seaweedfs/weed/replication/repl_util/replication_util.go

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package repl_util
import (
"github.com/chrislusf/seaweedfs/weed/filer"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/util"
)
func CopyFromChunkViews(chunkViews []*filer.ChunkView, filerSource *source.FilerSource, writeFunc func(data []byte) error) error {
for _, chunk := range chunkViews {
fileUrls, err := filerSource.LookupFileId(chunk.FileId)
if err != nil {
return err
}
var writeErr error
var shouldRetry bool
for _, fileUrl := range fileUrls {
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shouldRetry, err = util.ReadUrlAsStream(fileUrl, nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
writeErr = writeFunc(data)
})
if err != nil {
glog.V(1).Infof("read from %s: %v", fileUrl, err)
} else if writeErr != nil {
glog.V(1).Infof("copy from %s: %v", fileUrl, writeErr)
} else {
break
}
}
if shouldRetry && err != nil {
return err
}
if writeErr != nil {
return writeErr
}
}
return nil
}