001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.util; 018 019 import java.util.Collection; 020 021 import org.apache.camel.Service; 022 import org.apache.commons.logging.Log; 023 import org.apache.commons.logging.LogFactory; 024 025 /** 026 * A collection of helper methods for working with {@link Service} objects 027 * 028 * @version $Revision: 382 $ 029 */ 030 public final class ServiceHelper { 031 private static final transient Log LOG = LogFactory.getLog(ServiceHelper.class); 032 033 /** 034 * Utility classes should not have a public constructor. 035 */ 036 private ServiceHelper() { 037 } 038 039 public static void startService(Object value) throws Exception { 040 if (value instanceof Service) { 041 Service service = (Service)value; 042 service.start(); 043 } else if (value instanceof Collection) { 044 startServices((Collection)value); 045 } 046 } 047 048 /** 049 * Starts all of the given services 050 */ 051 public static void startServices(Object... services) throws Exception { 052 for (Object value : services) { 053 startService(value); 054 } 055 } 056 057 /** 058 * Starts all of the given services 059 */ 060 public static void startServices(Collection services) throws Exception { 061 for (Object value : services) { 062 if (value instanceof Service) { 063 Service service = (Service)value; 064 service.start(); 065 } 066 } 067 } 068 069 /** 070 * Stops all of the given services, throwing the first exception caught 071 */ 072 public static void stopServices(Object... services) throws Exception { 073 Exception firstException = null; 074 for (Object value : services) { 075 if (value instanceof Service) { 076 Service service = (Service)value; 077 try { 078 service.stop(); 079 } catch (Exception e) { 080 LOG.debug("Caught exception shutting down: " + e, e); 081 if (firstException == null) { 082 firstException = e; 083 } 084 } 085 } 086 } 087 if (firstException != null) { 088 throw firstException; 089 } 090 } 091 092 public static void stopService(Object value) throws Exception { 093 if (value instanceof Service) { 094 Service service = (Service)value; 095 service.stop(); 096 } else if (value instanceof Collection) { 097 stopServices((Collection)value); 098 } 099 } 100 101 /** 102 * Stops all of the given services, throwing the first exception caught 103 */ 104 public static void stopServices(Collection services) throws Exception { 105 Exception firstException = null; 106 for (Object value : services) { 107 if (value instanceof Service) { 108 Service service = (Service)value; 109 try { 110 service.stop(); 111 } catch (Exception e) { 112 LOG.debug("Caught exception shutting down: " + e, e); 113 if (firstException == null) { 114 firstException = e; 115 } 116 } 117 } 118 } 119 if (firstException != null) { 120 throw firstException; 121 } 122 } 123 }