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RabbitMQ Component

Available as of Camel 2.12

The rabbitmq: component allows you produce and consume messages from RabbitMQ instances. Using the RabbitMQ AMQP client, this component offers a pure RabbitMQ approach over the generic amqp: component.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-rabbitmq</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

rabbitmq:http://hostname[:port]/exchangeName?[options...]://name[?options]

Where hostname is the hostname of the running rabbitmq instance or cluster. Port is optional and if not specified then defaults to the RabbitMQ client default (5672). The exchange name determines which exchange produced messages will sent to. In the case of consumers, the exchange name determines which exchange the queue will bind to.

Options

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Property

Default

Description

autoAck

true

If messages should be auto acknowledged

queue

random uuid

The queue to receive messages from

routingKey

null

The routing key to use when binding a consumer queue to the exchange. For producer routing keys, you set the header (see header section)

threadPoolSize

10

The consumer uses a Thread Pool Executor with a fixed number of threads. This setting allows you to set that number of threads.

username

null

username in case of authenticated access

password

null

password for authenticated access

vhost

/

the vhost for the channel

Headers

The following headers are set on exchanges when consuming messages.

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Property

Value

rabbitmq.ROUTING_KEY

 

rabbitmq.EXCHANGE_NAME

 

rabbitmq.DELIVERY_TAG

 

The following headers are used by the producer. If these are set on the camel exchange then they will be set on the RabbitMQ message.

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Property

Value

rabbitmq.ROUTING_KEY

 

rabbitmq.EXCHANGE_NAME

 

rabbitmq.CONTENT_TYPE

 

rabbitmq.PRIORITY

 

rabbitmq.CORRELATIONID

 

rabbitmq.MESSAGE_ID

 

rabbitmq.DELIVERY_MODE

 

rabbitmq.USERID

 

rabbitmq.CLUSTERID

 

rabbitmq.REPLY_TO

 

rabbitmq.CONTENT_ENCODING

 

rabbitmq.TYPE

 

rabbitmq.EXPIRATION

 

rabbitmq.TIMESTAMP

 

rabbitmq.APP_ID

 

Headers are set by the consumer once the message is received. The producer will also set the headers for downstream processors once the exchange has taken place. Any headers set prior to production that the producer sets will be overriden.

Message Body

The component will use the camel exchange in body as the rabbit mq message body. The camel exchange in object must be convertible to a byte array. Otherwise the producer will throw an exception of unsupported body type.

Samples

To receive messages from a queue that is bound to an exchange A with the routing key B,

from("rabbitmq://localhost/A?routingKey=B")

To receive messages from a queue with a single thread with auto acknowledge disabled.

from("rabbitmq://localhost/A?routingKey=B&threadPoolSize=1&autoAck=false")

To send messages to an exchange called C

...to("rabbitmq://localhost/B")
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