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// Copyright 2014 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License. See the AUTHORS file
// for names of contributors.
//
// Author: Tyler Neely (t@jujit.su)
package loghisto
import (
"bytes"
"fmt"
"os"
"strings"
)
type openTSDBStat struct {
Metric string
Time int64
Value float64
Tags map[string]string
}
type openTSDBStatArray []*openTSDBStat
func mapToTSDProtocolTags(tagMap map[string]string) string {
tags := make([]string, 0, len(tagMap))
for tag, value := range tagMap {
tags = append(tags, fmt.Sprintf("%s=%s", tag, value))
}
return strings.Join(tags, " ")
}
func (stats openTSDBStatArray) ToRequest() []byte {
var request bytes.Buffer
for _, stat := range stats {
request.Write([]byte(fmt.Sprintf("put %s %d %f %s\n",
stat.Metric,
stat.Time,
stat.Value,
mapToTSDProtocolTags(stat.Tags))))
}
return []byte(request.String())
}
func (metricSet *ProcessedMetricSet) toopenTSDBStats() openTSDBStatArray {
hostname, err := os.Hostname()
if err != nil {
hostname = "unknown"
}
stats := make([]*openTSDBStat, 0, len(metricSet.Metrics))
i := 0
for metric, value := range metricSet.Metrics {
var tags = map[string]string{
"host": hostname,
}
//TODO(tyler) custom tags
stats = append(stats, &openTSDBStat{
Metric: metric,
Time: metricSet.Time.Unix(),
Value: value,
Tags: tags,
})
i++
}
return stats
}
// OpenTSDBProtocol generates a wire representation of a ProcessedMetricSet
// for submission to an OpenTSDB instance.
func OpenTSDBProtocol(ms *ProcessedMetricSet) []byte {
return ms.toopenTSDBStats().ToRequest()
}
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