AWS DynamoDB

Since Camel 3.1

Only producer is supported

The AWS2 DynamoDB component supports storing and retrieving data from/to Amazon’s DynamoDB service.

Prerequisites

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

URI Format

aws2-ddb://domainName[?options]

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 DynamoDB component supports 21 options, which are listed below.

Name Description Default Type

amazonDDBClient (producer)

Autowired To use the AmazonDynamoDB as the client.

DynamoDbClient

configuration (producer)

The component configuration.

Ddb2Configuration

consistentRead (producer)

Determines whether or not strong consistency should be enforced when data is read.

boolean

keyAttributeName (producer)

Attribute name when creating table.

String

keyAttributeType (producer)

Attribute type when creating table.

String

keyScalarType (producer)

The key scalar type, it can be S (String), N (Number) and B (Bytes).

String

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

operation (producer)

What operation to perform.

Enum values:

  • BatchGetItems

  • DeleteItem

  • DeleteTable

  • DescribeTable

  • GetItem

  • PutItem

  • Query

  • Scan

  • UpdateItem

  • UpdateTable

Ddb2Operations

overrideEndpoint (producer)

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

boolean

proxyHost (producer)

To define a proxy host when instantiating the DDB client.

String

proxyPort (producer)

The region in which DynamoDB 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().

Integer

proxyProtocol (producer)

To define a proxy protocol when instantiating the DDB client.

Enum values:

  • HTTP

  • HTTPS

Protocol

readCapacity (producer)

The provisioned throughput to reserve for reading resources from your table.

Long

region (producer)

The region in which DDB client needs to work.

String

trustAllCertificates (producer)

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

boolean

uriEndpointOverride (producer)

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

String

useDefaultCredentialsProvider (producer)

Set whether the S3 client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

boolean

writeCapacity (producer)

The provisioned throughput to reserved for writing resources to your table.

Long

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

accessKey (security)

Amazon AWS Access Key.

String

secretKey (security)

Amazon AWS Secret Key.

String

Endpoint Options

The AWS DynamoDB endpoint is configured using URI syntax:

aws2-ddb:tableName

with the following path and query parameters:

Path Parameters (1 parameters)

Name Description Default Type

tableName (producer)

Required The name of the table currently worked with.

String

Query Parameters (19 parameters)

Name Description Default Type

amazonDDBClient (producer)

Autowired To use the AmazonDynamoDB as the client.

DynamoDbClient

consistentRead (producer)

Determines whether or not strong consistency should be enforced when data is read.

boolean

keyAttributeName (producer)

Attribute name when creating table.

String

keyAttributeType (producer)

Attribute type when creating table.

String

keyScalarType (producer)

The key scalar type, it can be S (String), N (Number) and B (Bytes).

String

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

operation (producer)

What operation to perform.

Enum values:

  • BatchGetItems

  • DeleteItem

  • DeleteTable

  • DescribeTable

  • GetItem

  • PutItem

  • Query

  • Scan

  • UpdateItem

  • UpdateTable

Ddb2Operations

overrideEndpoint (producer)

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

boolean

proxyHost (producer)

To define a proxy host when instantiating the DDB client.

String

proxyPort (producer)

The region in which DynamoDB 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().

Integer

proxyProtocol (producer)

To define a proxy protocol when instantiating the DDB client.

Enum values:

  • HTTP

  • HTTPS

Protocol

readCapacity (producer)

The provisioned throughput to reserve for reading resources from your table.

Long

region (producer)

The region in which DDB client needs to work.

String

trustAllCertificates (producer)

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

boolean

uriEndpointOverride (producer)

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

String

useDefaultCredentialsProvider (producer)

Set whether the S3 client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

boolean

writeCapacity (producer)

The provisioned throughput to reserved for writing resources to your table.

Long

accessKey (security)

Amazon AWS Access Key.

String

secretKey (security)

Amazon AWS Secret Key.

String

Required DDB component options

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

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 evaluated by the DDB producer

Header Type Description

CamelAwsDdbBatchItems

Map<String, KeysAndAttributes>

A map of the table name and corresponding items to get by primary key.

CamelAwsDdbTableName

String

Table Name for this operation.

CamelAwsDdbKey

Key

The primary key that uniquely identifies each item in a table.

CamelAwsDdbReturnValues

String

Use this parameter if you want to get the attribute name-value pairs before or after they are modified(NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW).

CamelAwsDdbUpdateCondition

Map<String, ExpectedAttributeValue>

Designates an attribute for a conditional modification.

CamelAwsDdbAttributeNames

Collection<String>

If attribute names are not specified then all attributes will be returned.

CamelAwsDdbConsistentRead

Boolean

If set to true, then a consistent read is issued, otherwise eventually consistent is used.

CamelAwsDdbIndexName

String

If set will be used as Secondary Index for Query operation.

CamelAwsDdbItem

Map<String, AttributeValue>

A map of the attributes for the item, and must include the primary key values that define the item.

