mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-20 10:20:00 +02:00
39 lines
769 B
Go
39 lines
769 B
Go
package filer
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type ReaderPattern struct {
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isStreaming bool
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lastReadOffset int64
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}
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// For streaming read: only cache the first chunk
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// For random read: only fetch the requested range, instead of the whole chunk
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func NewReaderPattern() *ReaderPattern {
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return &ReaderPattern{
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isStreaming: true,
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lastReadOffset: -1,
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}
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}
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func (rp *ReaderPattern) MonitorReadAt(offset int64, size int) {
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isStreaming := true
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if rp.lastReadOffset > offset {
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isStreaming = false
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}
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if rp.lastReadOffset == -1 {
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if offset != 0 {
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isStreaming = false
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}
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}
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rp.lastReadOffset = offset
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rp.isStreaming = isStreaming
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}
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func (rp *ReaderPattern) IsStreamingMode() bool {
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return rp.isStreaming
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}
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func (rp *ReaderPattern) IsRandomMode() bool {
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return !rp.isStreaming
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}
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