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How bean methods to be invoked are chosen (if they are not specified explicitly through the method parameter) and how parameter values are constructed from the Message are all defined by the Bean Binding mechanism which is used throughout all of the various Bean Integration mechanisms in Camel.

Examples

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In the following examples we use the Greater EJB which is defined as follows:

Wiki Markup
{snippet:id=e1|lang=java|title=GreaterLocal.java|url=camel/trunk/components/camel-ejb/src/test/java/org/apache/camel/component/ejb/GreaterLocal.java}

And the implementation

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{snippet:id=e1|lang=java|title=GreaterImpl.java|url=camel/trunk/components/camel-ejb/src/test/java/org/apache/camel/component/ejb/GreaterImpl.java}

Using Java DSL

In this example we want to invoke the hello method on the EJB. Since this example is based on an unit test using Apache OpenEJB we have to set a JndiContext on the EJB component with the OpenEJB settings.

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{snippet:id=e1|lang=java|url=camel/trunk/components/camel-ejb/src/test/java/org/apache/camel/component/ejb/GreaterCamelEjbTest.java}

Then we are ready to use the EJB in the Camel route:

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{snippet:id=e2|lang=java|url=camel/trunk/components/camel-ejb/src/test/java/org/apache/camel/component/ejb/GreaterCamelEjbTest.java}
Tip
titleIn a real application server

In a real application server you most likely do not have to setup a JndiContext on the EJB component as it will create a default JndiContext on the same JVM as the application server, which usually allows it to access the JNDI registry and lookup the EJBs.
However if you need to access a application server on a remote JVM or the likes, you have to prepare the properties beforehand.

Using Spring XML

And this is the same example using Spring XML instead:

Again since this is based on an unit test we need to setup the EJB component:

Wiki Markup
{snippet:id=e1|lang=xml|url=camel/trunk/components/camel-ejb/src/test/resources/org/apache/camel/component/ejb/SpringGreaterCamelEjbTest.xml}

Before we are ready to use EJB in the Camel routes:

Wiki Markup
{snippet:id=e2|lang=xml|url=camel/trunk/components/camel-ejb/src/test/resources/org/apache/camel/component/ejb/SpringGreaterCamelEjbTest.xml}
Include Page
CAMEL:Endpoint See Also
CAMEL:Endpoint See Also

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