/
writer.go
181 lines (157 loc) · 3.71 KB
/
writer.go
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package line
import (
"bufio"
"fmt"
"io"
"strconv"
"time"
"github.com/influxdata/influxdb/cmd/influx_tools/internal/format"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/pkg/escape"
"github.com/influxdata/influxdb/tsdb"
"github.com/influxdata/influxql"
)
type Writer struct {
w *bufio.Writer
key []byte
err error
}
func NewWriter(w io.Writer) *Writer {
var wr *bufio.Writer
if wr, _ = w.(*bufio.Writer); wr == nil {
wr = bufio.NewWriter(w)
}
return &Writer{
w: wr,
}
}
func (w *Writer) NewBucket(start, end int64) (format.BucketWriter, error) {
fmt.Fprintf(w.w, "# new shard group start: %s -> end: %s\n", time.Unix(0, start).UTC(), time.Unix(0, end).UTC())
return w, nil
}
func (w *Writer) Close() error { return w.w.Flush() }
func (w *Writer) Err() error { return w.err }
func (w *Writer) BeginSeries(name, field []byte, typ influxql.DataType, tags models.Tags) {
if w.err != nil {
return
}
w.key = models.AppendMakeKey(w.key[:0], name, tags)
w.key = append(w.key, ' ')
w.key = append(w.key, escape.Bytes(field)...)
w.key = append(w.key, '=')
}
func (w *Writer) EndSeries() {}
func (w *Writer) WriteIntegerCursor(cur tsdb.IntegerArrayCursor) {
if w.err != nil {
return
}
buf := w.key
for {
a := cur.Next()
if a.Len() == 0 {
break
}
for i := range a.Timestamps {
buf = buf[:len(w.key)] // Re-slice buf to be "<series_key> <field>=".
buf = strconv.AppendInt(buf, a.Values[i], 10)
buf = append(buf, 'i')
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, a.Timestamps[i], 10)
buf = append(buf, '\n')
if _, w.err = w.w.Write(buf); w.err != nil {
return
}
}
}
}
func (w *Writer) WriteFloatCursor(cur tsdb.FloatArrayCursor) {
if w.err != nil {
return
}
buf := w.key
for {
a := cur.Next()
if a.Len() == 0 {
break
}
for i := range a.Timestamps {
buf = buf[:len(w.key)] // Re-slice buf to be "<series_key> <field>=".
buf = strconv.AppendFloat(buf, a.Values[i], 'g', -1, 64)
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, a.Timestamps[i], 10)
buf = append(buf, '\n')
if _, w.err = w.w.Write(buf); w.err != nil {
return
}
}
}
}
func (w *Writer) WriteUnsignedCursor(cur tsdb.UnsignedArrayCursor) {
if w.err != nil {
return
}
buf := w.key
for {
a := cur.Next()
if a.Len() == 0 {
break
}
for i := range a.Timestamps {
buf = buf[:len(w.key)] // Re-slice buf to be "<series_key> <field>=".
buf = strconv.AppendUint(buf, a.Values[i], 10)
buf = append(buf, 'u')
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, a.Timestamps[i], 10)
buf = append(buf, '\n')
if _, w.err = w.w.Write(buf); w.err != nil {
return
}
}
}
}
func (w *Writer) WriteBooleanCursor(cur tsdb.BooleanArrayCursor) {
if w.err != nil {
return
}
buf := w.key
for {
a := cur.Next()
if a.Len() == 0 {
break
}
for i := range a.Timestamps {
buf = buf[:len(w.key)] // Re-slice buf to be "<series_key> <field>=".
buf = strconv.AppendBool(buf, a.Values[i])
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, a.Timestamps[i], 10)
buf = append(buf, '\n')
if _, w.err = w.w.Write(buf); w.err != nil {
return
}
}
}
}
func (w *Writer) WriteStringCursor(cur tsdb.StringArrayCursor) {
if w.err != nil {
return
}
buf := w.key
for {
a := cur.Next()
if a.Len() == 0 {
break
}
for i := range a.Timestamps {
buf = buf[:len(w.key)] // Re-slice buf to be "<series_key> <field>=".
buf = append(buf, '"')
buf = append(buf, models.EscapeStringField(a.Values[i])...)
buf = append(buf, '"')
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, a.Timestamps[i], 10)
buf = append(buf, '\n')
if _, w.err = w.w.Write(buf); w.err != nil {
return
}
}
}
}