Token is locked by token[26]

[seanmcelroy]

Hello,

I have created a simple example jBPM project and I can deploy it using jbpm-console. I have create a state node like this:

<state name="GenerateLetterOfOffer">
 <event type="node-enter">
 <action class="com.sample.action.LOAActionHandler">
 </action>
 </event>
</state>

In the class com.sample.action.LOAActionHandler I have coded the execute method like this:

public void execute(ExecutionContext context) throws Exception {
 System.out.println("Letter of offer generated");
 context.getToken().signal();
}

When the signal method is executed I get this error message:
"org.jbpm.JbpmException" was thrown. The message is: this token is locked by token[26]

Can you tell me what I am doing wrong. I have tried using the transiation tag and adding an action to it, but the execute method never gets call in this instance.

Thanks.

[jpechanec]

Hi,

look at http://www.jboss.com/index.html?module=bb&op=viewtopic&t=129225

[seanmcelroy]

Thanks. This has left me a bit confused as to why or when would one use a state node, if you can't automate the control flow?

[kukeltje]

then don't use a state but a 'node' and have the class as the implementation of the node, not an action

[seanmcelroy]

Thanks again. I understand that they use a node and not a state, what I can't quite get to grips with is why and when would you use a state node?

[kukeltje]

states by default are wait states. Nodes can have automatic transitions, so do something and immediately go on. Think of doing something synchronous in a remote system.