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AggregationController

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使用 HashMap 实现多线程的 Java 单例同步

我有以下类(class):publicclassAggregationController{privateHashMap>messages;privateHashMapcounters;BooleanbuildAggregateReply;privatebooleanisAggregationStarted;privatestaticHashMapinstances=newHashMap();privateAggregationController()throwsMbException{messages=newHashMap>();counters=newHashMap();build