Implementation Details with NATS

Publishing Messages

To publish the messages:

• Create the Publisher Service: This service will have the method to the send messages to the specified NATS subject.
• Use the NATS connection: We can utilize the NATS connection to publish the messages. The method can takes the subject and message content and converting the content to bytes if necessary and sends it over the network.

Subscribing to Messages

For subscribing to messages:

• Create the Subscriber Service: This service can sets up the subscriptions to the listen for the messaging on specified subjects.
• Handling the messages: Define how received the messages should be processed. It can typically involves the converting the message bytes back to the String format and then executing the business logic.

Microservices architectures enable the development of scalable and independent services within the system, promoting agility and robustness. Communication between these services is crucial for the overall performance and functionality of the application. NATS is a high-performance messaging system that is ideal for the microservices architecture due to its simplicity, scalability, and speed. It supports various communication patterns and it can include request-reply and publish-subscribe.

NATS server can provide lightweight and flexible messaging that is perfect for the microservices talking to each other asynchronously. It supports the various messaging models, but we will focus primarily on the publish-subscribe model.