即使不使用多线程处理，也要预先初始化xerces - C+ +以避免多次调用这个函数，然后在应用程序结束时将其终止。
Even if you don't use multithreading, initialize Xerces-C + + up front to avoid multiple calls to this function and then terminate when your application terminates.
除去重复消息：日志web服务除了必须保证消息被提交外，还要确保即使一条消息被提交多次，在服务器端也只处理一次。
Eliminate duplicate messages: The logging web service needs to ensure that messages submitted — even if submitted multiple times — are only processed once.
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