AWS Simple Queue Service (SQS)

Since Camel 3.1

Both producer and consumer are supported

The AWS2 SQS component supports sending and receiving messages to Amazon’s SQS service.

Prerequisites

You must have a valid Amazon Web Services developer account, and be signed up to use Amazon SQS. More information is available at Amazon SQS.

URI Format

aws2-sqs://queueNameOrArn[?options]

The queue will be created if they don’t already exists.
You can append query options to the URI in the following format, ?options=value&option2=value&…​

Configuring Options

Camel components are configured on two separate levels:

  • component level

  • endpoint level

Configuring Component Options

The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.

Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.

Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.

Configuring Endpoint Options

Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.

Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL as a type safe way of configuring endpoints.

A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.

The following two sections lists all the options, firstly for the component followed by the endpoint.

Component Options

The AWS Simple Queue Service (SQS) component supports 43 options, which are listed below.

Name Description Default Type

amazonAWSHost (common)

The hostname of the Amazon AWS cloud.

String

amazonSQSClient (common)

Autowired To use the AmazonSQS as client.

SqsClient

autoCreateQueue (common)

Setting the autocreation of the queue.

boolean

configuration (common)

The AWS SQS default configuration.

Sqs2Configuration

overrideEndpoint (common)

Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option.

boolean

protocol (common)

The underlying protocol used to communicate with SQS.

String

proxyProtocol (common)

To define a proxy protocol when instantiating the SQS client.

Enum values:

  • HTTP

  • HTTPS

Protocol

queueOwnerAWSAccountId (common)

Specify the queue owner aws account id when you need to connect the queue with different account owner.

String

region (common)

The region in which SQS client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

String

trustAllCertificates (common)

If we want to trust all certificates in case of overriding the endpoint.

boolean

uriEndpointOverride (common)

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

useDefaultCredentialsProvider (common)

Set whether the SQS client should expect to load credentials on an AWS infra instance or to expect static credentials to be passed in.

boolean

attributeNames (consumer)

A list of attribute names to receive when consuming. Multiple names can be separated by comma.

String

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.

boolean

concurrentConsumers (consumer)

Allows you to use multiple threads to poll the sqs queue to increase throughput.

int

defaultVisibilityTimeout (consumer)

The default visibility timeout (in seconds).

Integer

deleteAfterRead (consumer)

Delete message from SQS after it has been read.

boolean

deleteIfFiltered (consumer)

Whether or not to send the DeleteMessage to the SQS queue if the exchange has property with key Sqs2Constants#SQS_DELETE_FILTERED (CamelAwsSqsDeleteFiltered) set to true.

boolean

extendMessageVisibility (consumer)

If enabled then a scheduled background task will keep extending the message visibility on SQS. This is needed if it takes a long time to process the message. If set to true defaultVisibilityTimeout must be set. See details at Amazon docs.

boolean

kmsDataKeyReusePeriodSeconds (consumer)

The length of time, in seconds, for which Amazon SQS can reuse a data key to encrypt or decrypt messages before calling AWS KMS again. An integer representing seconds, between 60 seconds (1 minute) and 86,400 seconds (24 hours). Default: 300 (5 minutes).

Integer

kmsMasterKeyId (consumer)

The ID of an AWS-managed customer master key (CMK) for Amazon SQS or a custom CMK.

String

messageAttributeNames (consumer)

A list of message attribute names to receive when consuming. Multiple names can be separated by comma.

String

serverSideEncryptionEnabled (consumer)

Define if Server Side Encryption is enabled or not on the queue.

boolean

visibilityTimeout (consumer)

The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request to set in the com.amazonaws.services.sqs.model.SetQueueAttributesRequest. This only make sense if its different from defaultVisibilityTimeout. It changes the queue visibility timeout attribute permanently.

Integer

waitTimeSeconds (consumer)

Duration in seconds (0 to 20) that the ReceiveMessage action call will wait until a message is in the queue to include in the response.

Integer

batchSeparator (producer)

Set the separator when passing a String to send batch message operation.

String

delaySeconds (producer)

Delay sending messages for a number of seconds.

