wp

qb.go

@@ -2,6 +2,7 @@ package qb
 
 import (
 	"fmt"
+	"io"
 	"os"
 )
 
@@ -23,37 +24,41 @@ const (
 )
 
 type TimestampCompressor interface {
+	RestoreState(int, uint32) // (payload size, last timestamp)
 	// (timestamp) => compressionWay, requiredSpace
 	Evaluate(uint32) (int, int)
 	Compress(int, uint32)
-	//Size() int
+	Size() int
 	//Chunks() [][]byte
 	//DeleteLast()
 	CaptureState()
 	ForgetCapturedState()
 	CreateDecompressor() TimestampDecompressor
-	Snapshot() ([]byte, []byte) // tail, head
+	//Payload() []byte // для снапшота
 	Offset() int
-	Rotate([]byte) int // payloadSize
-	//LastTimestamp() uint32
+	Rotate([]byte)
+	WritePayloadTo(io.Writer) error
+	LastTimestamp() uint32
+	ReplaceSinceWithUntil() uint32
 }
 
 type ValueCompressor interface {
+	RestoreState(int) // payload size
 	// (value) => compressionWay, requiredSpace
 	Evaluate(float64) (int, int)
 	Compress(int, float64)
-	//Size() int
+	Size() int
 	//Chunks() [][]byte
 	//DeleteLast()
-	Renew() // створює новий conbuf, але не чіпає state
 	CaptureState()
 	ForgetCapturedState()
 	// fracDigits
-	CreateDecompressor(byte) ValueDecompressor
-	Snapshot() ([]byte, []byte) // tail, head
+	CreateDecompressor() ValueDecompressor
+	//Payload() []byte // для снапшота
 	Offset() int
-	Rotate([]byte) int // payloadSize
-	//LastValue() float64
+	Rotate([]byte)
+	WritePayloadTo(io.Writer) error
+	LastValue() float64
 }
 
 type TimestampDecompressor interface {
@@ -90,6 +95,8 @@ const (
 	UnknownMetricWaitQueueItemBug AbortCode = 21
 	RepeatableLock                AbortCode = 22
 	NoSpaceOnIndexPage            AbortCode = 23
+
+	WriteSnapshotFailed AbortCode = 24
 	//
 	GetRecoveryRecipeFailed      AbortCode = 26
 	LoadSnapshotFailed           AbortCode = 27
@@ -101,6 +108,8 @@ const (
 	ReplayREDOFileFailed         AbortCode = 33
 	DeletePrevChangesFileFailed  AbortCode = 34
 	DeletePrevSnapshotFileFailed AbortCode = 35
+
+	MetricNotFoundDuringReplay AbortCode = 36
 )
 
 func Abort(code AbortCode, err error) {