How do I handle graceful restarts with Gin in Go?

To handle graceful restarts with Gin in Go, you can utilize the built-in capabilities of the Go runtime along with some additional techniques. This will allow your application to restart without dropping any pending requests.

One common approach is to use a signal handler to intercept termination signals and gracefully shut down the Gin server before the application terminates. This can be achieved with the `http.Server.Shutdown` method, which gracefully shuts down the server by completing all active connections.

Here is an example of how to implement graceful restarts in a Gin application:


package main

import (
    "context"
    "fmt"
    "net/http"
    "os"
    "os/signal"
    "syscall"
    "time"

    "github.com/gin-gonic/gin"
)

func main() {
    router := gin.Default()

    router.GET("/", func(c *gin.Context) {
        c.JSON(http.StatusOK, gin.H{"message": "Hello, World!"})
    })

    srv := &http.Server{
        Addr:    ":8080",
        Handler: router,
    }

    // Channel to listen for interrupt signals
    quit := make(chan os.Signal, 1)
    signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)

    // Start the server in a goroutine
    go func() {
        if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
            fmt.Printf("Listen: %s\n", err)
        }
    }()

    fmt.Println("Server is ready to handle requests at :8080")

    // Blocking until we receive a signal
    <-quit
    fmt.Println("Shutting down the server...")

    // Create a deadline for server shutdown
    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
    defer cancel()
    if err := srv.Shutdown(ctx); err != nil {
        fmt.Printf("Server forced to shutdown: %v", err)
    }

    fmt.Println("Server exiting")
}

How do I handle graceful restarts with Gin in Go?

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How do I handle graceful restarts with Gin in Go?

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