func (client *Client) dialPool(tablet *topodatapb.Tablet) (tabletmanagerservicepb.TabletManagerClient, error) {
addr := netutil.JoinHostPort(tablet.Hostname, int32(tablet.PortMap["grpc"]))
opt, err := grpcutils.ClientSecureDialOption(*cert, *key, *ca, *name)
if err != nil {
return nil, err
}
client.mu.Lock()
if client.rpcClientMap == nil {
client.rpcClientMap = make(map[string]chan *tmc)
}
c, ok := client.rpcClientMap[addr]
if !ok {
c = make(chan *tmc, *concurrency)
client.rpcClientMap[addr] = c
client.mu.Unlock()
for i := 0; i < cap(c); i++ {
cc, err := grpc.Dial(addr, opt)
if err != nil {
return nil, err
}
c <- &tmc{
cc: cc,
client: tabletmanagerservicepb.NewTabletManagerClient(cc),
}
}
} else {
client.mu.Unlock()
}
result := <-c
c <- result
return result.client, nil
}
// dial returns a client to use
func (client *Client) dial(tablet *topodatapb.Tablet) (*grpc.ClientConn, tabletmanagerservicepb.TabletManagerClient, error) {
addr := netutil.JoinHostPort(tablet.Hostname, int32(tablet.PortMap["grpc"]))
opt, err := grpcutils.ClientSecureDialOption(*cert, *key, *ca, *name)
if err != nil {
return nil, nil, err
}
cc, err := grpc.Dial(addr, opt)
if err != nil {
return nil, nil, err
}
return cc, tabletmanagerservicepb.NewTabletManagerClient(cc), nil
}
// dial returns a client to use
func (client *Client) dial(ctx context.Context, tablet *topo.TabletInfo) (*grpc.ClientConn, pbs.TabletManagerClient, error) {
// create the RPC client, using ctx.Deadline if set, or no timeout.
var connectTimeout time.Duration
deadline, ok := ctx.Deadline()
if ok {
connectTimeout = deadline.Sub(time.Now())
if connectTimeout < 0 {
return nil, nil, timeoutError{fmt.Errorf("timeout connecting to TabletManager on %v", tablet.Alias)}
}
}
var cc *grpc.ClientConn
var err error
addr := netutil.JoinHostPort(tablet.Hostname, tablet.Portmap["grpc"])
if connectTimeout == 0 {
cc, err = grpc.Dial(addr, grpc.WithBlock())
} else {
cc, err = grpc.Dial(addr, grpc.WithBlock(), grpc.WithTimeout(connectTimeout))
}
if err != nil {
return nil, nil, err
}
return cc, pbs.NewTabletManagerClient(cc), nil
}