/
metrics.go
81 lines (70 loc) · 2.31 KB
/
metrics.go
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// Copyright 2024 The Bucketeer 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.
package client
import (
"context"
"strings"
"sync"
"github.com/prometheus/client_golang/prometheus"
"google.golang.org/grpc"
"google.golang.org/grpc/status"
"github.com/bucketeer-io/bucketeer/pkg/metrics"
)
const rpcTypeUnary = "Unary"
var (
registerOnce sync.Once
startedCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: "bucketeer",
Subsystem: "grpc",
Name: "client_started_total",
Help: "Total number of RPCs started on the client.",
}, []string{"type", "service", "method"})
handledCounter = prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: "bucketeer",
Subsystem: "grpc",
Name: "client_handled_total",
Help: "Total number of RPCs completed by the client, regardless of success or failure.",
}, []string{"type", "service", "method", "code"})
)
func registerMetrics(r metrics.Registerer) {
registerOnce.Do(func() {
r.MustRegister(startedCounter, handledCounter)
})
}
func MetricsUnaryClientInterceptor() grpc.UnaryClientInterceptor {
return func(
ctx context.Context,
method string,
req, reply interface{},
cc *grpc.ClientConn,
invoker grpc.UnaryInvoker,
opts ...grpc.CallOption,
) error {
serviceName, methodName := splitFullMethodName(method)
startedCounter.WithLabelValues(rpcTypeUnary, serviceName, methodName).Inc()
err := invoker(ctx, method, req, reply, cc, opts...)
handledCounter.WithLabelValues(rpcTypeUnary, serviceName, methodName, status.Code(err).String()).Inc()
return err
}
}
func splitFullMethodName(fullMethodName string) (string, string) {
// format: /package.service/method
parts := strings.Split(fullMethodName, "/")
if len(parts) != 3 {
return "unknown", "unknown"
}
return parts[1], parts[2]
}