图3显示了在线路上发送的最终事件消息。

Figure 3 shows the final event message that is sent on the wire.

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例如，JMS客户机可以发送一条消息给一个MDB(该M DB一直在线等待传进来的消息)，而后者可以访问一个会话bean或者一些实体bean。

For instance, a JMS client could send a message to an MDB (which is constantly online awaiting incoming messages), which in turn could access a session bean or a handful of entity beans.

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例如，假定有一个应用程序在每次向在线购物车添加了物品后都会发送一条消息。

For example, consider an application that sends a message each time an item is added to an online shopping cart.

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