amqp | 易学教程

如何从零到一设计一个MQ消息队列

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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

How do I stop the RabbitMQ server on localhost

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问题 I installed RabbitMQ server on OS X, and started it on command line. Now, it is not obvious that how I should stop it from running? After I did: sudo rabbitmq-server -detached I get: Activating RabbitMQ plugins ... 0 plugins activated: That was it. How should I properly shut it down? In the document, it mentions using rabbitmqctl(1) , but it's not clear to me what that means. Thanks. Edit: As per comment below, this is what I get for running sudo rabbitmqctl stop : (project_env)mlstr-1

Celery (Django) Rate limiting

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问题 I'm using Celery to process multiple data-mining tasks. One of these tasks connects to a remote service which allows a maximum of 10 simultaneous connections per user (or in other words, it CAN exceed 10 connections globally but it CANNOT exceed 10 connections per individual job). I THINK Token Bucket (rate limiting) is what I'm looking for, but I can't seem to find any implementation of it. 回答1: Celery features rate limiting, and contains a generic token bucket implementation. Set rate

Too many LOGS getting generated for Hystrix-AMQP

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问题 so I added the dependency for Hystrix-AMQP to my service and the log file is going crazy it just keep on logging metrics stuff. I need that jar to actually use it with turbine-AMQP. here is what i have in my gradle for hystrix:- compile ("org.springframework.cloud:spring-cloud-starter-hystrix:1.0.6.RELEASE") compile ('org.springframework.cloud:spring-cloud-starter-bus-amqp:1.0.6.RELEASE') compile ('org.springframework.cloud:spring-cloud-netflix-hystrix-amqp:1.0.7.RELEASE') compile ('com

Does Azure AppFabric really support AMQP 1.0?

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问题 I watched the AMQP 1.0 presentation by David Ingham, responsible for AMQP at Microsoft, which is about Azure AppFabric's support of AMQP messaging in the cloud. David says AppFabric will support AMQP for the messaging patterns Queue and Pub/Sub . Yet when checking documentation on official websites such as http://www.windowsazure.com/en-us/develop/java/how-to-guides/service-bus-queues/ (especially looking at non-.net stuff that, according to David's talk is supposed to connect via AMQP,

RabbitMQ, EasyNetQ With NodeJS (amqplib) - Subscribing

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问题 I'd already asked this question regarding publishing from amqplib --> EasyNetQ, and got it working with help from the author of EasyNetQ. Now, I'm having trouble going the other way. It did briefly "work", but then i went back and cleaned-out all the queues I'd created and now - it won't work (publishing from amqplib to ENQ still works, but ENQ to amqplib doesn't). If I have this code: Bus.SubscribeAsync<BusManifestHolla>(HollaSubID_1, msg => Task.Factory.StartNew(() => { Console.WriteLine(

jms amqp activemq rabbitmq的区别

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jms和amqp是消息代理的规范 activemq、rabbitmq是规范的实现：activemq是jms规范的实现，rabbitmq是amqp规范的实现来源： https://www.cnblogs.com/hzq3554055/p/12004633.html

How does RabbitMQ supports large number of virtual connections from a single TCP connection?

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问题 How does RabbitMQ supports large number of virtual connections in form of channels from a single TCP connection? Does the same optimization seen in other technologies? How does the pseudo-code to support multiple channels from a single TCP connection look like? 回答1: AMQP protocol declares in section 4.3 Channel Multiplexing: AMQP permits peers to create multiple independent threads of control. Each channel acts as a virtual connection that share a single socket: frames frames frames frames +-

openwire vs amqp, Which would perform better

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We currently use JMS API with ActiveMQ broker, looking over to move to RabbitMQ. Compared to openWire vs amqp which one would give best performance with java client-producer. I Couldn't find a comparison study on amqp(RabbitMQ) vs openwire (activeMQ) native protocol. I'm looking in terms of raw performance and ease of scalability. We currently use Spring Integration for ActiveMQ, I would like to know if its a drastic change to move to RabbitMQ(AMQP) even with Spring Integration. Is there any bridge similar to what ActiveMQ uses to do JMS<->AMQP forwarding ? ActiveMQ also supports AMQP: http:/

openwire vs amqp, Which would perform better

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问题 We currently use JMS API with ActiveMQ broker, looking over to move to RabbitMQ. Compared to openWire vs amqp which one would give best performance with java client-producer. I Couldn't find a comparison study on amqp(RabbitMQ) vs openwire (activeMQ) native protocol. I'm looking in terms of raw performance and ease of scalability. We currently use Spring Integration for ActiveMQ, I would like to know if its a drastic change to move to RabbitMQ(AMQP) even with Spring Integration. Is there any