JMS相关概念

Java Message Service API Overview

The Java Message Service (JMS) defines the standard for reliable Enterprise Messaging. Enterprise messaging, often also referred to as Messaging Oriented Middleware (MOM), is universally recognized as an essential tool for building enterprise applications. By combining Java technology with enterprise messaging, the JMS API provides a powerful tool for solving enterprise computing problems. 

Enterprise messaging provides a reliable, flexible service for the asynchronous exchange of critical business data and events throughout an enterprise. The JMS API adds to this a common API and provider framework that enables the development of portable, message based applications in the Java programming language. 

The JMS API improves programmer productivity by defining a common set of messaging concepts and programming strategies that will be supported by all JMS technology-compliant messaging systems. 

The JMS API is an integral part of the Java 2, Enterprise Edition (J2EE) platform, and application developers can use messaging with components using J2EE APIs ("J2EE components"). 

Version 1.1 of the JMS API in the J2EE 1.4 platform has the following features:

• Message-driven beans enable the asynchronous consumption of JMS messages.
• Message sends and receives can participate in Java Transaction API (JTA) transactions.
• J2EE Connector Architecture interfaces that allow JMS implementations from different vendors to be externally plugged into a J2EE 1.4 application server.

The addition of the JMS API enhances the J2EE platform by simplifying enterprise development, allowing loosely coupled, reliable, asynchronous interactions among J2EE components and legacy systems capable of messaging. As a developer, you can easily add new behavior to a J2EE application with existing business events by adding a new message-driven bean to operate on specific business events. 

The J2EE platform's Enterprise JavaBeans (EJB) container architecture, moreover, enhances the JMS API in two ways:

• By allowing for the concurrent consumption of messages
• By providing support for distributed transactions, so that database updates, message processing, and connections to EIS systems using the J2EE Connector Architecture can all participate in the same transaction context.

 

JMS @ 互动百科

 

  JMS（Java Message Service，Java消息服务）是一组Java应用程序接口(Java API)，它提供创建、发送、接收、读取消息的服务。由Sun公司和它的合作伙伴设计的JMS API定义了一组公共的应用程序接口和相应语法，使得Java程序能够和其他消息组件进行通信。

      JMS是一种与厂商无关的 API，用来访问消息收发系统。它类似于 JDBC (Java Database Connectivity)：这里，JDBC 是可以用来访问许多不同关系数据库的 API，而 JMS 则提供同样与厂商无关的访问方法，以访问消息收发服务。许多厂商目前都支持 JMS，包括 IBM 的 MQSeries、BEA的 Weblogic JMS service和 Progress 的 SonicMQ，这只是几个例子。 

 

 

JMS @ 百度百科

JMS有以下元素组成。
　　JMS提供者 
　　连接面向消息中间件的，JMS接口的一个实现。提供者可以是Java平台的JMS实现，也可以是非Java平台的面向消息中间件的适配器。 
　　JMS客户 
　　生产或消费消息的基于Java的应用程序或对象。 
　　JMS生产者 
　　创建并发送消息的JMS客户。 
　　JMS消费者 
　　接收消息的JMS客户。 
　　JMS消息 
　　包括可以在JMS客户之间传递的数据的对象 
　　JMS队列 
　　一个容纳那些被发送的等待阅读的消息的区域。队列暗示，这些消息将按照顺序发送。一旦一个消息被阅读，该消息将被从队列中移走。 
　　JMS主题 
　　一种支持发送消息给多个订阅者的机制。