seaweedfs/weed/operation/grpc_client.go

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package operation
import (
"fmt"
"strconv"
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"strings"
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"sync"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
"github.com/chrislusf/seaweedfs/weed/util"
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"google.golang.org/grpc"
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)
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var (
grpcClients = make(map[string]*grpc.ClientConn)
grpcClientsLock sync.Mutex
)
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func WithVolumeServerClient(volumeServer string, fn func(volume_server_pb.VolumeServerClient) error) error {
grpcAddress, err := toVolumeServerGrpcAddress(volumeServer)
if err != nil {
return err
}
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return util.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
client := volume_server_pb.NewVolumeServerClient(grpcConnection)
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return fn(client)
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}, grpcAddress)
}
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 {
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return util.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
client := master_pb.NewSeaweedClient(grpcConnection)
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return fn(client)
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}, masterServer)
}