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feat(engine): support composite incident handlers
* adds new engine flag for enabling composite incident handlers so multiple incident handlers can be triggered for the same type related to CAM-13569 closes camunda#1561
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engine/src/main/java/org/camunda/bpm/engine/impl/incident/CompositeIncidentHandler.java
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| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH | ||
| * under one or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information regarding copyright | ||
| * ownership. Camunda licenses this file to you under the Apache License, | ||
| * Version 2.0; 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.camunda.bpm.engine.impl.incident; | ||
|
|
||
| import org.camunda.bpm.engine.ProcessEngineException; | ||
| import org.camunda.bpm.engine.impl.util.EnsureUtil; | ||
| import org.camunda.bpm.engine.runtime.Incident; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.List; | ||
|
|
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| /** | ||
| * <p> | ||
| * A composite incident handler that handles incidents of a certain type by the multiple handlers. | ||
| * The result of handling depends on main handler. | ||
| * | ||
| * @see #mainIncidentHandler | ||
| * </p> | ||
| * @see IncidentHandler | ||
| */ | ||
| public class CompositeIncidentHandler implements IncidentHandler { | ||
|
|
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| protected IncidentHandler mainIncidentHandler; | ||
| protected final List<IncidentHandler> incidentHandlers = new ArrayList<>(); | ||
|
|
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| /** | ||
| * Constructor that takes a list of {@link IncidentHandler} that consume | ||
| * the incident. | ||
| * | ||
| * @param mainIncidentHandler the main incident handler {@link IncidentHandler} that consume the incident and return result. | ||
| * @param incidentHandlers the list of {@link IncidentHandler} that consume the incident. | ||
| */ | ||
| public CompositeIncidentHandler(IncidentHandler mainIncidentHandler, final List<IncidentHandler> incidentHandlers) { | ||
| initializeIncidentsHandlers(mainIncidentHandler, incidentHandlers); | ||
| } | ||
|
|
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| /** | ||
| * Constructor that takes a varargs parameter {@link IncidentHandler} that | ||
| * consume the incident. | ||
| * | ||
| * @param mainIncidentHandler the main incident handler {@link IncidentHandler} that consume the incident and return result. | ||
| * @param incidentHandlers the list of {@link IncidentHandler} that consume the incident. | ||
| */ | ||
| public CompositeIncidentHandler(IncidentHandler mainIncidentHandler, final IncidentHandler... incidentHandlers) { | ||
| EnsureUtil.ensureNotNull("Incident handlers", (Object[]) incidentHandlers); | ||
| initializeIncidentsHandlers(mainIncidentHandler, Arrays.asList(incidentHandlers)); | ||
| } | ||
|
|
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| /** | ||
| * Initialize {@link #incidentHandlers} with data transfered from constructor | ||
| * | ||
| * @param incidentHandlers | ||
| */ | ||
| protected void initializeIncidentsHandlers(IncidentHandler mainIncidentHandler, | ||
| final List<IncidentHandler> incidentHandlers) { | ||
| EnsureUtil.ensureNotNull("Incident handler", mainIncidentHandler); | ||
| this.mainIncidentHandler = mainIncidentHandler; | ||
|
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| EnsureUtil.ensureNotNull("Incident handlers", incidentHandlers); | ||
| for (IncidentHandler incidentHandler : incidentHandlers) { | ||
| add(incidentHandler); | ||
| } | ||
| } | ||
|
|
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| /** | ||
| * Adds the {@link IncidentHandler} to the list of | ||
| * {@link IncidentHandler} that consume the incident. | ||
| * | ||
| * @param incidentHandler the {@link IncidentHandler} that consume the incident. | ||
| */ | ||
| public void add(final IncidentHandler incidentHandler) { | ||
| EnsureUtil.ensureNotNull("Incident handler", incidentHandler); | ||
| String incidentHandlerType = getIncidentHandlerType(); | ||
| if (!incidentHandlerType.equals(incidentHandler.getIncidentHandlerType())) { | ||
| throw new ProcessEngineException( | ||
| "Incorrect incident type handler in composite handler with type: " + incidentHandlerType); | ||
| } | ||
| this.incidentHandlers.add(incidentHandler); | ||
| } | ||
|
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| @Override | ||
| public String getIncidentHandlerType() { | ||
| return mainIncidentHandler.getIncidentHandlerType(); | ||
| } | ||
|
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| @Override | ||
| public Incident handleIncident(IncidentContext context, String message) { | ||
| Incident incident = mainIncidentHandler.handleIncident(context, message); | ||
| for (IncidentHandler incidentHandler : this.incidentHandlers) { | ||
| incidentHandler.handleIncident(context, message); | ||
| } | ||
| return incident; | ||
| } | ||
|
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| @Override | ||
| public void resolveIncident(IncidentContext context) { | ||
| mainIncidentHandler.resolveIncident(context); | ||
| for (IncidentHandler incidentHandler : this.incidentHandlers) { | ||
| incidentHandler.resolveIncident(context); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void deleteIncident(IncidentContext context) { | ||
| mainIncidentHandler.deleteIncident(context); | ||
| for (IncidentHandler incidentHandler : this.incidentHandlers) { | ||
| incidentHandler.deleteIncident(context); | ||
| } | ||
| } | ||
| } |
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