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converter.go
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/
converter.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package storage
import (
"github.com/m3db/m3/src/query/graphite/graphite"
"github.com/m3db/m3/src/query/models"
)
const (
carbonSeparatorByte = byte('.')
carbonGlobRune = '*'
)
func glob(metric string) []byte {
globLen := len(metric)
for _, c := range metric {
if c == carbonGlobRune {
globLen++
}
}
glob := make([]byte, globLen)
i := 0
for _, c := range metric {
if c == carbonGlobRune {
glob[i] = carbonSeparatorByte
i++
}
glob[i] = byte(c)
i++
}
return glob
}
func convertMetricPartToMatcher(count int, metric string) models.Matcher {
return models.Matcher{
Type: models.MatchRegexp,
Name: graphite.TagName(count),
Value: glob(metric),
}
}
func matcherTerminator(count int) models.Matcher {
return models.Matcher{
Type: models.MatchNotRegexp,
Name: graphite.TagName(count),
Value: []byte(".*"),
}
}