restic/internal/repository/packer_uploader.go

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package repository
import (
"context"
"github.com/restic/restic/internal/restic"
"golang.org/x/sync/errgroup"
)
// SavePacker implements saving a pack in the repository.
type SavePacker interface {
savePacker(ctx context.Context, t restic.BlobType, p *Packer) error
}
type uploadTask struct {
packer *Packer
tpe restic.BlobType
}
type packerUploader struct {
uploadQueue chan uploadTask
}
func newPackerUploader(ctx context.Context, wg *errgroup.Group, repo SavePacker, connections uint) *packerUploader {
pu := &packerUploader{
uploadQueue: make(chan uploadTask),
}
for i := 0; i < int(connections); i++ {
wg.Go(func() error {
for {
select {
case t, ok := <-pu.uploadQueue:
if !ok {
return nil
}
err := repo.savePacker(ctx, t.tpe, t.packer)
if err != nil {
return err
}
case <-ctx.Done():
return ctx.Err()
}
}
})
}
return pu
}
func (pu *packerUploader) QueuePacker(ctx context.Context, t restic.BlobType, p *Packer) (err error) {
select {
case <-ctx.Done():
return ctx.Err()
case pu.uploadQueue <- uploadTask{tpe: t, packer: p}:
}
return nil
}
func (pu *packerUploader) TriggerShutdown() {
close(pu.uploadQueue)
}