Once the message has been sent, the sender can store a reference to the Future object and check periodically for completion, or it can block and wait if needed by calling the get method.
消息被发送之后，发送者可以保存对Future对象的一个引用并定期检查是否完成，或者，它也可以通过调用get方法来阻塞和等待。
allows your thread to block - by calling f.get() - to ensure the network calls succeed, or go away by ignoring f altogether.
可以阻塞线程，再调用f.get()可以让网络调用继续进行或是忽略掉f。
If you need to block the calling thread for a specific time, then use the pthread_cond_timewait to block the thread.
如果您需要在指定的一段时间内阻塞发出调用的线程，那么请使用pthread_cond _timewait来阻塞它。
On the other hand, if the calling thread needs to be blocked for a specific time, then pthread_cond_timedwait is used to block the thread.
在另外一方面，如果调用线程需要被阻塞一段确定的时间，那么就可以使用pthread_cond _ timedwait来阻塞这个线程。
I suggest creating a method that logs exception information and calling that method in the catch block of your exception blocks.
我建议创建一个方法记录异常的信息，并且当出现异常时调用这个方法并遮蔽掉您所抛出的异常。
I suggest creating a method that logs exception information and calling that method in the catch block of your exception blocks.
我建议创建一个方法记录异常的信息，并且当出现异常时调用这个方法并遮蔽掉您所抛出的异常。
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