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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):
| Name | Description | Default | Type |
|---|---|---|---|
| domainName | Required The name of the domain currently worked with. | String |
30.2.2. 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.
30.3. Usage
30.3.1. Message headers evaluated by the SDB producer
| Header | Type | Description |
|---|---|---|
|
|
| List of attributes to be acted upon. |
|
|
| The names of the attributes to be retrieved. |
|
|
| Determines whether or not strong consistency should be enforced when data is read. |
|
|
| A list of items on which to perform the delete operation in a batch. |
|
|
| The name of the domain currently worked with. |
|
|
| The unique key for this item |
|
|
| The maximum number of domain names you want returned. The range is 1 * to 100. |
|
|
| A string specifying where to start the next list of domain/item names. |
|
|
| To override the operation from the URI options. |
|
|
| List of attributes to put in an Item. |
|
|
| A list of items to put in a Domain. |
|
|
| The expression used to query the domain. |
|
|
| 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
| Header | Type | Description |
|---|---|---|
|
|
| The data and time when metadata was calculated, in Epoch (UNIX) seconds. |
|
|
| The number of all items in the domain. |
|
|
| The number of unique attribute names in the domain. |
|
|
| The number of all attribute name/value pairs in the domain. |
|
|
| The total size of all unique attribute names in the domain, in bytes. |
|
|
| The total size of all attribute values in the domain, in bytes. |
|
|
| The total size of all item names in the domain, in bytes. |
30.3.3. Message headers set during GetAttributes operation
| Header | Type | Description |
|---|---|---|
|
|
| The list of attributes returned by the operation. |
30.3.4. Message headers set during ListDomains operation
| Header | Type | Description |
|---|---|---|
|
|
| A list of domain names that match the expression. |
|
|
| An opaque token indicating that there are more domains than the specified MaxNumberOfDomains still available. |
30.3.5. Message headers set during Select operation
| Header | Type | Description |
|---|---|---|
|
|
| A list of items that match the select expression. |
|
|
| 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
