View source for Use of node node

You can define the behavior of a node of type node suing the Action element. This Action is executed when the process arrives to the node.

The Action to be executed can be defined in two ways:

* Using a BeanShell script.
* Using an action handler, this is a Java class which implements the [http://docs.jboss.com/jbpm/v3.2/javadoc-jpdl/org/jbpm/graph/def/ActionHandler.html ActionHandler] interface.

Below we are going to create a sample process with a ''node'' node which make use of an implementation of the [http://docs.jboss.com/jbpm/v3.2/javadoc-jpdl/org/jbpm/graph/def/ActionHandler.html ActionHandler] interface.

In this image you can see the process definition graph:

[[File:Jbpm sample node.png|center]]

This process begins in a start node and go to a ''node'' node where the action to be performed is defined by the class ''MyAction'' which implements the [http://docs.jboss.com/jbpm/v3.2/javadoc-jpdl/org/jbpm/graph/def/ActionHandler.html ActionHandler] interface.

<source lang="java">
public class MyAction implements ActionHandler {
    private static final long serialVersionUID = 1L;

    @Override
    public void execute(ExecutionContext executionContext) throws Exception {
        System.out.println("Executing programmed action...");

        // Go to next node
        executionContext.getToken().signal();
    }
}
</source>

The last line of this action tell the jBPM engine to go to the next node, which in this case is the end node.

<source lang="xml">
<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="urn:jbpm.org:jpdl-3.2" name="node node">
    <start-state name="start">
        <transition to="node"></transition>
    </start-state>
    <node name="node">
        <action class="com.openkm.sample.MyAction"></action>
        <transition to="end">
            <action name="action" class="com.sample.action.MessageActionHandler"></action>
        </transition>
    </node>
   <end-state name="end"></end-state>
</process-definition>
</source>

[[Category: Workflow Guide]]
[[Category: OKM Network]]