Difference between revisions of "Use of node node"

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Line 16: Line 16:
 
<source lang="java">
 
<source lang="java">
 
public class MyAction implements ActionHandler {
 
public class MyAction implements ActionHandler {
  @Override
+
    @Override
  public void execute(ExecutionContext executionContext) throws Exception {
+
    public void execute(ExecutionContext executionContext) throws Exception {
    System.out.println("Executing programmed action...");
+
        System.out.println("Executing programmed action...");
  
    // Go to next node
+
        // Go to next node
    executionContext.getProcessInstance().signal();
+
        executionContext.getProcessInstance().signal();
  }
+
    }
 
}
 
}
 
</source>
 
</source>

Revision as of 21:06, 13 January 2012

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 ActionHandler interface.

Below we are going to create a sample process with a node node which make use of an implementation of the ActionHandler interface.

In this image you can see the process definition graph:

Jbpm sample node.png

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 ActionHandler interface.

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

        // Go to next node
        executionContext.getProcessInstance().signal();
    }
}

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