies the interval between recovery attempts, i.e. when a connection is being refreshed, in milliseconds. The default is 5000 ms, that is, 5 seconds.

5000

Long

camel.component.jms.reply-on-timeout-to-max-concurrent-consumers

Specifies the maximum number of concurrent consumers for continue routing when timeout occurred when using request/reply over JMS.

1

Integer

camel.component.jms.reply-to-cache-level-name

Sets the cache level by name for the reply consumer when doing request/reply over JMS. This option only applies when using fixed reply queues (not temporary). Camel will by default use: CACHE_CONSUMER for exclusive or shared w/ replyToSelectorName. And CACHE_SESSION for shared without replyToSelectorName. Some JMS brokers such as IBM WebSphere may require to set the replyToCacheLevelName=CACHE_NONE to work. Note: If using temporary queues then CACHE_NONE is not allowed, and you must use a higher value such as CACHE_CONSUMER or CACHE_SESSION.

String

camel.component.jms.reply-to-concurrent-consumers

Specifies the default number of concurrent consumers when doing request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

1

Integer

camel.component.jms.reply-to-max-concurrent-consumers

Specifies the maximum number of concurrent consumers when using request/reply over JMS. See also the maxMessagesPerTask option to control dynamic scaling up/down of threads.

Integer

camel.component.jms.reply-to-type

Allows for explicitly specifying which kind of strategy to use for replyTo queues when doing request/reply over JMS. Possible values are: Temporary, Shared, or Exclusive. By default Camel will use temporary queues. However if replyTo has been configured, then Shared is used by default. This option allows you to use exclusive queues instead of shared ones. See Camel JMS documentation for more details, and especially the notes about the implications if running in a clustered environment, and the fact that Shared reply queues has lower performance than its alternatives Temporary and Exclusive.

ReplyToType

camel.component.jms.request-timeout

The timeout for waiting for a reply when using the InOut Exchange Pattern (in milliseconds). The default is 20 seconds. You can include the header CamelJmsRequestTimeout to override this endpoint configured timeout value, and thus have per message individual timeout values. See also the requestTimeoutCheckerInterval option.

20000

Long

camel.component.jms.request-timeout-checker-interval

Configures how often Camel should check for timed out Exchanges when doing request/reply over JMS. By default Camel checks once per second. But if you must react faster when a timeout occurs, then you can lower this interval, to check more frequently. The timeout is determined by the option requestTimeout.

1000

Long

camel.component.jms.stream-message-type-enabled

Sets whether StreamMessage type is enabled or not. Message payloads of streaming kind such as files, InputStream, etc will either by sent as BytesMessage or StreamMessage. This option controls which kind will be used. By default BytesMessage is used which enforces the entire message payload to be read into memory. By enabling this option the message payload is read into memory in chunks and each chunk is then written to the StreamMessage until no more data.

false

Boolean

camel.component.jms.subscription-durable

Set whether to make the subscription durable. The durable subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a durable subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well.

false

Boolean

camel.component.jms.subscription-name

Set the name of a subscription to create. To be applied in case of a topic (pub-sub domain) with a shared or durable subscription. The subscription name needs to be unique within this client’s JMS client id. Default is the class name of the specified message listener. Note: Only 1 concurrent consumer (which is the default of this message listener container) is allowed for each subscription, except for a shared subscription (which requires JMS 2.0).

String

camel.component.jms.subscription-shared

Set whether to make the subscription shared. The shared subscription name to be used can be specified through the subscriptionName property. Default is false. Set this to true to register a shared subscription, typically in combination with a subscriptionName value (unless your message listener class name is good enough as subscription name). Note that shared subscriptions may also be durable, so this flag can (and often will) be combined with subscriptionDurable as well. Only makes sense when listening to a topic (pub-sub domain), therefore this method switches the pubSubDomain flag as well. Requires a JMS 2.0 compatible message broker.

false

Boolean

camel.component.jms.task-executor

Allows you to specify a custom task executor for consuming messages. The option is a org.springframework.core.task.TaskExecutor type.

