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package replication
import ( "path/filepath" "strings"
"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, dataSink sink.ReplicationSink) *Replicator {
source := &source.FilerSource{} source.Initialize(sourceConfig)
dataSink.SetSourceFiler(source)
return &Replicator{ sink: dataSink, source: source, } }
func (r *Replicator) Replicate(key string, message *filer_pb.EventNotification) error { if !strings.HasPrefix(key, r.source.Dir) { glog.V(4).Infof("skipping %v outside of %v", key, r.source.Dir) return nil } newKey := filepath.Join(r.sink.GetSinkToDirectory(), 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) } if message.OldEntry == nil && message.NewEntry != nil { glog.V(4).Infof("creating %v", key) return r.sink.CreateEntry(key, message.NewEntry) } 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.NewEntry, message.DeleteChunks) if foundExisting { glog.V(4).Infof("updated %v", key) return err }
glog.V(4).Infof("creating missing %v", key) return r.sink.CreateEntry(key, message.NewEntry) }
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