Integer

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.

boolean

messageDeduplicationIdStrategy (producer)

Only for FIFO queues. Strategy for setting the messageDeduplicationId on the message. Can be one of the following options: useExchangeId, useContentBasedDeduplication. For the useContentBasedDeduplication option, no messageDeduplicationId will be set on the message.

Enum values:

  • useExchangeId

  • useContentBasedDeduplication

String

messageGroupIdStrategy (producer)

Only for FIFO queues. Strategy for setting the messageGroupId on the message. Can be one of the following options: useConstant, useExchangeId, usePropertyValue. For the usePropertyValue option, the value of property CamelAwsMessageGroupId will be used.

Enum values:

  • useConstant

  • useExchangeId

  • usePropertyValue

String

operation (producer)

The operation to do in case the user don’t want to send only a message.

Enum values:

  • sendBatchMessage

  • deleteMessage

  • listQueues

  • purgeQueue

  • deleteQueue

Sqs2Operations

autowiredEnabled (advanced)

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

boolean

delayQueue (advanced)

Define if you want to apply delaySeconds option to the queue or on single messages.

boolean

queueUrl (advanced)

To define the queueUrl explicitly. All other parameters, which would influence the queueUrl, are ignored. This parameter is intended to be used, to connect to a mock implementation of SQS, for testing purposes.

String

proxyHost (proxy)

To define a proxy host when instantiating the SQS client.

String

proxyPort (proxy)

To define a proxy port when instantiating the SQS client.

Integer

maximumMessageSize (queue)

The maximumMessageSize (in bytes) an SQS message can contain for this queue.

Integer

messageRetentionPeriod (queue)

The messageRetentionPeriod (in seconds) a message will be retained by SQS for this queue.

Integer

policy (queue)

The policy for this queue. It can be loaded by default from classpath, but you can prefix with classpath:, file:, or http: to load the resource from different systems.

String

receiveMessageWaitTimeSeconds (queue)

If you do not specify WaitTimeSeconds in the request, the queue attribute ReceiveMessageWaitTimeSeconds is used to determine how long to wait.

Integer

redrivePolicy (queue)

Specify the policy that send message to DeadLetter queue. See detail at Amazon docs.

String

accessKey (security)

Amazon AWS Access Key.

String

secretKey (security)

Amazon AWS Secret Key.

String

Endpoint Options

The AWS Simple Queue Service (SQS) endpoint is configured using URI syntax:

aws2-sqs:queueNameOrArn

with the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

queueNameOrArn (common)

Required Queue name or ARN.

String

Query Parameters (61 parameters)

Name Description Default Type

amazonAWSHost (common)

The hostname of the Amazon AWS cloud.

String

amazonSQSClient (common)

Autowired To use the AmazonSQS as client.

SqsClient

autoCreateQueue (common)

Setting the autocreation of the queue.

boolean

headerFilterStrategy (common)

To use a custom HeaderFilterStrategy to map headers to/from Camel.

HeaderFilterStrategy

overrideEndpoint (common)

Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option.

boolean

protocol (common)

The underlying protocol used to communicate with SQS.

String

proxyProtocol (common)

To define a proxy protocol when instantiating the SQS client.

Enum values:

  • HTTP

  • HTTPS

Protocol

queueOwnerAWSAccountId (common)

Specify the queue owner aws account id when you need to connect the queue with different account owner.

String

region (common)

The region in which SQS client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

String

trustAllCertificates (common)

If we want to trust all certificates in case of overriding the endpoint.

boolean

uriEndpointOverride (common)

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

useDefaultCredentialsProvider (common)

Set whether the SQS client should expect to load credentials on an AWS infra instance or to expect static credentials to be passed in.

boolean

attributeNames (consumer)

A list of attribute names to receive when consuming. Multiple names can be separated by comma.

String

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.

boolean

concurrentConsumers (consumer)

Allows you to use multiple threads to poll the sqs queue to increase throughput.

int

defaultVisibilityTimeout (consumer)

The default visibility timeout (in seconds).

