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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.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(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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