110 lines
2.3 KiB
Go
110 lines
2.3 KiB
Go
package nex
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import (
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"context"
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"google.golang.org/grpc/metadata"
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"time"
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"git.solsynth.dev/hypernet/nexus/pkg/proto"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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health "google.golang.org/grpc/health/grpc_health_v1"
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_ "github.com/mbobakov/grpc-consul-resolver"
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)
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type Conn struct {
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Addr string
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Info *proto.ServiceInfo
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commandServer *grpc.Server
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commandHandlers map[string]CommandHandler
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nexusConn *grpc.ClientConn
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clientConn map[string]*grpc.ClientConn
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}
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func NewNexusConn(addr string, info *proto.ServiceInfo) (*Conn, error) {
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conn, err := grpc.NewClient(
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addr,
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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)
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if err != nil {
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return nil, err
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}
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return &Conn{
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Addr: addr,
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Info: info,
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commandHandlers: make(map[string]CommandHandler),
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nexusConn: conn,
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clientConn: make(map[string]*grpc.ClientConn),
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}, nil
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}
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func (v *Conn) RegisterService() error {
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dir := proto.NewDirectoryServiceClient(v.nexusConn)
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ctx := context.Background()
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ctx = metadata.AppendToOutgoingContext(ctx, "client_id", v.Info.Id)
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_, err := dir.AddService(ctx, v.Info)
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return err
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}
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func (v *Conn) RunRegistering() error {
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err := v.RegisterService()
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if err != nil {
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return err
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}
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for {
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time.Sleep(5 * time.Second)
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client := health.NewHealthClient(v.nexusConn)
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if _, err := client.Check(context.Background(), &health.HealthCheckRequest{}); err != nil {
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if v.RunRegistering() == nil {
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break
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}
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}
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}
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return nil
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}
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func (v *Conn) GetNexusGrpcConn() *grpc.ClientConn {
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return v.nexusConn
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}
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func (v *Conn) GetClientGrpcConn(t string) (*grpc.ClientConn, error) {
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if val, ok := v.clientConn[t]; ok {
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
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defer cancel()
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if _, err := health.NewHealthClient(val).Check(ctx, &health.HealthCheckRequest{
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Service: t,
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}); err == nil {
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return val, nil
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} else {
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delete(v.clientConn, t)
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}
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}
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
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defer cancel()
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out, err := proto.NewDirectoryServiceClient(v.nexusConn).GetService(ctx, &proto.GetServiceRequest{
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Type: &t,
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})
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if err != nil {
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return nil, err
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}
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conn, err := grpc.NewClient(
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out.GetData().GetGrpcAddr(),
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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)
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if err == nil {
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v.clientConn[t] = conn
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}
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return conn, err
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}
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