Java tutorial
/* * 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 com.glaf.mail; import org.apache.commons.lang3.StringUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.glaf.core.config.CustomProperties; import com.glaf.core.config.SystemProperties; public class MailFactory { protected static final Log logger = LogFactory.getLog(MailFactory.class); private static ClassPathXmlApplicationContext ctx; private final static String DEFAULT_CONFIG = "com/glaf/core/mail/mail-spring-context.xml"; public synchronized static Object getBean(Object key) { if (ctx == null) { ctx = reload(); } return ctx.getBean((String) key); } public synchronized static ClassPathXmlApplicationContext reload() { if (ctx != null) { ctx.close(); ctx = null; } String configLocation = CustomProperties.getString("mail.context"); if (StringUtils.isEmpty(configLocation)) { configLocation = SystemProperties.getString("mail.context"); } if (StringUtils.isEmpty(configLocation)) { configLocation = DEFAULT_CONFIG; } ctx = new ClassPathXmlApplicationContext(configLocation); logger.debug("start spring ioc from: " + configLocation); return ctx; } }