1.ReentrantLock 给类文件加锁，实现类似synchronized(class)的功能

核心是类文件中，使用static修饰的reentrantLock对象

public class SourceCache {

    public static final Lock reentrantLock = new ReentrantLock();

    /**

     * 系统名，devopsdata的映射map

     */

    private static Map<String,DevopsData> devopsDataCache;

    /**

     * 系统名, jonedata的映射map

     */

    private static Map<String,JoneData> joneDataCache;

    public static Map<String, DevopsData> getDevopsDataCache() {

        return devopsDataCache;

    }

    public static Map<String, JoneData> getJoneDataCache() {

        return joneDataCache;

    }

    public static void setDevopsDataCache(Map<String, DevopsData> devopsDataCache) {

        reentrantLock.lock();

        try {

            SourceCache.devopsDataCache = devopsDataCache;

        }finally {

            reentrantLock.unlock();

        }

    }

    public static void setJoneDataCache(Map<String, JoneData> joneDataCache) {

        reentrantLock.lock();

        try {

            SourceCache.joneDataCache = joneDataCache;

        }finally {

            reentrantLock.unlock();

        }

    }

}

2.加锁，执行写入，解锁三部曲

reentrantLock.lock();

try {

    SourceCache.joneDataCache = joneDataCache;

}finally {

    reentrantLock.unlock();

}