/
client.go
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/
client.go
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/*
* 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 grpc
import (
"reflect"
"strconv"
)
import (
"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
"github.com/opentracing/opentracing-go"
"google.golang.org/grpc"
"gopkg.in/yaml.v2"
)
import (
"github.com/apache/dubbo-go/common"
"github.com/apache/dubbo-go/common/constant"
"github.com/apache/dubbo-go/common/logger"
"github.com/apache/dubbo-go/config"
)
var (
clientConf *ClientConfig
)
func init() {
// load clientconfig from consumer_config
consumerConfig := config.GetConsumerConfig()
clientConfig := GetClientConfig()
clientConf = &clientConfig
// check client config and decide whether to use the default config
defer func() {
if clientConf == nil || len(clientConf.ContentSubType) == 0 {
defaultClientConfig := GetDefaultClientConfig()
clientConf = &defaultClientConfig
}
if err := clientConf.Validate(); err != nil {
panic(err)
}
}()
if consumerConfig.ApplicationConfig == nil {
return
}
protocolConf := config.GetConsumerConfig().ProtocolConf
if protocolConf == nil {
logger.Info("protocol_conf default use dubbo config")
} else {
grpcConf := protocolConf.(map[interface{}]interface{})[GRPC]
if grpcConf == nil {
logger.Warnf("grpcConf is nil")
return
}
grpcConfByte, err := yaml.Marshal(grpcConf)
if err != nil {
panic(err)
}
err = yaml.Unmarshal(grpcConfByte, clientConf)
if err != nil {
panic(err)
}
}
}
// Client is gRPC client include client connection and invoker
type Client struct {
*grpc.ClientConn
invoker reflect.Value
}
// NewClient creates a new gRPC client.
func NewClient(url *common.URL) (*Client, error) {
// if global trace instance was set , it means trace function enabled. If not , will return Nooptracer
tracer := opentracing.GlobalTracer()
dialOpts := make([]grpc.DialOption, 0, 4)
maxMessageSize, _ := strconv.Atoi(url.GetParam(constant.MESSAGE_SIZE_KEY, "4"))
//consumer config client connectTimeout
connectTimeout := config.GetConsumerConfig().ConnectTimeout
dialOpts = append(dialOpts, grpc.WithInsecure(), grpc.WithBlock(), grpc.WithTimeout(connectTimeout), grpc.WithUnaryInterceptor(
otgrpc.OpenTracingClientInterceptor(tracer, otgrpc.LogPayloads())),
grpc.WithDefaultCallOptions(
grpc.CallContentSubtype(clientConf.ContentSubType),
grpc.MaxCallRecvMsgSize(1024*1024*maxMessageSize),
grpc.MaxCallSendMsgSize(1024*1024*maxMessageSize)))
conn, err := grpc.Dial(url.Location, dialOpts...)
if err != nil {
logger.Errorf("grpc dail error: %v", err)
return nil, err
}
key := url.GetParam(constant.BEAN_NAME_KEY, "")
impl := config.GetConsumerService(key)
invoker := getInvoker(impl, conn)
return &Client{
ClientConn: conn,
invoker: reflect.ValueOf(invoker),
}, nil
}
func getInvoker(impl interface{}, conn *grpc.ClientConn) interface{} {
var in []reflect.Value
in = append(in, reflect.ValueOf(conn))
method := reflect.ValueOf(impl).MethodByName("GetDubboStub")
res := method.Call(in)
return res[0].Interface()
}