activemq

High Performance JMS Messaging

由 ￡可爱￡侵袭症＋ 提交于 2019-12-18 02:41:20
问题 I read slides from this year's UberConf and one of the speakers is making the argument that Spring JMS adds a performance overhead to your message queue system, however I don't see any evidence to support that in the slides. The speaker also makes the case that point-to-point is faster than the traditional "publish-subscribe" method because each message is sent only once instead of being broadcasted to every consumer. I'm wondering if any experienced Java messaging gurus can weigh-in here and

Avoiding duplicated messages on JMS/ActiveMQ

由 孤街浪徒 提交于 2019-12-17 22:47:13
问题 Is there a way to suppress duplicated messages on a queue defined on ActiveMQ server? I tried to define manually JMSMessageID, (message.setJMSMessageID("uniqueid")), but server ignores this modification and deliver a message with built-in generated JMSMessageID. By specification, I didn't found a reference about how to deduplicate messages. In HornetQ, to deal with this problem, we need to declare the HQ specific property org.hornetq.core.message.impl.HDR_DUPLICATE_DETECTION_ID on message

ACTIVEMQ- publisher subscriber hello world example

由 回眸只為那壹抹淺笑 提交于 2019-12-17 22:19:39
问题 There are two programs: subscriber and publisher... Subscriber is able to put the message onto the topic and the message is sent successfully. When I check the activemq server on my browser it shows 1 msg enqueued . But when I run the consumer code, it is not receiving the message Here is the producer code: import javax.jms.*; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; public class producer { private static String url =

ActiveMQ console not available

由 佐手、 提交于 2019-12-17 21:07:46
问题 I installed ActiveMQ 5.5.0 on my Windows machine, and it had a web console (http://localhost:8161/admin) working out of the box. Then I installed ActiveMQ (same version) on a remote Linux box (IP: AAA.BBB.CCC.DDD), but whenever I point the browser to http://AAA.BBB.CCC.DDD:8161/admin I get the "Unable to connect" error in the browser. The network connection is there, I can connect to AAA.BBB.CCC.DDD via ssh and to another web application running on the same server. Therefore I think that the

MQ消息队列的12点核心原理总结

由 我的未来我决定 提交于 2019-12-17 21:06:26
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 1. 消息生产者、消息者、队列 消息生产者Producer：发送消息到消息队列。 消息消费者Consumer：从消息队列接收消息。 Broker：概念来自与Apache ActiveMQ，指MQ的服务端，帮你把消息从发送端传送到接收端。 消息队列Queue：一个先进先出的消息存储区域。消息按照顺序发送接收，一旦消息被消费处理，该消息将从队列中删除。 2.设计Broker主要考虑 1）消息的转储：在更合适的时间点投递，或者通过一系列手段辅助消息最终能送达消费机。 2）规范一种范式和通用的模式，以满足解耦、最终一致性、错峰等需求。 3）其实简单理解就是一个消息转发器，把一次RPC做成两次RPC。发送者把消息投递到broker，broker再将消息转发一手到接收端。 总结起来就是两次RPC加一次转储，如果要做消费确认，则是三次RPC。 3. 点对点消息队列模型 点对点模型 用于 消息生产者 和 消息消费者 之间 点到点 的通信。 点对点模式包含三个角色： 消息队列（Queue） 发送者(Sender) 接收者(Receiver) 每个消息都被发送到一个特定的队列，接收者从队列中获取消息。队列保留着消息，可以放在 内存 中也可以 持久化，直到他们被消费或超时。 特点 每个消息只有一个消费者（Consumer）

How do you process messages in parallel while ensuring FIFO per entity?

