/
event.go
136 lines (117 loc) · 2.93 KB
/
event.go
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package ledis
import (
"errors"
"fmt"
"strconv"
"github.com/siddontang/go/hack"
)
var errInvalidEvent = errors.New("invalid event")
func formatEventKey(buf []byte, k []byte) ([]byte, error) {
if len(k) < 2 {
return nil, errInvalidEvent
}
buf = append(buf, fmt.Sprintf("DB:%2d ", k[0])...)
buf = append(buf, fmt.Sprintf("%s ", TypeName[k[1]])...)
db := new(DB)
index, _, err := decodeDBIndex(k)
if err != nil {
return nil, err
}
db.setIndex(index)
//to do format at respective place
switch k[1] {
case KVType:
key, err := db.decodeKVKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
case HashType:
key, field, err := db.hDecodeHashKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(field))
case HSizeType:
key, err := db.hDecodeSizeKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
case ListType:
key, seq, err := db.lDecodeListKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, int64(seq), 10)
case LMetaType:
key, err := db.lDecodeMetaKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
case ZSetType:
key, m, err := db.zDecodeSetKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(m))
case ZSizeType:
key, err := db.zDecodeSizeKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
case ZScoreType:
key, m, score, err := db.zDecodeScoreKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(m))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, score, 10)
case SetType:
key, member, err := db.sDecodeSetKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(member))
case SSizeType:
key, err := db.sDecodeSizeKey(k)
if err != nil {
return nil, err
}
buf = strconv.AppendQuote(buf, hack.String(key))
case ExpTimeType:
tp, key, t, err := db.expDecodeTimeKey(k)
if err != nil {
return nil, err
}
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(key))
buf = append(buf, ' ')
buf = strconv.AppendInt(buf, t, 10)
case ExpMetaType:
tp, key, err := db.expDecodeMetaKey(k)
if err != nil {
return nil, err
}
buf = append(buf, TypeName[tp]...)
buf = append(buf, ' ')
buf = strconv.AppendQuote(buf, hack.String(key))
default:
return nil, errInvalidEvent
}
return buf, nil
}