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68 lines
2.0 KiB
68 lines
2.0 KiB
package replication
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import (
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"context"
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"fmt"
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"path/filepath"
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"strings"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/replication/sink"
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"github.com/chrislusf/seaweedfs/weed/replication/source"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type Replicator struct {
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sink sink.ReplicationSink
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source *source.FilerSource
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}
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func NewReplicator(sourceConfig util.Configuration, configPrefix string, dataSink sink.ReplicationSink) *Replicator {
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source := &source.FilerSource{}
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source.Initialize(sourceConfig, configPrefix)
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dataSink.SetSourceFiler(source)
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return &Replicator{
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sink: dataSink,
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source: source,
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}
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}
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func (r *Replicator) Replicate(ctx context.Context, key string, message *filer_pb.EventNotification) error {
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if !strings.HasPrefix(key, r.source.Dir) {
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glog.V(4).Infof("skipping %v outside of %v", key, r.source.Dir)
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return nil
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}
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newKey := filepath.ToSlash(filepath.Join(r.sink.GetSinkToDirectory(), key[len(r.source.Dir):]))
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glog.V(3).Infof("replicate %s => %s", key, newKey)
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key = newKey
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if message.OldEntry != nil && message.NewEntry == nil {
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glog.V(4).Infof("deleting %v", key)
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return r.sink.DeleteEntry(ctx, key, message.OldEntry.IsDirectory, message.DeleteChunks)
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}
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if message.OldEntry == nil && message.NewEntry != nil {
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glog.V(4).Infof("creating %v", key)
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return r.sink.CreateEntry(ctx, key, message.NewEntry)
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}
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if message.OldEntry == nil && message.NewEntry == nil {
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glog.V(0).Infof("weird message %+v", message)
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return nil
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}
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foundExisting, err := r.sink.UpdateEntry(ctx, key, message.OldEntry, message.NewParentPath, message.NewEntry, message.DeleteChunks)
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if foundExisting {
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glog.V(4).Infof("updated %v", key)
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return err
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}
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err = r.sink.DeleteEntry(ctx, key, message.OldEntry.IsDirectory, false)
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if err != nil {
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return fmt.Errorf("delete old entry %v: %v", key, err)
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}
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glog.V(4).Infof("creating missing %v", key)
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return r.sink.CreateEntry(ctx, key, message.NewEntry)
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}
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