[jboss-user] [jBPM] - Get Activity Coordinates

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roxy1987

2013-01-04 22:12:18 UTC

roxy1987 [https://community.jboss.org/people/roxy1987] created the discussion

"Get Activity Coordinates"

To view the discussion, visit: https://community.jboss.org/message/787725#787725

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Hi,

In jBPM 4, we could use the RepositoryService to get the activity coordinates. Whats the API to achieve the same in jBPM 5?

Regards.
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roxy1987

2013-01-09 16:45:42 UTC

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Marcelo Zabalet

2013-01-09 19:05:09 UTC

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Marcelo Zabalet [https://community.jboss.org/people/zabalet] created the discussion

"Re: Get Activity Coordinates"

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Maybe there is a simple way, but here goes something:

This gives you the list of visited nodes (actuals and past)
List<NodeInstanceLog> nodeInstanceLogs = JPAProcessInstanceDbLog.findNodeInstances(new Long(processInstanceId));

Iterates and acquire Node objects
for (NodeInstanceLog nodeInstanceLog : nodeInstanceLogs) {
Â Â Â Node node = ((WorkflowProcess) process).getNode(Long.parseLong(nodeInstanceLog.getNodeId()));
Â Â Â // ie: this gives you x coordinate: node.getMetaData().get("x");
}

Hope this help.
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roxy1987

2013-01-09 19:35:03 UTC

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roxy1987

2013-01-09 20:00:13 UTC

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Marcelo Zabalet

2013-01-09 20:46:33 UTC

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roxy1987

2013-01-09 21:49:24 UTC

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Marcelo Zabalet

2013-01-10 15:28:47 UTC

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roxy1987

2013-01-10 16:04:16 UTC

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roxy1987

2013-01-10 17:54:18 UTC

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roxy1987 [https://community.jboss.org/people/roxy1987] created the discussion

"Re: Get Activity Coordinates"

To view the discussion, visit: https://community.jboss.org/message/790167#790167

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Okay so I tried the code and it gave me a class cast exception. Then I tried your previous code, it seems to be giving me the coordinates but not exactly in a way I need them.

I have got a process with a start node, 3 human task nodes, and an end node. So total of 5 nodes.

Out of the 3 human task nodes, I have completed 1 human task. It is at 2nd human task.

The code returned me 5 nodes. But the first 2 nodes returned are both start nodes, next 2 are both of first human task and 5th node is of second human task. Even in the db I have 5 nodes. I am not sure if thats how the information is logged or if this is a bug.

But what I am looking for is the coordinate of just the second human task since the process is pending at it.

But at least I am getting the coordinates now thanks to you. I am gonna try to figure out the problem/logic. If you already know then you are most welcome to share. Thanks.
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Marcelo Zabalet

2013-01-10 18:04:42 UTC

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Marcelo Zabalet [https://community.jboss.org/people/zabalet] created the discussion

"Re: Get Activity Coordinates"

To view the discussion, visit: https://community.jboss.org/message/790170#790170

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Taht's because it logs the enter and the exit, so, usually, when a process instance ends, you end up with to registers per node. The NodeInstanceLog object has a type attribute. You could use it to determine if you are "in" the node or you just "passed" the node. If you have ENTER but not EXIT, you are in.

nodeInstanceLog.getType() == NodeInstanceLog.NodeInstanceLog.TYPE_ENTER

nodeInstanceLog.getType() == NodeInstanceLog.NodeInstanceLog.TYPE_EXIT

Hope this help.
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roxy1987

2013-01-10 19:17:46 UTC

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Marcelo Zabalet

2013-01-10 19:22:00 UTC

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roxy1987

2013-01-10 20:11:46 UTC

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roxy1987 [https://community.jboss.org/people/roxy1987] created the discussion

"Re: Get Activity Coordinates"

To view the discussion, visit: https://community.jboss.org/message/790204#790204

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Great. It is working now.
I mixed your two code frags to get the currently active task. Becuase the previous code gives me both type 0 and type 1 nodes and the other code gives me all the nodes of the process. So I am checking if a node has both type 0 and type 1 then it has definitely been completed. Otherwise it is pending. Btw. I am hoping that there are only 2 types for a task. Enter and Exit.

List<NodeInstanceLog> nodeInstanceLogList;

**for** (Node node : (Node[]) ((WorkflowProcessImpl) process).getNodes()){
nodeInstanceLogList = JPAProcessInstanceDbLog.+findNodeInstances+(Long.+parseLong+(processInstanceId),

**new** Long(node.getId()).toString());

**if**(nodeInstanceLogList.size() == 1){

coordinates.add(node.getMetaData().get(
"height"));coordinates.add(node.getMetaData().get(

"width"));}
}

ï»¿
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