Mahib's Margins https://mahibulhaque.me Recent content on Mahib's Margins en Supervised fire-and-forget in Go https://mahibulhaque.me/blog/go/supervised-fire-and-forget/ https://mahibulhaque.me/blog/go/supervised-fire-and-forget/ Sat, 25 Jul 2026 00:00:00 GMT A bounded worker pool for small background tasks, with task-owned contexts, panic recovery, and graceful shutdown. Modernizers & go fix https://mahibulhaque.me/blog/go/gofix/ https://mahibulhaque.me/blog/go/gofix/ Sat, 04 Jul 2026 00:00:00 GMT Go 1.26 rebuilt go fix on the analysis framework. It modernizes your code and respects the Go version your module declares. The post covers the modernizers, the bigger x/tools suite, and what //go:fix inline can and can't migrate. Peeking into Go struct tags https://mahibulhaque.me/blog/go/struct-tags/ https://mahibulhaque.me/blog/go/struct-tags/ Sat, 18 Apr 2026 00:00:00 GMT A quick tour of Go struct tags: how different libraries use them, how you read them at runtime with reflection, and how other tools read them at build time instead. What canceled my Go context? https://mahibulhaque.me/blog/go/context-cancellation-cause/ https://mahibulhaque.me/blog/go/context-cancellation-cause/ Tue, 24 Feb 2026 00:00:00 GMT How Go 1.20's WithCancelCause and Go 1.21's WithTimeoutCause let you attach a reason to context cancellation, plus a gotcha with manual cancel and the stdlib pattern that covers every path. Revisiting interface segregation in Go https://mahibulhaque.me/blog/go/interface-segregation/ https://mahibulhaque.me/blog/go/interface-segregation/ Sat, 01 Nov 2025 00:00:00 GMT Apply SOLID's Interface Segregation Principle in Go with consumer-defined contracts. Learn why small interfaces and implicit implementation matter. Let the domain guide your application structure https://mahibulhaque.me/blog/go/app-structure/ https://mahibulhaque.me/blog/go/app-structure/ Sat, 20 Sep 2025 00:00:00 GMT Organize Go apps by domain, not technology. Learn why models/controllers structure hurts and how bounded contexts create better separation. Early return and goroutine leak https://mahibulhaque.me/blog/go/early-return-and-goroutine-leak/ https://mahibulhaque.me/blog/go/early-return-and-goroutine-leak/ Sun, 07 Sep 2025 00:00:00 GMT Prevent goroutine leaks caused by early returns with unbuffered channels. Learn buffering, draining, errgroup patterns, and goleak testing. Gateway pattern for external service calls https://mahibulhaque.me/blog/go/gateway-pattern/ https://mahibulhaque.me/blog/go/gateway-pattern/ Sun, 03 Aug 2025 00:00:00 GMT Separate business logic from external service calls using the Gateway pattern. Apply dependency inversion and interface segregation in Go. Why does Go's io.Reader have such a weird signature? https://mahibulhaque.me/blog/go/io-reader-signature/ https://mahibulhaque.me/blog/go/io-reader-signature/ Sat, 08 Feb 2025 00:00:00 GMT Understand why io.Reader takes a byte slice parameter instead of returning one. Learn about heap allocations and buffer reuse in Go streams. Behind the blog https://mahibulhaque.me/blog/misc/behind-the-blog/ https://mahibulhaque.me/blog/misc/behind-the-blog/ Tue, 15 Oct 2024 00:00:00 GMT How Mahib's Margins is built with Astro, Markdown, React, Tailwind CSS, GitHub Actions, GitHub Pages, Cloudflare, and R2. Writing a circuit breaker in Go https://mahibulhaque.me/blog/go/circuit-breaker/ https://mahibulhaque.me/blog/go/circuit-breaker/ Sun, 06 Oct 2024 00:00:00 GMT Build a production-ready circuit breaker in Go from scratch with closed, open, and half-open states to prevent cascading failures. Dysfunctional options pattern in Go https://mahibulhaque.me/blog/go/dysfunctional-options-pattern/ https://mahibulhaque.me/blog/go/dysfunctional-options-pattern/ Wed, 06 Mar 2024 00:00:00 GMT Discover a simpler alternative to functional options: method chaining with builder-style configuration that's 76x faster and easier to understand. Configuring options in Go https://mahibulhaque.me/blog/go/configure-options/ https://mahibulhaque.me/blog/go/configure-options/ Tue, 05 Sep 2023 00:00:00 GMT Compare three Go option patterns: exposed structs, option constructors, and functional options. Learn when to use each for clean APIs. Limit goroutines with buffered channels https://mahibulhaque.me/blog/go/limit-goroutines-with-buffered-channels/ https://mahibulhaque.me/blog/go/limit-goroutines-with-buffered-channels/ Wed, 23 Aug 2023 00:00:00 GMT Control goroutine concurrency with buffered channels as semaphores. Prevent resource exhaustion with backpressure patterns in Go workers. Interface guards in Go https://mahibulhaque.me/blog/go/interface-guards/ https://mahibulhaque.me/blog/go/interface-guards/ Fri, 18 Aug 2023 00:00:00 GMT Use compile-time interface guards to verify type conformity in Go without runtime overhead. Learn the var _ Interface = (*Type)(nil) pattern. Go structured logging with slog https://mahibulhaque.me/blog/go/structured-logging-with-slog/ https://mahibulhaque.me/blog/go/structured-logging-with-slog/ Thu, 10 Aug 2023 00:00:00 GMT Master Go 1.21's log/slog package for structured logging with levels, JSON output, and attribute grouping. No third-party libraries needed.