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SQS
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Component
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Available
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as
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of
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Camel
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2.6
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The
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sqs
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component
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supports
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sending
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and
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receiving
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messages
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to
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service.
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}
You must have a valid Amazon Web Services developer account, and be signed up to use Amazon SQS. More information are available at [ |
URI Format
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aws-sqs://queueName[?options] SQS|http://aws.amazon.com/sqs]. {info} h3. URI Format {code} aws-sqs://queue-namequeueNameOrArn[?options] {code} The queue will be created if they (from Camel 2.18) |
The queue will be created if they don't
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already
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exists.
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You
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can
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append
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query
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options
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to
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the
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URI
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in
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the
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following
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format
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: ?options=value&option2=value&...
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URI
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Options
Name | Default Value | Context | Description |
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| Amazon AWS Access Key. |
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| Reference to a |
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in |
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the |
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| The region with which the |
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| A list of attribute names to receive when consuming. Camel 2.17: Multiple names can be separated by comma. Camel 2.16 or older: The type is a Collection so its much harder to configure and use. |
| 1 | Consumer | (as of 2.15.0) Allows you to use multiple threads to poll the SQS queue to increase throughput. You must also set the maxMessagesPerPoll option for this to work properly. |
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| The visibility timeout (in seconds) to set in the |
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| Camel 2.9.3: Delay sending messages for a number of seconds. |
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| Delete message from SQS after it has been read (and processed by the route). If this option is false, then the same objects will be retrieve over and over again on the polls. Therefore you need to use the Idempotent Consumer EIP in the route to filter out duplicates. You can filter using the |
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| Camel 2.12.2, 2.13.0: Whether or not to send the If |
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| Camel 2.10: If enabled a scheduled background task will keep extending the message visibility on SQS. This is needed if it takes a long time to process the message. If set to true See details at Amazon docs. |
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| Camel 2.8: The |
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| The maximum number of messages which can be received in one poll to set in the |
messageAttributeNames | null | Consumer | A list of message attribute names to receive when consuming. Camel 2.17: Multiple names can be separated by comma. Camel 2.16 or older: The type is a Collection so its much harder to configure and use. |
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| Camel 2.8: The |
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| null | Shared | Camel 2.16: Specify a proxy host to be used inside the client definition. |
| null | Shared | Camel 2.16: Specify a proxy port to be used inside the client definition. |
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| Camel 2.12: Specify the queue owner aws account id when you need to connect the queue with different account owner. |
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| Camel 2.8: The policy for this queue to set in the |
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| Camel 2.11: If you do not specify |
| null | Shared | Camel 2.15: Specify the policy that send message to DeadLetter queue. See detail at Amazon docs. |
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| Camel 2.12.3: Specify the queue region which could be used with |
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| Amazon AWS Secret Key. |
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| Camel 2.11: Duration in seconds (0 to 20) that the |
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| The duration (in seconds) that the received messages are hidden from subsequent retrieve requests after being retrieved by a |
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You have to provide the |
Batch Consumer
This component implements the Batch Consumer.
This allows you for instance to know how many messages exists in this batch and for instance let the Aggregator aggregate this number of messages.
