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Chapter 32. AWS SimpleDB Component

Available as of Camel version 2.9

The sdb component supports storing and retrieving data from/to Amazon’s SDB service.

Prerequisites

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

32.1. URI Format

aws-sdb://domainName[?options]

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

32.2. URI Options

The AWS SimpleDB component has no options.

The AWS SimpleDB endpoint is configured using URI syntax:

aws-sdb:domainName

with the following path and query parameters:

32.2.1. Path Parameters (1 parameters):

Name	Description	Default	Type
domainName	Required The name of the domain currently worked with.		String

32.2.2. Query Parameters (10 parameters):

Name	Description	Default	Type
accessKey (producer)	Amazon AWS Access Key		String
amazonSDBClient (producer)	To use the AmazonSimpleDB as the client		AmazonSimpleDB
consistentRead (producer)	Determines whether or not strong consistency should be enforced when data is read.	false	boolean
maxNumberOfDomains (producer)	The maximum number of domain names you want returned. The range is 1 to 100.		Integer
operation (producer)	Operation to perform	PutAttributes	SdbOperations
proxyHost (producer)	To define a proxy host when instantiating the SDB client		String
proxyPort (producer)	To define a proxy port when instantiating the SDB client		Integer
region (producer)	The region in which SDB client needs to work		String
secretKey (producer)	Amazon AWS Secret Key		String
synchronous (advanced)	Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).	false	boolean

Required SDB component options

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

32.3. Usage

32.3.1. Message headers evaluated by the SDB producer

Header	Type	Description
`CamelAwsSdbAttributes`	`Collection<Attribute>`	List of attributes to be acted upon.
`CamelAwsSdbAttributeNames`	`Collection<String>`	The names of the attributes to be retrieved.
`CamelAwsSdbConsistentRead`	`Boolean`	Determines whether or not strong consistency should be enforced when data is read.
`CamelAwsSdbDeletableItems`	`Collection<DeletableItem>`	A list of items on which to perform the delete operation in a batch.
`CamelAwsSdbDomainName`	`String`	The name of the domain currently worked with.
`CamelAwsSdbItemName`	`String`	The unique key for this item
`CamelAwsSdbMaxNumberOfDomains`	`Integer`	The maximum number of domain names you want returned. The range is 1 * to 100.
`CamelAwsSdbNextToken`	`String`	A string specifying where to start the next list of domain/item names.
`CamelAwsSdbOperation`	`String`	To override the operation from the URI options.
`CamelAwsSdbReplaceableAttributes`	`Collection<ReplaceableAttribute>`	List of attributes to put in an Item.
`CamelAwsSdbReplaceableItems`	`Collection<ReplaceableItem>`	A list of items to put in a Domain.
`CamelAwsSdbSelectExpression`	`String`	The expression used to query the domain.
`CamelAwsSdbUpdateCondition`	`UpdateCondition`	The update condition which, if specified, determines whether the specified attributes will be updated/deleted or not.

32.3.2. Message headers set during DomainMetadata operation

Header	Type	Description
`CamelAwsSdbTimestamp`	`Integer`	The data and time when metadata was calculated, in Epoch (UNIX) seconds.
`CamelAwsSdbItemCount`	`Integer`	The number of all items in the domain.
`CamelAwsSdbAttributeNameCount`	`Integer`	The number of unique attribute names in the domain.
`CamelAwsSdbAttributeValueCount`	`Integer`	The number of all attribute name/value pairs in the domain.
`CamelAwsSdbAttributeNameSize`	`Long`	The total size of all unique attribute names in the domain, in bytes.
`CamelAwsSdbAttributeValueSize`	`Long`	The total size of all attribute values in the domain, in bytes.
`CamelAwsSdbItemNameSize`	`Long`	The total size of all item names in the domain, in bytes.

32.3.3. Message headers set during GetAttributes operation

Header	Type	Description
`CamelAwsSdbAttributes`	`List<Attribute>`	The list of attributes returned by the operation.

32.3.4. Message headers set during ListDomains operation

Header	Type	Description
`CamelAwsSdbDomainNames`	`List<String>`	A list of domain names that match the expression.
`CamelAwsSdbNextToken`	`String`	An opaque token indicating that there are more domains than the specified MaxNumberOfDomains still available.

32.3.5. Message headers set during Select operation

Header	Type	Description
`CamelAwsSdbItems`	`List<Item>`	A list of items that match the select expression.
`CamelAwsSdbNextToken`	`String`	An opaque token indicating that more items than MaxNumberOfItems were matched, the response size exceeded 1 megabyte, or the execution time exceeded 5 seconds.

32.3.6. Advanced AmazonSimpleDB configuration

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

from("direct:start")
.to("aws-sdb://domainName?amazonSDBClient=#client");

The #client refers to a AmazonSimpleDB 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);

AmazonSimpleDB client = new AmazonSimpleDBClient(awsCredentials, clientConfiguration);

registry.bind("client", client);

32.4. 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</artifactId>
    <version>${camel-version}</version>
</dependency>

where ${camel-version} must be replaced by the actual version of Camel (2.8.4 or higher).

32.5. See Also

Configuring Camel
Component
Endpoint
Getting Started
AWS Component