RabbitMQ tutorials

This directory contains the RabbitMQ tutorials, ported to amqplib. The sub-directory callback_api has translations of the tutorial programs to the callback-oriented API.

Preparation

To run the tutorial code, you need amqplib installed. Assuming you are in a clone of the amqplib repository, from the tutorials directory:

npm install

or to use the latest released version,

npm install amqplib

Then just run each file as a script, e.g., in bash

./send.js

or

node send.js

or

nave use 0.8 node send.js

Tutorial one: Hello World!

A “Hello World” example, with one script sending a message to a queue, and another receiving messages from the same queue.

• send.js
• receive.js

Tutorial two: Work queues

Using RabbitMQ as a work queue; new_task creates a task, and worker processes tasks. Multiple worker process will share the tasks among them. Long-running tasks are simulated by supplying a string with dots, e.g., ‘...’ to new_task. Each dot makes the worker “work” for a second.

• new_task.js
• worker.js

Tutorial three: Publish/Subscribe

Using RabbitMQ as a broadcast mechanism. emit_log sends a “log” message to a fanout exchange, and all receive_logs processes receive log messages.

• emit_log.js
• receive_logs.js

Tutorial four: Routing

Using RabbitMQ as a routing (‘somecast’) mechanism. emit_log_direct sends a log message with a severity, and all receive_logs_direct processes receive log messages for the severities on which they are listening.

• emit_log_direct.js
• receive_logs_direct.js

Tutorial five: Topics

Extends the previous tutorial to routing with wildcarded patterns.

• emit_log_topic.js
• receive_logs_topic.js

Tutorial six: RPC

Using RabbitMQ as an RPC intermediary, queueing requests for servers and routing replies back to clients.

• rpc_server.js
• rpc_client.js

I depart slightly from the original tutorial code, which I think has some needless object-orientation (in the Python code; you don't get a choice about needless object-orientation in Java).