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// Copyright 2016 Michal Witkowski. All Rights Reserved.
// See LICENSE for licensing terms.
package grpc_prometheus
import (
"time"
"github.com/prometheus/client_golang/prometheus"
"google.golang.org/grpc/codes"
)
type clientReporter struct {
metrics *ClientMetrics
rpcType grpcType
serviceName string
methodName string
startTime time.Time
}
func newClientReporter(m *ClientMetrics, rpcType grpcType, fullMethod string) *clientReporter {
r := &clientReporter{
metrics: m,
rpcType: rpcType,
}
if r.metrics.clientHandledHistogramEnabled {
r.startTime = time.Now()
}
r.serviceName, r.methodName = splitMethodName(fullMethod)
r.metrics.clientStartedCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
return r
}
// timer is a helper interface to time functions.
type timer interface {
ObserveDuration() time.Duration
}
type noOpTimer struct {
}
func (noOpTimer) ObserveDuration() time.Duration {
return 0
}
var emptyTimer = noOpTimer{}
func (r *clientReporter) ReceiveMessageTimer() timer {
if r.metrics.clientStreamRecvHistogramEnabled {
hist := r.metrics.clientStreamRecvHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName)
return prometheus.NewTimer(hist)
}
return emptyTimer
}
func (r *clientReporter) ReceivedMessage() {
r.metrics.clientStreamMsgReceived.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
}
func (r *clientReporter) SendMessageTimer() timer {
if r.metrics.clientStreamSendHistogramEnabled {
hist := r.metrics.clientStreamSendHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName)
return prometheus.NewTimer(hist)
}
return emptyTimer
}
func (r *clientReporter) SentMessage() {
r.metrics.clientStreamMsgSent.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
}
func (r *clientReporter) Handled(code codes.Code) {
r.metrics.clientHandledCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName, code.String()).Inc()
if r.metrics.clientHandledHistogramEnabled {
r.metrics.clientHandledHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Observe(time.Since(r.startTime).Seconds())
}
}
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