package filersink import ( "context" "fmt" "github.com/chrislusf/seaweedfs/weed/filer2" "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 FilerSink struct { filerSource *source.FilerSource grpcAddress string dir string replication string collection string ttlSec int32 dataCenter string } func init() { sink.Sinks = append(sink.Sinks, &FilerSink{}) } func (fs *FilerSink) GetName() string { return "filer" } func (fs *FilerSink) GetSinkToDirectory() string { return fs.dir } func (fs *FilerSink) Initialize(configuration util.Configuration) error { return fs.initialize( configuration.GetString("grpcAddress"), configuration.GetString("directory"), configuration.GetString("replication"), configuration.GetString("collection"), configuration.GetInt("ttlSec"), ) } func (fs *FilerSink) SetSourceFiler(s *source.FilerSource) { fs.filerSource = s } func (fs *FilerSink) initialize(grpcAddress string, dir string, replication string, collection string, ttlSec int) (err error) { fs.grpcAddress = grpcAddress fs.dir = dir fs.replication = replication fs.collection = collection fs.ttlSec = int32(ttlSec) return nil } func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error { return fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { dir, name := filer2.FullPath(key).DirAndName() request := &filer_pb.DeleteEntryRequest{ Directory: dir, Name: name, IsDirectory: isDirectory, IsDeleteData: deleteIncludeChunks, } glog.V(1).Infof("delete entry: %v", request) _, err := client.DeleteEntry(context.Background(), request) if err != nil { glog.V(0).Infof("delete entry %s: %v", key, err) return fmt.Errorf("delete entry %s: %v", key, err) } return nil }) } func (fs *FilerSink) CreateEntry(key string, entry *filer_pb.Entry) error { return fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { dir, name := filer2.FullPath(key).DirAndName() ctx := context.Background() // look up existing entry lookupRequest := &filer_pb.LookupDirectoryEntryRequest{ Directory: dir, Name: name, } glog.V(1).Infof("lookup: %v", lookupRequest) if resp, err := client.LookupDirectoryEntry(ctx, lookupRequest); err == nil { if filer2.ETag(resp.Entry.Chunks) == filer2.ETag(entry.Chunks) { glog.V(0).Infof("already replicated %s", key) return nil } } replicatedChunks, err := fs.replicateChunks(entry.Chunks) if err != nil { glog.V(0).Infof("replicate entry chunks %s: %v", key, err) return fmt.Errorf("replicate entry chunks %s: %v", key, err) } glog.V(0).Infof("replicated %s %+v ===> %+v", key, entry.Chunks, replicatedChunks) request := &filer_pb.CreateEntryRequest{ Directory: dir, Entry: &filer_pb.Entry{ Name: name, IsDirectory: entry.IsDirectory, Attributes: entry.Attributes, Chunks: replicatedChunks, }, } glog.V(1).Infof("create: %v", request) if _, err := client.CreateEntry(ctx, request); err != nil { glog.V(0).Infof("create entry %s: %v", key, err) return fmt.Errorf("create entry %s: %v", key, err) } return nil }) } func (fs *FilerSink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) { ctx := context.Background() dir, name := filer2.FullPath(key).DirAndName() // read existing entry var existingEntry *filer_pb.Entry err = fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.LookupDirectoryEntryRequest{ Directory: dir, Name: name, } glog.V(4).Infof("lookup entry: %v", request) resp, err := client.LookupDirectoryEntry(ctx, request) if err != nil { glog.V(0).Infof("lookup %s: %v", key, err) return err } existingEntry = resp.Entry return nil }) if err != nil { return false, fmt.Errorf("lookup %s: %v", key, err) } glog.V(0).Infof("oldEntry %+v, newEntry %+v, existingEntry: %+v", oldEntry, newEntry, existingEntry) if existingEntry.Attributes.Mtime > newEntry.Attributes.Mtime { // skip if already changed // this usually happens when the messages are not ordered glog.V(0).Infof("late updates %s", key) } else if filer2.ETag(newEntry.Chunks) == filer2.ETag(existingEntry.Chunks) { // skip if no change // this usually happens when retrying the replication glog.V(0).Infof("already replicated %s", key) } else { // find out what changed deletedChunks, newChunks := compareChunks(oldEntry, newEntry) // delete the chunks that are deleted from the source if deleteIncludeChunks { // remove the deleted chunks. Actual data deletion happens in filer UpdateEntry FindUnusedFileChunks existingEntry.Chunks = minusChunks(existingEntry.Chunks, deletedChunks) } // replicate the chunks that are new in the source replicatedChunks, err := fs.replicateChunks(newChunks) if err != nil { return true, fmt.Errorf("replicte %s chunks error: %v", key, err) } existingEntry.Chunks = append(existingEntry.Chunks, replicatedChunks...) } // save updated meta data return true, fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error { request := &filer_pb.UpdateEntryRequest{ Directory: dir, Entry: existingEntry, } if _, err := client.UpdateEntry(ctx, request); err != nil { return fmt.Errorf("update existingEntry %s: %v", key, err) } return nil }) } func compareChunks(oldEntry, newEntry *filer_pb.Entry) (deletedChunks, newChunks []*filer_pb.FileChunk) { deletedChunks = minusChunks(oldEntry.Chunks, newEntry.Chunks) newChunks = minusChunks(newEntry.Chunks, oldEntry.Chunks) return } func minusChunks(as, bs []*filer_pb.FileChunk) (delta []*filer_pb.FileChunk) { for _, a := range as { found := false for _, b := range bs { if a.FileId == b.FileId { found = true break } } if !found { delta = append(delta, a) } } return }