String

camel.component.jms.test-connection-on-startup

Specifies whether to test the connection on startup. This ensures that when Camel starts that all the JMS consumers have a valid connection to the JMS broker. If a connection cannot be granted then Camel throws an exception on startup. This ensures that Camel is not started with failed connections. The JMS producers is tested as well.

false

Boolean

camel.component.jms.time-to-live

When sending messages, specifies the time-to-live of the message (in milliseconds).

-1

Long

camel.component.jms.transacted

Specifies whether to use transacted mode

false

Boolean

camel.component.jms.transaction-manager

The Spring transaction manager to use. The option is a org.springframework.transaction.PlatformTransactionManager type.

String

camel.component.jms.transaction-name

The name of the transaction to use.

String

camel.component.jms.transaction-timeout

The timeout value of the transaction (in seconds), if using transacted mode.

-1

Integer

camel.component.jms.transfer-exception

If enabled and you are using Request Reply messaging (InOut) and an Exchange failed on the consumer side, then the caused Exception will be send back in response as a javax.jms.ObjectMessage. If the client is Camel, the returned Exception is rethrown. This allows you to use Camel JMS as a bridge in your routing - for example, using persistent queues to enable robust routing. Notice that if you also have transferExchange enabled, this option takes precedence. The caught exception is required to be serializable. The original Exception on the consumer side can be wrapped in an outer exception such as org.apache.camel.RuntimeCamelException when returned to the producer. Use this with caution as the data is using Java Object serialization and requires the received to be able to deserialize the data at Class level, which forces a strong coupling between the producers and consumer!

false

Boolean

camel.component.jms.transfer-exchange

You can transfer the exchange over the wire instead of just the body and headers. The following fields are transferred: In body, Out body, Fault body, In headers, Out headers, Fault headers, exchange properties, exchange exception. This requires that the objects are serializable. Camel will exclude any non-serializable objects and log it at WARN level. You must enable this option on both the producer and consumer side, so Camel knows the payloads is an Exchange and not a regular payload.

false

Boolean

camel.component.jms.use-message-i-d-as-correlation-i-d

Specifies whether JMSMessageID should always be used as JMSCorrelationID for InOut messages.

false

Boolean

camel.component.jms.username

Username to use with the ConnectionFactory. You can also configure username/password directly on the ConnectionFactory.

String

camel.component.jms.wait-for-provision-correlation-to-be-updated-counter

Number of times to wait for provisional correlation id to be updated to the actual correlation id when doing request/reply over JMS and when the option useMessageIDAsCorrelationID is enabled.

50

Integer

camel.component.jms.wait-for-provision-correlation-to-be-updated-thread-sleeping-time

Interval in millis to sleep each time while waiting for provisional correlation id to be updated.

100

Long

Samples

JMS is used in many examples for other components as well. But we provide a few samples below to get started.

Receiving from JMS

In the following sample we configure a route that receives JMS messages and routes the message to a POJO:

from("jms:queue:foo").
   to("bean:myBusinessLogic");

You can of course use any of the EIP patterns so the route can be context based. For example, here’s how to filter an order topic for the big spenders:

from("jms:topic:OrdersTopic").
  filter().method("myBean", "isGoldCustomer").
  to("jms:queue:BigSpendersQueue");

Sending to JMS

In the sample below we poll a file folder and send the file content to a JMS topic. As we want the content of the file as a TextMessage instead of a BytesMessage, we need to convert the body to a String:

from("file://orders").
  convertBodyTo(String.class).
  to("jms:topic:OrdersTopic");

Using Annotations

Camel also has annotations so you can use POJO Consuming and POJO Producing.

Spring DSL sample

The preceding examples use the Java DSL. Camel also supports Spring XML DSL. Here is the big spender sample using Spring DSL:

<route>
  <from uri="jms:topic:OrdersTopic"/>
  <filter>
    <method ref="myBean" method="isGoldCustomer"/>
    <to uri="jms:queue:BigSpendersQueue"/>
  </filter>
</route>

Other samples

JMS appears in many of the examples for other components and EIP patterns, as well in this Camel documentation. So feel free to browse the documentation.