Integer

deleteAfterRead (consumer)

Delete message from SQS after it has been read.

boolean

deleteIfFiltered (consumer)

Whether or not to send the DeleteMessage to the SQS queue if the exchange has property with key Sqs2Constants#SQS_DELETE_FILTERED (CamelAwsSqsDeleteFiltered) set to true.

boolean

extendMessageVisibility (consumer)

If enabled then a scheduled background task will keep extending the message visibility on SQS. This is needed if it takes a long time to process the message. If set to true defaultVisibilityTimeout must be set. See details at Amazon docs.

boolean

kmsDataKeyReusePeriodSeconds (consumer)

The length of time, in seconds, for which Amazon SQS can reuse a data key to encrypt or decrypt messages before calling AWS KMS again. An integer representing seconds, between 60 seconds (1 minute) and 86,400 seconds (24 hours). Default: 300 (5 minutes).

Integer

kmsMasterKeyId (consumer)

The ID of an AWS-managed customer master key (CMK) for Amazon SQS or a custom CMK.

String

maxMessagesPerPoll (consumer)

Gets the maximum number of messages as a limit to poll at each polling. Is default unlimited, but use 0 or negative number to disable it as unlimited.

int

messageAttributeNames (consumer)

A list of message attribute names to receive when consuming. Multiple names can be separated by comma.

String

sendEmptyMessageWhenIdle (consumer)

If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead.

boolean

serverSideEncryptionEnabled (consumer)

Define if Server Side Encryption is enabled or not on the queue.

boolean

visibilityTimeout (consumer)

The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request to set in the com.amazonaws.services.sqs.model.SetQueueAttributesRequest. This only make sense if its different from defaultVisibilityTimeout. It changes the queue visibility timeout attribute permanently.

Integer

waitTimeSeconds (consumer)

Duration in seconds (0 to 20) that the ReceiveMessage action call will wait until a message is in the queue to include in the response.

Integer

exceptionHandler (consumer (advanced))

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 (advanced))

Sets the exchange pattern when the consumer creates an exchange.

Enum values:

  • InOnly

  • InOut

  • InOptionalOut

ExchangePattern

pollStrategy (consumer (advanced))

A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel.

PollingConsumerPollStrategy

batchSeparator (producer)

Set the separator when passing a String to send batch message operation.

String

delaySeconds (producer)

Delay sending messages for a number of seconds.

Integer

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.

boolean

messageDeduplicationIdStrategy (producer)

Only for FIFO queues. Strategy for setting the messageDeduplicationId on the message. Can be one of the following options: useExchangeId, useContentBasedDeduplication. For the useContentBasedDeduplication option, no messageDeduplicationId will be set on the message.

Enum values:

  • useExchangeId

  • useContentBasedDeduplication

String

messageGroupIdStrategy (producer)

Only for FIFO queues. Strategy for setting the messageGroupId on the message. Can be one of the following options: useConstant, useExchangeId, usePropertyValue. For the usePropertyValue option, the value of property CamelAwsMessageGroupId will be used.

Enum values:

  • useConstant

  • useExchangeId

  • usePropertyValue

String

operation (producer)

The operation to do in case the user don’t want to send only a message.

Enum values:

  • sendBatchMessage

  • deleteMessage

  • listQueues

  • purgeQueue

  • deleteQueue

Sqs2Operations

delayQueue (advanced)

Define if you want to apply delaySeconds option to the queue or on single messages.

boolean

queueUrl (advanced)

To define the queueUrl explicitly. All other parameters, which would influence the queueUrl, are ignored. This parameter is intended to be used, to connect to a mock implementation of SQS, for testing purposes.

String

proxyHost (proxy)

To define a proxy host when instantiating the SQS client.

String

proxyPort (proxy)

To define a proxy port when instantiating the SQS client.

Integer

maximumMessageSize (queue)

The maximumMessageSize (in bytes) an SQS message can contain for this queue.

Integer

messageRetentionPeriod (queue)

The messageRetentionPeriod (in seconds) a message will be retained by SQS for this queue.

Integer

policy (queue)

The policy for this queue. It can be loaded by default from classpath, but you can prefix with classpath:, file:, or http: to load the resource from different systems.

