When and why should you use RabbitMQ?
It has been seen that developers today choose a microservice structure compared to a monolithic structure for their applications. To understand why? We must take a closer look into Message Queuing and the perks of using RabbitMQ as a message broker in a microservice architecture. This blog will discuss the correlation between a microservice system and message queue usage to answer the question: why should one use RabbitMQ in a microservice architecture?
Let’s look at the main difference between monolith & microservices, Monolithic architecture is large, complex, and tightly coupled, with the entire functionality contained in a single system. This kind of architecture comes with several downsides, the first of which is that it is difficult to maintain. Making small changes to a monolith architecture may affect the whole system, which can cause a range of issues. Going for a microservice architecture instead solves this by separating functionality into standalone components. Which makes it easier to add, change, or remove functionality without affecting other parts of the architecture.
Most industries are looking to implement microservices architecture since it provides a more agile approach to software development and maintenance. For example; if an online shopping store suddenly fails to send out receipts via email. Maybe the process responsible for this task crashes, then it will not cause trouble in other parts of the system. Tasks/messages sent to the microservice “send email receipt” will simply be put on the queue until the microservice is back online, and the rest of the store can continue operating as usual the entire time.
In a microservice architecture, Cross dependencies are central to their mechanism such that no single service can perform without getting help from other services. To establish connection between these microservices different services are used:
- Brokers (eg. RabbitMQ)
- Remote Procedure Calls (RPC)
- REST APIS
The Job of the message broker is to act as a postman for the microservices. Using RabbitMQ message broker, messages are not published directly to a queue. Instead, the producer sends a message to an exchange. The job of an exchange is to accept messages from the producer applications and route them to the correct message queues. Hence enabling asynchronous processing, meaning that it allows you to put a message in a queue without processing it immediately. RabbitMQ is therefore ideal for long-running tasks or blocking tasks, allowing web servers to respond quickly to requests instead of being forced to perform computationally intensive tasks on the spot.
If you’re looking to create a versatile and reliable industry specific application with the most robust message broker, RabbitMQ is a good option. The RabbitMQ community is strong and growing and you can find a lot of documentation and support which is crucial when working with high functionality software. Therefore do not delay your journey to create the best microservice based application like Netflix, Parkster, FarmBot and many others. Learn RabbitMQ now at RE2 Programming from the very best!
– Aditya Singh