Page History

VM Component

The vm: component provides asynchronous SEDA behavior, exchanging messages on a BlockingQueue and invoking consumers in a separate thread pool.

This component differs from the Seda component in that VM supports communication across CamelContext instances - so you can use this mechanism to communicate across web applications (provided that camel-core.jar is on the system/boot classpath).

VM is an extension to the Seda component.

URI format

vm:queueName[?options]

Where queueName can be any string to uniquely identify the endpoint within the JVM (or at least within the classloader that loaded camel-core.jar)

You can append query options to the URI in the following format: ?option=value&option=value&...

from("direct:foo").to("vm:bar?concurrentConsumers=5");

from("vm:bar?concurrentConsumers=5").to("file://output");

from("direct:foo").to("vm:bar");

from("vm:bar?concurrentConsumers=5").to("file://output");

Options

See the Seda component for options and other important usage details as the same rules apply to the Vm component.

Samples

In the route below we send exchanges across CamelContext instances to a VM queue named order.email:

from("direct:in").bean(MyOrderBean.class).to("vm:order.email");

And then we receive exchanges in some other Camel context (such as deployed in another .war application):

from("vm:order.email").bean(MyOrderEmailSender.class);

• Seda