Registering a custom process event listener in jBPM or BPM Suite
source link: http://fxapps.blogspot.com/2017/02/registering-custom-process-event.html
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Registering a custom process event listener in jBPM or BPM Suite
Two Steps are required to use a custom process event listener in jBPM 6.5 or BPM Suite 6.4:
1) Create the class that implements org.kie.api.event.process.ProcessEventListener . This class can be in your BPM Suite project or in a separated dependency. In any case you will need the org.jbpm:jbpm-flow:6.5.0.Final maven dependency in your project. If you use a separated maven project with your process event listener, make sure to add it as a dependency;
2) Register the custom listener in kie-deployment-descriptor.xml on the "Event Listeners" sections and use the full qualified class name and the resolver as reflection.
Now if you execute a process your process event listener methods should be called. For example, I have the following simple test processes:
And in my process event listener I did override the before node triggered method to print the node name, so when I execute the business process I see the following in console:
See the code for a simple process listener and you can find also in my github.
package org.example;
import org.kie.api.event.process.ProcessCompletedEvent; import org.kie.api.event.process.ProcessEventListener; import org.kie.api.event.process.ProcessNodeLeftEvent; import org.kie.api.event.process.ProcessNodeTriggeredEvent; import org.kie.api.event.process.ProcessStartedEvent; import org.kie.api.event.process.ProcessVariableChangedEvent;
public class CustomProcessEventListener implements ProcessEventListener {
public void beforeProcessStarted(ProcessStartedEvent event) { }
public void afterProcessStarted(ProcessStartedEvent event) { }
public void beforeProcessCompleted(ProcessCompletedEvent event) { }
public void afterProcessCompleted(ProcessCompletedEvent event) { }
public void beforeNodeTriggered(ProcessNodeTriggeredEvent event) { System.out.println("Before Node triggered: " + event.getNodeInstance().getNodeName());
}
public void afterNodeTriggered(ProcessNodeTriggeredEvent event) { }
public void beforeNodeLeft(ProcessNodeLeftEvent event) { }
public void afterNodeLeft(ProcessNodeLeftEvent event) { }
public void beforeVariableChanged(ProcessVariableChangedEvent event) { }
public void afterVariableChanged(ProcessVariableChangedEvent event) { }
}
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <deployment-descriptor xsi:schemaLocation="http://www.jboss.org/jbpm deployment-descriptor.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <persistence-unit>org.jbpm.domain</persistence-unit> <audit-persistence-unit>org.jbpm.domain</audit-persistence-unit> <audit-mode>JPA</audit-mode> <persistence-mode>JPA</persistence-mode> <runtime-strategy>SINGLETON</runtime-strategy> <marshalling-strategies/> <event-listeners> <event-listener> <resolver>reflection</resolver> <identifier>org.example.CustomProcessEventListener</identifier> <parameters/> </event-listener> </event-listeners> <task-event-listeners/> <globals/> <work-item-handlers> <work-item-handler> <resolver>mvel</resolver> <identifier>new org.jbpm.process.instance.impl.demo.SystemOutWorkItemHandler()</identifier> <parameters/> <name>Log</name> </work-item-handler> <work-item-handler> <resolver>mvel</resolver> <identifier>new org.jbpm.process.workitem.bpmn2.ServiceTaskHandler(ksession, classLoader)</identifier> <parameters/> <name>Service Task</name> </work-item-handler> <work-item-handler> <resolver>mvel</resolver> <identifier>new org.jbpm.process.workitem.webservice.WebServiceWorkItemHandler(ksession, classLoader)</identifier> <parameters/> <name>WebService</name> </work-item-handler> <work-item-handler> <resolver>mvel</resolver> <identifier>new org.jbpm.process.workitem.rest.RESTWorkItemHandler(classLoader)</identifier> <parameters/> <name>Rest</name> </work-item-handler> </work-item-handlers> <environment-entries/> <configurations/> <required-roles/> <remoteable-classes/> <limit-serialization-classes>true</limit-serialization-classes> </deployment-descriptor>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>simple-process-event-listener</artifactId> <version>1.0</version> <dependencies> <dependency> <groupId>org.jbpm</groupId> <artifactId>jbpm-flow</artifactId> <version>6.5.0.Final</version> <scope>provided</scope> </dependency> </dependencies> </project>
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