3 Replies Latest reply on Jan 11, 2011 5:23 PM by garyp

bpmtoesbvars and esbtobpmvars...

garyp Jan 11, 2011 11:14 AM

I'm using 5.0.2 of the SOA-P (and therefore jBPM3)

I have a workflow that calls an ESBActionHandler.. like this (yes the exception handler is missing):

<action name="action"

class="org.jboss.soa.esb.services.jbpm.actionhandlers.EsbActionHandler">

<esbCategoryName>GeneratePDFApplicationService</esbCategoryName>

<esbServiceName>GeneratePDFApplicationService</esbServiceName>

</bpmToEsbVars>

</esbToBpmVars>

</action>

</transition>

</node>

the GeneratePDFAccplicationService is an ESB Service that runs an XSLT and a custom FOP action.. The custom action adds a variable called pdffile to the body of the message.. like so:

message.getBody().add(this.attachmentName, baos.toByteArray());

I put in a couple of displays.. One in the custom ESB Action:

11:07:14,585 INFO [STDOUT] body variable names:

11:07:14,585 INFO [STDOUT] org.jboss.soa.esb.message.defaultEntry

11:07:14,585 INFO [STDOUT] masterCaseId

11:07:14,585 INFO [STDOUT] xslfo

11:07:14,585 INFO [STDOUT] pdffile

And we leave that node and go onto another node

11:07:21,536 INFO [STDOUT] this script is leaving node Node(create pdf)

11:07:21,545 INFO [STDOUT] this script is entering node Node(save pdf)

In this node I printed the BPM variables:

11:07:21,627 INFO [STDOUT] BPM variables:

11:07:21,627 INFO [STDOUT] message

11:07:21,627 INFO [STDOUT] jbpmProcessNodeVersionCounter21_27

11:07:21,627 INFO [STDOUT] masterCaseId

No variable called attachment.. So what happened to this:
<mapping esb="body.pdffile" bpm="attachment" />

I know the body.pdffile variable is there (as seen above).. Amd I referring to it wrong? is it not "body."???

thanks for the help!!!

Gary

1. bpmtoesbvars and esbtobpmvars...

mferguson Jan 11, 2011 2:57 PM (in response to garyp)

Don't think you need the "body." in the mapping. IIRC the ESB message body map is the implicit start point of the mapping's value lookup so:

<mapping esb="esbVar" bpm="bpmVar" />

Equates (very roughly) to:

processInstance.getContextInstance().setVariable("bpmVar", message.getBody().get("esbVar"));
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2. bpmtoesbvars and esbtobpmvars...

garyp Jan 11, 2011 3:47 PM (in response to mferguson)

that didn't work either.           I put a break point in one of my ESB actions..   and I noticed something odd..    So the BPM process uses ESBActionHandler and IIRC it waits for the response back from the ESB..

"The EsbActionHandler is designed to work as a reply-response type call into the Enterprise Service Bus. Attach it to the node. This is so that the action is called when the node is entered. The EsbActionHandler executes, leaving the node waiting for a transition signal, (which can come from any other thread of execution but will normally be sent by the JBossESB callback service.)"

The breakpoint gets hit and I didn't click the proceed.. so I would expect the BPM process to be hanging.. But my log messages from the process that it left the node appear after a second to two..

Am I reading this wrong? Also note that at this point the variable from esbToBpmVars is not set.. The next node in the BPM is a custom action and it displays the variables.. The "output" from the ESB action node is not present..

Thanks!!
Gary
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3. bpmtoesbvars and esbtobpmvars...

garyp Jan 11, 2011 5:23 PM (in response to garyp)

Ok.. so it works now.. the answer on the variable name was "body.pdffile".. just plain "pdffile" did not work.. Also the timeout was occurring too quickly.. Before the service ended so the variable was there as the next step started..

thanks!
Gary
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