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package filer2
import (
"context"
"fmt"
"time"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (fs *Filer) GetMaster() string {
return fs.currentMaster
}
func (fs *Filer) KeepConnectedToMaster() {
glog.V(0).Infof("Filer bootstraps with masters %v", fs.masters)
for _, master := range fs.masters {
glog.V(0).Infof("Connecting to %v", master)
withMasterClient(master, func(client master_pb.SeaweedClient) error {
stream, err := client.KeepConnected(context.Background())
if err != nil {
glog.V(0).Infof("failed to keep connected to %s: %v", master, err)
return err
}
glog.V(0).Infof("Connected to %v", master)
fs.currentMaster = master
for {
time.Sleep(time.Duration(float32(10*1e3)*0.25) * time.Millisecond)
if err = stream.Send(&master_pb.Empty{}); err != nil {
glog.V(0).Infof("failed to send to %s: %v", master, err)
return err
}
if _, err = stream.Recv(); err != nil {
glog.V(0).Infof("failed to receive from %s: %v", master, err)
return err
}
}
})
fs.currentMaster = ""
}
}
func withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error {
grpcConnection, err := util.GrpcDial(master)
if err != nil {
return fmt.Errorf("fail to dial %s: %v", master, err)
}
defer grpcConnection.Close()
client := master_pb.NewSeaweedClient(grpcConnection)
return fn(client)
}
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