refactoring

weed/util/log_buffer/log_buffer.go

@@ -55,35 +55,36 @@ type CachedDiskChunk struct {
 }
 
 type LogBuffer struct {
-	LastFlushTsNs     int64
-	name              string
-	prevBuffers       *SealedBuffers
-	buf               []byte
-	offset            int64 // Last offset in current buffer (endOffset)
-	bufferStartOffset int64 // First offset in current buffer
-	idx               []int
-	pos               int
+	// 8-byte aligned fields
+	LastTsNs          atomic.Int64
+	lastFlushTsNs     atomic.Int64
+	lastFlushedOffset atomic.Int64 // Highest offset that has been flushed to disk (-1 = nothing flushed yet)
+	offset            int64
+	bufferStartOffset int64
+	minOffset         int64
+	maxOffset         int64
+	flushInterval     time.Duration
 	startTime         time.Time
 	stopTime          time.Time
-	lastFlushDataTime time.Time
-	sizeBuf           []byte
-	flushInterval     time.Duration
-	flushFn           LogFlushFuncType
-	ReadFromDiskFn    LogReadFromDiskFuncType
-	notifyFn          func()
+
+	// Other fields
+	name           string
+	prevBuffers    *SealedBuffers
+	buf            []byte
+	idx            []int
+	pos            int
+	sizeBuf        []byte
+	flushFn        LogFlushFuncType
+	ReadFromDiskFn LogReadFromDiskFuncType
+	notifyFn       func()
 	// Per-subscriber notification channels for instant wake-up
 	subscribersMu sync.RWMutex
 	subscribers   map[string]chan struct{} // subscriberID -> notification channel
 	isStopping    *atomic.Bool
 	isAllFlushed  bool
 	flushChan     chan *dataToFlush
-	LastTsNs      atomic.Int64
 	// Offset range tracking for Kafka integration
-	minOffset         int64
-	maxOffset         int64
-	hasOffsets        bool
-	lastFlushedOffset atomic.Int64 // Highest offset that has been flushed to disk (-1 = nothing flushed yet)
-	lastFlushTsNs     atomic.Int64 // Latest timestamp that has been flushed to disk (0 = nothing flushed yet)
+	hasOffsets bool
 	// Disk chunk cache for historical data reads
 	diskChunkCache *DiskChunkCache
 	sync.RWMutex
@@ -235,7 +236,7 @@ func (logBuffer *LogBuffer) InitializeOffsetFromExistingData(getHighestOffsetFn
 		logBuffer.bufferStartOffset = nextOffset
 		// CRITICAL: Track that data [0...highestOffset] is on disk
 		logBuffer.lastFlushedOffset.Store(highestOffset)
-		// Set lastFlushedTime to current time (we know data up to highestOffset is on disk)
+		// Set lastFlushTsNs to current time (we know data up to highestOffset is on disk)
 		logBuffer.lastFlushTsNs.Store(time.Now().UnixNano())
 	} else {
 		logBuffer.bufferStartOffset = 0 // Start from offset 0
@@ -507,10 +508,6 @@ func (logBuffer *LogBuffer) loopFlush() {
 			logBuffer.flushFn(logBuffer, d.startTime, d.stopTime, d.data.Bytes(), d.minOffset, d.maxOffset)
 			d.releaseMemory()
 			// local logbuffer is different from aggregate logbuffer here
-			logBuffer.lastFlushDataTime = d.stopTime
-
-			// CRITICAL: Track what's been flushed to disk for both offset-based and time-based reads
-			// Use >= 0 to include offset 0 (first message in a topic)
 			if d.maxOffset >= 0 {
 				logBuffer.lastFlushedOffset.Store(d.maxOffset)
 			}
@@ -567,8 +564,6 @@ func (logBuffer *LogBuffer) copyToFlushInternal(withCallback bool) *dataToFlush
 			if withCallback {
 				d.done = make(chan struct{})
 			}
-		} else {
-			logBuffer.lastFlushDataTime = logBuffer.stopTime
 		}
 		// CRITICAL: logBuffer.offset is the "next offset to assign", so last offset in buffer is offset-1
 		lastOffsetInBuffer := logBuffer.offset - 1
@@ -624,6 +619,10 @@ func (logBuffer *LogBuffer) GetLastFlushTsNs() int64 {
 	return logBuffer.lastFlushTsNs.Load()
 }
 
+func (logBuffer *LogBuffer) SetLastFlushTsNs(ts int64) {
+	logBuffer.lastFlushTsNs.Store(ts)
+}
+
 func (d *dataToFlush) releaseMemory() {
 	d.data.Reset()
 	bufferPool.Put(d.data)