| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 metric |
| |
| import ( |
| "context" |
| "sync/atomic" |
| "time" |
| ) |
| |
| import ( |
| "go.opentelemetry.io/otel/metric" |
| "go.opentelemetry.io/otel/metric/global" |
| |
| fc "github.com/dubbogo/dubbo-go-pixiu-filter/pkg/context" |
| "github.com/dubbogo/dubbo-go-pixiu-filter/pkg/filter" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/common/constant" |
| "github.com/apache/dubbo-go-pixiu/pkg/common/extension" |
| "github.com/apache/dubbo-go-pixiu/pkg/logger" |
| ) |
| |
| var ( |
| totalElapsed int64 |
| totalCount int64 |
| ) |
| |
| // nolint |
| func Init() { |
| extension.SetFilterFunc(constant.MetricFilter, metricFilterFunc()) |
| registerOtelMetric() |
| } |
| |
| func registerOtelMetric() { |
| meter := global.GetMeterProvider().Meter("pixiu") |
| observerElapsedCallback := func(_ context.Context, result metric.Int64ObserverResult) { |
| result.Observe(totalElapsed) |
| } |
| _ = metric.Must(meter).NewInt64SumObserver("pixiu_request_elapsed", observerElapsedCallback, |
| metric.WithDescription("request total elapsed in pixiu"), |
| ) |
| |
| observerCountCallback := func(_ context.Context, result metric.Int64ObserverResult) { |
| result.Observe(totalCount) |
| } |
| _ = metric.Must(meter).NewInt64SumObserver("pixiu_request_count", observerCountCallback, |
| metric.WithDescription("request total count in pixiu"), |
| ) |
| } |
| |
| func metricFilterFunc() fc.FilterFunc { |
| return New().Do() |
| } |
| |
| // loggerFilter is a filter for simple metric. |
| type metricFilter struct{} |
| |
| // New create metric filter. |
| func New() filter.Filter { |
| return &metricFilter{} |
| } |
| |
| // Metric filter, record url and latency |
| func (f metricFilter) Do() fc.FilterFunc { |
| return func(c fc.Context) { |
| start := time.Now() |
| |
| c.Next() |
| |
| latency := time.Now().Sub(start) |
| atomic.AddInt64(&totalElapsed, latency.Nanoseconds()) |
| atomic.AddInt64(&totalCount, 1) |
| |
| logger.Infof("[dubbo go pixiu] [UPSTREAM] receive request | %d | %s | %s | %s | ", c.StatusCode(), latency, c.GetMethod(), c.GetUrl()) |
| } |
| } |