In this tutorial, we will explore the use of Spring AMQP to communicate with the RabbitMQ messaging middleware. All the previous article code examples are based on the RabbitMQ-Java-Client library. Spring AMQP also makes use of the same library, however, it provides a practical oriented approach to communicate with RabbitMQ. If you are already familiar with Spring stack, then you [...]
Complete RabbitMQ Tutorial in Java with Spring Boot example This is a RabbitMQ Course in Java with asynchronous messaging examples using rabbitmq-java-client, Spring Boot and Spring AMQP. This is a programming course, it focuses more on the asynchronous programming than the admin UI. I have tried to keep the tutorial up-to-date with the latest Java trends. Code Examples [...]
You will learn to collect rejected messages in RabbitMQ. There can be several reasons to do that, for example, to track down the spammers in an Open CRM system. We will learn this with an example of a Topic Exchange, please check the previous article on Topic Exchange if you are new to RabbitMQ. What is Alternate Exchange? There will [...]
It is possible to bind an Exchange to another Exchange just like Exchanges to Queues bindings. An exchange can be bound with another exchange with the source routing rules. The destination exchange finally routes the messages to the Queues bound to it. We will take 2 Exchanges as an example, home-direct-exchange as source and linked-direct-exchange as the destination exchange. The [...]
Default Exchange in RabbitMQ is not a special type of Exchange in RabbitMQ like Direct Exchange or Topic Exchange. It is a special Direct Exchange with an empty name. In the Elements of AMQP article, you have sent a message directly to a Queue using the empty Exchange name. This is where Default Exchange comes to play. The below image [...]
Headers Exchange Type is the most powerful exchange type in AMQP (RabbitMQ). Headers exchanges route a message based on the message headers matching, they ignore routing keys. The diagram here represents 3 Queues (HealthQ, SportsQ, and EducationQ) are bound to the Headers Exchange (my-header-exchange) with JSON like headers. We will discuss each of these headers below in detail. The flow [...]
This article focuses on the Topic Exchange type (amq.topic) in RabbitMQ. You will learn to bind a Queue with a Topic Exchange using a routing key pattern. You have already learned about Exchanges and Queues in the Elements of RabbitMQ. The diagram here explains a producer sends a message to my-topic-exchange , there are 3 Queues bound to this exchange [...]
This article focuses on the Fanout Exchange type (amq.fanout) in RabbitMQ. You will learn to bind a Queue with a Fanout Exchange using an empty routing key. You have already learned about Exchanges and Queues in the Elements of RabbitMQ. The diagram here explains a producer sends a message to my-fanout-exchange , and it is forwarded to all 3 Queues [...]
This article focuses on the Direct Exchange type (amq.direct) in RabbitMQ. You will learn to bind a Queue with an Exchange using a routing key. You have already learned about Exchanges and Queues in the Elements of RabbitMQ. The diagram here explains a producer sends a message to my-direct-exchange , there are 3 Queues bound to this exchange with 3 [...]
In this article, you will learn to set up a RabbitMQ server for the development purpose using docker-compose. We will download the official rabbitmq docker image, run it. Prerequisites Docker, minimum installed version - 2.0. Docker-compose, minimum installed version - 1.23. Installation of RabbitMQ - docker-compose Step-1) Make sure you have the docker installed in your system by running the [...]
