package replication import ( "context" "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(ctx context.Context, 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.ToSlash(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(ctx, key, message.OldEntry.IsDirectory, message.DeleteChunks) } if message.OldEntry == nil && message.NewEntry != nil { glog.V(4).Infof("creating %v", key) return r.sink.CreateEntry(ctx, 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(ctx, 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(ctx, key, message.NewEntry) }