RHPAM-4779: New event when Process Instance related data changes (#646)

Author: nmirasch

kie-api/src/main/java/org/kie/api/event/process/DefaultProcessEventListener.java

@@ -59,5 +59,8 @@ public void beforeProcessStarted(ProcessStartedEvent event) {
     public void beforeVariableChanged(ProcessVariableChangedEvent event) {
         // intentionally left blank
     }
+    public void onProcessDataChangedEvent(ProcessDataChangedEvent event) {
+        // intentionally left blank
+    }
 
 }

kie-api/src/main/java/org/kie/api/event/process/ProcessDataChangedEvent.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023 Red Hat, Inc. and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.kie.api.event.process;
+
+/**
+ * A runtime event that is generated when a ProcessInstance is completed.
+ */
+public interface ProcessDataChangedEvent
+    extends
+    ProcessEvent {
+
+}

kie-api/src/main/java/org/kie/api/event/process/ProcessEventListener.java

@@ -121,4 +121,11 @@ default void onMessage(MessageEvent event) {}
      * @param event
      */
     default void onAsyncNodeScheduledEvent(ProcessAsyncNodeScheduledEvent event) {}
+
+    /**
+     * This listener method is invoked when any process instance's data has been modified.
+     * @param event
+     */
+    default void onProcessDataChangedEvent(ProcessDataChangedEvent event) {}
 }
+