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package objectstorage
import (
"context"
"errors"
"sync"
"github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitlab-pages/internal/zip/reader"
)
var (
errNotExists = errors.New("domain does not exist")
)
type inMemory struct {
mu *sync.Mutex
reader *reader.Reader
}
func newInMemoryCache() *inMemory {
return &inMemory{
mu: new(sync.Mutex),
}
}
func (i *inMemory) Set(ctx context.Context, cancel func(), reader *reader.Reader) {
i.mu.Lock()
defer i.mu.Unlock()
i.reader = reader
// clears the reader when the ctx is done or cancelled
go i.clear(ctx, cancel)
}
func (i *inMemory) Reader() (*reader.Reader, error) {
i.mu.Lock()
defer i.mu.Unlock()
if i.reader == nil {
return nil, errNotExists
}
return i.reader, nil
}
func (i *inMemory) clear(ctx context.Context, cancel func()) {
<-ctx.Done()
cancel()
i.mu.Lock()
defer i.mu.Unlock()
logrus.Debug("removing expired reader")
i.reader = nil
}
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