Launching the Application Using the Configuration API

1. Preparations

  • dubbo-go cli tools and dependent tools have been installed
  • Create a new demo application

2. Start the application using the configuration API

Users do not need to use configuration files, and can directly write configurations in the code in the form of API calls

2.1 Modify the server code:

func main() {
config. SetProviderService(&GreeterProvider{})
  
protocolConfig := config. NewProtocolConfigBuilder().
SetPort("20000").
SetName("tri").
build()
  
serviceConfig := config. NewServiceConfigBuilder().
SetInterface(""). // read interface from pb
build()
  
providerConfig := config. NewProviderConfigBuilder().
AddService("GreeterProvider", serviceConfig).
build()
  
rootConfig := config. NewRootConfigBuilder().
AddProtocol("triple-protocol-id", protocolConfig). // add protocol, key is custom
SetProvider(providerConfig).Build()
  
if err := config.Load(config.WithRootConfig(rootConfig)); err != nil {
panic(err)
}
select {}
}

The configuration API looks complicated, but the construction process of a single configuration structure is consistent. Referring to the design of Java Builder, we use New().SetA().SetB().Build() in the configuration API module way to construct a single configuration structure layer by layer.

Once done, the go-server/conf folder can be deleted.

2.2 Modify the client code:

go-client/cmd/client.go

func main() {
config. SetConsumerService(grpcGreeterImpl)

referenceConfig := config. NewReferenceConfigBuilder().
SetProtocol("tri").
SetURL("tri://localhost:20000").
SetInterface(""). // read interface name from pb
build()

consumerConfig := config.NewConsumerConfigBuilder().
AddReference("GreeterClientImpl", referenceConfig).
build()

rootConfig := config. NewRootConfigBuilder().
SetConsumer(consumerConfig).Build()
if err := config.Load(config.WithRootConfig(rootConfig)); err != nil {
panic(err)
}

logger.Info("start to test dubbo")
req := &api.HelloRequest{
Name: "Laurence",
}
reply, err := grpcGreeterImpl.SayHello(context.Background(), req)
if err != nil {
logger. Error(err)
}
logger.Infof("client response result: %v\n", reply)
}

Once done, the go-client/conf folder can be deleted.

2.3 Verify Config API

Start the server and client respectively to view the call information.

INFO cmd/client.go:62 client response result: name:"Hello laurence" id:"12345" age:21

Last modified January 2, 2023: Enhance Dubbogo docs (#1800) (71c8e7227)