AWS DynamoDB

Since Camel 2.10

Only producer is supported

The 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

aws-ddb://domainName[?options]

You can append query options to the URI in the following format, ?options=value&option2=value&…​

URI Options

The AWS DynamoDB component supports 17 options, which are listed below.

Name Description Default Type

amazonDDBClient (producer)

To use the AmazonDynamoDB as the client

AmazonDynamoDB

autoDiscoverClient (common)

Setting the autoDiscoverClient mechanism, if true, the component will look for a client instance in the registry automatically otherwise it will skip that checking.

true

boolean

configuration (producer)

The component configuration

DdbConfiguration

consistentRead (producer)

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

false

boolean

keyAttributeName (producer)

Attribute name when creating table

String

keyAttributeType (producer)

Attribute type when creating table

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.

false

boolean

operation (producer)

What operation to perform. There are 10 enums and the value can be one of: BatchGetItems, DeleteItem, DeleteTable, DescribeTable, GetItem, PutItem, Query, Scan, UpdateItem, UpdateTable

PutItem

DdbOperations

proxyHost (producer)

To define a proxy host when instantiating the DDB client

String

proxyPort (producer)

To define a proxy port when instantiating the DDB client. When using this parameter, the configuration will expect the capitalized name of the region (for example AP_EAST_1) You’ll need to use the name Regions.EU_WEST_1.name()

Integer

proxyProtocol (producer)

To define a proxy protocol when instantiating the DDB client. There are 2 enums and the value can be one of: HTTP, HTTPS

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

writeCapacity (producer)

The provisioned throughput to reserved for writing resources to your table

Long

basicPropertyBinding (advanced)

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

false

boolean

accessKey (security)

Amazon AWS Access Key

String

secretKey (security)

Amazon AWS Secret Key

String

The AWS DynamoDB endpoint is configured using URI syntax:

aws-ddb:tableName

with the following path and query parameters:

Path Parameters (1 parameters):

Name Description Default Type

tableName

Required The name of the table currently worked with.

String

Query Parameters (17 parameters):

Name Description Default Type

amazonDDBClient (producer)

To use the AmazonDynamoDB as the client

AmazonDynamoDB

autoDiscoverClient (common)

Setting the autoDiscoverClient mechanism, if true, the component will look for a client instance in the registry automatically otherwise it will skip that checking.

true

boolean

consistentRead (producer)

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

false

boolean

keyAttributeName (producer)

Attribute name when creating table

String

keyAttributeType (producer)

Attribute type when creating table

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.

false

boolean

operation (producer)

What operation to perform. There are 10 enums and the value can be one of: BatchGetItems, DeleteItem, DeleteTable, DescribeTable, GetItem, PutItem, Query, Scan, UpdateItem, UpdateTable

PutItem

DdbOperations

proxyHost (producer)

To define a proxy host when instantiating the DDB client

String

proxyPort (producer)

To define a proxy port when instantiating the DDB client. When using this parameter, the configuration will expect the capitalized name of the region (for example AP_EAST_1) You’ll need to use the name Regions.EU_WEST_1.name()

Integer

proxyProtocol (producer)

To define a proxy protocol when instantiating the DDB client. There are 2 enums and the value can be one of: HTTP, HTTPS

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

writeCapacity (producer)

The provisioned throughput to reserved for writing resources to your table

Long

basicPropertyBinding (advanced)

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

false

boolean

synchronous (advanced)

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

false

boolean

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

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("aws-ddb://domainName?amazonDDBClient=#client");

The #client refers to a AmazonDynamoDB in the Registry.

For example if your Camel Application is running behind a firewall:

AWSCredentials awsCredentials = new BasicAWSCredentials("myAccessKey", "mySecretKey");
ClientConfiguration clientConfiguration = new ClientConfiguration();
clientConfiguration.setProxyHost("http://myProxyHost");
clientConfiguration.setProxyPort(8080);

AmazonDynamoDB client = new AmazonDynamoDBClient(awsCredentials, clientConfiguration);

registry.bind("client", client);

Supported producer operations

  • BatchGetItems

  • DeleteItem

  • DeleteTable

  • DescribeTable

  • GetItem

  • PutItem

  • Query

  • Scan

  • UpdateItem

  • UpdateTable

Automatic detection of AmazonDynamoDB client in registry

The component is capable of detecting the presence of an AmazonDynamoDB bean into the registry. If it’s the only instance of that type it will be used as client and you won’t have to define it as uri parameter. This may be really useful for smarter configuration of the endpoint.

