Hi,

I had a few questions about job executor and jbpmcontext,

1.Do we need to close jbpmContext every time after we used it?Like:

public myMethod(){
 JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
 .....
 jbpmContext.close();
}

2.In jbpm.cfg.xml,if I set jobExecutor singleton="false" ,what will happen?

<bean name="jbpm.job.executor" class="org.jbpm.job.executor.JobExecutor" singleton="true">

3.In the jbpm source code ,there is a class DbMessageService.java,below is source code of this class,Could any one tell me why use "synchronized" here?

public void close() {
 if ( (hasProducedJobs)
 && (jobExecutor!=null)
 ) {
 log.debug("messages were produced, job executor will be signalled");
 synchronized(jobExecutor) {
 jobExecutor.notify();
 }
 }
 }