forked from vitessio/vitess
/
client.go
88 lines (73 loc) · 2.68 KB
/
client.go
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// Copyright 2015, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package grpcvtworkerclient contains the gRPC version of the vtworker client protocol.
package grpcvtworkerclient
import (
"flag"
"time"
"golang.org/x/net/context"
"google.golang.org/grpc"
"github.com/youtube/vitess/go/vt/logutil"
"github.com/youtube/vitess/go/vt/servenv/grpcutils"
"github.com/youtube/vitess/go/vt/vterrors"
"github.com/youtube/vitess/go/vt/worker/vtworkerclient"
logutilpb "github.com/youtube/vitess/go/vt/proto/logutil"
vtrpcpb "github.com/youtube/vitess/go/vt/proto/vtrpc"
vtworkerdatapb "github.com/youtube/vitess/go/vt/proto/vtworkerdata"
vtworkerservicepb "github.com/youtube/vitess/go/vt/proto/vtworkerservice"
)
var (
cert = flag.String("vtworker_client_grpc_cert", "", "the cert to use to connect")
key = flag.String("vtworker_client_grpc_key", "", "the key to use to connect")
ca = flag.String("vtworker_client_grpc_ca", "", "the server ca to use to validate servers when connecting")
name = flag.String("vtworker_client_grpc_server_name", "", "the server name to use to validate server certificate")
)
type gRPCVtworkerClient struct {
cc *grpc.ClientConn
c vtworkerservicepb.VtworkerClient
}
func gRPCVtworkerClientFactory(addr string, dialTimeout time.Duration) (vtworkerclient.Client, error) {
// create the RPC client
opt, err := grpcutils.ClientSecureDialOption(*cert, *key, *ca, *name)
if err != nil {
return nil, err
}
cc, err := grpc.Dial(addr, opt, grpc.WithBlock(), grpc.WithTimeout(dialTimeout))
if err != nil {
return nil, vterrors.Errorf(vtrpcpb.Code_DEADLINE_EXCEEDED, "grpc.Dial() err: %v", err)
}
c := vtworkerservicepb.NewVtworkerClient(cc)
return &gRPCVtworkerClient{
cc: cc,
c: c,
}, nil
}
type eventStreamAdapter struct {
stream vtworkerservicepb.Vtworker_ExecuteVtworkerCommandClient
}
func (e *eventStreamAdapter) Recv() (*logutilpb.Event, error) {
le, err := e.stream.Recv()
if err != nil {
return nil, vterrors.FromGRPC(err)
}
return le.Event, nil
}
// ExecuteVtworkerCommand is part of the VtworkerClient interface.
func (client *gRPCVtworkerClient) ExecuteVtworkerCommand(ctx context.Context, args []string) (logutil.EventStream, error) {
query := &vtworkerdatapb.ExecuteVtworkerCommandRequest{
Args: args,
}
stream, err := client.c.ExecuteVtworkerCommand(ctx, query)
if err != nil {
return nil, vterrors.FromGRPC(err)
}
return &eventStreamAdapter{stream}, nil
}
// Close is part of the VtworkerClient interface.
func (client *gRPCVtworkerClient) Close() {
client.cc.Close()
}
func init() {
vtworkerclient.RegisterFactory("grpc", gRPCVtworkerClientFactory)
}