[jBPM 4] Mai templates context variables

[gleenders]

In jBPM 3 it was possible to use some context variables in EL (for ex. taskInstance & processInstance).
It seems to be that this doesn't work in jBPM4?

Gert

[tejjbpm]

I dont see why it should not..how r u accessing the variables? Could you explain with some example?

[gleenders]

Template:

<?xml version="1.0" encoding="UTF-8"?>

<jbpm-configuration>

 <process-engine-context>

 <mail-template name="task-notification">
 <to addresses="[e-mail]" />
 <subject>Assignment notification</subject>
 <text>Task #{taskInstance.name} is assigned</text>
 </mail-template>

 </process-engine-context>

</jbpm-configuration>

Stacktrace:

INFO: exception while executing command org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd@5b52f1
org.jbpm.api.JbpmException: script evaluation error: javax.el.PropertyNotFoundException: Cannot find property taskInstance
 at org.jbpm.pvm.internal.script.ScriptManager.evaluate(ScriptManager.java:118)
 at org.jbpm.pvm.internal.script.ScriptManager.evaluate(ScriptManager.java:106)
 at org.jbpm.pvm.internal.script.ScriptManager.evaluateExpression(ScriptManager.java:78)
 at org.jbpm.pvm.internal.email.impl.MailProducerImpl.evaluateExpression(MailProducerImpl.java:137)
 at org.jbpm.pvm.internal.email.impl.MailProducerImpl.fillContent(MailProducerImpl.java:301)
 at org.jbpm.pvm.internal.email.impl.MailProducerImpl.produce(MailProducerImpl.java:81)

[tejjbpm]

There are few problems:

1. Firstly the template named "task-assign" will be called you set notify="yes" in your task node. Only this template has access to #{taskInstance.name} not your custom template.
2. If you want to use a custom template then you got to set the event as "task-assign" inside your

For example:
<event type="task-assign"> <mail name="mailtest" to="[e-mail]">
 <subject>Hello, there</subject>
 <text>Task instance name #{taskInstance.name} </text>
</mail>
</event>

[gleenders]

I'm aware that I'm using the "task-assign" template and indeed i have set notify to 'yes'. Everything works fine except for the taskInstance variable. For the moment I'm not trying to make a custom template.

[tejjbpm]

You did not get what I said. In the example you gave the name of your custom template as "task-notification". If you change that name to "task-assign" your taskinstance.name variable will work.

You are using custom template by changing the name of the template to "task-notification". The only system templates are "task-assign" and "task-reminder" which are by default present in jbpm.mail.templates. Whatever variables you want will work only under these two "SYSTEM DEFINED TEMPLATES"

[kukeltje]

@Gert
See my response to TejBPM below

@TejBPM
It has nothing to do with the templates, it has to do with the executionContext you are in. If you have a mail *node* like Gert initially had, there is no task instances there in the context. If you have an eventhandler and the event is task-assign, there *is* (afaik) a taskInstance in the execution context.

[tejjbpm]

That is what I said Ronald. If he is using a custom template in the mail node he cannot access it . He has to change it to task-assign event to get the handle of it and I gave a code sample of how to achieve it!!!!

[kukeltje]

Ok, then it might have been the way you said it (and do it again now) that I tried to correct your statement (you were right about using an event instead of node)

And to make it 100% clear now, it has nothing to do with 'using a custom template in a mailnode' it has to do with 'using a mailnode' ;-)

[gleenders]

Ok, I think a get the picture but i still have some problems.
First be aware that i'm using jBPM 4.

@TejJBPM:

The only system templates are "task-assign" and "task-reminder" which are by default present in jbpm.mail.templates. Whatever variables you want will work only under these two "SYSTEM DEFINED TEMPLATES"

the current manual descibes the following:
Table 6.15. task elements
Element Multiplicity Description
notification 0..1 Sends a notification message when a task is assigned. If no template is referenced or supplied inline, mail support falls back on the template named task-notification.
reminder 0..1 Sends a reminder message at specific intervals. If no template is referenced or supplied inline, mail support falls back on the template named task-reminder

So when i use the following

<task duedate="10 seconds" g="36,108,97,52" name="Visa Conseiller">
 <assignment-handler class="be.axi.bpm.handlers.TaskAssignmentHandler"/>
 <notification/>
 <reminder duedate="15 seconds"/>
 <transition g="-76,-12" name="to Inspection" to="Inspection"/>
</task>

<mail-template name="task-notification">
 <to addresses="[e-mail]" />
 <subject>Assignment notification</subject>
 <text>Task #{taskInstance.name} is assigned</text>
 </mail-template>

I assume that task-notification is a system template since i don't point to a specified template name (and regarding the manual).
This example works fine except for the context variables.

But i also tried the implementation you describe above i think the code you supplied above is from version 3
This is how my code look:

<task duedate="10 seconds" g="36,108,97,52" name="Visa Conseiller">
 <assignment-handler class="be.axi.bpm.handlers.TaskAssignmentHandler"/>
 <on event="task-assign"><mail template="mail-task-assign"></mail></on>
 <reminder duedate="15 seconds"/>
 <transition g="-76,-12" name="to Inspection" to="Inspection"/>
 </task>

<mail-template name="mail-task-assign">
 <to addresses="[e-mail]" />
 <subject>Assignment notification (E-C)</subject>
 <text>Task assigned</text>
 </mail-template>

But this code does noting at all (even not an Error msg). Is this event still supported in jBPM 4?

Regards,
Gert

[swatis]

use just wild guess....:)

[swatis]

sorry msg didnot come properly
use

<on event="task-notification">

just wild guess....:)

[tejjbpm]

event type "task-notification" should work. In jbpm 4 "task-assign" is replaced with "task-notification" template.

[kukeltje]

I'm not 100% sure a mail element can be nested in a 'on' element in 4. But why not use the notify element with a template attribute?

[gleenders]

Now we're back where we started :-) .... those silly loops....

My initial try was this

<task duedate="10 seconds" g="36,108,97,52" name="Visa Conseiller">
 <assignment-handler class="be.axi.bpm.handlers.TaskAssignmentHandler"/>
 <notification/>
 <reminder duedate="15 seconds"/>
 <transition g="-76,-12" name="to Inspection" to="Inspection"/>
</task>

<mail-template name="task-notification">
 <to addresses="[e-mail]" />
 <subject>Assignment notification (E)</subject>
 <text>Task assigned</text>
</mail-template>

And this works fine except for the context variables, so my question rests the same....