Usage
Message headers set by the SQS producer
Header | Type | Description |
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| The MD5 checksum of the Amazon SQS message. |
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| The Amazon SQS message ID. |
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| Since Camel 2.11, the delay seconds that the Amazon SQS message can be see by others. |
Message headers set by the SQS consumer
Header | Type | Description |
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| The MD5 checksum of the Amazon SQS message. |
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| The Amazon SQS message ID. |
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| The Amazon SQS message receipt handle. |
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| The Amazon SQS message attributes. |
Advanced AmazonSQS configuration
If your Camel Application is running behind a firewall or if you need to have more control over the AmazonSQS instance configuration, you can create your own instance:
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}}. | |delaySeconds | {{null}} | Producer | *Camel 2.9.3:* Delay sending messages for a number of seconds. | |waitTimeSeconds | {{0}} | Producer | *Camel 2.11:* Duration in seconds (0 to 20) that the ReceiveMessage action call will wait until a message is in the queue to include in the response. | |receiveMessageWaitTimeSeconds | {{0}} | Shared | *Camel 2.11:* If you do not specify WaitTimeSeconds in the request, the queue attribute ReceiveMessageWaitTimeSeconds is used to determine how long to wait. | |queueOwnerAWSAccountId | {{null}} | *Camel 2.12:* Specify the queue owner aws account id when you need to connect the queue with different account owner. | {div} {info:title=Required SQS component options} You have to provide the amazonSQSClient in the [Registry] or your accessKey and secretKey to access the [Amazon's SQS|http://aws.amazon.com/sqs]. {info} h3. Batch Consumer This component implements the [Batch Consumer]. This allows you for instance to know how many messages exists in this batch and for instance let the [Aggregator] aggregate this number of messages. h3. Usage h4. Message headers set by the SQS producer {div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsSqsMD5OfBody}} | {{String}} | The MD5 checksum of the Amazon SQS message. | | {{CamelAwsSqsMessageId}} | {{String}} | The Amazon SQS message ID. | | {{CamelAwsSqsDelaySeconds}} | {{Integer}} | Since *Camel 2.11*, the delay seconds that the Amazon SQS message can be see by others. | {div} h4. Message headers set by the SQS consumer {div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsSqsMD5OfBody}} | {{String}} | The MD5 checksum of the Amazon SQS message. | | {{CamelAwsSqsMessageId}} | {{String}} | The Amazon SQS message ID. | | {{CamelAwsSqsReceiptHandle}} | {{String}} | The Amazon SQS message receipt handle. | | {{CamelAwsSqsAttributes}} | {{Map<String, String>}} | The Amazon SQS message attributes. | {div} h4. Advanced AmazonSQS configuration If your Camel Application is running behind a firewall or if you need to have more control over the AmazonSQS instance configuration, you can create your own instance: {code} AWSCredentials awsCredentials = new BasicAWSCredentials("myAccessKey", "mySecretKey"); ClientConfiguration clientConfiguration = new ClientConfiguration(); clientConfiguration.setProxyHost("http://myProxyHost"); clientConfiguration.setProxyPort(8080); AmazonSQS client = new AmazonSQSClient(awsCredentials, clientConfiguration); registry.bind("client", client); {code} |
and
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refer
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to
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it
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in
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your
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Camel
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aws-sqs
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component
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configuration:
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{code} from("aws-sqs://MyQueue?amazonSQSClient=#client&delay=5000&maxMessagesPerPoll=5") .to("mock:result"); {code} h3. Dependencies Maven users will need to add the following dependency to their |
Dependencies
Maven users will need to add the following dependency to their pom.xml
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} <dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-aws</artifactId> <version>${camel-version}</version> </dependency> {code} where {{$\ |
where ${camel-version
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}
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must
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be
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replaced
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by
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the
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actual
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version
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of
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Camel
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(2.6
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or
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higher).
JMS-style Selectors
SQS does not allow selectors, but you can effectively achieve this by using the Camel Filter EIP and setting an appropriate visibilityTimeout
. When SQS dispatches a message, it will wait up to the visibility timeout before it will try to dispatch the message to a different consumer unless a DeleteMessage
is received. By default, Camel will always send the DeleteMessage
at the end of the route, unless the route ended in failure. To achieve appropriate filtering and not send the DeleteMessage
even on successful completion of the route, use a Filter:
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from("aws-sqs://MyQueue?amazonSQSClient=#client&defaultVisibilityTimeout=5000&deleteIfFiltered=false") {include:Endpoint See Also} - [AWS Component|AWS] .filter("${header.login} == true") .to("mock:result"); |
In the above code, if an exchange doesn't have an appropriate header, it will not make it through the filter AND also not be deleted from the SQS queue. After 5000
miliseconds, the message will become visible to other consumers.
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