activemq | 易学教程

谁才是最快的消息队列:ActiveMQ, RabbitMQ, HornetQ, QPID...

阅读更多关于谁才是最快的消息队列:ActiveMQ, RabbitMQ, HornetQ, QPID...

Lately I performed a message queue benchmark , comparing several queuing frameworks (RabbitMQ, ActiveMQ…). Those benchmarks are part of a complete study conducted by Adina Mihailescu , and everything was presented at the April 2013 riviera.rb meet-up . You should definitely peek into Adina’s great presentation available online right here . Setup and scenarios So I wanted to benchmark brokers, using different protocols: I decided to build a little Rails application piloting a binary that was able to enqueue/dequeue items taken from a MySQL database . I considered the following scenarios:

【消息队列】ActiveMQ知识点

阅读更多关于【消息队列】ActiveMQ知识点

1. 什么是ActiveMQ ActiveMQ 是Apache出品，最流行的，能力强劲的开源消息总线。ActiveMQ 是一个完全支持JMS1.1和J2EE 1.4规范的 JMS Provider实现,尽管JMS规范出台已经是很久的事情了,但是JMS在当今的J2EE应用中间仍然扮演着特殊的地位 2.消息队列应用场景以下介绍消息队列在实际应用中常用的使用场景。异步处理，应用解耦，流量削锋和消息通讯四个场景 2.1 异步处理场景说明：用户注册后，需要发注册邮件和注册短信。传统的做法有两种: 1.串行方式；2.并行方式（1）串行方式：将注册信息写入数据库成功后，发送注册邮件，再发送注册短信。以上三个任务全部完成后，返回给客户端 2）并行方式：将注册信息写入数据库成功后，发送注册邮件的同时，发送注册短信。以上三个任务完成后，返回给客户端。与串行的差别是，并行的方式可以提高处理的时间假设三个业务节点每个使用50毫秒钟，不考虑网络等其他开销，则串行方式的时间是150毫秒，并行的时间可能是100毫秒。因为CPU在单位时间内处理的请求数是一定的，假设CPU在1秒内吞吐量是100次。则串行方式1秒内CPU可处理的请求量是7次（1000/150）。并行方式处理的请求量是10次（1000/100）小结：如以上案例描述，传统的方式系统的性能（并发量，吞吐量，响应时间

DefaultMessageListenerContainer not receiving messages

阅读更多关于 DefaultMessageListenerContainer not receiving messages

问题 I have a DefaultMessageListenerContainer configured as follows: DefaultMessageListenerContainer container = new DefaultMessageListenerContainer(); container.setConcurrentConsumers(4); container.setConnectionFactory(connectionFactory); container.setDestinationName(String.format("Consumer.%s.VirtualTopic.%s", group, topic)); container.setSessionAcknowledgeMode(Session.CLIENT_ACKNOWLEDGE); container.setSessionTransacted(true); container.setMessageListener(new DelegatingMessageListener(listener,

Virtual topics/queues and durability

阅读更多关于 Virtual topics/queues and durability

问题 What will happen to messages posted to a virtual topic when there are no consumers listening ? Will the broker hold them for a certain while until a subscriber is available ? More specifically : At T0 and T1 messages M0 and M1 are posted. At T2, consumer C1 connects, will he receive M0 and M1 ? Obviously messages M2 and M3 posted at T3 and T4 will be received by C1, but what will a new Consumer, C2, that connects at T5 receice ? All messages, M2 and M3, or none ? 回答1: It depends on the nature

Enforce socket timeout on ActiveMQ from Camel route?

阅读更多关于 Enforce socket timeout on ActiveMQ from Camel route?

