byungwoojun [
http://community.jboss.org/people/byungwoojun] created the discussion
"Is there dynamic process instance flow monitoring?"
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http://community.jboss.org/message/612834#612834
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I am using jBPM 5.0 and started using jBPM 5.1. From the jBPM console, I can monitor
running process instances (e.g., start, signal, delete, terminate, diagram, instance
data). For a process flow with intermediate message event(s), I can see the process
instance from the console while it is waiting for the message event(s). However, for a
synchronous process flow (without any intermediate mesage event(s)), there is little (most
likely no) chance to monitor it. If the flow is successfully ended, the
processInstanceInfo and other associated tables will NOT have the record(s) - already
deleted when the procsss ended. The console server provides REST services, but many of the
service interfaces require process instance ids, which are available to outside (e.g.,
caller) after the StartProcess is done. So, I don't know how to monitor the
synchronous process flow. Even asychronous process flow monitoring seems to be pretty
static, to me.
I have a use case that I need to see (display) running process flow progress more
dynamically. For example, a process flow consists of 7 service tasks, and some of service
tasks take time (e.g., calling external services). I want to have a monitoring capability
showing where a process instance is running at(e.g., the 3rd service task is being
executed, then, the 4th, the 5th, so on).
To my knowledge, jBPM 5 flushes process instance data into database tables when a process
instance is ended, suspended or stopped at intermediate events. So, using the database
tables is not too promising for this. One thing I can think of is use of the
ProcessEventListener. I can use the before/afterProcessStarted, before/afterNodeTriggered
events, etc., for example, to store the process instance id, the running node names and
other data into a custom database tables. Then, by polling the database tables, a GUI
(either enhanced console) can display the real-time process status.
However, if there is built-in jBPM functionalities to support this use case, I'd like
to use them.
Any suggestions will be appreciated.
bwj
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