Figure 9 shows how the message engine is part of the application server.
图9显示了如何使消息引擎成为应用服务器的一部分？
A message engine has its own data source, which is USES to store persistent messages.
消息引擎有自己的数据源，它用来存储永久性消息。
Messages that are managed-non-persistent, however, are lost when the message engine is restarted.
不过，Managed - non - persistent类型的消息会在消息引擎重启时丢失。
Messages that are managed-non-persistent, however, are lost when the message engine is restarted.
不过，Managed - non - persistent类型的消息会在消息引擎重启时丢失。
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