CamelAwsDdbExactCount

Boolean

If set to true, Amazon DynamoDB returns a total number of items that match the query parameters, instead of a list of the matching items and their attributes.

CamelAwsDdbKeyConditions

Map<String, Condition>

This header specify the selection criteria for the query, and merge together the two old headers CamelAwsDdbHashKeyValue and CamelAwsDdbScanRangeKeyCondition

CamelAwsDdbStartKey

Key

Primary key of the item from which to continue an earlier query.

CamelAwsDdbHashKeyValue

AttributeValue

Value of the hash component of the composite primary key.

CamelAwsDdbLimit

Integer

The maximum number of items to return.

CamelAwsDdbScanRangeKeyCondition

Condition

A container for the attribute values and comparison operators to use for the query.

CamelAwsDdbScanIndexForward

Boolean

Specifies forward or backward traversal of the index.

CamelAwsDdbScanFilter

Map<String, Condition>

Evaluates the scan results and returns only the desired values.

CamelAwsDdbUpdateValues

Map<String, AttributeValueUpdate>

Map of attribute name to the new value and action for the update.

Message headers set during BatchGetItems operation

Header Type Description

CamelAwsDdbBatchResponse

Map<String,BatchResponse>

Table names and the respective item attributes from the tables.

CamelAwsDdbUnprocessedKeys

Map<String,KeysAndAttributes>

Contains a map of tables and their respective keys that were not processed with the current response.

Message headers set during DeleteItem operation

Header Type Description

CamelAwsDdbAttributes

Map<String, AttributeValue>

The list of attributes returned by the operation.

Message headers set during DeleteTable operation

Header Type Description

CamelAwsDdbProvisionedThroughput

ProvisionedThroughputDescription

The value of the ProvisionedThroughput property for this table

CamelAwsDdbCreationDate

Date

Creation DateTime of this table.

CamelAwsDdbTableItemCount

Long

Item count for this table.

CamelAwsDdbKeySchema

KeySchema

The KeySchema that identifies the primary key for this table. From Camel 2.16.0 the type of this header is List<KeySchemaElement> and not KeySchema

CamelAwsDdbTableName

String

The table name.

CamelAwsDdbTableSize

Long

The table size in bytes.

CamelAwsDdbTableStatus

String

The status of the table: CREATING, UPDATING, DELETING, ACTIVE

Message headers set during DescribeTable operation

Header Type Description

CamelAwsDdbProvisionedThroughput

{{ProvisionedThroughputDescription}}

The value of the ProvisionedThroughput property for this table

CamelAwsDdbCreationDate

Date

Creation DateTime of this table.

CamelAwsDdbTableItemCount

Long

Item count for this table.

CamelAwsDdbKeySchema

{{KeySchema}}

The KeySchema that identifies the primary key for this table.

CamelAwsDdbTableName

String

The table name.

CamelAwsDdbTableSize

Long

The table size in bytes.

CamelAwsDdbTableStatus

String

The status of the table: CREATING, UPDATING, DELETING, ACTIVE

CamelAwsDdbReadCapacity

Long

ReadCapacityUnits property of this table.

CamelAwsDdbWriteCapacity

Long

WriteCapacityUnits property of this table.

Message headers set during GetItem operation

Header Type Description

CamelAwsDdbAttributes

Map<String, AttributeValue>

The list of attributes returned by the operation.

Message headers set during PutItem operation

Header Type Description

CamelAwsDdbAttributes

Map<String, AttributeValue>

The list of attributes returned by the operation.

Message headers set during Query operation

Header Type Description

CamelAwsDdbItems

List<java.util.Map<String,AttributeValue>>

The list of attributes returned by the operation.

CamelAwsDdbLastEvaluatedKey

Key

Primary key of the item where the query operation stopped, inclusive of the previous result set.

CamelAwsDdbConsumedCapacity

Double

The number of Capacity Units of the provisioned throughput of the table consumed during the operation.

CamelAwsDdbCount

Integer

Number of items in the response.

Message headers set during Scan operation

Header Type Description

CamelAwsDdbItems

List<java.util.Map<String,AttributeValue>>

The list of attributes returned by the operation.

CamelAwsDdbLastEvaluatedKey

Key

Primary key of the item where the query operation stopped, inclusive of the previous result set.

CamelAwsDdbConsumedCapacity

Double

The number of Capacity Units of the provisioned throughput of the table consumed during the operation.

CamelAwsDdbCount

Integer

Number of items in the response.

CamelAwsDdbScannedCount

Integer

Number of items in the complete scan before any filters are applied.

Message headers set during UpdateItem operation

Header Type Description

CamelAwsDdbAttributes

Map<String, AttributeValue>

The list of attributes returned by the operation.

