jms message structure

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JMS: The difference between message acknowledgement and transacted session

Message acknowledgement or transacted session? Posted on 05/30/2011, No Comments (ADD) JMS is one of the oldest Java EE specifications (JMS 1.0 specification is dated 11/1999), however, questions aboutThe difference between message acknowledgement and transacted session still come up. The difference is especially subtl

Two message models for JMS (point-to-point-to-peer and Publish/subscribe (pub/sub)) Examples of applications

(subscriber). The client sends the message to the topic. Multiple publishers send messages to topic, which the system passes to multiple subscribers. Each message can have multiple consumers There is a time dependency between the Publisher and the Subscriber. Subscribers to a topic (TOPIC) must create a subscription before they can consume the publisher's message

JMS Message Selector Selector__java history

Business scene: A system through a queue (assuming the queue name is QueueA) to the B system to send messages, then the business adjustment, B system split into two systems B1,B2, respectively, processing different business, and each need to obtain different messages from the QueueA. In order not to change the logic of a system, a system also sends different messages to b1,b2 through a queue. B1,B2 to automatically select the message that belongs to y

Comparison between topic and queue in two message transmission modes of JMS

The two message transmission modes topic and queue in the JMS specification are compared as follows (): Topic Queue Summary Publish subscribe messaging publish and subscribe messages Point-to-point Status or not Topic data is stateless by default. By default, queue data is stored as files on the MQ server. For example

Two modes of JMS p2p,pub/sub message sending

topic. Multiple publishers send messages to topic, which the system passes to multiple subscribers.? Each message can have multiple consumers? There is a time dependency between the Publisher and the Subscriber . Subscribers to a topic (TOPIC) must create a subscription before they can consume the publisher's message and, in order to consume the message, the Sub

JMS message persistence: persists ActiveMQ messages to mySql database _ MySQL

JMS message persistence: Persistence of ActiveMQ messages to mySql database ActiveMQ5.8.0 uses kahadb as the default message persistence mode. By using the default persistence mechanism, we cannot directly see how the message persists. The JDBC persistence mechanism provided by ActiveMQ can store persistent information

Questions about the JMS message pending

Some time ago, I was told by a colleague that there are a lot of message status for receive in the client, which can only be consumed if the JMS server or WebLogic server is fully charged. After investigation, this problem may be a bug in the WebLogic, of course, does not exclude the possibility of the specific environment. Let's take a look at the root cause of the problem, which helps us to understand mor

Asynchronous [JMS] [ActiveMq] How the retry mechanism does not cause a message to be executed multiple times.

The problems and solutions of the single machine affairs of Taobao's mass storage http://blog.csdn.net/jiao_fuyou/article/details/15499261 This article is quite good. Core keywords: idempotent. Message Queue Activemq:redeliver, how to do the retry mechanism does not result in a piece of information being executed multiple times. Http://stackoverflow.com/questions/4934386/avoiding-duplicated-messages-on-jms

JMS Learning (iii) ActiveMQ Message persistence

The 1,JMS specification supports two types of message delivery: Persistent and non-persistent. ACTIVEMQ supports the recovery of messages, intermediate status messages (message is cached in memory) when both types of delivery are supported2,ACTIVEMQ can store messages in three types of media: file-based (stored in a file), in-memory (stored in memory), relational

JMS Learning (iii) ActiveMQ Message persistence

The 1,JMS specification supports two types of message delivery: Persistent and non-persistent. ACTIVEMQ supports the recovery of messages, intermediate status messages (message is cached in memory) when both types of delivery are supported2,ACTIVEMQ can store messages in three types of media: file-based (stored in a file), in-memory (stored in memory), relational

Use Spring JMS to simplify Asynchronous Message Processing

("UIL2ConnectionFactory"); queue = (Queue) jndiContext.lookup(queueName); } catch (NamingException e) { System.out.println("JNDI API lookup failed: " + e.toString()); } /* * Create connection, session, sender objects. * Send the message. * Cleanup JMS connection. */ try { queueConnection = queueConnectionFactory.createQueueConnection();

About the status of the JMS message in WebLogic

Today, my colleague asked me how to handle the JMS messages of receive and visible. A little bit ignorant, before the state of the message has never been concerned. In the Weblogic81, we can't see the message in destination, we can only see how many messages there are in the current destination, how many pending are there. And in 92, when we monitor the destinati

"Go" uses Redis's pub/sub to implement JMS-like message persistence

listener =New Pubsublistener ("Client_one",new Jedis ( "127.0.0.1")); Subclient subclient = new subclient ( "127.0.0.1", listener); Thread T1 = new Thread (new Runnable () { @Override public void run () {//at the API level, this is a polling operation and will not return unsubscribe until Subclient.sub is called ( Channel); } }); T1.setdaemon (true); T1.start (); int i = 0; while (i 2) {Pubclient.publish (channel, " "Message" +i); i++; Thread.Sleep (

JMS Message Type

The JMS API defines five types of message bodies: --------------------------------------------------------------------------------------------------------------- ----Stream-The message body of the Streammessage object contains the Java programming language primitive value stream ("Java basic type"). Populate and read sequentially.Map-The

JMS Learning 11 (SPRING+ACTIVEMQ message Persistence, topic persistent subscription) __JMS

ClientID can not be the same. Let's take a look here. The project structure is as follows: Project Structure Introduction: 1, a message producer, two message consumers and a listener class is Mymessagelistener.java, the same as the asynchronous processing of messages and heavy activemq. 2, three profiles are the

Generation of unique message IDs in JMS

In the development of message-oriented middleware, it is often necessary to generate a unique message identifier. You can add a corresponding prefix to the server deployed in the project, and then the timestamp is too long based on the system timestamp, it can be converted into a 36-digit string to form the unique identifier of the message: import java.text.Par

ACTIVEMQ instance 2--spring JMS Send Message

= "Com.activemqtest.serviceImpl.TopicProvider" > the - - the theclass= "Com.activemqtest.serviceImpl.TopicMessageListener"/> the the - class= "Org.springframework.jms.listener.DefaultMessageListenerContainer" > the the the94 the theView CodeDispactcherservlet.xml123Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"4xmlns:context= "Http://www.springframework.org/schema/context"5Xmlns:mvc= "Http://www.springframework.org/schema/mvc"6xsi:schemalocation= "Http://www.springframework.

JMS message Persistence, persisting ACTIVEMQ messages to MySQL database

The ActiveMQ5.8.0 version uses KAHADB as the default message persistence method. Using the default persistence mechanism, it is not easy to see exactly how the message lasts. ACTIVEMQ provides a JDBC persistence mechanism to store persistent information in a database. By looking at the table structure and stored data generated by ACTIVEMQ in the database, you can

Learning message (11): Testing the mouse message related to the twmmouse Structure

The message structure consistent with twmmouse is as follows: Detail {left-click} twmlbuttondown {left-click} twmlbuttonup {left-click to raise} twmmbuttondblclk {middle-click} twmmbuttondown {middle-click to press} twmmbuttonup {middle-click to move} else {right-click} twmrbuttondown {right-click and press} twmrbuttonup {right-click to raise} Code file: Unit unit1; interfaceuses windows, messages, sys

Learning message (9): Message structure Overview

Message transmission refers to the transmission of message data, and data is a group of data, so the message is a structure; The standard message structure of the system is defined as tmsg in Delphi. PMSG = ^ tmsg; tagmsg

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