JMS会话的目的是什么？ [英] What is the purpose of a JMS session?

问题描述

JMS会话的目的是什么？为什么单独的连接不足以在发件人和收件人之间交换JMS消息？

What is the purpose of a JMS session? Why isn't a connection alone sufficient to exchange JMS messages between senders and receivers?

推荐答案

请参阅java.sun.com

Session对象是用于生成和使用消息的单线程上下文。虽然它可以在Java虚拟机（JVM）之外分配提供程序资源，但它被视为轻量级JMS对象。

A Session object is a single-threaded context for producing and consuming messages. Although it may allocate provider resources outside the Java virtual machine (JVM), it is considered a lightweight JMS object.

会话有多种用途：

• 它是消息生产者和消费者的工厂。


• 它提供提供商优化的消息工厂。


• 它支持一系列事务，这些事务将跨越生产者和消费者的工作组合成原子单元。


• 它定义了消费消息的序列顺序和消息它生成。


• 它会在确认之前保留它消耗的消息。


• 它序列化了向消息使用者注册的消息监听器的执行。

• It is a factory for its message producers and consumers.
• It supplies provider-optimized message factories.
• It supports a single series of transactions that combine work spanning its producers and consumers into atomic units.
• It defines a serial order for the messages it consumes and the messages it produces.
• It retains messages it consumes until they have been acknowledged.
• It serializes execution of message listeners registered with its message consumers.

会话可以创建和服务多个消息生产者和消费者。

A session can create and service multiple message producers and consumers.

一个典型的用法是在同步MessageConsumer上有一个线程块，直到消息到达。然后，该线程可以使用Session的MessageProducers中的一个或多个。

One typical use is to have a thread block on a synchronous MessageConsumer until a message arrives. The thread may then use one or more of the Session's MessageProducers.

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