String

receiveMessageWaitTimeSeconds (queue)

If you do not specify WaitTimeSeconds in the request, the queue attribute ReceiveMessageWaitTimeSeconds is used to determine how long to wait.

Integer

redrivePolicy (queue)

Specify the policy that send message to DeadLetter queue. See detail at Amazon docs.

String

backoffErrorThreshold (scheduler)

The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in.

int

backoffIdleThreshold (scheduler)

The number of subsequent idle polls that should happen before the backoffMultipler should kick-in.

int

backoffMultiplier (scheduler)

To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured.

int

delay (scheduler)

Milliseconds before the next poll.

long

greedy (scheduler)

If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages.

boolean

initialDelay (scheduler)

Milliseconds before the first poll starts.

long

repeatCount (scheduler)

Specifies a maximum limit of number of fires. So if you set it to 1, the scheduler will only fire once. If you set it to 5, it will only fire five times. A value of zero or negative means fire forever.

long

runLoggingLevel (scheduler)

The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that.

Enum values:

  • TRACE

  • DEBUG

  • INFO

  • WARN

  • ERROR

  • OFF

LoggingLevel

scheduledExecutorService (scheduler)

Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool.

ScheduledExecutorService

scheduler (scheduler)

To use a cron scheduler from either camel-spring or camel-quartz component. Use value spring or quartz for built in scheduler.

Object

schedulerProperties (scheduler)

To configure additional properties when using a custom scheduler or any of the Quartz, Spring based scheduler.

Map

startScheduler (scheduler)

Whether the scheduler should be auto started.

boolean

timeUnit (scheduler)

Time unit for initialDelay and delay options.

Enum values:

  • NANOSECONDS

  • MICROSECONDS

  • MILLISECONDS

  • SECONDS

  • MINUTES

  • HOURS

  • DAYS

TimeUnit

useFixedDelay (scheduler)

Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details.

boolean

accessKey (security)

Amazon AWS Access Key.

String

secretKey (security)

Amazon AWS Secret Key.

String

Required SQS component options

You have to provide the amazonSQSClient in the Registry or your accessKey and secretKey to access the Amazon’s SQS.

Batch Consumer

This component implements the Batch Consumer.

This allows you for instance to know how many messages exists in this batch and for instance let the Aggregator aggregate this number of messages.

Usage

Static credentials vs Default Credential Provider

You have the possibility of avoiding the usage of explicit static credentials, by specifying the useDefaultCredentialsProvider option and set it to true.

  • Java system properties - aws.accessKeyId and aws.secretKey

  • Environment variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.

  • Web Identity Token from AWS STS.

  • The shared credentials and config files.

  • Amazon ECS container credentials - loaded from the Amazon ECS if the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI is set.

  • Amazon EC2 Instance profile credentials.

For more information about this you can look at AWS credentials documentation

Message headers set by the SQS producer

Header Type Description

CamelAwsSqsMD5OfBody

String

The MD5 checksum of the Amazon SQS message.

CamelAwsSqsMessageId

String

The Amazon SQS message ID.

CamelAwsSqsDelaySeconds

Integer

The delay seconds that the Amazon SQS message can be see by others.

Message headers set by the SQS consumer

Header Type Description

CamelAwsSqsMD5OfBody

String

The MD5 checksum of the Amazon SQS message.

CamelAwsSqsMessageId

String

The Amazon SQS message ID.

CamelAwsSqsReceiptHandle

String

The Amazon SQS message receipt handle.

CamelAwsSqsMessageAttributes

Map<String, String>

The Amazon SQS message attributes.

Advanced AmazonSQS configuration

If your Camel Application is running behind a firewall or if you need to have more control over the SqsClient instance configuration, you can create your own instance:

from("aws2-sqs://MyQueue?amazonSQSClient=#client&delay=5000&maxMessagesPerPoll=5")
.to("mock:result");

Creating or updating an SQS Queue

In the SQS Component, when an endpoint is started, a check is executed to obtain information about the existence of the queue or not. You’re able to customize the creation through the QueueAttributeName mapping with the SQSConfiguration option.

from("aws2-sqs://MyQueue?amazonSQSClient=#client&delay=5000&maxMessagesPerPoll=5")
.to("mock:result");

In this example if the MyQueue queue is not already created on AWS (and the autoCreateQueue option is set to true), it will be created with default parameters from the SQS configuration. If it’s already up on AWS, the SQS configuration options will be used to override the existent AWS configuration.