问题 So below I have Camel (via Spring DSL) successfully integrating my beans with ActiveMQ queues:  <camelContext id="my-camel-context" xmlns="http://camel.apache.org/schema/spring"> <route> <from uri="activemq-myinstance:queue:myqueue" /> <onException> <exception>java.lang.Exception</exception> <redeliveryPolicy maximumRedeliveries="2" /> <to uri="activemq-myinstance:queue_failures" /> </onException> <to uri=

How do I turn on JMX in ActiveMQ 5.2

阅读更多关于 How do I turn on JMX in ActiveMQ 5.2

问题 Whats the proper way to enable JMX in ActiveMQ 5.2? I've seen conflicting documents, so I was wondering if anyone out there knows what the proper config file change should be. I think I might have it working by changing the batch file I use to start ActiveMQ, but I don't really know. 回答1:  <managementContext> <managementContext createConnector="true" /> </managementContext> Put this inside the bean of your broker in the

ActiveMQ的安装与配置

阅读更多关于 ActiveMQ的安装与配置

官网：　　 http://activemq.apache.org/ 1. 下载或上传：　　上传到/opt目录下面；上传：put F:\BaiduNetdiskDownload\apache-activemq-5.15.10-bin.tar下载：http://activemq.apache.org/components/classic/download移动：mv apache-activemq-5.15.10-bin.tar.gz /opt/ 2. 解压缩： cd /opt/tar -xzvf apache-activemq-5.15.10-bin.tar.gz -C /usr/local/cd /usr/local/mv apache-activemq-5.15.10/ activemq 3. 启动与关闭：　　检查是否安装JDK：java -version cd /usr/local/activemq/bin/ ./activemq start ./activemq stop ./activemq restart ./activemq start > /myactivemq/myrunmq.log 带日志启动 4. 查看启动：　　activemq的默认进程端口是：61616 ps -ef|grep activemqps -ef|grep activemq|grep -v

JMS and ThreadPool problem?

阅读更多关于 JMS and ThreadPool problem?

问题 I want that jms receives a message when one thread has handled a message (threadPool submits a callable). The messages are received by a master thread. Which way is better below: I use spring 3.0.5 : ApplicationContext context = new ClassPathXmlApplicationContext( "application-context.xml"); jmsTemplate = (JmsTemplate) context.getBean("jmsTemplate"); destination = (Destination) context.getBean("destination"); _log4j.debug("ThreadSize in xml\t" + appConfig.getThumbCreatorThreadSize()); in

gradle+springBoot2.2集合ActiveMq

阅读更多关于 gradle+springBoot2.2集合ActiveMq

springBoot集成AcitiveMq的时候，由于springBoot的版本不同，所有会出现不同的问题。当我们在启动连接池的时候有的时候会出现：启动项目会报错，提示JmsMessagingTemplate无法注入、这个时候，你可以参考： https://blog.csdn.net/eumenides_/article/details/91850332 可能是你引入jar包的问题。我们以springBoot2.2为例第一步：引入jar包。 compile('org.springframework.boot:spring-boot-starter-activemq') compile group: 'org.messaginghub', name: 'pooled-jms', version: '1.1.0' 在这个地方一定要切记：不能再引入springBoot的时候，把geronimo的包去除了。因为ActiveMq需要这个包。下面的要注解掉。 config.exclude group: "org.apache.geronimo.specs" config.exclude group: "com.google.code.findbugs" 第二步：在代码中引用mq 在启动类里添加： @EnableJms 所以接下来，在需要的controller层，引入redis /**

Using an expression in a JMS Selector in Mule 3

阅读更多关于 Using an expression in a JMS Selector in Mule 3

问题 I want to get a queue: <jms:inbound-endpoint connector-ref="jmsConnector" queue="queue.dev" > <jms:selector expression="JMSCorrelationID='353'"/> </jms:inbound-endpoint> It works but I want to use an expression in the selector: <jms:inbound-endpoint connector-ref="jmsConnector" queue="queue.dev" > <jms:selector expression="JMSCorrelationID='#[header:OUTBOUND:codeReport]'"/> </jms:inbound-endpoint> It's no working. 回答1: This doesn't make sense: you are trying to use an outbound property in an