activemq

StompClientLib - unsubscribe socketclient

人盡茶涼 提交于 2019-12-09 19:36:44
问题 I've added StompClientLib in my project and I'm facing problem while unsubscribing a destination topic. Unsubscription of destination gives following error: "org.apache.activemq.transport.stomp.ProtocolException: No subscription matched.\r\tat org.apache.activemq.transport.stomp.ProtocolConverter.onStompUnsubscribe(ProtocolConverter.java:734)\r\tat org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommand(ProtocolConverter.java:262)\r\tat org.apache.activemq.transport.ws

第十七章:springboot 整合 activeMQ

假如想象 提交于 2019-12-09 17:33:18
首先介绍 JMS   JMS即 Java消息服务 (Java Message Service)应用程序接口,是一个 Java平台 中关于面向 消息中间件 (MOM)的 API ,用于在两个应用程序之间,或 分布式系统 中发送消息,进行异步通信。Java消息服务是一个与具体平台无关的API,绝大多数MOM提供商都对JMS提供支持(百度百科给出的概述)。我们可以简单的理解:两个应用程序之间需要进行通信,我们使用一个JMS服务,进行中间的转发,通过JMS 的使用,我们可以解除两个程序之间的耦合。JMS是一种与厂商无关的 API,用来访问消息收发系统消息,它类似于JDBC(Java Database Connectivity)。 概念 JMS提供者:Apache ActiveMQ、RabbitMQ、Kafka、Notify、MetaQ、RocketMQ JMS生产者(Message Producer) JMS消费者(Message Consumer) JMS消息 JMS队列 JMS主题 JMS消息通常有两种类型:点对点(Point-to-Point)、发布/订阅(Publish/Subscribe) 接着介绍 activeMQ ActiveMQ 是Apache出品,最流行的. 功能强大的即时通讯和集成模式的开源服务器 特点: 1)支持来自Java,C,C ++,C#,Ruby,Perl

如何从零到一设计一个MQ消息队列

不问归期 提交于 2019-12-09 16:01:04
消息队列整体设计思路 主要是设计一个整体的消息被消费的数据流。 这里会涉及到:消息生产Producer、Broker(消息服务端)、消息消费者Consumer。 1.Producer(消息生产者):发送消息到Broker。 2.Broker(服务端):Broker这个概念主要来自于Apache的ActiveMQ,特指消息队列的服务端。 主要功能就是:把消息从发送端传送到接收端,这里会涉及到消息的存储、消息通讯机制等。 3.Consumer(消息消费者):从消息队列接收消息,consumer回复消费确认。 Broker(消息队列服务端)设计重点 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。 为了实现上述消息队列的基础功能: 消息的传输 存储 消费 就需要涉及到如下三个方面的设计: 通信协议 存储选择 消费关系维护 通讯协议 消息Message:既是信息的载体,消息发送者需要知道如何构造消息,消息接收者需要知道如何解析消息,它们需要按照一种统一的格式描述消息

Create ActiveMQ Connection on TLS1.2

扶醉桌前 提交于 2019-12-09 13:52:42
问题 We had to remove SSLV3 support. So we changed activemq configuration. we added transportConnector and set enabledProtocol='TLS1.1,TLS1.2'. So that it should support on TLS1.1 or TLS1.2 But i am not getting how should i specify protocol when i am creating connection. Now it is giving me error SSLV2Hello is disabled. So my question is how should i give protocol list while creating connection. I tried it SSLSocket but could not go through. Can somebody please give me clue.. String keyStorePath =

ActiveMQ安装部署(Windows)

情到浓时终转凉″ 提交于 2019-12-09 13:01:31
JMS(Java Messaging Service)是Java平台上有关面向消息中间件的技术规范,它便于消息系统中的Java应用程序进行消息交换,并且通过提供标准的产生、发送、接收消息的接 口简化企业应用的开发,ActiveMQ而是这个规范的一个具体实现。 JMS的队列消息传递过程如下图: JMS的主题消息传递过程如下图: ActiveMQ下载与部署。 1、 下载 到官网下载最新版本,有windows版本和linux版本的。 http://activemq.apache.org/download.html windows版本: apache-activemq-5.10-20140603.133406-78-bin.zip linux版本:apache-activemq-5.10-20140603.133406-78-bin.tar.gz 2、 部署 A、 windows下部署 ActiveMQ部署其实很简单,和所有Java一样,要跑java程序就必须先安装JDK并配置好环境变量,这个很简单。 然后解压下载的apache-activemq-5.10-20140603.133406-78-bin.zip压缩包到一个目录,得到解压后的目录结构如下图: 进入bin目录,发现有win32和win64两个文件夹,这2个文件夹分别对应windows32位和windows64位操作系统的启动脚本

Tomcat understands amq:broker but Eclipse marks errors in schema

三世轮回 提交于 2019-12-09 06:58:30
问题 When working with ActiveMQ in Eclipse, you might sometimes get a schema parsing error as such: Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'amq:broker'. However, the project deploys successfully in Tomcat. 回答1: To fix this, you must associate the ActiveMQ XSD URL with the schema. Go to XML->XML Catalog in Preferences, and add a User Specified Entry. Location: http://activemq.apache.org/schema

How to listen to a message queue from a web application? (Tomcat, ActiveMQ)

心已入冬 提交于 2019-12-09 06:21:57
问题 I'm happily improving my web application that runs on a Apache Tomcat . An ActiveMQ JMS server is added to send and receive messages. I already can send and receive messages, but need help on the receiver side. How should my web app continuously listen to one queue to receive messages? New messages arrive and the server should act on them. Ex: add data to the DB or or send an message back. I can already send messages. This is code. ActiveMQConnectionFactory factory = new

Max MQTT connections

拟墨画扇 提交于 2019-12-09 06:02:56
问题 I have a need to create a server farm that can handle 5+ million connections, 5+ million topics (one per client), process 300k messages/sec. I tried to see what various message brokers were capable so I am currently using two RHEL EC2 instances (r3.4xlarge) to make lots of available resources. So you do not need to look it up, it has 16vCPU, 122GB RAM. I am nowhere near that limit in usage. I am unable to pass the 600k connections limit. Since there doesn't seem to be any O/S limitation

Apache ActiveMQ 5.3 - How to configure a queue to reject duplicate messages?

为君一笑 提交于 2019-12-09 02:54:42
问题 I need the queue to enforce no-duplicate policy. Is it possible? If so , how? (I've been googling for hours... ) Edit: The ActiveMQSession implementation has this lines: // transform to our own message format here ActiveMQMessage msg = ActiveMQMessageTransformation.transformMessage(message, connection); // Set the message id. if (msg == message) { msg.setMessageId(new MessageId(producer.getProducerInfo().getProducerId(), sequenceNumber)); } else { msg.setMessageId(new MessageId(producer

Active MQ - HelloWorld example exception

 ̄綄美尐妖づ 提交于 2019-12-08 22:10:12
问题 I'm trying to run the hello world example found here I added activemq-all-5.5.1.jar to the libraries already It builds successfully with the following warning warning: [options] bootstrap class path not set in conjunction with -source 1.6 But it doesn't run, I get this exception Exception in thread "Thread-0" java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/jms/JMSException at java.lang.ClassLoader.defineClass1(Native Method) at