Advanced AmazonDynamoDB configuration

If you need more control over the AmazonDynamoDB instance configuration you can create your own instance and refer to it from the URI:

from("direct:start")
.to("aws2-ddb://domainName?amazonDDBClient=#client");

The #client refers to a DynamoDbClient in the Registry.

Supported producer operations

  • BatchGetItems

  • DeleteItem

  • DeleteTable

  • DescribeTable

  • GetItem

  • PutItem

  • Query

  • Scan

  • UpdateItem

  • UpdateTable

Dependencies

Examples

Producer Examples

  • PutItem: this operation will create an entry into DynamoDB

from("direct:start")
  .setHeader(Ddb2Constants.OPERATION, Ddb2Operations.PutItem)
  .setHeader(Ddb2Constants.CONSISTENT_READ, "true")
  .setHeader(Ddb2Constants.RETURN_VALUES, "ALL_OLD")
  .setHeader(Ddb2Constants.ITEM, attributeMap)
  .setHeader(Ddb2Constants.ATTRIBUTE_NAMES, attributeMap.keySet());
  .to("aws2-ddb://" + tableName + "?keyAttributeName=" + attributeName + "&keyAttributeType=" + KeyType.HASH
  + "&keyScalarType=" + ScalarAttributeType.S
  + "&readCapacity=1&writeCapacity=1");

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

pom.xml

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws2-ddb</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-ddb 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-ddb-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 39 options, which are listed below.

Name Description Default Type

camel.component.aws2-ddb.access-key

Amazon AWS Access Key.

String

camel.component.aws2-ddb.amazon-d-d-b-client

To use the AmazonDynamoDB as the client. The option is a software.amazon.awssdk.services.dynamodb.DynamoDbClient type.

DynamoDbClient

camel.component.aws2-ddb.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-ddb.configuration

The component configuration. The option is a org.apache.camel.component.aws2.ddb.Ddb2Configuration type.

Ddb2Configuration

camel.component.aws2-ddb.consistent-read

Determines whether or not strong consistency should be enforced when data is read.

false

Boolean

camel.component.aws2-ddb.enabled

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

Boolean

camel.component.aws2-ddb.key-attribute-name

Attribute name when creating table.

String

camel.component.aws2-ddb.key-attribute-type

Attribute type when creating table.

String

camel.component.aws2-ddb.key-scalar-type

The key scalar type, it can be S (String), N (Number) and B (Bytes).

String

camel.component.aws2-ddb.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-ddb.operation

What operation to perform.

Ddb2Operations

camel.component.aws2-ddb.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-ddb.proxy-host

To define a proxy host when instantiating the DDB client.

String

camel.component.aws2-ddb.proxy-port

The region in which DynamoDB 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().

Integer

camel.component.aws2-ddb.proxy-protocol

To define a proxy protocol when instantiating the DDB client.

Protocol

camel.component.aws2-ddb.read-capacity

The provisioned throughput to reserve for reading resources from your table.

Long

camel.component.aws2-ddb.region

The region in which DDB client needs to work.

String

camel.component.aws2-ddb.secret-key

Amazon AWS Secret Key.

String

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

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

false

Boolean

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

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

String

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

Set whether the S3 client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

false

Boolean

camel.component.aws2-ddb.write-capacity

The provisioned throughput to reserved for writing resources to your table.

Long

camel.component.aws2-ddbstream.access-key

Amazon AWS Access Key.

String

camel.component.aws2-ddbstream.amazon-dynamo-db-streams-client

Amazon DynamoDB client to use for all requests for this endpoint. The option is a software.amazon.awssdk.services.dynamodb.streams.DynamoDbStreamsClient type.

DynamoDbStreamsClient

camel.component.aws2-ddbstream.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-ddbstream.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-ddbstream.configuration

The component configuration. The option is a org.apache.camel.component.aws2.ddbstream.Ddb2StreamConfiguration type.

Ddb2StreamConfiguration

camel.component.aws2-ddbstream.enabled

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

Boolean

camel.component.aws2-ddbstream.max-results-per-request

Maximum number of records that will be fetched in each poll.

Integer

camel.component.aws2-ddbstream.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-ddbstream.proxy-host

To define a proxy host when instantiating the DDBStreams client.

String

camel.component.aws2-ddbstream.proxy-port

To define a proxy port when instantiating the DDBStreams client.

Integer

camel.component.aws2-ddbstream.proxy-protocol

To define a proxy protocol when instantiating the DDBStreams client.

Protocol

camel.component.aws2-ddbstream.region

The region in which DDBStreams client needs to work.

String

camel.component.aws2-ddbstream.secret-key

Amazon AWS Secret Key.

String

camel.component.aws2-ddbstream.stream-iterator-type

Defines where in the DynamoDB stream to start getting records. Note that using FROM_START can cause a significant delay before the stream has caught up to real-time.

Ddb2StreamConfiguration$StreamIteratorType

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

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

false

Boolean

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

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

String

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

Set whether the DynamoDB Streams client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in.

false

Boolean