February 2009 - jbpm-dev - Jboss List Archives

[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by camunda

Okay, I asked a colleage which really knows about multi-threading. Tom, Joram and Ronald are right, it is no problem. But it is true still that it puts higher requirements on your ActionHandlers (no member fields)... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211509#4211509 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211509

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[Design of JBoss jBPM] - Re: From where can I start in jbpm ? (Design phase)

by kukeltje

2 things: - Wrong forum (you should use the user forum) - You probably won't get an answer there since it is so generic and almost asks other users to do your work... My answer would be: play with jBPM a little, read some docs, try examples etc.. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211508#4211508 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211508

15 years, 9 months

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by kukeltje

I was under the impression that if you do not use member fields but only variables local to a method, there is no problem (that is what Joram says) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211506#4211506 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211506

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[Design of JBoss jBPM] - From where can I start in jbpm ? (Design phase)

by target

Hello, I will develop an application and I m new in jbpm...How can I start in design phase.. I have my database so how can I extract, in a methodic way, the processes of my application.. Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211493#4211493 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211493

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by camunda

Exactly... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211451#4211451 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211451

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by roschmel

If the handlers are reused, I also think they should be used in a pool. Because if you use the same handler object in multiple threads at the same time, the componentes you delegate to must also be thread safe. This can get a llittle bit tricky. I am also quite sure that introducing resue of handler object will NOT be backward compatible to a lot of handlers implemented out there. For example we are using members of the handler in abstract base implementations to prefetch some data objects for later use in more complex handlers (I konw that implementation inheritance is not considererd good design....). So if you want backward compatible it must be configurable to use pools or not. I am against using handler objects multithreaded because its makes coding much harder. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211447#4211447 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211447

15 years, 9 months

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by camunda

Yeah, but not the same object for two requests at the same time, that's why the have a pool or Servlets or Beans... Or am I totally wrong here? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211446#4211446 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211446

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by jbarrez

Not if they're stateless. App servers for example use the same object (eg a servlet) many many times for several requests View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211445#4211445 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211445

15 years, 9 months

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[Design of JBoss jBPM] - Re: statefull vs stateless delegation classes

by camunda

Tom wrote : | why ? if they're stateless, i don't see the point. then all threads can use the same delegation object, no ? | I am not an expert in Multi-Threading, but multiple threads using the same object with the same method at the same time - doesn't this make problems? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211431#4211431 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211431

15 years, 9 months

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[Design of JBoss jBPM] - Re: process resume

by galanfish

assue that i want to build a simple workflow with simple language definition on top of pvm, and i want the workflow could have this feature: when a activity execute failed, the process instance could persist, and users could see the failed process instance and decide whther to resume, if the user decide to resume, i except that the process could restart from the failed activity to redo it. is the current pvm support this and developers could just easily to achieve the goals? to meet this demand, how can i do it? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211307#4211307 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4211307

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jbpm-dev February 2009