How do I propagate context through function calls?

In Go, context propagation is a crucial practice that allows for cancellation signals, deadlines, and other request-scoped values to be passed through function calls effectively. This mechanism is particularly useful in concurrent programming and web server applications.

Go, context propagation, function calls, concurrency, web server, request-scoped values

This HTML code provides an overview of how to propagate context through function calls in Go, emphasizing its importance in handling concurrent requests and managing resources efficiently.

            // Example in Go to propagate context through function calls

            package main

            import (
                "context"
                "fmt"
                "time"
            )

            // Function that takes context as an argument
            func processRequest(ctx context.Context) {
                select {
                case <-time.After(2 * time.Second):
                    fmt.Println("Request processed")
                case <-ctx.Done():
                    fmt.Println("Request cancelled:", ctx.Err())
                }
            }

            func main() {
                // Create a context with a timeout
                ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
                defer cancel() // Ensure resources are cleaned up

                // Call the function with the context
                processRequest(ctx)
            }

Go context propagation function calls concurrency web server request-scoped values

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