context/triple/go-client/cmd/client.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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"
	"sync"
)

import (
	"dubbo.apache.org/dubbo-go/v3/common/constant"
	"dubbo.apache.org/dubbo-go/v3/config"
	_ "dubbo.apache.org/dubbo-go/v3/imports"

	"github.com/dubbogo/gost/log/logger"
)

import (
	"github.com/apache/dubbo-go-samples/api"
)

var grpcGreeterImpl = new(api.GreeterClientImpl)

func init() {
	config.SetConsumerService(grpcGreeterImpl)
}

// export DUBBO_GO_CONFIG_PATH= PATH_TO_SAMPLES/helloworld/go-client/conf/dubbogo.yml
func main() {
	err := config.Load()
	if err != nil {
		panic(err)
	}

	logger.Info("start to test triple unary context attachment transport")
	req := &api.HelloRequest{
		Name: "laurence",
	}
	ctx := context.Background()
	// set user defined context attachment, map value can be string or []string, otherwise it is not to be transferred
	userDefinedValueMap := make(map[string]interface{})
	userDefinedValueMap["key1"] = "user defined value 1"
	userDefinedValueMap["key2"] = "user defined value 2"
	userDefinedValueMap["key3"] = []string{"user defined value 3.1", "user defined value 3.2"}
	userDefinedValueMap["key4"] = []string{"user defined value 4.1", "user defined value 4.2"}
	ctx = context.WithValue(ctx, constant.AttachmentKey, userDefinedValueMap)
	reply, err := grpcGreeterImpl.SayHello(ctx, req)
	if err != nil {
		logger.Error(err)
	}
	logger.Infof("client response result: %v\n", reply)

	//stream rpc
	logger.Info("start to test triple streaming rpc context attachment transport")
	request := &api.HelloRequest{
		Name: "laurence",
	}
	stream, err := grpcGreeterImpl.SayHelloStream(ctx)
	if err != nil {
		logger.Error(err)
	}
	// stream grpc双向流式发送
	err = stream.Send(request)
	if err != nil {
		logger.Error(err)
	}
	logger.Infof("client stream send request: %v\n", request)

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()
		reply, err := stream.Recv()
		if err != nil {
			logger.Error(err)
		}
		logger.Infof("client stream received result: %v\n", reply)
	}()
	wg.Wait()
}