jms | 易学教程

Set timeOut for session/transaction to DefaultMessageListenerContainer

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问题 I want to receive chunk of messages from Queue within some timeLimit(Ex : 300 millisec after receiving the 1st message) using DefaultMessageListenerConatiner Of Spring (By overriding doReceiveAndExecute) as mentioned in the link. I can group the messages of my batch size i.e 20 when the queue is having too many messages and I can receive less than 20 messages when there are very less messages in Queue. Issue : I see it takes too much time(sometimes 1 sec and sometime 2 secs and more) for

Execution of JMS message listener failed, and no ErrorHandler has been set

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问题 When I use Spring to listen to JMS messages, I receievd the above error. I am wondering how to add an Errorhandler into the JMS listener? 回答1: There is a property on AbstractMessageListenerContainer: <bean id="listener" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="errorHandler" ref="someHandler"/> <property name="destinationName" value="someQueue"/> <property name="connectionFactory" ref="connectionFactory"/> </bean> Where someHandler is a bean

Relationship between JMS connections, sessions, and producers/consumers

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问题 I want to send a batch of 20k JMS messages to a same queue. I'm splitting the task up using 10 threads, so each will be processing 2k messages. I don't need transactions. I was wondering if having one connection, one session, and 10 producers is the recommended way to go or not? How about if I had one producer shared by all the threads? Would my messages be corrupt or would it be sent out synchronized (giving no performance gain)? What's the general guideline of deciding whether to create a

ActiveMQ_BASE ActiveMQ--什么是ActiveMQ？

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ActiveMQ基础学习------------初涉ActiveMQ 初涉ActiveMQ 什么是JMS？ JMS模型有哪些基本的要素？什么是消息中间件？安装ActiveMQ流程初涉ActiveMQ 第一次写博客，希望大家看的觉得有问题，不对的地方,没说明白的地方可以指出，大家共同学习进步。什么是JMS？学习ActiveMQ 我个人觉得要先了解什么是JMS，JMS和ActiveMQ的关系。 JMS Java消息服务（Java Message Service）是JAVAEE的13个技术规范之一，是java平台上有关面向消息中间件的技术规范（这里涉及到消息中间件了），可以实现异步通讯。我觉得JMS和ActiveMQ的关系是JMS包含ActiveMQ，JMS是规范，ActiveMQ是其引申，实现，但要遵循其规范。 JMS模型有哪些基本的要素？连接工厂、JMS连接、JMS会话、JMS目的、JMS生产者和消费者、JMS消息类型（点对点、发布/订阅）。一共有6个要素，在02章节，编写简单的ActiveMQ代码的时候你会发现这MQ的编写都是这6个要素，并且ActiveMQ中也提供了JMS调用的方法。什么是消息中间件？什么是消息中间件？有点像是餐厅里面的服务员，在厨师繁忙或者客人众多请求的时候，对消息进记录和传递。现在常用的消息中间件 kafka ActiveMQ

jms入门

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一.所需jar（maven） <dependency> <groupId>org.apache.activemq</groupId> <artifactId>activemq-all</artifactId> <version>5.14.3</version> </dependency> 二.创建生产者 import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.command.ActiveMQQueue; import org.apache.activemq.command.ActiveMQTopic; import javax.jms.*; import java.io.Serializable; public class JMSProducer { public static void main(String[] args) throws JMSException { ConnectionFactory connectionfactory =new ActiveMQConnectionFactory("username","pwd","tcp://localhost:61616"); //创建与JMS服务的连接:ConnectionFactory被管理的对象，由客户端创建

Filtering in JMS based on body content

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问题 I m implementing Pub/Sub model using JMS. I send a message from Pub to all Subscribers. I want that subscribers should get filtered messages based on some string in actual message body. For example a subscriber subscribe to a topic 'sports' and should receive only those posts which has keyword 'cricket' in it in the message text body. p.s. I dont want to use message selectors. How can I implement this. Thanks and Regards. 回答1: Take a look at apache camel. It provides a means of routing and

Filtering in JMS based on body content

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Compilation error In RAD 8.5 - JMS Message Producer client to post message to websphere Queue

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问题 I am trying to write a java client which posts a message to a Queue.I am using Java 7 and RAD 8.5. RAD is complaining that some classes cannot be resolved.Please help me fix it. import javax.jms.Connection; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.MessageProducer; import javax.jms.Session; import javax.jms.TextMessage; import javax.naming.Context; import javax.naming.NamingException; import javax.naming.directory.InitialDirContext; import com.ibm.msg

Compilation error In RAD 8.5 - JMS Message Producer client to post message to websphere Queue

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How to concurrently process the asynchronous jms queue message?

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问题 My JMS consumer produces any number of messages on a JMS queue during the day. As soon as a message arrives it goes to message listener. If in between I need some other message comes, it goes to another message listener does not wait for first one? As per my understanding here I need to create two consumer(assume i want to process 2 message concurrently) each having its own session. Both consumer can use the same message listener. Right? I am not sure if I can achieve it with single consumer