net.cloudkit.integration.utils.SpringContextHolder.java Source code

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Here is the source code for net.cloudkit.integration.utils.SpringContextHolder.java

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/*
 * Copyright (C) 2015 The CloudKit Open Source Project
 *
 * 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 net.cloudkit.integration.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Component;

/**
 * Spring IOC
 * ?????Spring ApplicationContext, ???ApplicaitonContext.
 *
 * @author hongquanli <hongquanli@qq.com>
 * @version 1.0 20150826 ?11:38:34
 */
@Component
@Lazy(value = false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {

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

    /**
     * ?IOC
     */
    private static ApplicationContext applicationContext = null;

    /**
     * ?????ApplicationContext.
     */
    public static ApplicationContext getApplicationContext() {
        // assertContextInjected();
        return applicationContext;
    }

    /**
     * ApplicationContextAware?, Context????.
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        logger.debug("ApplicationContextSpringContextHolder:{}", applicationContext);

        if (SpringContextHolder.applicationContext != null) {
            logger.warn("SpringContextHolderApplicationContext, ApplicationContext:"
                    + SpringContextHolder.applicationContext);
        }

        SpringContextHolder.applicationContext = applicationContext; //NOSONAR
    }

    /**
     * ????applicationContext?Bean, .
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        // assertContextInjected();
        return (T) applicationContext.getBean(name);
    }

    /**
     * ????applicationContext?Bean, .
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> requiredType) {
        // assertContextInjected();
        return applicationContext.getBean(requiredType);
    }

    /**
     * SpringContextHolderApplicationContextNull.
     */
    public static void clearHolder() {
        logger.debug("SpringContextHolderApplicationContext:" + applicationContext);
        applicationContext = null;
    }

    /**
     * DisposableBean?, Context?????.
     */
    @Override
    public void destroy() throws Exception {
        SpringContextHolder.clearHolder();
    }

    //    /**
    //     * ApplicationContext?.
    //     */
    //    private static void assertContextInjected() {
    //        Validate.validState(applicationContext != null, "applicaitonContext, applicationContext.xmlSpringContextHolder.");
    //    }
}