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package operation
import (
"fmt"
"strconv"
"strings"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/util"
"sync"
"google.golang.org/grpc"
)
var (
grpcClients = make(map[string]*grpc.ClientConn)
grpcClientsLock sync.Mutex
)
func WithVolumeServerClient(volumeServer string, fn func(volume_server_pb.VolumeServerClient) error) error {
grpcAddress, err := toVolumeServerGrpcAddress(volumeServer)
if err != nil {
return err
}
grpcClientsLock.Lock()
existingConnection, found := grpcClients[grpcAddress]
if found {
grpcClientsLock.Unlock()
client := volume_server_pb.NewVolumeServerClient(existingConnection)
return fn(client)
}
grpcConnection, err := util.GrpcDial(grpcAddress)
if err != nil {
grpcClientsLock.Unlock()
return fmt.Errorf("fail to dial %s: %v", grpcAddress, err)
}
grpcClients[grpcAddress] = grpcConnection
grpcClientsLock.Unlock()
client := volume_server_pb.NewVolumeServerClient(grpcConnection)
return fn(client)
}
func toVolumeServerGrpcAddress(volumeServer string) (grpcAddress string, err error) {
sepIndex := strings.LastIndex(volumeServer, ":")
port, err := strconv.Atoi(volumeServer[sepIndex+1:])
if err != nil {
glog.Errorf("failed to parse volume server address: %v", volumeServer)
return "", err
}
return fmt.Sprintf("%s:%d", volumeServer[0:sepIndex], port+10000), nil
}
func withMasterServerClient(masterServer string, fn func(masterClient master_pb.SeaweedClient) error) error {
grpcClientsLock.Lock()
existingConnection, found := grpcClients[masterServer]
if found {
grpcClientsLock.Unlock()
client := master_pb.NewSeaweedClient(existingConnection)
return fn(client)
}
grpcConnection, err := util.GrpcDial(masterServer)
if err != nil {
grpcClientsLock.Unlock()
return fmt.Errorf("fail to dial %s: %v", masterServer, err)
}
grpcClients[masterServer] = grpcConnection
grpcClientsLock.Unlock()
client := master_pb.NewSeaweedClient(grpcConnection)
return fn(client)
}
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