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cleaner.go
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cleaner.go
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package groot
import (
"time"
"code.cloudfoundry.org/lager"
errorspkg "github.com/pkg/errors"
)
//go:generate counterfeiter . Cleaner
type Cleaner interface {
Clean(logger lager.Logger, threshold int64, keepImages []string, acquireLock bool) (bool, error)
}
type cleaner struct {
storeMeasurer StoreMeasurer
garbageCollector GarbageCollector
locksmith Locksmith
metricsEmitter MetricsEmitter
}
func IamCleaner(locksmith Locksmith, sm StoreMeasurer,
gc GarbageCollector, metricsEmitter MetricsEmitter,
) *cleaner {
return &cleaner{
locksmith: locksmith,
storeMeasurer: sm,
garbageCollector: gc,
metricsEmitter: metricsEmitter,
}
}
func (c *cleaner) Clean(logger lager.Logger, threshold int64, keepImages []string, acquireLock bool) (noop bool, err error) {
startTime := time.Now()
defer func() {
c.metricsEmitter.TryEmitDuration(logger, MetricImageCleanTime, time.Since(startTime))
}()
logger = logger.Session("groot-cleaning")
logger.Info("start")
defer logger.Info("end")
if threshold > 0 {
storeSize, err := c.storeMeasurer.MeasureStore(logger)
if err != nil {
return true, err
}
if threshold >= storeSize {
return true, nil
}
} else if threshold < 0 {
return true, errorspkg.New("Threshold must be greater than 0")
}
if acquireLock {
lockFile, err := c.locksmith.Lock(GlobalLockKey)
if err != nil {
return false, err
}
defer func() {
if err := c.locksmith.Unlock(lockFile); err != nil {
logger.Error("failed-to-unlock", err)
}
}()
}
return false, c.garbageCollector.Collect(logger, keepImages)
}