Using JMS as a Dead Letter Queue storing Exchange

Normally, when using JMS as the transport, it only transfers the body and headers as the payload. If you want to use JMS with a Dead Letter Channel, using a JMS queue as the Dead Letter Queue, then normally the caused Exception is not stored in the JMS message. You can, however, use the transferExchange option on the JMS dead letter queue to instruct Camel to store the entire Exchange in the queue as a javax.jms.ObjectMessage that holds a org.apache.camel.support.DefaultExchangeHolder. This allows you to consume from the Dead Letter Queue and retrieve the caused exception from the Exchange property with the key Exchange.EXCEPTION_CAUGHT. The demo below illustrates this:

// setup error handler to use JMS as queue and store the entire Exchange
errorHandler(deadLetterChannel("jms:queue:dead?transferExchange=true"));

Then you can consume from the JMS queue and analyze the problem:

from("jms:queue:dead").to("bean:myErrorAnalyzer");

// and in our bean
String body = exchange.getIn().getBody();
Exception cause = exchange.getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class);
// the cause message is
String problem = cause.getMessage();

Using JMS as a Dead Letter Channel storing error only

You can use JMS to store the cause error message or to store a custom body, which you can initialize yourself. The following example uses the Message Translator EIP to do a transformation on the failed exchange before it is moved to the JMS dead letter queue:

// we sent it to a seda dead queue first
errorHandler(deadLetterChannel("seda:dead"));

// and on the seda dead queue we can do the custom transformation before its sent to the JMS queue
from("seda:dead").transform(exceptionMessage()).to("jms:queue:dead");

Here we only store the original cause error message in the transform. You can, however, use any Expression to send whatever you like. For example, you can invoke a method on a Bean or use a custom processor.

Message Mapping between JMS and Camel

Camel automatically maps messages between javax.jms.Message and org.apache.camel.Message.

When sending a JMS message, Camel converts the message body to the following JMS message types:

Body Type JMS Message Comment

String

javax.jms.TextMessage

org.w3c.dom.Node

javax.jms.TextMessage

The DOM will be converted to String.

Map

javax.jms.MapMessage

java.io.Serializable

javax.jms.ObjectMessage

byte[]

javax.jms.BytesMessage

java.io.File

javax.jms.BytesMessage

java.io.Reader

javax.jms.BytesMessage

java.io.InputStream

javax.jms.BytesMessage

java.nio.ByteBuffer

javax.jms.BytesMessage

When receiving a JMS message, Camel converts the JMS message to the following body type:

JMS Message Body Type

javax.jms.TextMessage

String

javax.jms.BytesMessage

byte[]

javax.jms.MapMessage

Map<String, Object>

javax.jms.ObjectMessage

Object

Disabling auto-mapping of JMS messages

You can use the mapJmsMessage option to disable the auto-mapping above. If disabled, Camel will not try to map the received JMS message, but instead uses it directly as the payload. This allows you to avoid the overhead of mapping and let Camel just pass through the JMS message. For instance, it even allows you to route javax.jms.ObjectMessage JMS messages with classes you do not have on the classpath.

Using a custom MessageConverter

You can use the messageConverter option to do the mapping yourself in a Spring org.springframework.jms.support.converter.MessageConverter class.

For example, in the route below we use a custom message converter when sending a message to the JMS order queue:

from("file://inbox/order").to("jms:queue:order?messageConverter=#myMessageConverter");

You can also use a custom message converter when consuming from a JMS destination.

Controlling the mapping strategy selected

You can use the jmsMessageType option on the endpoint URL to force a specific message type for all messages.

In the route below, we poll files from a folder and send them as javax.jms.TextMessage as we have forced the JMS producer endpoint to use text messages:

from("file://inbox/order").to("jms:queue:order?jmsMessageType=Text");

You can also specify the message type to use for each message by setting the header with the key CamelJmsMessageType. For example:

from("file://inbox/order").setHeader("CamelJmsMessageType", JmsMessageType.Text).to("jms:queue:order");

The possible values are defined in the enum class, org.apache.camel.jms.JmsMessageType.

Message format when sending

The exchange that is sent over the JMS wire must conform to the JMS Message spec.

For the exchange.in.header the following rules apply for the header keys:

  • Keys starting with JMS or JMSX are reserved.

  • exchange.in.headers keys must be literals and all be valid Java identifiers (do not use dots in the key name).

