Rabbit MQ

Cloud System Software Institute

Institute for Information Industry

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Outline

• Introduction

• Technical survey

• AMQP

• Rabbit MQ

• Implement

• Q&A

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Introduction

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What is server push

3. Message wall ,history messages

1.Notifications

2. Message and Chat

Unread messages

Ajax V.S Comet

• Ajax– When user trigged (mouseover or click…) or using

“Periodic Refresh” to check data update.

• Comet– Let browser and server connect on a long-request.– Server can send data to client, client doesn't have

to send request first.

Ajax V.S Comet

Websocket

• WebSocket is a web technology providing full-duplex communications channels over a single TCP connection.

• The WebSocket protocol makes possible more interaction between a browser and a web site.

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Technical survey

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Push server compare

Support OS Scalability ComplexityPayment &

Open SourceNOTE

Stream Hub

WIN 、 MAC 、 Linux 、Solaris 、 U

nix

No LowLimit For

FreeAjax Push

Server

Node.js Windows Mac OS

LinuxYes Medium Free

websocketWeb service

Ajax Push (APE)

Linux, BSD & Mac OS

No Low FreeAjax push

Server

Rabbit MQWindows

Linux , Mac OS

Yes Low Freewebsocket

Web Service

Push server

• Stream Hub – Light and quick Comet Server

• Node.js – Base on Google Chrome V8 JavaScript engine.– The fastest JavaScript engine– Design for “Comet(long pulling) Request Server” and

capable to handle massive message exchange.• Ajax Push (Ajax Push Engine) – Apply for Comet(long pulling) Request Server and

easy to setup.– Base on Node.js

Node.js

• Pro – Build for Web Push .– Java Script Engine (Event Driven) quick and light.– Hottest technology now.– Could provide multi-service in future.– Modules support.

• Cons– NodeJS is just a base engine, Still need to develop a whole

service.– Stable need to test for porting on the machine.

Rabbit MQ

• Robust messaging for applications.

• Easy to use Runs on all major operating systems.

• Supports a huge number of developer platforms.

• Open source and commercially supported.

• Base on Advanced Message Queuing Protocol (AMQP)

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Node.js VS. Rabbit MQ

• Node .js– 優點 :

• 在 server 和 client 間建立 socket 容易• 高效率

– 缺點 :• 需要自己管理 connection 及自己做 routing

• RabbitMQ– 優點 :

• subscribe/publish/broadcasting ，三個願望一次滿足• 有實做一套 memory monitor 的機制• 提供資料保存 提高了訊息的傳送可靠性• 安全性較高

– 缺點 :• 消耗資源較大• 使用 Erlang 撰寫，維護原碼 effort 較高

AMQPAdvanced Message Queuing Protocol

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The Advanced Message Queuing Protocol (AMQP) is an open standard application layer protocol for message-oriented middleware. The defining features of AMQP are message orientation, queuing, routing (including point-to-point and publish-and-subscribe), reliability and security.

The AMQP

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AMQP protocol

•  AMQP (高級消息隊列協議 ) –異步消息傳遞所使用的應用層協議規範–生產者在產生消息之後，把消息發送到消息服務器，再由消息服務器發給消費者

• Message broker: a server to which AMQ clients connect using the AMQ protocol. Message brokers can run in a cluster but these details are implementation specific and are not covered by the specification.

• Consumer: a user is an entity that, by providing credentials in form of a password, may or may not be authorized to connect to a broker.

• Connection: a physical connection (e.g., using TCP/IP or SCTP). A connection is bound to a user.

• Channel: a logical connection that is tied to a connection

broker

Consumer

Channel

AMQP Server

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AMQP protocol

• Advanced Message Queuing Protocol (AMQP)– virtual host

• A host containes Exchange 、 Queue 、 Binding

– Exchange• A message with with routing key

– Message Queue• Keep message, and send it to message consumer

– Binding• Message binding with routes rule ，例如，指明具有路由鍵“ X” 的消息要到綁定的名稱隊列中

AMQP Architecture

Personal messagesService exchange

Rabbit MQ

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RabbitMQ

Native support

• C

• C#

• Erlang

• Java

• Php

• Python

• Python-puka

• Ruby

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Fanout Exchange

Direct Exchange

Topic Exchange

Implement

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Push work flow1. Server create a message queue. (without binding user)

2. Client connect to server and bind the queue. (connection established)

3. Server send messages to queue.

4. Client received messages from server.

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Three step for create connection

1.Create connection factory.

2.Create connection.

3.Create channel.

1. ConnectionFactory factory = new ConnectionFactory();

2. factory.setHost("140.92.25.159");

3. Connection connection = factory.newConnection();

4. Channel channel = connection.createChannel();

Java example

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Send Message example

1 String message “This is a message”;

2 channel.basicPublish("", QUEUE_NAME, null, message.getBytes());

Java example

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For among consumers

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1 String message “This is a message”;

2 channel.basic_publish(exchange=‘ ', routing_key='hello', body=message)

Message publish

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1 String message “This is a message”;

2 channel.exchange_declare(exchange='logs', type='fanout')

2 channel.basic_publish(exchange=‘ ', routing_key='hello', body=message)

Routing message

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1 String message “This is a message”;

2 channel.queue_bind(exchange=exchange_name,

queue=queue_name, routing_key='black')

3 channel.exchange_declare(exchange='direct_logs', type='direct')

4 channel.basic_publish(exchange=‘direct_logs’,

routing_key=severity, body=message)

Pattern message

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Routing Rule

Routing rule= Domain. ID• # one section matched• * any section

Example :

Name

Routing

Cosa.user.id156486 Cosa.group

Cosa.* O O

Cosa.# X O

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1 String message “This is a message”;

2 channel.queue_bind(exchange=exchange_name,

queue=queue_name, routing_key=‘*.black.#’)

PRC

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1 String message “This is a message”;

2 ch.basic_publish(exchange='', routing_key=props.reply_to, properties=pika.BasicProperties(correlation_id = \ props.correlation_id), body=str(response))

3 ch.basic_ack(delivery_tag)

Web Service Post• Provide web push function thought web service.

Var Description Type

Domain *Domain Name String

ExName *Exchange Name String

ID

(null for broadcast)

ID String

Msg *Message String

Durable

(Default False)

Durable Bool

Ack

(Default True)

No Ack require Bool

Auth *Authentication

(Get form SSO)

String* Required

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Web Service Response Code

Var Description

200 Message sant

401 Not authorize.

404 Domain or exchange not exist

406 Not Acceptable

500 Service is busy or maintain.

* Required

• Response code

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‹#›

Summary

• Push server is …– A style of Internet-based communication where

the request for a given transaction is initiated by the publisher or central server.

• Rabbit MQ is– Aopen source message broker software (i.e.,

message-oriented middleware) that implements the Advanced Message Queuing Protocol (AMQP) standard.

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Q & A

Thank you.

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