mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-23 20:37:12 +01:00
d5dddb0953
This will simplify examining the returned errors such as httpserver.ErrorWithStatusCode . See https://blog.golang.org/go1.13-errors for details.
117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
package storage
|
|
|
|
import (
|
|
"fmt"
|
|
"path/filepath"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
// partHeader represents part header.
|
|
type partHeader struct {
|
|
// RowsCount is the total number of rows in the part.
|
|
RowsCount uint64
|
|
|
|
// BlocksCount is the total number of blocks in the part.
|
|
BlocksCount uint64
|
|
|
|
// MinTimestamp is the minimum timestamp in the part.
|
|
MinTimestamp int64
|
|
|
|
// MaxTimestamp is the maximum timestamp in the part.
|
|
MaxTimestamp int64
|
|
}
|
|
|
|
// String returns string representation of ph.
|
|
func (ph *partHeader) String() string {
|
|
return fmt.Sprintf("%d_%d_%s_%s", ph.RowsCount, ph.BlocksCount, toUserReadableTimestamp(ph.MinTimestamp), toUserReadableTimestamp(ph.MaxTimestamp))
|
|
}
|
|
|
|
func toUserReadableTimestamp(timestamp int64) string {
|
|
t := timestampToTime(timestamp)
|
|
return t.Format(userReadableTimeFormat)
|
|
}
|
|
|
|
func fromUserReadableTimestamp(s string) (int64, error) {
|
|
t, err := time.Parse(userReadableTimeFormat, s)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return timestampFromTime(t), nil
|
|
}
|
|
|
|
const userReadableTimeFormat = "20060102150405.000"
|
|
|
|
// Path returns a path to part header with the given prefix and suffix.
|
|
//
|
|
// Suffix must be random.
|
|
func (ph *partHeader) Path(prefix string, suffix uint64) string {
|
|
prefix = filepath.Clean(prefix)
|
|
s := ph.String()
|
|
return fmt.Sprintf("%s/%s_%016X", prefix, s, suffix)
|
|
}
|
|
|
|
// ParseFromPath extracts ph info from the given path.
|
|
func (ph *partHeader) ParseFromPath(path string) error {
|
|
ph.Reset()
|
|
|
|
path = filepath.Clean(path)
|
|
|
|
// Extract encoded part name.
|
|
n := strings.LastIndexByte(path, '/')
|
|
if n < 0 {
|
|
return fmt.Errorf("cannot find encoded part name in the path %q", path)
|
|
}
|
|
partName := path[n+1:]
|
|
|
|
// PartName must have the following form:
|
|
// RowsCount_BlocksCount_MinTimestamp_MaxTimestamp_Garbage
|
|
a := strings.Split(partName, "_")
|
|
if len(a) != 5 {
|
|
return fmt.Errorf("unexpected number of substrings in the part name %q: got %d; want %d", partName, len(a), 5)
|
|
}
|
|
|
|
var err error
|
|
|
|
ph.RowsCount, err = strconv.ParseUint(a[0], 10, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse rowsCount from partName %q: %w", partName, err)
|
|
}
|
|
ph.BlocksCount, err = strconv.ParseUint(a[1], 10, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse blocksCount from partName %q: %w", partName, err)
|
|
}
|
|
ph.MinTimestamp, err = fromUserReadableTimestamp(a[2])
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse minTimestamp from partName %q: %w", partName, err)
|
|
}
|
|
ph.MaxTimestamp, err = fromUserReadableTimestamp(a[3])
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse maxTimestamp from partName %q: %w", partName, err)
|
|
}
|
|
|
|
if ph.MinTimestamp > ph.MaxTimestamp {
|
|
return fmt.Errorf("minTimestamp cannot exceed maxTimestamp; got %d vs %d", ph.MinTimestamp, ph.MaxTimestamp)
|
|
}
|
|
if ph.RowsCount <= 0 {
|
|
return fmt.Errorf("rowsCount must be greater than 0; got %d", ph.RowsCount)
|
|
}
|
|
if ph.BlocksCount <= 0 {
|
|
return fmt.Errorf("blocksCount must be greater than 0; got %d", ph.BlocksCount)
|
|
}
|
|
if ph.BlocksCount > ph.RowsCount {
|
|
return fmt.Errorf("blocksCount cannot be bigger than rowsCount; got blocksCount=%d, rowsCount=%d", ph.BlocksCount, ph.RowsCount)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Reset resets the ph.
|
|
func (ph *partHeader) Reset() {
|
|
ph.RowsCount = 0
|
|
ph.BlocksCount = 0
|
|
ph.MinTimestamp = (1 << 63) - 1
|
|
ph.MaxTimestamp = -1 << 63
|
|
}
|