JBPM 4.0 HistoryEvent, HistorySession

[tcr]

Hi,

we need to send emails and log information upon certain events (e.g a reassignment or change of priority).

All this is available as history events, so we thought implementing a custom history session and add this to the jbpm-config. As it turns out the history events do not expose their information (e.g. the execution they were fired from).

Is there a way to get the execution from a history event in a custom event session? Would it be possible to add a method getExecution into HistoryEvent in the next release, or did I miss something?

example:

package com.test;

import org.jbpm.pvm.internal.history.HistoryEvent;
import org.jbpm.pvm.internal.history.HistorySession;
import org.jbpm.pvm.internal.history.events.TaskAssign;

public class NotificationListener implements HistorySession {
 public void process(HistoryEvent historyEvent) {

 if (historyEvent instanceof TaskAssign) {
 //User Assigned!
 TaskAssign taskAssign = (TaskAssign) historyEvent;

 //Nothing to get from taskAssign
 //Nothing visible from this package
 }
 }
}

[tcr]

Addition:
I wasn't able to find a binding for HistorySessionChain. I created one (see below).

Maybe some hints for all who want to add a custom historySession....

Steps:

- Create your custom history Session (implement org.jbpm.pvm.internal.history.HistorySession)
- Create the binding class for the custom history session (you can copy the binding from historySession and adjust tag and class)
- Create the binding class for the historySessionChain (see below)
- Add both bindings to jbpm.wire.bindings.xml
- Change your configuration by adding the chain-tag including the actual history sessions.

Last problem I have:
Can anyone see an option to get the of the execution memeber of the history-events in the custom event session without changing the code?


Regards
Torsten


CustomHistorySession.java

package com.test;

public class CustomHistorySession implements HistorySession {
 public void process(HistoryEvent historyEvent) {
 // Do your custom work here
 }
}

CustomHistorySessionBinding.java

package com.test;
public class CustomHistorySessionBinding extends WireDescriptorBinding {

 public CustomHistorySessionBinding() {
 super("custom-history-session");
 }

 public Object parse(Element element, Parse parse, Parser parser) {
 return new ObjectDescriptor(CustomHistorySession.class);
 }
}

HistorySessionChainBinding.java (copy and modify from deployer-manager)

package com.test;

public class HistorySessionChainBinding extends WireDescriptorBinding {

 private static final String HISTORY_SESSION_CHAIN_TAG = "history-session-chain";

 public HistorySessionChainBinding() {
 super(HISTORY_SESSION_CHAIN_TAG);
 }

 public Object parse(Element element, Parse parse, Parser parser) {
 ObjectDescriptor objectDescriptor = new ObjectDescriptor(HistorySessionChain.class);

 ListBinding listBinding = new ListBinding();
 ListDescriptor listDescriptor = (ListDescriptor) listBinding.parse(element, parse, parser);
 objectDescriptor.addInjection("delegates", listDescriptor);

 return objectDescriptor;
 }
}

jbpm.wire.bindings.xml

<binding class="org.jbpm.pvm.internal.wire.binding.HistorySessionBinding" />
 <binding class="com.test.HistorySessionChainBinding" />
 <binding class="com.test.CustomHistorySessionBinding" />

jbpm.cfg.xml

<transaction-context>
[...]
 <history-session-chain >
 <history-session />
 <custom-history-session />
 </history-session-chain>
[...]
</transaction-context>

[sirfrancisdrake]

Hi tcr,
do you have found a solution for your problem ?
or does anybody else have a solution for this problem.

i would also like to use a customized history event for tracking and some informational tasks.

regards
SirFrancis