Summary
In this chapter, we explored best practices for building scalable microservices with NestJS, focusing on effective testing and debugging techniques.
We began by identifying common issues that arise in microservice communication, such as connection failures, unreliable event emissions, and inconsistent data. We then walked through practical solutions to debug these issues using tools such as environment variables, retry mechanisms, and DLQs, ensuring more robust and resilient service communication.
Next, we discussed the importance of ensuring data consistency across distributed services, introducing patterns such as sagas and the transactional outbox to maintain consistency in the face of failures. These techniques are essential for handling inter-service communication in real-world applications.
We also addressed the challenges of performance bottlenecks in microservices by demonstrating ways to optimize inter-service communication using batching, asynchronous processing...