DelayQueue VS Delay for Single message

When the option delayQueue is set to true, the SQS Queue will be a DelayQueue with the DelaySeconds option as delay. For more information about DelayQueue you can read the AWS SQS documentation. One important information to take into account is the following:

  • For standard queues, the per-queue delay setting is not retroactive—changing the setting doesn’t affect the delay of messages already in the queue.

  • For FIFO queues, the per-queue delay setting is retroactive—changing the setting affects the delay of messages already in the queue.

as stated in the official documentation. If you want to specify a delay on single messages, you can ignore the delayQueue option, while you can set this option to true, if you need to add a fixed delay to all messages enqueued.

Server Side Encryption

There is a set of Server Side Encryption attributes for a queue. The related option are serverSideEncryptionEnabled, keyMasterKeyId and kmsDataKeyReusePeriod. The SSE is disabled by default. You need to explicitly set the option to true and set the related parameters as queue attributes.

JMS-style Selectors

SQS does not allow selectors, but you can effectively achieve this by using the Camel Filter EIP and setting an appropriate visibilityTimeout. When SQS dispatches a message, it will wait up to the visibility timeout before it will try to dispatch the message to a different consumer unless a DeleteMessage is received. By default, Camel will always send the DeleteMessage at the end of the route, unless the route ended in failure. To achieve appropriate filtering and not send the DeleteMessage even on successful completion of the route, use a Filter:

from("aws2-sqs://MyQueue?amazonSQSClient=#client&defaultVisibilityTimeout=5000&deleteIfFiltered=false&deleteAfterRead=false")
.filter("${header.login} == true")
  .setProperty(Sqs2Constants.SQS_DELETE_FILTERED, constant(true))
  .to("mock:filter");

In the above code, if an exchange doesn’t have an appropriate header, it will not make it through the filter AND also not be deleted from the SQS queue. After 5000 milliseconds, the message will become visible to other consumers.

Note we must set the property Sqs2Constants.SQS_DELETE_FILTERED to true to instruct Camel to send the DeleteMessage, if being filtered.

Available Producer Operations

  • single message (default)

  • sendBatchMessage

  • deleteMessage

  • listQueues

Send Message

You can set a SendMessageBatchRequest or an Iterable

from("direct:start")
  .setBody(constant("Camel rocks!"))
  .to("aws2-sqs://camel-1?accessKey=RAW(xxx)&secretKey=RAW(xxx)&region=eu-west-1");

Send Batch Message

You can set a SendMessageBatchRequest or an Iterable

from("direct:start")
  .setHeader(SqsConstants.SQS_OPERATION, constant("sendBatchMessage"))
  .process(new Processor() {
      @Override
      public void process(Exchange exchange) throws Exception {
          Collection c = new ArrayList<Integer>();
          c.add("team1");
          c.add("team2");
          c.add("team3");
          c.add("team4");
          exchange.getIn().setBody(c);
      }
  })
  .to("aws2-sqs://camel-1?accessKey=RAW(xxx)&secretKey=RAW(xxx)&region=eu-west-1");

As result you’ll get an exchange containing a SendMessageBatchResponse instance, that you can examinate to check what messages were successfull and what not. The id set on each message of the batch will be a Random UUID.

Delete single Message

Use deleteMessage operation to delete a single message. You’ll need to set a receipt handle header for the message you want to delete.

from("direct:start")
  .setHeader(SqsConstants.SQS_OPERATION, constant("deleteMessage"))
  .setHeader(SqsConstants.RECEIPT_HANDLE, constant("123456"))
  .to("aws2-sqs://camel-1?accessKey=RAW(xxx)&secretKey=RAW(xxx)&region=eu-west-1");

As result you’ll get an exchange containing a DeleteMessageResponse instance, that you can use to check if the message was deleted or not.

