17 feature add graceful shutdown to api and waitgroup

[maneesha-xyz]

Description

Refactor main.go into server.go. Added graceful shutdown.

Type of Change

• Bug fix
• New feature
• Documentation update
• Code refactoring
• Other (please describe):

Changes Made

• Added graceful shutdown to api-server.

Testing

Uncomment the 4 second delay in the health endpoint to test it.

Checklist

• My code follows the project's coding standards
• I have tested my changes
• I have updated the documentation (if needed)
• My changes don't introduce new warnings or errors

Related Issues

Fixes #17

[gemini-code-assist]

Summary of Changes

Hello @maneeshaxyz, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a significant enhancement to the API server by implementing graceful shutdown capabilities. This ensures that the server can shut down cleanly without abruptly terminating active connections, improving the reliability and user experience of the service. Additionally, the server's initialization and startup logic have been refactored into a separate module, leading to a cleaner and more organized codebase.

Highlights

• Graceful Shutdown: Implemented graceful shutdown for the API server, allowing it to gracefully terminate ongoing requests upon receiving SIGINT or SIGTERM signals.
• Code Refactoring: Refactored the server startup and configuration logic from main.go into a new dedicated file, server.go, improving modularity and maintainability.
• Testing Utility: Added a temporary commented-out time.Sleep in the health endpoint to facilitate testing of the new graceful shutdown mechanism.

Changelog

• api-server/handlers.go
  • Added a commented-out time.Sleep call to the health endpoint for testing graceful shutdown behavior.
• api-server/main.go
  • Removed the fmt package import.
  • Refactored server initialization and startup logic into a new serve method.
• api-server/server.go
  • Introduced a new serve method for the application struct.
  • Implemented graceful shutdown functionality using context and os.Signal to handle SIGINT and SIGTERM.
  • Encapsulated HTTP and HTTPS server startup logic, including error handling for http.ErrServerClosed.

Activity

• No human activity has occurred on this pull request yet.

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[maneesha-xyz]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a graceful shutdown mechanism for the API server and refactors the server startup logic into a separate server.go file. The changes are a good step towards a more robust server. I've found a critical issue in the shutdown logic that could lead to premature termination of the application. I've also identified some areas for improvement regarding error handling and code duplication, and left suggestions to address them. Additionally, there's some leftover test code that should be cleaned up before merging.

[gemini-code-assist]

Code Review

This pull request introduces a graceful shutdown mechanism for the API server and refactors the server startup logic into a new server.go file. The implementation is a good step forward. I've identified a few areas for improvement, including a critical issue with os.Exit being called from a goroutine which could lead to abrupt termination, an incomplete graceful shutdown that doesn't wait for background tasks (where a sync.WaitGroup is a suitable interim solution), some code duplication in the server startup logic, and leftover testing code. Overall, these are valuable changes. Addressing the feedback will make the implementation more robust and maintainable.

[maneesha-xyz]

/gemini review

[gemini-code-assist]

Code Review

The PR refactors the server startup logic into a dedicated serve() method and implements graceful shutdown using srv.Shutdown and signal handling. This is a good improvement for reliability. I have one recommendation regarding the use of a buffered channel to prevent a potential goroutine leak during shutdown in error scenarios. Additionally, while the PR title mentions a 'waitgroup', I didn't see any sync.WaitGroup implementation in the current changes; if background tasks are planned, you might want to add this in a future update.

[Aravinda-HWK]

LGTM