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h1. Features

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This Binding Component (BC) allows to interact with external Enterprise Java Beans (EJB) running on an external JEE container. This Binding Component (BC) allows Petals ESB to interact with external Enterprise Java Beans (EJB) running on an external JEE container.

This component has been successfully tested with the following EJB specifications :

* 2.0
* 2.1
* 3.0
* 3.1

On the following JEE container :

* JOnAS
* JBoss
* OC4J
* OpenEJB

This component acts only as a service provider. A JBI message exchange sent to a ServiceEndpoint (mapped to an EJB) is transformed into an EJB call through RMI.
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h1. Component Configuration

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Before installing the bc-ejb component, you must check in your $\{PETALS_HOME}/conf/server.properties configuration file if the property "petals.classloaders.isolated=true" is set and uncommented. The BC-EJB component need the isolated classloaders to work correctly.

The component can be configured through its JBI descriptor file like this :
{code:lang=xml}<?xml version="1.0" encoding="UTF-8"?>
<jbi:jbi xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:petalsCDK="http://petals.ow2.org/components/extensions/version-4.0"
xmlns:jbi="http://java.sun.com/xml/ns/jbi" version="1.0">

<jbi:component type="binding-component" component-class-loader-delegation="parent-first">

<jbi:identification>
<jbi:name>petals-bc-ejb</jbi:name>
<jbi:description>an EJB Binding Component sending messages to local or distant EJB instances</jbi:description>
</jbi:identification>

<jbi:component-class-name>org.ow2.petals.bc.ejb.EjbBC</jbi:component-class-name>
<jbi:component-class-path>
<jbi:path-element/>
</jbi:component-class-path>
<jbi:bootstrap-class-name>org.ow2.petals.component.framework.DefaultBootstrap</jbi:bootstrap-classname>
<jbi:bootstrap-class-path>
<jbi:path-element/>
</jbi:bootstrap-class-path>

<petalsCDK:acceptor-pool-size>5</petalsCDK:acceptor-pool-size>
<petalsCDK:processor-pool-size>10</petalsCDK:processor-pool-size>
<petalsCDK:ignored-status>NOTHING_IGNORED</petalsCDK:ignored-status>
<shared-library>petals-sl-ejb</shared-library>
<petalsCDK:jbi-listener-class-name>org.ow2.petals.bc.ejb.listener.JBIListener</petalsCDK:jbi-listener-class-name>
</jbi:component>
</jbi:jbi>{code}


This component doesn't have any specific configuration parameters.&nbsp;

You can customize the component configuration by changing the following common parameters.
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{warning}EJB binding component can only handle outgoing message (JBI \-> EJB), so you can't specify an external-listenerclass-name.{warning}
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h1. Service Configuration

# The JBI message payload is mapped to Java objects. These objects (and their types) are used as operation parameters&nbsp;for the RMI call. The mapping is done thanks to the PEtALS-JAXB-Databinding library. For more information about&nbsp;XML databinding feel free to read the chapter entitled XML to Java binding.
# The JBI message exchange operation local part is used as the EJB method to invoke.