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54 lines
1.7 KiB
54 lines
1.7 KiB
package needle
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import (
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"fmt"
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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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"github.com/seaweedfs/seaweedfs/weed/util/buffer_pool"
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)
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func writeNeedleV1(w backend.BackendStorageFile, n *Needle) (offset uint64, size Size, actualSize int64, 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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// handle error
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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: %w", e)
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return
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}
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if offset >= MaxPossibleVolumeSize && len(n.Data) != 0 {
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err = fmt.Errorf("Volume Size %d Exceeded %d", offset, MaxPossibleVolumeSize)
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return
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}
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bytesBuffer := buffer_pool.SyncPoolGetBuffer()
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defer buffer_pool.SyncPoolPutBuffer(bytesBuffer)
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bytesBuffer.Reset()
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header := make([]byte, NeedleHeaderSize)
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CookieToBytes(header[0:CookieSize], n.Cookie)
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NeedleIdToBytes(header[CookieSize:CookieSize+NeedleIdSize], n.Id)
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n.Size = Size(len(n.Data))
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SizeToBytes(header[CookieSize+NeedleIdSize:CookieSize+NeedleIdSize+SizeSize], n.Size)
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size = n.Size
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actualSize = NeedleHeaderSize + int64(n.Size)
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bytesBuffer.Write(header)
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bytesBuffer.Write(n.Data)
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padding := PaddingLength(n.Size, Version1)
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util.Uint32toBytes(header[0:NeedleChecksumSize], uint32(n.Checksum))
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bytesBuffer.Write(header[0 : NeedleChecksumSize+padding])
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_, err = w.WriteAt(bytesBuffer.Bytes(), int64(offset))
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if err != nil {
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err = fmt.Errorf("failed to write %d bytes to %s at offset %d: %w", actualSize, w.Name(), offset, err)
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}
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return offset, size, actualSize, err
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}
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