001 /**
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one or more
004 * contributor license agreements. See the NOTICE file distributed with
005 * this work for additional information regarding copyright ownership.
006 * The ASF licenses this file to You under the Apache License, Version 2.0
007 * (the "License"); you may not use this file except in compliance with
008 * the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018 package org.apache.camel.util;
019
020 import org.apache.camel.Service;
021 import org.apache.commons.logging.Log;
022 import org.apache.commons.logging.LogFactory;
023
024 import java.util.Collection;
025
026 /**
027 * A collection of helper methods for working with {@link Service} objects
028 *
029 * @version $Revision: 550575 $
030 */
031 public class ServiceHelper {
032 private static final transient Log log = LogFactory.getLog(ServiceHelper.class);
033
034
035 /**
036 * Starts all of the given services
037 */
038 public static void startServices(Object... services) throws Exception {
039 for (Object value : services) {
040 startService(value);
041 }
042 }
043
044 /**
045 * Starts all of the given services
046 */
047 public static void startServices(Collection services) throws Exception {
048 for (Object value : services) {
049 if (value instanceof Service) {
050 Service service = (Service) value;
051 service.start();
052 }
053 }
054 }
055
056 public static void startService(Object value) throws Exception {
057 if (value instanceof Service) {
058 Service service = (Service) value;
059 service.start();
060 }
061 else if (value instanceof Collection) {
062 startServices((Collection) value);
063 }
064 }
065
066 /**
067 * Stops all of the given services, throwing the first exception caught
068 */
069 public static void stopServices(Object... services) throws Exception {
070 Exception firstException = null;
071 for (Object value : services) {
072 if (value instanceof Service) {
073 Service service = (Service) value;
074 try {
075 service.stop();
076 }
077 catch (Exception e) {
078 log.debug("Caught exception shutting down: " + e, e);
079 if (firstException == null) {
080 firstException = e;
081 }
082 }
083 }
084 }
085 if (firstException != null) {
086 throw firstException;
087 }
088 }
089 /**
090 * Stops all of the given services, throwing the first exception caught
091 */
092 public static void stopServices(Collection services) throws Exception {
093 Exception firstException = null;
094 for (Object value : services) {
095 if (value instanceof Service) {
096 Service service = (Service) value;
097 try {
098 service.stop();
099 }
100 catch (Exception e) {
101 log.debug("Caught exception shutting down: " + e, e);
102 if (firstException == null) {
103 firstException = e;
104 }
105 }
106 }
107 }
108 if (firstException != null) {
109 throw firstException;
110 }
111 }
112 }