记录下。。concurrentMap的使用代码

private static final ConcurrentHashMap delegatorCache = new ConcurrentHashMap();
do {
            Object delegator = delegatorCache.get(delegatorName);

            if (delegator != null) {
                
                return delegator;
            }
            try {
                delegator = new Object();
            } catch (ClassNotFoundException e) {
                Debug.logError(e, module);
            }
            //Debug.logInfo("putting delegator(" + delegatorName + ") into cache", module);
            delegatorCache.putIfAbsent(delegatorName, delegator);
        } while (true);