Summary

This chapter explored the essential practices and tools for effective code monitoring and maintenance, focusing on ensuring long-term performance, reliability, security, and scalability. We began with an overview of APM tools, detailing their key features such as real-time monitoring, transaction tracing, error tracking, and user experience monitoring. Popular APM tools for Java were reviewed, along with best practices for their implementation and use.

We emphasized the importance of code reviews for the goal of maintaining high-quality code. We covered best practices, detailed the peer review process, and shared common pitfalls, offering avoidance solutions.

The concept of logging was examined, starting with the fundamentals, including log levels, messages, and targets. We outlined best practices for effective logging, such as using appropriate levels, avoiding sensitive information, and centralizing logs. We also introduced popular logging frameworks for Java and discussed...