001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with 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.oozie.servlet; 019 020 import org.apache.oozie.service.Services; 021 022 import javax.servlet.ServletContextListener; 023 import javax.servlet.ServletContextEvent; 024 025 /** 026 * Webapp context listener that initializes Oozie {@link Services}. 027 */ 028 public class ServicesLoader implements ServletContextListener { 029 private static Services services; 030 031 /** 032 * Initialize Oozie services. 033 * 034 * @param event context event. 035 */ 036 public void contextInitialized(ServletContextEvent event) { 037 try { 038 services = new Services(); 039 services.init(); 040 } 041 catch (Throwable ex) { 042 System.out.println(); 043 System.out.println("ERROR: Oozie could not be started"); 044 System.out.println(); 045 System.out.println("REASON: " + ex.toString()); 046 System.out.println(); 047 System.out.println("Stacktrace:"); 048 System.out.println("-----------------------------------------------------------------"); 049 ex.printStackTrace(System.out); 050 System.out.println("-----------------------------------------------------------------"); 051 System.out.println(); 052 System.exit(1); 053 } 054 } 055 056 /** 057 * Destroy Oozie services. 058 * 059 * @param event context event. 060 */ 061 public void contextDestroyed(ServletContextEvent event) { 062 services.destroy(); 063 } 064 065 }