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package filersink
import (
"context"
"fmt"
"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/security"
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/util/log"
"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
grpcDialOption grpc.DialOption
}
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, prefix string) error {
return fs.DoInitialize(
configuration.GetString(prefix+"grpcAddress"),
configuration.GetString(prefix+"directory"),
configuration.GetString(prefix+"replication"),
configuration.GetString(prefix+"collection"),
configuration.GetInt(prefix+"ttlSec"),
security.LoadClientTLS(util.GetViper(), "grpc.client"))
}
func (fs *FilerSink) SetSourceFiler(s *source.FilerSource) {
fs.filerSource = s
}
func (fs *FilerSink) DoInitialize(grpcAddress string, dir string,
replication string, collection string, ttlSec int, grpcDialOption grpc.DialOption) (err error) {
fs.grpcAddress = grpcAddress
fs.dir = dir
fs.replication = replication
fs.collection = collection
fs.ttlSec = int32(ttlSec)
fs.grpcDialOption = grpcDialOption
return nil
}
func (fs *FilerSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
dir, name := util.FullPath(key).DirAndName()
log.Tracef("delete entry: %v", key)
err := filer_pb.Remove(fs, dir, name, deleteIncludeChunks, true, true, true, signatures)
if err != nil {
log.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, signatures []int32) error {
return fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
dir, name := util.FullPath(key).DirAndName()
// look up existing entry
lookupRequest := &filer_pb.LookupDirectoryEntryRequest{
Directory: dir,
Name: name,
}
log.Debugf("lookup: %v", lookupRequest)
if resp, err := filer_pb.LookupEntry(client, lookupRequest); err == nil {
if filer.ETag(resp.Entry) == filer.ETag(entry) {
log.Tracef("already replicated %s", key)
return nil
}
}
replicatedChunks, err := fs.replicateChunks(entry.Chunks, key)
if err != nil {
// only warning here since the source chunk may have been deleted already
log.Warnf("replicate entry chunks %s: %v", key, err)
}
log.Tracef("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,
},
IsFromOtherCluster: true,
Signatures: signatures,
}
log.Tracef("create: %v", request)
if err := filer_pb.CreateEntry(client, request); err != nil {
log.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 *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
dir, name := util.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,
}
log.Tracef("lookup entry: %v", request)
resp, err := filer_pb.LookupEntry(client, request)
if err != nil {
log.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)
}
log.Tracef("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
log.Debugf("late updates %s", key)
} else if filer.ETag(newEntry) == filer.ETag(existingEntry) {
// skip if no change
// this usually happens when retrying the replication
log.Tracef("already replicated %s", key)
} else {
// find out what changed
deletedChunks, newChunks, err := compareChunks(filer.LookupFn(fs), oldEntry, newEntry)
if err != nil {
return true, fmt.Errorf("replicte %s compare chunks error: %v", key, err)
}
// 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 = filer.DoMinusChunks(existingEntry.Chunks, deletedChunks)
}
// replicate the chunks that are new in the source
replicatedChunks, err := fs.replicateChunks(newChunks, key)
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: newParentPath,
Entry: existingEntry,
IsFromOtherCluster: true,
Signatures: signatures,
}
if _, err := client.UpdateEntry(context.Background(), request); err != nil {
return fmt.Errorf("update existingEntry %s: %v", key, err)
}
return nil
})
}
func compareChunks(lookupFileIdFn filer.LookupFileIdFunctionType, oldEntry, newEntry *filer_pb.Entry) (deletedChunks, newChunks []*filer_pb.FileChunk, err error) {
aData, aMeta, aErr := filer.ResolveChunkManifest(lookupFileIdFn, oldEntry.Chunks)
if aErr != nil {
return nil, nil, aErr
}
bData, bMeta, bErr := filer.ResolveChunkManifest(lookupFileIdFn, newEntry.Chunks)
if bErr != nil {
return nil, nil, bErr
}
deletedChunks = append(deletedChunks, filer.DoMinusChunks(aData, bData)...)
deletedChunks = append(deletedChunks, filer.DoMinusChunks(aMeta, bMeta)...)
newChunks = append(newChunks, filer.DoMinusChunks(bData, aData)...)
newChunks = append(newChunks, filer.DoMinusChunks(bMeta, aMeta)...)
return
}
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