1. Evolution of Microservice Architecture
Migrating from monolithic applications to microservice architecture has been a hot topic in recent years. Go, with its lightweight goroutine model and excellent concurrency support, has become a popular choice for building microservices.
2. API Contract Design
In microservice architecture, APIs are the core of inter-service communication. We use Protocol Buffers for interface definition.
Core Code: gRPC Service Definition
package service
import (
"context"
"log"
"net"
"google.golang.org/grpc"
pb "github.com/example/proto"
)
type UserServer struct {
pb.UnimplementedUserServiceServer
}
func (s *UserServer) GetUser(ctx context.Context, req *pb.GetUserRequest) (*pb.User, error) {
return &pb.User{
Id: req.Id,
Name: "alice",
Email: "alice@example.com",
}, nil
}
func main() {
lis, _ := net.Listen("tcp", ":8080")
srv := grpc.NewServer()
pb.RegisterUserServiceServer(srv, &UserServer{})
log.Fatal(srv.Serve(lis))
}
go
package service
import (
"context"
"log"
"net"
"google.golang.org/grpc"
pb "github.com/example/proto"
)
type UserServer struct {
pb.UnimplementedUserServiceServer
}
func (s *UserServer) GetUser(ctx context.Context, req *pb.GetUserRequest) (*pb.User, error) {
return &pb.User{
Id: req.Id,
Name: "alice",
Email: "alice@example.com",
}, nil
}
func main() {
lis, _ := net.Listen("tcp", ":8080")
srv := grpc.NewServer()
pb.RegisterUserServiceServer(srv, &UserServer{})
log.Fatal(srv.Serve(lis))
}