  • Camel replaces dots & hyphens and the reverse when when consuming JMS messages:
    . is replaced by DOT and the reverse replacement when Camel consumes the message.
    - is replaced by HYPHEN and the reverse replacement when Camel consumes the message.

  • See also the option jmsKeyFormatStrategy, which allows use of your own custom strategy for formatting keys.

For the exchange.in.header, the following rules apply for the header values:

  • The values must be primitives or their counter objects (such as Integer, Long, Character). The types, String, CharSequence, Date, BigDecimal and BigInteger are all converted to their toString() representation. All other types are dropped.

Camel will log with category org.apache.camel.component.jms.JmsBinding at DEBUG level if it drops a given header value. For example:

2008-07-09 06:43:04,046 [main           ] DEBUG JmsBinding
  - Ignoring non primitive header: order of class: org.apache.camel.component.jms.issues.DummyOrder with value: DummyOrder{orderId=333, itemId=4444, quantity=2}

Message format when receiving

Camel adds the following properties to the Exchange when it receives a message:

Property Type Description

org.apache.camel.jms.replyDestination

javax.jms.Destination

The reply destination.

Camel adds the following JMS properties to the In message headers when it receives a JMS message:

Header Type Description

JMSCorrelationID

String

The JMS correlation ID.

JMSDeliveryMode

int

The JMS delivery mode.

JMSDestination

javax.jms.Destination

The JMS destination.

JMSExpiration

long

The JMS expiration.

JMSMessageID

String

The JMS unique message ID.

JMSPriority

int

The JMS priority (with 0 as the lowest priority and 9 as the highest).

JMSRedelivered

boolean

Is the JMS message redelivered.

JMSReplyTo

javax.jms.Destination

The JMS reply-to destination.

JMSTimestamp

long

The JMS timestamp.

JMSType

String

The JMS type.

JMSXGroupID

String

The JMS group ID.

As all the above information is standard JMS you can check the JMS documentation for further details.

About using Camel to send and receive messages and JMSReplyTo

The JMS component is complex and you have to pay close attention to how it works in some cases. So this is a short summary of some of the areas/pitfalls to look for.

When Camel sends a message using its JMSProducer, it checks the following conditions:

  • The message exchange pattern,

  • Whether a JMSReplyTo was set in the endpoint or in the message headers,

  • Whether any of the following options have been set on the JMS endpoint: disableReplyTo, preserveMessageQos, explicitQosEnabled.

All this can be a tad complex to understand and configure to support your use case.

JmsProducer

The JmsProducer behaves as follows, depending on configuration:

Exchange Pattern Other options Description

InOut

-

Camel will expect a reply, set a temporary JMSReplyTo, and after sending the message, it will start to listen for the reply message on the temporary queue.

InOut

JMSReplyTo is set

Camel will expect a reply and, after sending the message, it will start to listen for the reply message on the specified JMSReplyTo queue.

InOnly

-

Camel will send the message and not expect a reply.

InOnly

JMSReplyTo is set

By default, Camel discards the JMSReplyTo destination and clears the JMSReplyTo header before sending the message. Camel then sends the message and does not expect a reply. Camel logs this in the log at WARN level (changed to DEBUG level from Camel 2.6 onwards. You can use preserveMessageQuo=true to instruct Camel to keep the JMSReplyTo. In all situations the JmsProducer does not expect any reply and thus continue after sending the message.

JmsConsumer

The JmsConsumer behaves as follows, depending on configuration:

Exchange Pattern Other options Description

InOut

-

Camel will send the reply back to the JMSReplyTo queue.

InOnly

-

Camel will not send a reply back, as the pattern is InOnly.

-

disableReplyTo=true

This option suppresses replies.

So pay attention to the message exchange pattern set on your exchanges.

If you send a message to a JMS destination in the middle of your route you can specify the exchange pattern to use, see more at Request Reply.
This is useful if you want to send an InOnly message to a JMS topic:

from("activemq:queue:in")
   .to("bean:validateOrder")
   .to(ExchangePattern.InOnly, "activemq:topic:order")
   .to("bean:handleOrder");

Reuse endpoint and send to different destinations computed at runtime

If you need to send messages to a lot of different JMS destinations, it makes sense to reuse a JMS endpoint and specify the real destination in a message header. This allows Camel to reuse the same endpoint, but send to different destinations. This greatly reduces the number of endpoints created and economizes on memory and thread resources.

