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main.go
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main.go
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// Copyright 2021 CloudWeGo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package main
import (
"context"
"github.com/cloudwego/kitex-examples/kitex_gen/api"
"github.com/cloudwego/kitex-examples/kitex_gen/api/echo"
"github.com/cloudwego/kitex/client"
"log"
"strings"
"time"
)
func NewFuture(f func() (interface{}, error)) func() (interface{}, error) {
var res interface{}
var err error
c := make(chan struct{}, 1)
go func() {
defer close(c)
res, err = f()
}()
return func() (interface{}, error) {
<-c
return res, err
}
}
func sequentialCall(client echo.Client) {
for i := 1; i < 5; i++ {
var req = &api.Request{Message: "my request"}
resp, err := client.Echo(context.Background(), req)
if err != nil {
log.Fatal(err)
}
log.Println(resp)
}
}
func asyncParallelCall(client echo.Client) {
var futures []func() (interface{}, error)
for i := 0; i < 5; i++ {
var req = &api.Request{Message: "my request"}
futures = append(futures, NewFuture(func() (interface{}, error) {
return client.Echo(context.Background(), req)
}))
}
for i := 0; i < 5; i++ {
resp, err := futures[i]()
if err != nil {
log.Fatal(err)
}
log.Println(resp)
}
}
func main() {
client, err := echo.NewClient("echo", client.WithHostPorts("[::1]:8888"))
if err != nil {
log.Fatal(err)
}
log.Println(strings.Repeat("=", 10))
log.Println("sequential call")
t0 := time.Now()
sequentialCall(client)
log.Println("cast time: " + time.Since(t0).String())
log.Println(strings.Repeat("=", 10))
log.Println("async parallel call")
t1 := time.Now()
asyncParallelCall(client)
log.Println("cast time: " + time.Since(t1).String())
}