Dependencies

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

pom.xml

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

The component supports 33 options, which are listed below.

Name Description Default Type

camel.component.aws-ddb.access-key

Amazon AWS Access Key

String

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

To use the AmazonDynamoDB as the client. The option is a com.amazonaws.services.dynamodbv2.AmazonDynamoDB type.

AmazonDynamoDB

camel.component.aws-ddb.auto-discover-client

Setting the autoDiscoverClient mechanism, if true, the component will look for a client instance in the registry automatically otherwise it will skip that checking.

true

Boolean

camel.component.aws-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.aws-ddb.configuration

The component configuration. The option is a org.apache.camel.component.aws.ddb.DdbConfiguration type.

DdbConfiguration

camel.component.aws-ddb.consistent-read

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

false

Boolean

camel.component.aws-ddb.enabled

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

Boolean

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

Attribute name when creating table

String

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

Attribute type when creating table

String

camel.component.aws-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.aws-ddb.operation

What operation to perform

DdbOperations

camel.component.aws-ddb.proxy-host

To define a proxy host when instantiating the DDB client

String

camel.component.aws-ddb.proxy-port

To define a proxy port when instantiating the DDB client. When using this parameter, the configuration will expect the capitalized name of the region (for example AP_EAST_1) You’ll need to use the name Regions.EU_WEST_1.name()

Integer

camel.component.aws-ddb.proxy-protocol

To define a proxy protocol when instantiating the DDB client

Protocol

camel.component.aws-ddb.read-capacity

The provisioned throughput to reserve for reading resources from your table

Long

camel.component.aws-ddb.region

The region in which DDB client needs to work

String

camel.component.aws-ddb.secret-key

Amazon AWS Secret Key

String

camel.component.aws-ddb.write-capacity

The provisioned throughput to reserved for writing resources to your table

Long

camel.component.aws-ddbstream.access-key

Amazon AWS Access Key

String

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

Amazon DynamoDB client to use for all requests for this endpoint. The option is a com.amazonaws.services.dynamodbv2.AmazonDynamoDBStreams type.

AmazonDynamoDBStreams

camel.component.aws-ddbstream.auto-discover-client

Setting the autoDiscoverClient mechanism, if true, the component will look for a client instance in the registry automatically otherwise it will skip that checking

true

Boolean

camel.component.aws-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.aws-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.aws-ddbstream.configuration

The component configuration. The option is a org.apache.camel.component.aws.ddbstream.DdbStreamConfiguration type.

DdbStreamConfiguration

camel.component.aws-ddbstream.enabled

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

Boolean

camel.component.aws-ddbstream.iterator-type

Defines where in the DynaboDB stream to start getting records. Note that using TRIM_HORIZON can cause a significant delay before the stream has caught up to real-time. if {AT,AFTER}_SEQUENCE_NUMBER are used, then a sequenceNumberProvider MUST be supplied.

ShardIteratorType

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

Maximum number of records that will be fetched in each poll

Integer

camel.component.aws-ddbstream.proxy-host

To define a proxy host when instantiating the DDBStreams client

String

camel.component.aws-ddbstream.proxy-port

To define a proxy port when instantiating the DDBStreams client

Integer

camel.component.aws-ddbstream.proxy-protocol

To define a proxy protocol when instantiating the DDBStreams client

Protocol

camel.component.aws-ddbstream.region

The region in which DDBStreams client needs to work

String

camel.component.aws-ddbstream.secret-key

Amazon AWS Secret Key

String

camel.component.aws-ddbstream.sequence-number-provider

Provider for the sequence number when using one of the two ShardIteratorType.{AT,AFTER}_SEQUENCE_NUMBER iterator types. Can be a registry reference or a literal sequence number. The option is a org.apache.camel.component.aws.ddbstream.SequenceNumberProvider type.

SequenceNumberProvider
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