73 lines
2.4 KiB
Go
73 lines
2.4 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
|
|
//
|
|
// 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 cache
|
|
|
|
import (
|
|
"github.com/google/cadvisor/info"
|
|
"github.com/google/cadvisor/storage"
|
|
"github.com/google/cadvisor/storage/memory"
|
|
)
|
|
|
|
type cachedStorageDriver struct {
|
|
maxNumStatsInCache int
|
|
maxNumSamplesInCache int
|
|
cache storage.StorageDriver
|
|
backend storage.StorageDriver
|
|
}
|
|
|
|
func (self *cachedStorageDriver) AddStats(ref info.ContainerReference, stats *info.ContainerStats) error {
|
|
err := self.cache.AddStats(ref, stats)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = self.backend.AddStats(ref, stats)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (self *cachedStorageDriver) RecentStats(containerName string, numStats int) ([]*info.ContainerStats, error) {
|
|
if numStats < self.maxNumStatsInCache {
|
|
return self.cache.RecentStats(containerName, numStats)
|
|
}
|
|
return self.backend.RecentStats(containerName, numStats)
|
|
}
|
|
|
|
func (self *cachedStorageDriver) Percentiles(containerName string, cpuUsagePercentiles []int, memUsagePercentiles []int) (*info.ContainerStatsPercentiles, error) {
|
|
return self.backend.Percentiles(containerName, cpuUsagePercentiles, memUsagePercentiles)
|
|
}
|
|
|
|
func (self *cachedStorageDriver) Samples(containerName string, numSamples int) ([]*info.ContainerStatsSample, error) {
|
|
if numSamples < self.maxNumSamplesInCache {
|
|
return self.cache.Samples(containerName, numSamples)
|
|
}
|
|
return self.backend.Samples(containerName, numSamples)
|
|
}
|
|
|
|
func (self *cachedStorageDriver) Close() error {
|
|
self.cache.Close()
|
|
return self.backend.Close()
|
|
}
|
|
|
|
func MemoryCache(maxNumSamplesInCache, maxNumStatsInCache int, driver storage.StorageDriver) storage.StorageDriver {
|
|
return &cachedStorageDriver{
|
|
maxNumStatsInCache: maxNumStatsInCache,
|
|
maxNumSamplesInCache: maxNumSamplesInCache,
|
|
cache: memory.New(maxNumSamplesInCache, maxNumStatsInCache),
|
|
backend: driver,
|
|
}
|
|
}
|