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Chapter 35. AWS Simple Notification System Component
Available as of Camel version 2.8
The SNS component allows messages to be sent to an Amazon Simple Notification Topic. The implementation of the Amazon API is provided by the AWS SDK.
Prerequisites
You must have a valid Amazon Web Services developer account, and be signed up to use Amazon SNS. More information are available at Amazon SNS.
35.1. URI Format
aws-sns://topicNameOrArn[?options]
The topic will be created if they don’t already exists.
You can append query options to the URI in the following format, ?options=value&option2=value&…
35.2. URI Options
The AWS Simple Notification System component supports 5 options, which are listed below.
| Name | Description | Default | Type |
|---|---|---|---|
| configuration (advanced) | The AWS SNS default configuration | SnsConfiguration | |
| accessKey (producer) | Amazon AWS Access Key | String | |
| secretKey (producer) | Amazon AWS Secret Key | String | |
| region (producer) | The region in which SNS client needs to work | String | |
| resolveProperty Placeholders (advanced) | Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. | true | boolean |
The AWS Simple Notification System endpoint is configured using URI syntax:
aws-sns:topicNameOrArn
with the following path and query parameters:
35.2.1. Path Parameters (1 parameters):
| Name | Description | Default | Type |
|---|---|---|---|
| topicNameOrArn | Required Topic name or ARN | String |
35.2.2. Query Parameters (11 parameters):
| Name | Description | Default | Type |
|---|---|---|---|
| amazonSNSClient (producer) | To use the AmazonSNS as the client | AmazonSNS | |
| headerFilterStrategy (producer) | To use a custom HeaderFilterStrategy to map headers to/from Camel. | HeaderFilterStrategy | |
| messageStructure (producer) | The message structure to use such as json | String | |
| policy (producer) | The policy for this queue | String | |
| proxyHost (producer) | To define a proxy host when instantiating the SNS client | String | |
| proxyPort (producer) | To define a proxy port when instantiating the SNS client | Integer | |
| region (producer) | The region in which SNS client needs to work | String | |
| subject (producer) | The subject which is used if the message header 'CamelAwsSnsSubject' is not present. | String | |
| 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 |
35.3. Spring Boot Auto-Configuration
The component supports 16 options, which are listed below.
| Name | Description | Default | Type |
|---|---|---|---|
| camel.component.aws-sns.access-key | Amazon AWS Access Key | String | |
| camel.component.aws-sns.configuration.access-key | Amazon AWS Access Key | String | |
| camel.component.aws-sns.configuration.amazon-s-n-s-client | To use the AmazonSNS as the client | AmazonSNS | |
| camel.component.aws-sns.configuration.message-structure | The message structure to use such as json | String | |
| camel.component.aws-sns.configuration.policy | The policy for this queue | String | |
| camel.component.aws-sns.configuration.proxy-host | To define a proxy host when instantiating the SNS client | String | |
| camel.component.aws-sns.configuration.proxy-port | To define a proxy port when instantiating the SNS client | Integer | |
| camel.component.aws-sns.configuration.region | The region in which SNS client needs to work | String | |
| camel.component.aws-sns.configuration.secret-key | Amazon AWS Secret Key | String | |
| camel.component.aws-sns.configuration.subject | The subject which is used if the message header 'CamelAwsSnsSubject' is not present. | String | |
| camel.component.aws-sns.configuration.topic-arn | The Amazon Resource Name (ARN) assigned to the created topic. | String | |
| camel.component.aws-sns.configuration.topic-name | The name of the topic | String | |
| camel.component.aws-sns.enabled | Enable aws-sns component | true | Boolean |
| camel.component.aws-sns.region | The region in which SNS client needs to work | String | |
| camel.component.aws-sns.resolve-property-placeholders | Whether the component should resolve property placeholders on itself when starting. Only properties which are of String type can use property placeholders. | true | Boolean |
| camel.component.aws-sns.secret-key | Amazon AWS Secret Key | String |
Required SNS component options
You have to provide the amazonSNSClient in the Registry or your accessKey and secretKey to access the Amazon’s SNS.
35.4. Usage
35.4.1. Message headers evaluated by the SNS producer
| Header | Type | Description |
|---|---|---|
|
|
|
The Amazon SNS message subject. If not set, the subject from the |
35.4.2. Message headers set by the SNS producer
| Header | Type | Description |
|---|---|---|
|
|
| The Amazon SNS message ID. |
35.4.3. Advanced AmazonSNS configuration
If you need more control over the AmazonSNS instance configuration you can create your own instance and refer to it from the URI:
from("direct:start")
.to("aws-sns://MyTopic?amazonSNSClient=#client");
The #client refers to a AmazonSNS 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);
AmazonSNS client = new AmazonSNSClient(awsCredentials, clientConfiguration);
registry.bind("client", client);35.5. 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 or higher).
35.6. See Also
- Configuring Camel
- Component
- Endpoint
- Getting Started
- AWS Component
