001 /** 002 * Copyright (c) 2010 Yahoo! Inc. All rights reserved. 003 * Licensed under the Apache License, Version 2.0 (the "License"); 004 * you may not use this file except in compliance with the License. 005 * You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software 010 * distributed under the License is distributed on an "AS IS" BASIS, 011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 * See the License for the specific language governing permissions and 013 * limitations under the License. See accompanying LICENSE file. 014 */ 015 package org.apache.oozie.servlet; 016 017 import org.apache.oozie.service.ServiceException; 018 import org.apache.oozie.service.Services; 019 020 import javax.servlet.ServletContextListener; 021 import javax.servlet.ServletContextEvent; 022 023 /** 024 * Webapp context listener that initializes Oozie {@link Services}. 025 */ 026 public class ServicesLoader implements ServletContextListener { 027 private static Services services; 028 029 /** 030 * Initialize Oozie services. 031 * 032 * @param event context event. 033 */ 034 public void contextInitialized(ServletContextEvent event) { 035 try { 036 services = new Services(); 037 services.init(); 038 } 039 catch (ServiceException ex) { 040 throw new RuntimeException(ex); 041 } 042 } 043 044 /** 045 * Destroy Oozie services. 046 * 047 * @param event context event. 048 */ 049 public void contextDestroyed(ServletContextEvent event) { 050 services.destroy(); 051 } 052 053 }