panichandler

panichandler is an interceptor to protect a process from aborting by panic and return Internal error as status code.

Usage

import (
	"github.com/mercari/go-grpc-interceptor/panichandler"
)

func main() {
	uIntOpt := grpc.UnaryInterceptor(panichandler.UnaryServerInterceptor)
	sIntOpt := grpc.StreamInterceptor(panichandler.StreamServerInterceptor)
	grpc.NewServer(uIntOpt, sIntOpt)
}

Custom Panic Handler

You can write custom panic handler in case of panic. Use InstallPanicHandler.

func main() {
	panichandler.InstallPanicHandler(func(ctx context.Context, r interface{}) {
		fmt.Printf("panic happened: %v", r)
	}
}

Built-in custom panic handler

• panichandler.LogPanicDump
• debug.Stack() to stderr
• glog.LogPanicStackMultiLine
  • show stack trace in multi line by glog
• zap.LogPanicWithStackTrace
  • use zap.Logger in context and log panic with stack trace