wp

qb.go

@@ -23,34 +23,36 @@ const (
 )
 
 type TimestampCompressor interface {
-	CalcRequiredSpace(uint32) (int, int)
-	Append(int, uint32)
-	Size() int
-	Chunks() [][]byte
-	DeleteLast()
-	Renew()
+	// (timestamp) => compressionWay, requiredSpace
+	Evaluate(uint32) (int, int)
+	Compress(int, uint32)
+	//Size() int
+	//Chunks() [][]byte
+	//DeleteLast()
 	CaptureState()
 	ForgetCapturedState()
 	CreateDecompressor() TimestampDecompressor
-	Snapshot() ([]byte, []byte) // payload, additional payload
+	Snapshot() ([]byte, []byte) // tail, head
 	Offset() int
-	Sync()
+	Rotate([]byte) int // payloadSize
 	//LastTimestamp() uint32
 }
 
 type ValueCompressor interface {
-	CalcRequiredSpace(float64) int
-	Append(float64)
-	Size() int
-	Chunks() [][]byte
-	DeleteLast()
+	// (value) => compressionWay, requiredSpace
+	Evaluate(float64) (int, int)
+	Compress(int, float64)
+	//Size() int
+	//Chunks() [][]byte
+	//DeleteLast()
 	Renew() // створює новий conbuf, але не чіпає state
-	Lock()
-	Unlock()
+	CaptureState()
+	ForgetCapturedState()
 	// fracDigits
 	CreateDecompressor(byte) ValueDecompressor
-	Snapshot() ([][]byte, int) // chunks, size
+	Snapshot() ([]byte, []byte) // tail, head
 	Offset() int
+	Rotate([]byte) int // payloadSize
 	//LastValue() float64
 }