seaweedfs/weed/replication/sink/filersink/fetch_write.go

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package filersink
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import (
"context"
"fmt"
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"github.com/chrislusf/seaweedfs/weed/util"
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"sync"
"google.golang.org/grpc"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/security"
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)
func (fs *FilerSink) replicateChunks(sourceChunks []*filer_pb.FileChunk, path string) (replicatedChunks []*filer_pb.FileChunk, err error) {
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if len(sourceChunks) == 0 {
return
}
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replicatedChunks = make([]*filer_pb.FileChunk, len(sourceChunks))
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var wg sync.WaitGroup
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for chunkIndex, sourceChunk := range sourceChunks {
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wg.Add(1)
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go func(chunk *filer_pb.FileChunk, index int) {
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defer wg.Done()
replicatedChunk, e := fs.replicateOneChunk(chunk, path)
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if e != nil {
err = e
}
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replicatedChunks[index] = replicatedChunk
}(sourceChunk, chunkIndex)
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}
wg.Wait()
return
}
func (fs *FilerSink) replicateOneChunk(sourceChunk *filer_pb.FileChunk, path string) (*filer_pb.FileChunk, error) {
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fileId, err := fs.fetchAndWrite(sourceChunk, path)
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if err != nil {
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return nil, fmt.Errorf("copy %s: %v", sourceChunk.GetFileIdString(), err)
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}
return &filer_pb.FileChunk{
FileId: fileId,
Offset: sourceChunk.Offset,
Size: sourceChunk.Size,
Mtime: sourceChunk.Mtime,
ETag: sourceChunk.ETag,
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SourceFileId: sourceChunk.GetFileIdString(),
CipherKey: sourceChunk.CipherKey,
IsCompressed: sourceChunk.IsCompressed,
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}, nil
}
func (fs *FilerSink) fetchAndWrite(sourceChunk *filer_pb.FileChunk, path string) (fileId string, err error) {
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filename, header, resp, err := fs.filerSource.ReadPart(sourceChunk.GetFileIdString())
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if err != nil {
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return "", fmt.Errorf("read part %s: %v", sourceChunk.GetFileIdString(), err)
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}
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defer util.CloseResponse(resp)
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var host string
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var auth security.EncodedJwt
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if err := fs.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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request := &filer_pb.AssignVolumeRequest{
Count: 1,
Replication: fs.replication,
Collection: fs.collection,
TtlSec: fs.ttlSec,
DataCenter: fs.dataCenter,
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DiskType: fs.diskType,
Path: path,
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}
resp, err := client.AssignVolume(context.Background(), request)
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if err != nil {
glog.V(0).Infof("assign volume failure %v: %v", request, err)
return err
}
if resp.Error != "" {
return fmt.Errorf("assign volume failure %v: %v", request, resp.Error)
}
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fileId, host, auth = resp.FileId, resp.Url, security.EncodedJwt(resp.Auth)
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return nil
}); err != nil {
return "", fmt.Errorf("filerGrpcAddress assign volume: %v", err)
}
fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
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glog.V(4).Infof("replicating %s to %s header:%+v", filename, fileUrl, header)
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// fetch data as is, regardless whether it is encrypted or not
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uploadResult, err, _ := operation.Upload(fileUrl, filename, false, resp.Body, "gzip" == header.Get("Content-Encoding"), header.Get("Content-Type"), nil, auth)
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if err != nil {
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glog.V(0).Infof("upload source data %v to %s: %v", sourceChunk.GetFileIdString(), fileUrl, err)
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return "", fmt.Errorf("upload data: %v", err)
}
if uploadResult.Error != "" {
glog.V(0).Infof("upload failure %v to %s: %v", filename, fileUrl, err)
return "", fmt.Errorf("upload result: %v", uploadResult.Error)
}
return
}
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var _ = filer_pb.FilerClient(&FilerSink{})
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func (fs *FilerSink) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
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return pb.WithCachedGrpcClient(func(grpcConnection *grpc.ClientConn) error {
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client := filer_pb.NewSeaweedFilerClient(grpcConnection)
return fn(client)
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}, fs.grpcAddress, fs.grpcDialOption)
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}
func (fs *FilerSink) AdjustedUrl(location *filer_pb.Location) string {
return location.Url
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}