topic Re: How about the process execution mechanism in Alfresco Archive

How about the process execution mechanism

lifejoice — Wed, 20 Jul 2011 02:23:05 GMT

I am studying activiti 5.6, and have some doubt about it. Can anyone tell me?1. I define a process in Eclipse, and generate a bpmn xml file. I deploy to DB, it will insert a record in ACT_RE_DEPLOYMENT table.But I want to know if each time the process flow to next task, the ACTIVITI ENGINE will extr

Re: How about the process execution mechanism

ronald_van_kuij — Wed, 20 Jul 2011 07:09:10 GMT

1: no, it is parsed deploytime
2: the _RU (runtime) and _HI (history) tables contain similar information.

Re: How about the process execution mechanism

lifejoice — Wed, 20 Jul 2011 10:03:15 GMT

thanks ronald.van.kuijk. Ask some more questions.

1. I see the source code, and it looks like that the ENGINE will save the bpmn20.xml file in ACT_GE_BYTEARRAY as byte, is it?
2. The ENGINE also will save the process definition picture in ACT_GE_BYTEARRAY as byte, is it?
3. Is it use the DeploymentCache to cache the deployment?

Re: How about the process execution mechanism

franklin — Thu, 21 Jul 2011 19:09:34 GMT

Hi lifejoice, you're right!

1. I see the source code, and it looks like that the ENGINE will save the bpmn20.xml file in ACT_GE_BYTEARRAY as byte, is it?
2. The ENGINE also will save the process definition picture in ACT_GE_BYTEARRAY as byte, is it?

There are always two rows on this table per deployment.

3. Is it use the DeploymentCache to cache the deployment?

Yes, you're right again. There is a cache inside this class.

Precissely by this attribute:
protected Map<String, ProcessDefinitionEntity> processDefinitionCache = new HashMap<String, ProcessDefinitionEntity>();

Re: How about the process execution mechanism

lifejoice — Thu, 28 Jul 2011 02:48:47 GMT

hello, FrankLin:

Thanks for your reply. It's useful.