| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.activemq.util; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.activemq.Service; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A helper class used to stop a bunch of services, catching and logging any |
| * exceptions and then throwing the first exception when everything is stoped. |
| * |
| * |
| */ |
| public class ServiceStopper { |
| private Throwable firstException; |
| |
| /** |
| * Stops the given service, catching any exceptions that are thrown. |
| */ |
| public void stop(Service service) { |
| try { |
| if (service != null) { |
| service.stop(); |
| } |
| } catch (Exception e) { |
| onException(service, e); |
| } |
| } |
| |
| /** |
| * Performs the given code to stop some service handling the exceptions |
| * which may be thrown properly |
| */ |
| public void run(Callback stopClosure) { |
| try { |
| stopClosure.execute(); |
| } catch (Throwable e) { |
| onException(stopClosure, e); |
| } |
| } |
| |
| /** |
| * Stops a list of services |
| */ |
| public void stopServices(List services) { |
| for (Iterator iter = services.iterator(); iter.hasNext();) { |
| Service service = (Service)iter.next(); |
| stop(service); |
| } |
| } |
| |
| public void onException(Object owner, Throwable e) { |
| logError(owner, e); |
| if (firstException == null) { |
| firstException = e; |
| } |
| } |
| |
| /** |
| * Throws the first exception that was thrown if there was one. |
| */ |
| public void throwFirstException() throws Exception { |
| if (firstException != null) { |
| if (firstException instanceof Exception) { |
| Exception e = (Exception)firstException; |
| throw e; |
| } else if (firstException instanceof RuntimeException) { |
| RuntimeException e = (RuntimeException)firstException; |
| throw e; |
| } else { |
| throw new RuntimeException("Unknown type of exception: " + firstException, firstException); |
| } |
| } |
| } |
| |
| protected void logError(Object service, Throwable e) { |
| Logger log = LoggerFactory.getLogger(service.getClass()); |
| log.error("Could not stop service: " + service + ". Reason: " + e, e); |
| } |
| |
| } |