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54 lines
1.3 KiB
54 lines
1.3 KiB
package needle
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/storage/backend"
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. "github.com/seaweedfs/seaweedfs/weed/storage/types"
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"github.com/seaweedfs/seaweedfs/weed/util"
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)
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func (n *Needle) Append(w backend.BackendStorageFile, version Version) (offset uint64, size Size, actualSize int64, err error) {
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switch version {
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case Version1:
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return writeNeedleV1(w, n)
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case Version2:
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return writeNeedleV2(w, n)
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case Version3:
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return writeNeedleV3(w, n)
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default:
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err = fmt.Errorf("unsupported version: %d", version)
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return
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}
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}
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func WriteNeedleBlob(w backend.BackendStorageFile, dataSlice []byte, size Size, appendAtNs uint64, version Version) (offset uint64, err error) {
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if end, _, e := w.GetStat(); e == nil {
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defer func(w backend.BackendStorageFile, off int64) {
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if err != nil {
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if te := w.Truncate(end); te != nil {
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glog.V(0).Infof("Failed to truncate %s back to %d with error: %v", w.Name(), end, te)
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}
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}
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}(w, end)
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offset = uint64(end)
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} else {
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err = fmt.Errorf("Cannot Read Current Volume Position: %v", e)
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return
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}
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if version == Version3 {
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tsOffset := NeedleHeaderSize + size + NeedleChecksumSize
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util.Uint64toBytes(dataSlice[tsOffset:tsOffset+TimestampSize], appendAtNs)
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}
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if err == nil {
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_, err = w.WriteAt(dataSlice, int64(offset))
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}
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return
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}
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