You can specify the destination in the following headers:

Header Type Description

CamelJmsDestination

javax.jms.Destination

A destination object.

CamelJmsDestinationName

String

The destination name.

For example, the following route shows how you can compute a destination at run time and use it to override the destination appearing in the JMS URL:

from("file://inbox")
  .to("bean:computeDestination")
  .to("activemq:queue:dummy");

The queue name, dummy, is just a placeholder. It must be provided as part of the JMS endpoint URL, but it will be ignored in this example.

In the computeDestination bean, specify the real destination by setting the CamelJmsDestinationName header as follows:

public void setJmsHeader(Exchange exchange) {
   String id = ....
   exchange.getIn().setHeader("CamelJmsDestinationName", "order:" + id");
}

Then Camel will read this header and use it as the destination instead of the one configured on the endpoint. So, in this example Camel sends the message to activemq:queue:order:2, assuming the id value was 2.

If both the CamelJmsDestination and the CamelJmsDestinationName headers are set, CamelJmsDestination takes priority. Keep in mind that the JMS producer removes both CamelJmsDestination and CamelJmsDestinationName headers from the exchange and do not propagate them to the created JMS message in order to avoid the accidental loops in the routes (in scenarios when the message will be forwarded to the another JMS endpoint).

Configuring different JMS providers

You can configure your JMS provider in Spring XML as follows:

Basically, you can configure as many JMS component instances as you wish and give them a unique name using the id attribute. The preceding example configures an activemq component. You could do the same to configure MQSeries, TibCo, BEA, Sonic and so on.

Once you have a named JMS component, you can then refer to endpoints within that component using URIs. For example for the component name, activemq, you can then refer to destinations using the URI format, activemq:[queue:|topic:]destinationName. You can use the same approach for all other JMS providers.

This works by the SpringCamelContext lazily fetching components from the spring context for the scheme name you use for Endpoint URIs and having the Component resolve the endpoint URIs.

Using JNDI to find the ConnectionFactory

If you are using a J2EE container, you might need to look up JNDI to find the JMS ConnectionFactory rather than use the usual <bean> mechanism in Spring. You can do this using Spring’s factory bean or the new Spring XML namespace. For example:

<bean id="weblogic" class="org.apache.camel.component.jms.JmsComponent">
  <property name="connectionFactory" ref="myConnectionFactory"/>
</bean>

<jee:jndi-lookup id="myConnectionFactory" jndi-name="jms/connectionFactory"/>

See The jee schema in the Spring reference documentation for more details about JNDI lookup.

Concurrent Consuming

A common requirement with JMS is to consume messages concurrently in multiple threads in order to make an application more responsive. You can set the concurrentConsumers option to specify the number of threads servicing the JMS endpoint, as follows:

from("jms:SomeQueue?concurrentConsumers=20").
  bean(MyClass.class);

You can configure this option in one of the following ways:

  • On the JmsComponent,

  • On the endpoint URI or,

  • By invoking setConcurrentConsumers() directly on the JmsEndpoint.

Concurrent Consuming with async consumer

Notice that each concurrent consumer will only pickup the next available message from the JMS broker, when the current message has been fully processed. You can set the option asyncConsumer=true to let the consumer pickup the next message from the JMS queue, while the previous message is being processed asynchronously (by the Asynchronous Routing Engine). See more details in the table on top of the page about the asyncConsumer option.

from("jms:SomeQueue?concurrentConsumers=20&asyncConsumer=true").
  bean(MyClass.class);

Request-reply over JMS

Camel supports Request Reply over JMS. In essence the MEP of the Exchange should be InOut when you send a message to a JMS queue.

Camel offers a number of options to configure request/reply over JMS that influence performance and clustered environments. The table below summaries the options.

Option Performance Cluster Description

Temporary

Fast

Yes

A temporary queue is used as reply queue, and automatic created by Camel. To use this do not specify a replyTo queue name. And you can optionally configure replyToType=Temporary to make it stand out that temporary queues are in use.

