github.com/alibaba/ilogtail/pkg@v0.0.0-20250526110833-c53b480d046c/selfmonitor/metrics_record.go (about)

     1  // Copyright 2021 iLogtail Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package selfmonitor
    16  
    17  import (
    18  	"encoding/json"
    19  	"sync"
    20  )
    21  
    22  const SelfMetricNameKey = "__name__"
    23  const MetricLabelPrefix = "labels"
    24  const MetricCounterPrefix = "counters"
    25  const MetricGaugePrefix = "gauges"
    26  
    27  type MetricsRecord struct {
    28  	Labels []LabelPair
    29  
    30  	sync.RWMutex
    31  	MetricCollectors []MetricCollector
    32  }
    33  
    34  func (m *MetricsRecord) insertLabels(record map[string]string) {
    35  	labels := map[string]string{}
    36  	for _, label := range m.Labels {
    37  		labels[label.Key] = label.Value
    38  	}
    39  	labelsStr, _ := json.Marshal(labels)
    40  	record[MetricLabelPrefix] = string(labelsStr)
    41  }
    42  
    43  func (m *MetricsRecord) RegisterMetricCollector(collector MetricCollector) {
    44  	m.Lock()
    45  	defer m.Unlock()
    46  	m.MetricCollectors = append(m.MetricCollectors, collector)
    47  }
    48  
    49  // ExportMetricRecords is used for exporting metrics records.
    50  // It will replace Serialize in the future.
    51  func (m *MetricsRecord) ExportMetricRecords() map[string]string {
    52  	m.RLock()
    53  	defer m.RUnlock()
    54  
    55  	record := map[string]string{}
    56  	counters := map[string]string{}
    57  	gauges := map[string]string{}
    58  	m.insertLabels(record)
    59  	for _, metricCollector := range m.MetricCollectors {
    60  		metrics := metricCollector.Collect()
    61  		for _, metric := range metrics {
    62  			singleMetric := metric.Export()
    63  			if len(singleMetric) == 0 {
    64  				continue
    65  			}
    66  			valueName := singleMetric[SelfMetricNameKey]
    67  			valueValue := singleMetric[valueName]
    68  			if metric.Type() == CounterType {
    69  				counters[valueName] = valueValue
    70  			}
    71  			if metric.Type() == GaugeType {
    72  				gauges[valueName] = valueValue
    73  			}
    74  		}
    75  	}
    76  	countersStr, _ := json.Marshal(counters)
    77  	record[MetricCounterPrefix] = string(countersStr)
    78  	gaugesStr, _ := json.Marshal(gauges)
    79  	record[MetricGaugePrefix] = string(gaugesStr)
    80  	return record
    81  }