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62 lines
1.3 KiB
62 lines
1.3 KiB
package log_buffer
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import (
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"fmt"
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"time"
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)
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type MemBuffer struct {
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buf []byte
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size int
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startTime time.Time
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stopTime time.Time
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}
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type SealedBuffers struct {
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buffers []*MemBuffer
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}
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func newSealedBuffers(size int) *SealedBuffers {
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sbs := &SealedBuffers{}
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sbs.buffers = make([]*MemBuffer, size)
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for i := 0; i < size; i++ {
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sbs.buffers[i] = &MemBuffer{
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buf: make([]byte, BufferSize),
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}
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}
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return sbs
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}
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func (sbs *SealedBuffers) SealBuffer(startTime, stopTime time.Time, buf []byte, pos int) (newBuf []byte) {
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oldMemBuffer := sbs.buffers[0]
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size := len(sbs.buffers)
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for i := 0; i < size-1; i++ {
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sbs.buffers[i].buf = sbs.buffers[i+1].buf
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sbs.buffers[i].size = sbs.buffers[i+1].size
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sbs.buffers[i].startTime = sbs.buffers[i+1].startTime
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sbs.buffers[i].stopTime = sbs.buffers[i+1].stopTime
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}
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sbs.buffers[size-1].buf = buf
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sbs.buffers[size-1].size = pos
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sbs.buffers[size-1].startTime = startTime
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sbs.buffers[size-1].stopTime = stopTime
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return oldMemBuffer.buf
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}
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func (mb *MemBuffer) locateByTs(lastReadTime time.Time) (pos int) {
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lastReadTs := lastReadTime.UnixNano()
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for pos < len(mb.buf) {
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size, t := readTs(mb.buf, pos)
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if t > lastReadTs {
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return
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}
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pos += size + 4
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}
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return len(mb.buf)
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}
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func (mb *MemBuffer) String() string {
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return fmt.Sprintf("[%v,%v] bytes:%d", mb.startTime, mb.stopTime, mb.size)
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}
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