Shared

Slow

Yes

A shared persistent queue is used as reply queue. The queue must be created beforehand, although some brokers can create them on the fly such as Apache ActiveMQ. To use this you must specify the replyTo queue name. And you can optionally configure replyToType=Shared to make it stand out that shared queues are in use. A shared queue can be used in a clustered environment with multiple nodes running this Camel application at the same time. All using the same shared reply queue. This is possible because JMS Message selectors are used to correlate expected reply messages; this impacts performance though. JMS Message selectors is slower, and therefore not as fast as Temporary or Exclusive queues. See further below how to tweak this for better performance.

Exclusive

Fast

No (*Yes)

An exclusive persistent queue is used as reply queue. The queue must be created beforehand, although some brokers can create them on the fly such as Apache ActiveMQ. To use this you must specify the replyTo queue name. And you must configure replyToType=Exclusive to instruct Camel to use exclusive queues, as Shared is used by default, if a replyTo queue name was configured. When using exclusive reply queues, then JMS Message selectors are not in use, and therefore other applications must not use this queue as well. An exclusive queue cannot be used in a clustered environment with multiple nodes running this Camel application at the same time; as we do not have control if the reply queue comes back to the same node that sent the request message; that is why shared queues use JMS Message selectors to make sure of this. Though if you configure each Exclusive reply queue with an unique name per node, then you can run this in a clustered environment. As then the reply message will be sent back to that queue for the given node, that awaits the reply message.

concurrentConsumers

Fast

Yes

Allows to process reply messages concurrently using concurrent message listeners in use. You can specify a range using the concurrentConsumers and maxConcurrentConsumers options. Notice: That using Shared reply queues may not work as well with concurrent listeners, so use this option with care.

maxConcurrentConsumers

Fast

Yes

Allows to process reply messages concurrently using concurrent message listeners in use. You can specify a range using the concurrentConsumers and maxConcurrentConsumers options. Notice: That using Shared reply queues may not work as well with concurrent listeners, so use this option with care.

The JmsProducer detects the InOut and provides a JMSReplyTo header with the reply destination to be used. By default Camel uses a temporary queue, but you can use the replyTo option on the endpoint to specify a fixed reply queue (see more below about fixed reply queue).

Camel will automatically setup a consumer which listen on the reply queue, so you should not do anything.
This consumer is a Spring DefaultMessageListenerContainer which listen for replies. However it’s fixed to 1 concurrent consumer.
That means replies will be processed in sequence as there are only 1 thread to process the replies. You can configure the listener to use concurrent threads using the concurrentConsumers and maxConcurrentConsumers options. This allows you to easier configure this in Camel as shown below:

from(xxx)
.inOut().to("activemq:queue:foo?concurrentConsumers=5")
.to(yyy)
.to(zzz);

In this route we instruct Camel to route replies asynchronously using a thread pool with 5 threads.

Request-reply over JMS and using a shared fixed reply queue

If you use a fixed reply queue when doing Request Reply over JMS as shown in the example below, then pay attention.

from(xxx)
.inOut().to("activemq:queue:foo?replyTo=bar")
.to(yyy)

In this example the fixed reply queue named "bar" is used. By default Camel assumes the queue is shared when using fixed reply queues, and therefore it uses a JMSSelector to only pickup the expected reply messages (eg based on the JMSCorrelationID). See next section for exclusive fixed reply queues. That means its not as fast as temporary queues. You can speedup how often Camel will pull for reply messages using the receiveTimeout option. By default its 1000 millis. So to make it faster you can set it to 250 millis to pull 4 times per second as shown:

from(xxx)
.inOut().to("activemq:queue:foo?replyTo=bar&receiveTimeout=250")
.to(yyy)

Notice this will cause the Camel to send pull requests to the message broker more frequent, and thus require more network traffic.
It is generally recommended to use temporary queues if possible.

