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

Client high availability

Now that we have seen how to establish high availability at the level of the broker along with some mechanisms to improve reliability when publishing/consuming messages, we have to explore what mechanisms we have to ensure client reliability in the event of broker failures.

Client reconnections

Later versions of the RabbitMQ Java client provide a mechanism for handling automatic recovery in the event of connection failures with the broker. In earlier versions of the client this has to be done manually or with the help of a wrapper library that provides recovery on top of an existing RabbitMQ client (there are various implementations in the public space). Recovery via the Java client API is enabled with a single line of code:


The preceding method invoked on a RabbitMQ connection factory does a number of things in the context of a publisher/consumer connection, such as reopening channels, recovering consumers, restoring connection...