github.com/aacfactory/fns@v1.2.86-0.20240310083819-80d667fc0a17/services/metrics/reporter.go (about)

     1  /*
     2   * Copyright 2023 Wang Min Xiang
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   * 	http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   */
    17  
    18  package metrics
    19  
    20  import (
    21  	"github.com/aacfactory/fns/context"
    22  	"github.com/aacfactory/fns/runtime"
    23  	"github.com/aacfactory/fns/services"
    24  	"sync"
    25  	"time"
    26  )
    27  
    28  type Reporter interface {
    29  	services.Component
    30  	Report(ctx context.Context, metric Metric)
    31  }
    32  
    33  type Event struct {
    34  	rt     *runtime.Runtime
    35  	metric Metric
    36  }
    37  
    38  var (
    39  	events = make(chan Event, 4096)
    40  	timers = sync.Pool{New: func() any {
    41  		return time.NewTimer(10 * time.Microsecond)
    42  	}}
    43  )
    44  
    45  func listen() {
    46  	for {
    47  		event, ok := <-events
    48  		if !ok {
    49  			break
    50  		}
    51  		rt := event.rt
    52  		eps := rt.Endpoints()
    53  		ctx := runtime.With(context.TODO(), event.rt)
    54  		_, _ = eps.Request(ctx, endpointName, reportFnName, event.metric)
    55  	}
    56  }
    57  
    58  func report(ctx context.Context, metric Metric) {
    59  	rt := runtime.Load(ctx)
    60  	if rt == nil {
    61  		return
    62  	}
    63  	timer := timers.Get().(*time.Timer)
    64  	select {
    65  	case <-timer.C:
    66  		break
    67  	case events <- Event{
    68  		rt:     rt,
    69  		metric: metric,
    70  	}:
    71  		break
    72  	}
    73  	timer.Reset(10 * time.Microsecond)
    74  	timers.Put(timer)
    75  }