topic Re: How to shutdown process engine when Application Server shuts in Alfresco Archive

How to shutdown process engine when Application Server shuts

ruedesilva — Wed, 31 Aug 2011 18:21:33 GMT

Hi, We have Activiti running in Weblogic and it starts when Weblogic server is started with code similar to below in a Weblogic startup class:Context jndi = InitialContextHelper.getInitialContext(InitialContextHelper.TYPE_DATASOURCE); DataSource ds = (DataSource) jndi.lookup(DATASOURCE_JN

Re: How to shutdown process engine when Application Server shuts

jbarrez — Thu, 01 Sep 2011 07:59:09 GMT

Call the destroy method on the processEngine object

For example, in a Spring environment:


 <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean" destroy-method="destroy">
   <property name="processEngineConfiguration" ref="processEngineConfiguration" />
  </bean>

Re: How to shutdown process engine when Application Server shuts

ruedesilva — Thu, 01 Sep 2011 15:17:31 GMT

And this would only destroy after completing all currently running threads right? (Such as any jobs executing).

Also we would like to get a little bit more understanding on how the Job executors work, so that we can explain to customers.

1) Does Activiti create a new thread when the engine starts (i.e. buildProcessEngine)?
2) Does it matter for performance how many jobs we have in the DB running ?( i.e. is it one new thread per scheduled job?) Or there is just one thread that handles everything?
3) What is used for scheduling? A third-party app like Quartz or something built into Activiti?

thanks again,
Rue

Re: How to shutdown process engine when Application Server shuts

frederikherema1 — Fri, 02 Sep 2011 07:27:37 GMT

Yes, it tries to complete all running jobs (with a timeout)

1.Indeed, when "jobExecutorActive" property is set to true, the jobexecutor starts when the process-engine is built.
2. One thread is started that acquires the jobs. These job's are passed on to a thread-pool. The size can be altered using properties on the process-engine configuration. So performance is based on pool-size and your machine
3. Scheduling of the timers is done in the JobExecutor itself. All jobs (including timers) are handled the same, aquired by the thread and handles by the thread-pool.

Re: How to shutdown process engine when Application Server shuts

ruedesilva — Wed, 07 Sep 2011 17:10:16 GMT

Thanks for the answers. But I still have these:

2) Can you indicate what the properties I need to set are? Note that I am building the process engine in code. So I would need the API calls.

3) What mechanism is used for scheduling/ Your own code? Or a third party product like Quartz?

thanks, in advance,
Rue

Re: How to shutdown process engine when Application Server shuts

ronald_van_kuij — Wed, 07 Sep 2011 17:34:25 GMT

3) Own, see the source, it is open

Re: How to shutdown process engine when Application Server shuts

frederikherema1 — Fri, 16 Sep 2011 08:55:26 GMT

Before starting the jobExecutor, you can set the properties (using Java) "maxPoolSize" and "corePoolSize".

Re: How to shutdown process engine when Application Server shuts

anand0210 — Wed, 25 May 2016 06:43:11 GMT

if we configure the below steps in Spring *.xml will it enough or do we need to be implement destory method even though it is already implemented in lib class.
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean" destroy-method="destroy">
<property name="processEngineConfiguration" ref="processEngineConfiguration" />
</bean>

testing: deploy in to server and run activity then shutdown server will this able to safe destroy?
please give me more details info along with examples on implementation.

Re: How to shutdown process engine when Application Server shuts

jbarrez — Tue, 31 May 2016 10:22:46 GMT

> please give me more details info along with examples on implementation.

I'm not sure if I'm understanding what your asking here .. are you asking whether it's safe to use it like that? If so, yes.

Re: How to shutdown process engine when Application Server shuts

anand0210 — Wed, 01 Jun 2016 09:05:42 GMT

I am asking
1) how to do implementation and testing? if any snippets or examples would help me to understand in detail.
2) how do we confirm it safe shutdown when the process is running state? should process completes its task or not?

I did below steps please correct me if i am wrong:
———————————————-
started Actviti flow then stop the server when actviti process completes few tasks and yet to do more tasks.
I noticed that activiti process stops immediately and show the status as IN PROGRESS for the current tasks.
I wanted to know whether it stops activiti engine after it updates status as COMPLETED?

please share more information on how activiti engine behaves when server shutdown.

Thanks
Anand

Re: How to shutdown process engine when Application Server shuts

jbarrez — Fri, 03 Jun 2016 07:55:03 GMT

This is all in the docs … but okay: Activiti uses database transactions. When your server shuts down, that transaction is either committed or not. In the latter case, it's rolled back and your activiti data is back to the previous stable state.

Re: How to shutdown process engine when Application Server shuts

anand0210 — Mon, 06 Jun 2016 05:10:48 GMT

Thanks