package cache import ( "context" "errors" "github.com/matrix-org/dendrite/common/caching" "github.com/matrix-org/dendrite/common/keydb" "github.com/matrix-org/gomatrixserverlib" ) // A Database implements gomatrixserverlib.KeyDatabase and is used to store // the public keys for other matrix servers. type KeyDatabase struct { inner keydb.Database cache caching.ImmutableCache } func NewKeyDatabase(inner keydb.Database, cache caching.ImmutableCache) (*KeyDatabase, error) { if inner == nil { return nil, errors.New("inner database can't be nil") } if cache == nil { return nil, errors.New("cache can't be nil") } return &KeyDatabase{ inner: inner, cache: cache, }, nil } // FetcherName implements KeyFetcher func (d KeyDatabase) FetcherName() string { return "InMemoryKeyCache" } // FetchKeys implements gomatrixserverlib.KeyDatabase func (d *KeyDatabase) FetchKeys( ctx context.Context, requests map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.Timestamp, ) (map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, error) { results := make(map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult) for req := range requests { if res, cached := d.cache.GetServerKey(req); cached { results[req] = res delete(requests, req) } } fromDB, err := d.inner.FetchKeys(ctx, requests) if err != nil { return results, err } for req, res := range fromDB { results[req] = res d.cache.StoreServerKey(req, res) } return results, nil } // StoreKeys implements gomatrixserverlib.KeyDatabase func (d *KeyDatabase) StoreKeys( ctx context.Context, keyMap map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult, ) error { for req, res := range keyMap { d.cache.StoreServerKey(req, res) } return d.inner.StoreKeys(ctx, keyMap) }