topic Java program won't terminate after ProcessEngines.destroy() in Alfresco Archive

Java program won't terminate after ProcessEngines.destroy()

louis44 — Mon, 06 Jul 2015 05:22:37 GMT

I have a Java class I am running with a main method like this: public static void main(String[] args) { ProcessEngineConfiguration engineConfig = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg-file-job.xml"); ProcessEngine engine

Re: Java program won't terminate after ProcessEngines.destroy()

vasile_dirla — Mon, 06 Jul 2015 18:36:19 GMT

Hi Louis,
now will terminate:
<java>
public static void main(String[] args) {
    ProcessEngineConfiguration engineConfig = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg-file-job.xml");

    ProcessEngines.init();

    ProcessEngine engine = engineConfig.buildProcessEngine();
    System.out.println("getting here");
    ProcessEngines.destroy();
    System.out.println("getting there");

    // now will terminate
}
<java>

Re: Java program won't terminate after ProcessEngines.destroy()

louis44 — Mon, 06 Jul 2015 23:12:03 GMT

Interesting. Yes, your example does work. But why? Just because init() was called?

One side effect of this is that if I had a config file called activiti.cfg.xml, the call to ProcessEngines.init() would load that file and then later load the other activiti.cfg-file-job.xml. I end up getting what I want (the configuration in activiti.cfg-file-job.xml is used, but it seems a bit strange to load the other one first.

Re: Java program won't terminate after ProcessEngines.destroy()

jbarrez — Tue, 07 Jul 2015 12:27:23 GMT

How long did you wait for the shutdown? The shutdown of the job executor can take up to a minute if it's busy.

Re: Java program won't terminate after ProcessEngines.destroy()

vasile_dirla — Tue, 07 Jul 2015 12:40:47 GMT

The cause why shutdown was not working is because Processes.isInitialized was false.
This is set to true after the ProcessEngines class is initialized (for details you could have a look into the sources of this class.)

if you prefer to use ProcessEngines.destroy() then you have to call also ProcessEngines.init()
otherwise just create the ProcessEngine instace and call the close() method of it.
<java>
ProcessEngine engine = engineConfig.buildProcessEngine();
    System.out.println("getting here");
    engine.close();
    System.out.println("getting there");
</java>

because ProcessEngines.destroy() does exactly the same but for all the processEngines registered with it.

Re: Java program won't terminate after ProcessEngines.destroy()

louis44 — Sat, 11 Jul 2015 16:57:03 GMT

Thank you.