Queue Sender 队列发送者
The cluster sender channel must point to one of the queue managers that hosts a cluster repository.
集群发送器通道必须指向承载集群存储库的队列管理器之一。
In other words, the JMS provider can assure a message's sender that it was delivered to it's destination (a queue or topic) once and only once.
换句话说就是，JMS提供者可以向消息的发送方保证将消息发送到目的地(一个队列或主题)，并且是一次性发送。
A JMS sender puts a message in a JMS queue similar to a sender putting an envelope in the mail box.
JMS发送者推送一条消息到JMS消息队列就如同寄件人把一封信件放到了邮箱。
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