error-handling-guide

Consistent error handling in Go microservices requires structured patterns with custom domain error types, error wrapping using %w for context propagation, and mapping errors to HTTP statuses. This approach ensures predictable error propagation and context-rich logging across API services and background workers.

Error propagation with context in Go applications is best achieved by wrapping errors using the %w verb. This structured error wrapping preserves the original error chain while adding contextual information, enabling reliable error tracing and consistent logging throughout service layers.

Mapping custom domain errors to HTTP status codes involves defining specific error types and wiring a MapErrorToHTTPStatus function into your HTTP handlers. This translates domain-specific errors into appropriate HTTP responses, ensuring clients receive accurate status codes for API failures.

Recovering from panics in Go goroutines requires implementing PanicRecoveryMiddleware within your concurrent tasks. This safe recovery mechanism intercepts runtime panics, preventing goroutine crashes and allowing background workers to maintain operational stability during unexpected failures.

Retry logic with exponential backoff for Go background workers is implemented using dedicated retry helpers. These helpers automatically re-execute failed operations with increasing delays, providing resilient error recovery for transient failures in microservices and concurrent processing tasks.

Yes, this structured error-handling approach applies directly to API services, microservices, and background workers. It provides domain-specific error types, panic recovery, and consistent error logging, ensuring safe and predictable error propagation across various Go application architectures.