List Queues

Use listQueues operation to list queues.

from("direct:start")
  .setHeader(SqsConstants.SQS_OPERATION, constant("listQueues"))
  .to("aws2-sqs://camel-1?accessKey=RAW(xxx)&secretKey=RAW(xxx)&region=eu-west-1");

As result you’ll get an exchange containing a ListQueuesResponse instance, that you can examinate to check the actual queues.

Purge Queue

Use purgeQueue operation to purge queue.

from("direct:start")
  .setHeader(SqsConstants.SQS_OPERATION, constant("purgeQueue"))
  .to("aws2-sqs://camel-1?accessKey=RAW(xxx)&secretKey=RAW(xxx)&region=eu-west-1");

As result you’ll get an exchange containing a PurgeQueueResponse instance.

Queue Autocreation

With the option autoCreateQueue users are able to avoid the autocreation of an SQS Queue in case it doesn’t exist. The default for this option is true. If set to false any operation on a not-existent queue in AWS won’t be successful and an error will be returned.

Send Batch Message and Message Deduplication Strategy

In case you’re using a SendBatchMessage Operation, you can set two different kind of Message Deduplication Strategy: - useExchangeId - useContentBasedDeduplication

The first one will use a ExchangeIdMessageDeduplicationIdStrategy, that will use the Exchange ID as parameter The other one will use a NullMessageDeduplicationIdStrategy, that will use the body as deduplication element.

In case of send batch message operation, you’ll need to use the useContentBasedDeduplication and on the Queue you’re pointing you’ll need to enable the content based deduplication option.

Dependencies

Maven users will need to add the following dependency to their pom.xml.

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws2-sqs</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel.

Spring Boot Auto-Configuration

When using aws2-sqs with 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-aws2-sqs-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 44 options, which are listed below.

Name Description Default Type

camel.component.aws2-sqs.access-key

Amazon AWS Access Key.

String

camel.component.aws2-sqs.amazon-a-w-s-host

The hostname of the Amazon AWS cloud.

amazonaws.com

String

camel.component.aws2-sqs.amazon-s-q-s-client

To use the AmazonSQS as client. The option is a software.amazon.awssdk.services.sqs.SqsClient type.

SqsClient

camel.component.aws2-sqs.attribute-names

A list of attribute names to receive when consuming. Multiple names can be separated by comma.

String

camel.component.aws2-sqs.auto-create-queue

Setting the autocreation of the queue.

false

Boolean

camel.component.aws2-sqs.autowired-enabled

Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc.

true

Boolean

camel.component.aws2-sqs.batch-separator

Set the separator when passing a String to send batch message operation.

,

String

camel.component.aws2-sqs.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.aws2-sqs.concurrent-consumers

Allows you to use multiple threads to poll the sqs queue to increase throughput.

1

Integer

camel.component.aws2-sqs.configuration

The AWS SQS default configuration. The option is a org.apache.camel.component.aws2.sqs.Sqs2Configuration type.

Sqs2Configuration

camel.component.aws2-sqs.default-visibility-timeout

The default visibility timeout (in seconds).

Integer

camel.component.aws2-sqs.delay-queue

Define if you want to apply delaySeconds option to the queue or on single messages.

false

Boolean

camel.component.aws2-sqs.delay-seconds

Delay sending messages for a number of seconds.

Integer

camel.component.aws2-sqs.delete-after-read

Delete message from SQS after it has been read.

true

Boolean

camel.component.aws2-sqs.delete-if-filtered

Whether or not to send the DeleteMessage to the SQS queue if the exchange has property with key Sqs2Constants#SQS_DELETE_FILTERED (CamelAwsSqsDeleteFiltered) set to true.

true

Boolean

camel.component.aws2-sqs.enabled

Whether to enable auto configuration of the aws2-sqs component. This is enabled by default.

Boolean

camel.component.aws2-sqs.extend-message-visibility

If enabled then a scheduled background task will keep extending the message visibility on SQS. This is needed if it takes a long time to process the message. If set to true defaultVisibilityTimeout must be set. See details at Amazon docs.

false

Boolean

camel.component.aws2-sqs.kms-data-key-reuse-period-seconds

The length of time, in seconds, for which Amazon SQS can reuse a data key to encrypt or decrypt messages before calling AWS KMS again. An integer representing seconds, between 60 seconds (1 minute) and 86,400 seconds (24 hours). Default: 300 (5 minutes).

