com.yue.utils.SpringContextHolder.java Source code

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Here is the source code for com.yue.utils.SpringContextHolder.java

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/**
 * Copyright &copy; 2012-2013 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.yue.utils;

import java.io.IOException;

import org.apache.commons.lang3.Validate;
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.core.io.DefaultResourceLoader;
import org.springframework.stereotype.Service;

/**
 * ?????Spring ApplicationContext, ???ApplicaitonContext.
 * 
 * @author Zaric
 * @date 2013-5-29 ?1:25:40
 */
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware, DisposableBean {

    private static ApplicationContext applicationContext = null;

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

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

    public static String getRootRealPath() {
        String rootRealPath = "";
        try {
            rootRealPath = getApplicationContext().getResource("").getFile().getAbsolutePath();
        } catch (IOException e) {
            logger.warn("?");
        }
        return rootRealPath;
    }

    public static String getResourceRootRealPath() {
        String rootRealPath = "";
        try {
            rootRealPath = new DefaultResourceLoader().getResource("").getFile().getAbsolutePath();
        } catch (IOException e) {
            logger.warn("??");
        }
        return rootRealPath;
    }

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

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

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

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

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

        SpringContextHolder.applicationContext = applicationContext; // NOSONAR
    }

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

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