topic Re: Interflow Communication in Alfresco Archive

Interflow Communication

mikebrown01 — Tue, 14 Jan 2014 15:23:08 GMT

We have two flows that collaborate with each other. We have one process (Flow A) that progresses to a certain point and thenwaits for a message from Flow B. Flow B sends a message to Flow A and then waits for a message back from Flow A.An example is diagramed below.Flow A: Start ———————–>

Re: Interflow Communication

mikebrown01 — Tue, 14 Jan 2014 16:00:47 GMT

Here is a link to an image for the flow since I failed at formatting in the original post.

<img>
https://s3.amazonaws.com/stuff.virtualbrown.com/FlowCom.2jpg
</url>

Re: Interflow Communication

frederikherema1 — Wed, 15 Jan 2014 08:59:05 GMT

The main issue is that your processes do NOT get persisted until they reach a wait-state. Since you're using script-tasks, these well be executed synchronously and the actual commit will happen later on. You can try making the script-tasks asynchronous, so the process-state is persisted right before they are executed.

Another question I have is about the start of the processes. In what order are they started, and how are they started?

Re: Interflow Communication

mikebrown01 — Wed, 15 Jan 2014 15:13:22 GMT

"The main issue is that your processes do NOT get persisted until they reach a wait-state"

ok. I thought that might be the issue here.

"You can try making the script-tasks asynchronous, so the process-state is persisted right before they are executed."

ok. Will give this a try.

"Another question I have is about the start of the processes. In what order are they started, and how are they started?"

Flow A is started before Flow B. Both flows are started programatically using runtimeService.startProcessInstanceByKey(…);

Re: Interflow Communication

frederikherema1 — Wed, 15 Jan 2014 15:21:05 GMT

Any chance of using a single process with a sub-process/call-activity? This might make things a bit more stable, although not 100% this would fit in the usecase you're trying to reach.

Try the async suggestion. If that doesn't work, maybe a detailed explanation of your use case might help…

Re: Interflow Communication

mikebrown01 — Thu, 16 Jan 2014 14:20:04 GMT

Ok setting the Task as Async is working! I had a little bit of a problem getting it to work because the JobExecutor was turned off in the config file :0