forked from uber/tchannel
/
statsdreporter.go
96 lines (78 loc) · 3.22 KB
/
statsdreporter.go
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// Copyright (c) 2015 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 stats
import (
"regexp"
"strings"
"time"
"github.com/cactus/go-statsd-client/statsd"
"github.com/uber/tchannel/golang"
)
const samplingRate = 1.0
// MetricKey is called to generate the statsd key for a given metric and tags.
var MetricKey = DefaultMetricPrefix
type statsdReporter struct {
client statsd.Statter
}
// NewStatsdReporter returns a StatsReporter that reports to statsd on the given addr.
func NewStatsdReporter(addr, prefix string) (tchannel.StatsReporter, error) {
client, err := statsd.NewBufferedClient(addr, prefix, time.Second, 0)
if err != nil {
return nil, err
}
return NewStatsdReporterClient(client), nil
}
// NewStatsdReporterClient returns a StatsReporter that reports stats to the given client.
func NewStatsdReporterClient(client statsd.Statter) tchannel.StatsReporter {
return &statsdReporter{client}
}
func (r *statsdReporter) IncCounter(name string, tags map[string]string, value int64) {
// TODO(prashant): Deal with errors in the client.
r.client.Inc(MetricKey(name, tags), value, samplingRate)
}
func (r *statsdReporter) UpdateGauge(name string, tags map[string]string, value int64) {
r.client.Gauge(MetricKey(name, tags), value, samplingRate)
}
func (r *statsdReporter) RecordTimer(name string, tags map[string]string, d time.Duration) {
r.client.TimingDuration(MetricKey(name, tags), d, samplingRate)
}
// DefaultMetricPrefix is the default mapping for metrics to statsd keys.
func DefaultMetricPrefix(name string, tags map[string]string) string {
parts := []string{"tchannel", name}
var addKeys []string
switch {
case strings.HasPrefix(name, "outbound"):
addKeys = append(addKeys, "service", "target-service", "target-endpoint")
case strings.HasPrefix(name, "inbound"):
addKeys = append(addKeys, "calling-service", "service", "endpoint")
}
for _, k := range addKeys {
v, ok := tags[k]
if !ok {
v = "no-" + k
}
parts = append(parts, clean(v))
}
return strings.Join(parts, ".")
}
var specialChars = regexp.MustCompile(`[{}/\\:\s.]`)
// clean replaces special characters [{}/\\:\s.] with '-'
func clean(keyPart string) string {
return specialChars.ReplaceAllString(keyPart, "-")
}