Integer

camel.component.aws2-sqs.kms-master-key-id

The ID of an AWS-managed customer master key (CMK) for Amazon SQS or a custom CMK.

String

camel.component.aws2-sqs.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.aws2-sqs.maximum-message-size

The maximumMessageSize (in bytes) an SQS message can contain for this queue.

Integer

camel.component.aws2-sqs.message-attribute-names

A list of message attribute names to receive when consuming. Multiple names can be separated by comma.

String

camel.component.aws2-sqs.message-deduplication-id-strategy

Only for FIFO queues. Strategy for setting the messageDeduplicationId on the message. Can be one of the following options: useExchangeId, useContentBasedDeduplication. For the useContentBasedDeduplication option, no messageDeduplicationId will be set on the message.

useExchangeId

String

camel.component.aws2-sqs.message-group-id-strategy

Only for FIFO queues. Strategy for setting the messageGroupId on the message. Can be one of the following options: useConstant, useExchangeId, usePropertyValue. For the usePropertyValue option, the value of property CamelAwsMessageGroupId will be used.

String

camel.component.aws2-sqs.message-retention-period

The messageRetentionPeriod (in seconds) a message will be retained by SQS for this queue.

Integer

camel.component.aws2-sqs.operation

The operation to do in case the user don’t want to send only a message.

Sqs2Operations

camel.component.aws2-sqs.override-endpoint

Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option.

false

Boolean

camel.component.aws2-sqs.policy

The policy for this queue. It can be loaded by default from classpath, but you can prefix with classpath:, file:, or http: to load the resource from different systems.

String

camel.component.aws2-sqs.protocol

The underlying protocol used to communicate with SQS.

https

String

camel.component.aws2-sqs.proxy-host

To define a proxy host when instantiating the SQS client.

String

camel.component.aws2-sqs.proxy-port

To define a proxy port when instantiating the SQS client.

Integer

camel.component.aws2-sqs.proxy-protocol

To define a proxy protocol when instantiating the SQS client.

Protocol

camel.component.aws2-sqs.queue-owner-a-w-s-account-id

Specify the queue owner aws account id when you need to connect the queue with different account owner.

String

camel.component.aws2-sqs.queue-url

To define the queueUrl explicitly. All other parameters, which would influence the queueUrl, are ignored. This parameter is intended to be used, to connect to a mock implementation of SQS, for testing purposes.

String

camel.component.aws2-sqs.receive-message-wait-time-seconds

If you do not specify WaitTimeSeconds in the request, the queue attribute ReceiveMessageWaitTimeSeconds is used to determine how long to wait.

Integer

camel.component.aws2-sqs.redrive-policy

Specify the policy that send message to DeadLetter queue. See detail at Amazon docs.

String

camel.component.aws2-sqs.region

The region in which SQS client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example ap-east-1) You’ll need to use the name Region.EU_WEST_1.id().

String

camel.component.aws2-sqs.secret-key

Amazon AWS Secret Key.

String

camel.component.aws2-sqs.server-side-encryption-enabled

Define if Server Side Encryption is enabled or not on the queue.

false

Boolean

camel.component.aws2-sqs.trust-all-certificates

If we want to trust all certificates in case of overriding the endpoint.

false

Boolean

camel.component.aws2-sqs.uri-endpoint-override

Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option.

String

camel.component.aws2-sqs.use-default-credentials-provider

Set whether the SQS client should expect to load credentials on an AWS infra instance or to expect static credentials to be passed in.

false

Boolean

camel.component.aws2-sqs.visibility-timeout

The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a ReceiveMessage request to set in the com.amazonaws.services.sqs.model.SetQueueAttributesRequest. This only make sense if its different from defaultVisibilityTimeout. It changes the queue visibility timeout attribute permanently.

Integer

camel.component.aws2-sqs.wait-time-seconds

Duration in seconds (0 to 20) that the ReceiveMessage action call will wait until a message is in the queue to include in the response.

Integer