activemq

I have a java web application which uses some form of custom message queuing via a database table (EmailQueue) to queue delivery of emails. The application is deployed on Tomcat and uses Quartz jobs which polls for new entries in the EmailQueue table to send. I now need to add queuing of a few other types of jobs and messages (notifications, sms, etc.) and am therefore looking into using a proper message queue ( RabbitMQ , ActiveMQ , etc.) instead of the database. This is motivated by a few articles on the matter which argue a database should not be used as a queue. I haven't completely gotten

一、特性及优势 1、实现 JMS1.1 规范，支持 J2EE1.4以上 2、可运行于任何 jvm和大部分 web 容器（ActiveMQ works great in any JVM） 3、支持多种语言客户端（java, C, C++, AJAX, ACTIONSCRIPT 等等） 4、支持多种协议（stomp，openwire，REST） 5、良好的 spring 支持（ActiveMQ has great Spring Support） 6、速度很快，JBossMQ的十倍（ActiveMQ is very fast; often 10x faster than JBossMQ.） 7、与 OpenJMS、JbossMQ等开源jms provider 相比，ActiveMQ有 Apache 的支 持，持续发展的优势明显。 二、下载部署 1、下载 http://activemq.apache.org/activemq-510-release.html ，下载 5.1.0 Windows Distribution版本 2、安装 直接解压至任意目录（如：d:\ apache-activemq-5.1.0） 3、启动 ActiveMQ服务器 方法 1： 直接运行 bin\activemq.bat 方法 2（在 JVM 中嵌套启动）： cd example ant embedBroker

I am using Spring for my application. I am wondering what differences there is between "embedded" ActiveMQ and "stand-alone" ActiveMQ. If I run ActiveMQ embedded, does thing mean remote clients can still connect up? Is my understand correct that embeded ActiveMQ means that ActiveMQ will start automatically when I start my Spring application, or is there some other meanings to it? For example Let's say I have deployed one application in system-A and deployed the same application in system-B.in the application I have configured embedded ActiveMQ broker through spring xml files with broker url as

i am new to jms and activemq. i produce one message to one static queue in activemq and get reply back to temporary queue using getJMSReplyTo. the code is following ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); // Create a Connection Connection connection = connectionFactory.createConnection(); connection.start(); // Create a Session Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // Create the destination (Topic or Queue) Destination destination = (Destination) session.createQueue("PostWithParameter_Queue");

While reading messages from a dynamic queue(ActiveMQ)(Pending Messages=1000), i had acknowledge each message,now the number of Messages Dequeued=1000. Is there any way to place all dequeued messages again into Queue. Any solution to get all messages backup physically. Thanks in advance Once broker get acknowledgment from consumer, it removes message from persistence store [KahaDB/database as per configuration] of broker. Hence if you have sent all messages to another queue or broker from your queue, you can resend those messages to your original queue. However all depends what you did with

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）(即一旦被消费，消息就不再在消息队列中) 发送者和接收者之间在时间上没有依赖性

ActiveMQ的传输协议 在ActiveMQ的安装路径conf/activemp.xml的<transportConnectors>标签之中有如下配置,它们代表ActiveMQ默认支持的一些传输协议 <transportConnectors> <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB --> <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="amqp" uri="amqp://0.0.0.0:5672?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="stomp" uri="stomp://0.0.0.0:61613?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="mqtt

Background Trying to connect to my Apache ActiveMQ broker using the AMQP 1.0 protocol via amqp10 . I am using the following code (adapted from the original example in the README): const AMQPClient = require("amqp10").Client; const Promise = require("bluebird"); //Fix from: https://github.com/noodlefrenzy/node-amqp10/issues/241 const activeMQPolicy = require("amqp10").Policy; const client = new AMQPClient(activeMQPolicy.ActiveMQ); const setUp = () => { return Promise.all([ client.createReceiver("amq.topic"), client.createSender("amq.topic") ]); }; client.connect("amqp://localhost") .then(setUp)