Chapter 30. 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.

30.1. URI Format

aws-sdb://domainName[?options]

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

30.2. 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:

30.2.1. Path Parameters (1 parameters):

NameDescriptionDefaultType

domainName

Required The name of the domain currently worked with.

 

String

30.2.2. Query Parameters (10 parameters):

NameDescriptionDefaultType

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.

30.3. Usage

30.3.1. Message headers evaluated by the SDB producer

HeaderTypeDescription

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.

30.3.2. Message headers set during DomainMetadata operation

HeaderTypeDescription

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.

30.3.3. Message headers set during GetAttributes operation

HeaderTypeDescription

CamelAwsSdbAttributes

List<Attribute>

The list of attributes returned by the operation.

30.3.4. Message headers set during ListDomains operation

HeaderTypeDescription

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.

30.3.5. Message headers set during Select operation

HeaderTypeDescription

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.

30.3.6. 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);

30.4. 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).

30.5. See Also

  • Configuring Camel
  • Component
  • Endpoint
  • Getting Started
  • AWS Component