feat grpc客户端整理

net/grpc/grpc_client/stream_gateway.go

@@ -0,0 +1,83 @@
+package grpc_client
+
+import (
+	"context"
+	"git.hlsq.asia/mmorpg/service-common/log"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/proto"
+	"strconv"
+	"sync"
+)
+
+type GatewayFun int
+
+const (
+	FunToClient GatewayFun = iota
+)
+
+var gatewayServer sync.Map // map[string]*gatewayStream
+
+type gatewayStream struct {
+	mu     sync.Mutex
+	stream grpc.ClientStream
+}
+
+func findGatewayBySID(sid string, fun GatewayFun) (*gatewayStream, error) {
+	key := gatewayKey(sid, fun)
+
+	if v, ok := gatewayServer.Load(key); ok {
+		return v.(*gatewayStream), nil
+	}
+
+	client, err := GatewayNewClient(sid)
+	if err != nil {
+		log.Errorf("findGatewayBySID cannot find client: %v", err)
+		return nil, err
+	}
+	var stream grpc.ClientStream
+	switch fun {
+	case FunToClient:
+		stream, err = client.ToClient(context.Background())
+	}
+	if err != nil {
+		log.Errorf("findGatewayBySID %v err: %v, sid: %v", fun, err, sid)
+		return nil, err
+	}
+
+	ss := &gatewayStream{stream: stream}
+	if actual, loaded := gatewayServer.LoadOrStore(key, ss); loaded {
+		go func() { _ = stream.CloseSend() }()
+		return actual.(*gatewayStream), nil
+	}
+
+	return ss, nil
+}
+
+func SendMessageToGateway(sid string, fun GatewayFun, msg proto.Message, re ...bool) error {
+	ss, err := findGatewayBySID(sid, fun)
+	if err != nil {
+		return err
+	}
+
+	ss.mu.Lock()
+	err = ss.stream.SendMsg(msg)
+	ss.mu.Unlock()
+
+	if err != nil {
+		key := gatewayKey(sid, fun)
+		if v, ok := gatewayServer.Load(key); ok && v == ss {
+			gatewayServer.Delete(key)
+			_ = ss.stream.CloseSend()
+		}
+		// 如果没有标识本次是重试的，就重试一次（默认重试）
+		if re == nil || !re[0] {
+			return SendMessageToGateway(sid, fun, msg, true)
+		}
+		return err
+	}
+	return nil
+}
+
+func gatewayKey(sid string, fun GatewayFun) string {
+	return sid + "-" + strconv.Itoa(int(fun))
+}