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dendrite/syncapi/streams/template_stream.go
Neil Alexander 6348486a13
Transactional isolation for /sync (#2745)
This should transactional snapshot isolation for `/sync` etc requests.

For now we don't use repeatable read due to some odd test failures with
invites.
2022-09-30 12:48:10 +01:00

40 lines
729 B
Go

package streams
import (
"context"
"sync"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
)
type DefaultStreamProvider struct {
DB storage.Database
latest types.StreamPosition
latestMutex sync.RWMutex
}
func (p *DefaultStreamProvider) Setup(
ctx context.Context, snapshot storage.DatabaseTransaction,
) {
}
func (p *DefaultStreamProvider) Advance(
latest types.StreamPosition,
) {
p.latestMutex.Lock()
defer p.latestMutex.Unlock()
if latest > p.latest {
p.latest = latest
}
}
func (p *DefaultStreamProvider) LatestPosition(
ctx context.Context,
) types.StreamPosition {
p.latestMutex.RLock()
defer p.latestMutex.RUnlock()
return p.latest
}