example紹介- Event listener
というプロセスがありまして、jPDLソースで以下のように書きます
<process name="EventListener" xmlns="http://jbpm.org/4.0/jpdl"> <on event="start"> <event-listener class="org.jbpm.examples.eventlistener.LogListener"> <field name="msg"><string value="start on process definition"/></field> </event-listener> </on> <start g="17,19,48,48"> <transition to="wait"/> </start> <state name="wait" g="96,16,104,52"> <on event="start"> <event-listener class="org.jbpm.examples.eventlistener.LogListener"> <field name="msg"><string value="start on activity wait"/></field> </event-listener> </on> <on event="end"> <event-listener class="org.jbpm.examples.eventlistener.LogListener"> <field name="msg"><string value="end on activity wait"/></field> </event-listener> </on> <transition to="park"> <event-listener class="org.jbpm.examples.eventlistener.LogListener"> <field name="msg"><string value="take transition"/></field> </event-listener> </transition> </state> <state name="park" g="231,19,80,52"/> </process>
で、LogListenerの実装は以下の通り
public class LogListener implements EventListener { String msg; public void notify(EventListenerExecution execution) { List<String> logs = (List<String>) execution.getVariable("logs"); if (logs==null) { logs = new ArrayList<String>(); execution.setVariable("logs", logs); } logs.add(msg); execution.setVariable("logs", logs); } }