com.netliard.SpringHook.java Source code

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Here is the source code for com.netliard.SpringHook.java

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/**
 * Copyright 2011 liard
 *
 * 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.netliard;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import com.netliard.activemq.transport.discovery.database.JDBCAdapter;

/**
 * Singleton to get Sring Application Context outside a Bean.
 * 
 * @author Samuel Liard
 * 
 */
public class SpringHook implements ApplicationContextAware {
    /**
     * Logger.
     */
    private static final Logger LOG = LoggerFactory.getLogger(JDBCAdapter.class);

    private static ApplicationContext context;

    /**
     * Spring context injection.
     * 
     * @param context reference to the ApplicationContext.
     */
    public void setApplicationContext(ApplicationContext myContext) throws BeansException {
        context = myContext;
    }

    /**
     * Get a bean
     * 
     * @param beanName name of the bean to get.
     * @return Object reference to the named bean.
     * @throws IllegalArgumentException if spring context is not set
     * @throws NoSuchBeanDefinitionException if there is no bean definition with the specified name
     * @throws BeansException if the bean could not be obtained
     */
    public static Object getBean(String beanName) {
        if (context == null) {
            LOG.error("Can't get Spring context");
            LOG.error("****************************************");
            LOG.error("** Please insert this bean in your Spring configuration : ");
            LOG.error("** <bean id=\"sContext\" class=\"com.netliard.SpringHook\"/> ");
            LOG.error("****************************************");
            throw new IllegalArgumentException("Can't get com.netliard.SpringHook bean");
        }

        return context.getBean(beanName);
    }

}