forked from juju/charmstore
/
blobstoregc.go
75 lines (64 loc) · 1.66 KB
/
blobstoregc.go
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// Copyright 2017 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package charmstore // import "gopkg.in/juju/charmstore.v5/internal/charmstore"
import (
"time"
"gopkg.in/errgo.v1"
tomb "gopkg.in/tomb.v2"
"gopkg.in/juju/charmstore.v5/internal/monitoring"
)
var gcInterval = time.Hour
// blobstoreGC implements the worker that runs the blobstore
// garbage collector.
type blobstoreGC struct {
tomb tomb.Tomb
pool *Pool
}
// newBlobstoreGC returns a new running blobstore garbage
// collector worker.
func newBlobstoreGC(pool *Pool) *blobstoreGC {
gc := &blobstoreGC{
pool: pool,
}
gc.tomb.Go(gc.run)
return gc
}
// Kill implements worker.Worker.Kill.
func (gc *blobstoreGC) Kill() {
gc.tomb.Kill(nil)
}
// Kill implements worker.Worker.Wait.
func (gc *blobstoreGC) Wait() error {
return gc.tomb.Wait()
}
func (gc *blobstoreGC) run() error {
for {
gcDuration := monitoring.NewBlobstoreGCDuration()
logger.Infof("starting blobstore garbage collection")
if err := gc.doGC(); err != nil {
// Note: don't log the duration when there's an error.
logger.Errorf("%v", err)
} else {
logger.Infof("completed blobstore garbage collection")
gcDuration.Done()
}
select {
case <-gc.tomb.Dying():
return tomb.ErrDying
case <-time.After(gcInterval):
}
}
}
func (gc *blobstoreGC) doGC() error {
store := gc.pool.Store()
defer store.Close()
err := store.BlobStore.RemoveExpiredUploads()
if err != nil {
return errgo.Notef(err, "expired-upload garbage collection failed")
}
err = store.BlobStoreGC(time.Now().Add(-30 * time.Minute))
if err != nil {
return errgo.Notef(err, "blob garbage collection failed")
}
return nil
}