Request-reply over JMS and using an exclusive fixed reply queue

Since Camel 2.9

In the previous example, Camel would anticipate the fixed reply queue named "bar" was shared, and thus it uses a JMSSelector to only consume reply messages which it expects. However there is a drawback doing this as the JMS selector is slower. Also the consumer on the reply queue is slower to update with new JMS selector ids. In fact it only updates when the receiveTimeout option times out, which by default is 1 second. So in theory the reply messages could take up till about 1 sec to be detected. On the other hand if the fixed reply queue is exclusive to the Camel reply consumer, then we can avoid using the JMS selectors, and thus be more performant. In fact as fast as using temporary queues. There is the ReplyToType option which you can configure to Exclusive
to tell Camel that the reply queue is exclusive as shown in the example below:

from(xxx)
.inOut().to("activemq:queue:foo?replyTo=bar&replyToType=Exclusive")
.to(yyy)

Mind that the queue must be exclusive to each and every endpoint. So if you have two routes, then they each need an unique reply queue as shown in the next example:

from(xxx)
.inOut().to("activemq:queue:foo?replyTo=bar&replyToType=Exclusive")
.to(yyy)

from(aaa)
.inOut().to("activemq:queue:order?replyTo=order.reply&replyToType=Exclusive")
.to(bbb)

The same applies if you run in a clustered environment. Then each node in the cluster must use an unique reply queue name. As otherwise each node in the cluster may pickup messages which was intended as a reply on another node. For clustered environments its recommended to use shared reply queues instead.

Synchronizing clocks between senders and receivers

When doing messaging between systems, its desirable that the systems have synchronized clocks. For example when sending a JMS message, then you can set a time to live value on the message. Then the receiver can inspect this value, and determine if the message is already expired, and thus drop the message instead of consume and process it. However this requires that both sender and receiver have synchronized clocks. If you are using ActiveMQ then you can use the timestamp plugin to synchronize clocks.

About time to live

Read first above about synchronized clocks.

When you do request/reply (InOut) over JMS with Camel then Camel uses a timeout on the sender side, which is default 20 seconds from the requestTimeout option. You can control this by setting a higher/lower value. However the time to live value is still set on the JMS message being send. So that requires the clocks to be synchronized between the systems. If they are not, then you may want to disable the time to live value being set. This is now possible using the disableTimeToLive option from Camel 2.8 onwards. So if you set this option to disableTimeToLive=true, then Camel does not set any time to live value when sending JMS messages. But the request timeout is still active. So for example if you do request/reply over JMS and have disabled time to live, then Camel will still use a timeout by 20 seconds (the requestTimeout option). That option can of course also be configured. So the two options requestTimeout and disableTimeToLive gives you fine grained control when doing request/reply.

You can provide a header in the message to override and use as the request timeout value instead of the endpoint configured value. For example:

   from("direct:someWhere")
     .to("jms:queue:foo?replyTo=bar&requestTimeout=30s")
     .to("bean:processReply");

In the route above we have a endpoint configured requestTimeout of 30 seconds. So Camel will wait up till 30 seconds for that reply message to come back on the bar queue. If no reply message is received then a org.apache.camel.ExchangeTimedOutException is set on the Exchange and Camel continues routing the message, which would then fail due the exception, and Camel’s error handler reacts.

If you want to use a per message timeout value, you can set the header with key org.apache.camel.component.jms.JmsConstants#JMS_REQUEST_TIMEOUT which has constant value "CamelJmsRequestTimeout" with a timeout value as long type.

For example we can use a bean to compute the timeout value per individual message, such as calling the "whatIsTheTimeout" method on the service bean as shown below:

from("direct:someWhere")
  .setHeader("CamelJmsRequestTimeout", method(ServiceBean.class, "whatIsTheTimeout"))
  .to("jms:queue:foo?replyTo=bar&requestTimeout=30s")
  .to("bean:processReply");

When you do fire and forget (InOut) over JMS with Camel then Camel by default does not set any time to live value on the message. You can configure a value by using the timeToLive option. For example to indicate a 5 sec., you set timeToLive=5000. The option disableTimeToLive can be used to force disabling the time to live, also for InOnly messaging. The requestTimeout option is not being used for InOnly messaging.

Enabling Transacted Consumption

A common requirement is to consume from a queue in a transaction and then process the message using the Camel route. To do this, just ensure that you set the following properties on the component/endpoint:

  • transacted = true

  • transactionManager = a Transsaction Manager - typically the JmsTransactionManager

See the Transactional Client EIP pattern for further details.