由 本秂侑毒 提交于 2019-12-17 20:24:18
问题 Let's say you have an entity, say, "Person" in your system and you want to process events that modify various Person entities. It is important that: Events for the same Person are processed in FIFO order Multiple Person event streams be processed in parallel by different threads/processes We have an implementation that solves this using a shared database and locks. Threads compete to acquire the lock for a Person and then process events in order after acquiring the lock. We'd like to move to

Could not start 2 embedded active-mq on different ports within different spring boot applications

由 跟風遠走 提交于 2019-12-17 14:33:51
问题 I have 2 spring-boot applications. Each application has embedded active mq broker. I need to have 2 applications working on the same PC in parallel but it doesn't work now. First application always starts successfully: 2018-02-02 11:48:20.095 INFO 7660 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@53045c6c: startup date [Fri Feb 02 11:48:20 MSK 2018]; root of context hierarchy 2018-02-02 11:48:20.923

JavaScript Load Order

由 感情迁移 提交于 2019-12-17 07:25:19
问题 I am working with both amq.js (ActiveMQ) and Google Maps. I load my scripts in this order <head> <meta http-equiv="content-type" content="text/html;charset=UTF-8" /> <title>AMQ & Maps Demo</title> <!-- Stylesheet --> <link rel="stylesheet" type="text/css" href="style.css"></link> <!-- Google APIs --> <script type="text/javascript" src="http://www.google.com/jsapi?key=abcdefg"></script> <!-- Active MQ --> <script type="text/javascript" src="amq/amq.js"></script> <script type="text/javascript"

ActiveMQ

由 ぃ、小莉子 提交于 2019-12-17 02:38:11
ActiveMQ 扩展出： API 接受发送 MQ 的高可用 MQ 的集群容错配置 MQ 的持久化 延时发送 签收机制 Spring/SpringBoot 整合 等 // MQ 都需要满足的技术 MQ ： 消息中间件/消息队列 为什么要使用 MQ ？ 解决了耦合调用、异步模型、抵御洪峰流量，保护了主业务，消峰。 二、安装ActiveMQ docker环境下安装 [ root@linksys ~ ] # docker pull docker.io/webcenter/activemq Using default tag: latest latest: Pulling from webcenter/activemq 7dcf5a444392: Pull complete 9eebba75a87f: Pull complete 1f0440d87cc7: Pull complete dacd0555c1b4: Pull complete b0f19aa05a94: Pull complete 4796f64423b2: Pull complete 5d994b710cb9: Pull complete 313a84c05d3c: Pull complete 1d6a562461f1: Pull complete e25558998b21: Pull complete

ActiveMQ在Center OS7上的安装以及在windows上访问activemq

由 让人想犯罪 __ 提交于 2019-12-17 02:26:42
什么是消息中间件 　　百度：消息中间件利用高效可靠的消息传递机制进行平台无关的数据交流，并基于数据通信来进行分布式系统的集成， 　　　　　通过提供消息床底和消息排队模型，它可以在分布式环境下扩展进程间的通信。 　　总结：简单来说就是：可以通过消息排队模型在进程间传递数据的独立组件。 JMS的概念与规范 点对点 (p2p) 每个消息只能有一个消费者 消息的生产者和消费者之间没有时间上的相关性。无论消费者在生产者发送消息的时候是否处于运行状态，都可以提取消息 每个消息可以有多个消费者 发布订阅 (pub/sub) 　　消息的生产者和消费者之间存在时间上的相关性，订阅一个主题的消费者只能消费自它订阅之后发布的消息。 JMS规范允许提供客户端创建持久订阅 什么是ActiveMQ 　　　 Apache ActiveMQ ™是最受欢迎和功能最强大的开源消息传递和 Integration Patterns 服务器。 　　　Apache ActiveMQ速度快，支持许多 跨语言客户端和协议 ，具有易于使用的 企业集成模式 和许多 高级功能， 同时完全支持 JMS 1.1 和J2EE 1.4。 Apache ActiveMQ是在 Apache 2.0许可 下 发布的 　　　官方网址：http://activemq.apache.org/index.html ActiveMQ在Center OS
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