github.com/galamsiva2020/kubernetes-heapster-monitoring@v0.0.0-20210823134957-3c1baa7c1e70/metrics/processors/helper.go (about)

     1  // Copyright 2015 Google Inc. All Rights Reserved.
     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 processors
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"k8s.io/heapster/metrics/core"
    21  )
    22  
    23  func aggregate(src, dst *core.MetricSet, metricsToAggregate []string) error {
    24  	for _, metricName := range metricsToAggregate {
    25  		metricValue, found := src.MetricValues[metricName]
    26  		if !found {
    27  			continue
    28  		}
    29  		aggregatedValue, found := dst.MetricValues[metricName]
    30  		if found {
    31  			if aggregatedValue.ValueType != metricValue.ValueType {
    32  				return fmt.Errorf("Aggregator: type not supported in %s", metricName)
    33  			}
    34  
    35  			if aggregatedValue.ValueType == core.ValueInt64 {
    36  				aggregatedValue.IntValue += metricValue.IntValue
    37  			} else if aggregatedValue.ValueType == core.ValueFloat {
    38  				aggregatedValue.FloatValue += metricValue.FloatValue
    39  			} else {
    40  				return fmt.Errorf("Aggregator: type not supported in %s", metricName)
    41  			}
    42  		} else {
    43  			aggregatedValue = metricValue
    44  		}
    45  		dst.MetricValues[metricName] = aggregatedValue
    46  	}
    47  	return nil
    48  }