Learn about JMS, the purpose of JMS specification is to make Java access to other messaging servers.
First, the message server is generally two types, PTP, Publish-subscribe (Pub / Sub).
The message middleware that implements the JMS interface is called JMS-Provider.
Second, the JMS message model JMS message consists of two parts: Header and Body. Header contains the identification information of the message and routing information, and the body contains the actual data of the message. Third, according to the data format, the JMS message can be divided into the following: BYTESMESSAGE message is byte stream. The MapMessage message is a series of naming and value corresponding combinations. The ObjectMessage message is a fluidized Java object. The StreamMessage message is the input and output stream in Java. The TextMessage message is a string that will be widely used in XML format data.
Fourth, JMS News Priority Post Office is divided into two kinds, the same JMS is also divided into 0-9 ten levels according to the light weight of the message. 0-4 is normal news, 5-9 is an expedited message. JMS does not require a message middleware to send messages in strict accordance with this ten priority, but must ensure that the expeditation news will arrive first in normal messages.
In fact, it seems that these five kinds of news types are still in trouble. Try to do a small configuration in WebLogic8.1, it is also relatively simple, a connectionFactory, a destination queue, you can start A simple JMS application, this is the technique of technology, easy to use, easy to understand, I have a little start like this.
