seaweedfs/weed/replication/replicator.go
2021-09-12 22:47:52 -07:00

98 lines
3 KiB
Go

package replication
import (
"context"
"fmt"
"github.com/chrislusf/seaweedfs/weed/pb"
"google.golang.org/grpc"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/replication/sink"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/util"
)
type Replicator struct {
sink sink.ReplicationSink
source *source.FilerSource
}
func NewReplicator(sourceConfig util.Configuration, configPrefix string, dataSink sink.ReplicationSink) *Replicator {
source := &source.FilerSource{}
source.Initialize(sourceConfig, configPrefix)
dataSink.SetSourceFiler(source)
return &Replicator{
sink: dataSink,
source: source,
}
}
func (r *Replicator) Replicate(ctx context.Context, key string, message *filer_pb.EventNotification) error {
if message.IsFromOtherCluster && r.sink.GetName() == "filer" {
return nil
}
if !strings.HasPrefix(key, r.source.Dir) {
glog.V(4).Infof("skipping %v outside of %v", key, r.source.Dir)
return nil
}
var dateKey string
if r.sink.IsIncremental() {
var mTime int64
if message.NewEntry != nil {
mTime = message.NewEntry.Attributes.Mtime
} else if message.OldEntry != nil {
mTime = message.OldEntry.Attributes.Mtime
}
dateKey = time.Unix(mTime, 0).Format("2006-01-02")
}
newKey := util.Join(r.sink.GetSinkToDirectory(), dateKey, key[len(r.source.Dir):])
glog.V(3).Infof("replicate %s => %s", key, newKey)
key = newKey
if message.OldEntry != nil && message.NewEntry == nil {
glog.V(4).Infof("deleting %v", key)
return r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
}
if message.OldEntry == nil && message.NewEntry != nil {
glog.V(4).Infof("creating %v", key)
return r.sink.CreateEntry(key, message.NewEntry, message.Signatures)
}
if message.OldEntry == nil && message.NewEntry == nil {
glog.V(0).Infof("weird message %+v", message)
return nil
}
foundExisting, err := r.sink.UpdateEntry(key, message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks, message.Signatures)
if foundExisting {
glog.V(4).Infof("updated %v", key)
return err
}
err = r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, false, message.Signatures)
if err != nil {
return fmt.Errorf("delete old entry %v: %v", key, err)
}
glog.V(4).Infof("creating missing %v", key)
return r.sink.CreateEntry(key, message.NewEntry, message.Signatures)
}
func ReadFilerSignature(grpcDialOption grpc.DialOption, filer pb.ServerAddress) (filerSignature int32, readErr error) {
if readErr = pb.WithFilerClient(filer, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
if resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{}); err != nil {
return fmt.Errorf("GetFilerConfiguration %s: %v", filer, err)
} else {
filerSignature = resp.Signature
}
return nil
}); readErr != nil {
return 0, readErr
}
return filerSignature, nil
}