Transactions and [Request Reply] over JMS

When using Request Reply over JMS you cannot use a single transaction; JMS will not send any messages until a commit is performed, so the server side won’t receive anything at all until the transaction commits. Therefore to use Request Reply you must commit a transaction after sending the request and then use a separate transaction for receiving the response.

To address this issue the JMS component uses different properties to specify transaction use for oneway messaging and request reply messaging:

The transacted property applies only to the InOnly message Exchange Pattern (MEP).

Since Camel 2.10

You can leverage the DMLC transacted session API using the following properties on component/endpoint:

  • transacted = true

  • lazyCreateTransactionManager = false

The benefit of doing so is that the cacheLevel setting will be honored when using local transactions without a configured TransactionManager. When a TransactionManager is configured, no caching happens at DMLC level and it is necessary to rely on a pooled connection factory. For more details about this kind of setup, see here and here.

Using JMSReplyTo for late replies

When using Camel as a JMS listener, it sets an Exchange property with the value of the ReplyTo javax.jms.Destination object, having the key ReplyTo. You can obtain this Destination as follows:

Destination replyDestination = exchange.getIn().getHeader(JmsConstants.JMS_REPLY_DESTINATION, Destination.class);

And then later use it to send a reply using regular JMS or Camel.

// we need to pass in the JMS component, and in this sample we use ActiveMQ
JmsEndpoint endpoint = JmsEndpoint.newInstance(replyDestination, activeMQComponent);
// now we have the endpoint we can use regular Camel API to send a message to it
template.sendBody(endpoint, "Here is the late reply.");

A different solution to sending a reply is to provide the replyDestination object in the same Exchange property when sending. Camel will then pick up this property and use it for the real destination. The endpoint URI must include a dummy destination, however. For example:

// we pretend to send it to some non existing dummy queue
template.send("activemq:queue:dummy, new Processor() {
   public void process(Exchange exchange) throws Exception {
      // and here we override the destination with the ReplyTo destination object so the message is sent to there instead of dummy
      exchange.getIn().setHeader(JmsConstants.JMS_DESTINATION, replyDestination);
      exchange.getIn().setBody("Here is the late reply.");
    }
}

Using a request timeout

In the sample below we send a Request Reply style message Exchange (we use the requestBody method = InOut) to the slow queue for further processing in Camel and we wait for a return reply:

Sending an InOnly message and keeping the JMSReplyTo header

When sending to a JMS destination using camel-jms the producer will use the MEP to detect if its InOnly or InOut messaging. However there can be times where you want to send an InOnly message but keeping the JMSReplyTo header. To do so you have to instruct Camel to keep it, otherwise the JMSReplyTo header will be dropped.

For example to send an InOnly message to the foo queue, but with a JMSReplyTo with bar queue you can do as follows:

template.send("activemq:queue:foo?preserveMessageQos=true", new Processor() {
   public void process(Exchange exchange) throws Exception {
      exchange.getIn().setBody("World");
      exchange.getIn().setHeader("JMSReplyTo", "bar");
    }
});

Notice we use preserveMessageQos=true to instruct Camel to keep the JMSReplyTo header.

Setting JMS provider options on the destination

Some JMS providers, like IBM’s WebSphere MQ need options to be set on the JMS destination. For example, you may need to specify the targetClient option. Since targetClient is a WebSphere MQ option and not a Camel URI option, you need to set that on the JMS destination name like so:

// ...
.setHeader("CamelJmsDestinationName", constant("queue:///MY_QUEUE?targetClient=1"))
.to("wmq:queue:MY_QUEUE?useMessageIDAsCorrelationID=true");

Some versions of WMQ won’t accept this option on the destination name and you will get an exception like:

com.ibm.msg.client.jms.DetailedJMSException: JMSCC0005: The specified
value 'MY_QUEUE?targetClient=1' is not allowed for
'XMSC_DESTINATION_NAME'

A workaround is to use a custom DestinationResolver:

JmsComponent wmq = new JmsComponent(connectionFactory);

wmq.setDestinationResolver(new DestinationResolver() {
    public Destination resolveDestinationName(Session session, String destinationName, boolean pubSubDomain) throws JMSException {
        MQQueueSession wmqSession = (MQQueueSession) session;
        return wmqSession.createQueue("queue:///" + destinationName + "?targetClient=1");
    }
});