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/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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.alibaba.dubbo.container.spring;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.logger.Logger;
import com.alibaba.dubbo.common.logger.LoggerFactory;
import com.alibaba.dubbo.common.utils.ConfigUtils;
import com.alibaba.dubbo.container.Container;

/**
 * SpringContainer. (SPI, Singleton, ThreadSafe)
 * 
 * @author william.liangf
 */
public class SpringContainer implements Container {

    private static final Logger logger = LoggerFactory.getLogger(SpringContainer.class);

    public static final String SPRING_CONFIG = "dubbo.spring.config";
    
    public static final String DEFAULT_SPRING_CONFIG = "classpath*:META-INF/spring/*.xml";

    static ClassPathXmlApplicationContext context;
    
    public static ClassPathXmlApplicationContext getContext() {
		return context;
	}

	public void start() {
        String configPath = ConfigUtils.getProperty(SPRING_CONFIG);
        if (configPath == null || configPath.length() == 0) {
            configPath = DEFAULT_SPRING_CONFIG;
        }
        context = new ClassPathXmlApplicationContext(configPath.split("[,\\s]+"));
        context.start();
    }

    public void stop() {
        try {
            if (context != null) {
                context.stop();
                context.close();
                context = null;
            }
        } catch (Throwable e) {
            logger.error(e.getMessage(), e);
        }
    }

}