Book Image

Learning RabbitMQ

By : Martin Toshev
Book Image

Learning RabbitMQ

By: Martin Toshev

Overview of this book

RabbitMQ is Open Source Message Queuing software based on the Advanced Message Queue Protocol Standard written in the Erlang Language. RabbitMQ is an ideal candidate for large-scale projects ranging from e-commerce and finance to Big Data and social networking because of its ease of use and high performance. Managing RabbitMQ in such a dynamic environment can be a challenging task that requires a good understanding not only of how to work properly with the message broker but also of its best practices and pitfalls. Learning RabbitMQ starts with a concise description of messaging solutions and patterns, then moves on to concrete practical scenarios for publishing and subscribing to the broker along with basic administration. This knowledge is further expanded by exploring how to establish clustering and high availability at the level of the message broker and how to integrate RabbitMQ with a number of technologies such as Spring, and enterprise service bus solutions such as MuleESB and WSO2. We will look at advanced topics such as performance tuning, secure messaging, and the internals of RabbitMQ. Finally we will work through case-studies so that we can see RabbitMQ in action and, if something goes wrong, we'll learn to resolve it in the Troubleshooting section.
Table of Contents (18 chapters)
Learning RabbitMQ
About the Author
About the Reviewers

High level architecture of RabbitMQ

We already discussed a lot of details about how the message broker works. We discussed that RabbitMQ instances are Erlang applications that communicate with each other by means of Erlang message passing with the help of a shared Erlang cookie that is used to allow communication between endpoints. As every system that provides a server and one or more clients for different platforms, we could easily guess that before an AMQP message is sent to the broker, an AMQP client opens a TCP socket using the utilities that are provided by the particular programming language in which it writes the AMQP data. The most interesting part is what happens when the message arrives at the message broker. Once the message broker receives the AMQP message, it needs to parse and process it, accordingly. If we take a closer look at what the rabbitmq-server script executes, we will notice that several actions take place, as follows:

  • The start method from the rabbit_prelaunch module...