Publish Subscribe Channel

Camel supports the Publish Subscribe Channel from the EIP patterns using for example the following components:

• JMS for working with JMS Topics for high performance, clustering and load balancing
• XMPP when using rooms for group communication
• SEDA for working with SEDA in the same CamelContext which can work in pub-sub, but allowing multiple consumers.
• VM as SEDA but for intra-JVM.

Using Routing Logic

Another option is to explicitly list the publish-subscribe relationship in your routing logic; this keeps the producer and consumer decoupled but lets you control the fine grained routing configuration using the DSL or Xml Configuration.

Using the Fluent Builders

Using the Spring XML Extensions

<camelContext errorHandlerRef="errorHandler" xmlns="http://camel.apache.org/schema/spring">
    <route>
        <from uri="direct:a"/>
        <multicast>
            <to uri="direct:b"/>
            <to uri="direct:c"/>
            <to uri="direct:d"/>
        </multicast>
    </route>
</camelContext>