Book Image

RabbitMQ Cookbook

Book Image

RabbitMQ Cookbook

Overview of this book

RabbitMQ is an open source message broker software (sometimes called message-oriented middleware) that implements the Advanced Message Queuing Protocol (AMQP). The RabbitMQ server is written in the Erlang programming language and is built on the Open Telecom Platform framework for clustering and failover. Messaging enables software applications to connect and scale. Applications can connect to each other as components of a larger application or to user devices and data. RabbitMQ Cookbook touches on all the aspects of RabbitMQ messaging. You will learn how to use this enabling technology for the solution of highly scalable problems dictated by the dynamic requirements of Web and mobile architectures, based for example on cloud computing platforms. This is a practical guide with several examples that will help you to understand the usefulness and the power of RabbitMQ. This book helps you learn the basic functionalities of RabbitMQ with simple examples which describe the use of RabbitMQ client APIs and how a RabbitMQ server works. You will find examples of RabbitMQ deployed in real-life use-cases, where its functionalities will be exploited combined with other technologies. This book helps you understand the advanced features of RabbitMQ that are useful for even the most demanding programmer. Over the course of the book, you will learn about the usage of basic AMQP functionalities and use RabbitMQ to let decoupled applications exchange messages as per enterprise integration applications. The same building blocks are used to implement the architecture of highly scalable applications like today's social networks, and they are presented in the book with some examples. You will also learn how to extend RabbitMQ functionalities by implementing Erlang plugins. This book combines information with detailed examples coupled with screenshots and diagrams to help you create a messaging application with ease.
Table of Contents (19 chapters)
RabbitMQ Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Debugging using Wireshark


In the Debugging RabbitMQ's messages recipe, we have seen how to trace messages going to/from RabbitMQ.

However, it is not always possible, or desirable, to stop a running client (or a RabbitMQ server), modify its connection port, and point it to a different one; we just want to monitor the messages that are passing in real-time, impacting the system activity as little as possible.

Tip

However, it's possible to activate the firehose tracer as seen in the recipe, Tracing RabbitMQ's ongoing activity.

Wireshark is a free network analysis tool that has the capability to decode AMQP messages. This tool can be used either on the client side or on the server side to monitor the AMQP traffic flow seamlessly.

Getting ready

To exercise this recipe, you need RabbitMQ up and running and the RabbitMQ Java client library.

How to do it...

In the following steps, we are going to see how to use Wireshark to trace the AMQP messages:

  1. If not already available on your system, download and install...