awsapi/src/com/cloud/bridge/lifecycle/ServiceEngineLifecycle.java

/*
 * Copyright (C) 2011 Citrix Systems, Inc.  All rights reserved.
 * 
 * Licensed 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.cloud.bridge.lifecycle;

import org.apache.axis2.context.ConfigurationContext;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.engine.ServiceLifeCycle;
import org.apache.log4j.Logger;

import com.cloud.bridge.persist.dao.UserCredentialsDao;
import com.cloud.bridge.service.controller.s3.ServiceProvider;


/**
 * @author Kelven Yang
 * ServiceEngineLifecycle is used to participate Axis service life cycle management
 * so that we can inject proper initialization and cleanup procedure into the 
 * process
 */
public class ServiceEngineLifecycle implements ServiceLifeCycle {
	private static final long serialVersionUID = -249114759030608486L;
	public static final Logger logger = Logger.getLogger(ServiceEngineLifecycle.class);
	private static boolean initialized = false;

	public void startUp(ConfigurationContext config, AxisService service) {
		// initialize service provider during Axis engine startup
	    try{
	        UserCredentialsDao.preCheckTableExistence();
	        ServiceProvider.getInstance();
	        ServiceEngineLifecycle.initialized = true;
	    }catch(Exception e){
	        logger.error("Error initializing awsapi: "+ e.getMessage());
	    }
	}
	
	public void shutDown(ConfigurationContext config, AxisService service) {
	    if(ServiceEngineLifecycle.initialized){
	        ServiceProvider.getInstance().shutdown();
	    }
	}
};