Week 13

Observability Overview

Logging

Debugging with Logs

Observability Tools

Practice

Assignment

Back end Track

Under construction

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Implementation plan:

  1. Why logging matters in production — you can't attach a debugger
  2. What to log: requests, errors, important business events
  3. What NOT to log: passwords, tokens, PII (GDPR awareness)
  4. Log levels: INFO, WARN, ERROR, DEBUG, TRACE
  5. Choosing the right log level
  6. Logging in Spring Boot: SLF4J + Logback (default)
  7. Using the Logger in code: logger.info(), logger.error()
  8. Configuring log levels in application.properties
  9. Structured logging (brief awareness)
  10. Exercise: add meaningful logging to an existing service

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