Golang RPC调用例子程序(实现超时机制)

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@H_403_0@package main import ( "fmt" "log" "net" "net/rpc" "time" ) func main() { log.SetFlags(log.Lshortfile | log.Lmicroseconds) log.Println("=======begin====== ") testRpc() time.Sleep(time.Second * 2) log.Println("=======end====== ") } type Args struct { A,B int } type Math int func (t *Math) Division(args *Args,reply *int) error { if args.B == 0 { return fmt.Errorf("args.B == 0") } *reply = args.A / args.B //time.Sleep(time.Second * 3) return nil } func testRpc() { newServer := rpc.NewServer() newServer.Register(new(Math)) server,_ := net.Listen("tcp","127.0.0.1:1234") // any available address go newServer.Accept(server) time.Sleep(1 * time.Second) conn,_ := net.DialTimeout("tcp","127.0.0.1:1234",time.Second) defer conn.Close() conn.SetReadDeadline(time.Now().Add(time.Second * 1)) client := rpc.NewClient(conn) defer client.Close() reply := new(int) callErr := client.Call("Math.Division",&Args{8,2},reply) log.Println("call err:",callErr,"reply:",*reply) }

  • 采用低层次的api,可以设置一些超时时间,比如连接超时、读写超时等
  • rpc要对返回值进行判断,不仅仅判断远程调用错误吗,还有其他一些异常情况的判断,包括调用超时,service没有注册,没有找到相应的method等。

args.B == 0 rpc: can’t find service Math_test.Divisio rpc: can’t find method Math.Division_test read tcp 127.0.0.1:30624->127.0.0.1:1234: i/o timeout

原文链接:https://www.f2er.com/go/188952.html

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