mirror of
https://github.com/matrix-org/dendrite
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b891c00b09
* Add RoomInfo cache, remove RoomServerRoomNID cache, ensure caches are thread-safe * Don't panic if the roomInfo isn't known yet * LRU package is already threadsafe * Use RoomInfo cache to find room version if possible in Events() * Adding comments about RoomInfoCache safety
45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
package caching
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import (
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"github.com/matrix-org/dendrite/roomserver/types"
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)
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// WARNING: This cache is mutable because it's entirely possible that
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// the IsStub or StateSnaphotNID fields can change, even though the
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// room version and room NID fields will not. This is only safe because
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// the RoomInfoCache is used ONLY within the roomserver and because it
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// will be kept up-to-date by the latest events updater. It MUST NOT be
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// used from other components as we currently have no way to invalidate
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// the cache in downstream components.
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const (
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RoomInfoCacheName = "roominfo"
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RoomInfoCacheMaxEntries = 1024
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RoomInfoCacheMutable = true
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)
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// RoomInfosCache contains the subset of functions needed for
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// a room Info cache. It must only be used from the roomserver only
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// It is not safe for use from other components.
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type RoomInfoCache interface {
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GetRoomInfo(roomID string) (roomInfo types.RoomInfo, ok bool)
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StoreRoomInfo(roomID string, roomInfo types.RoomInfo)
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}
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// GetRoomInfo must only be called from the roomserver only. It is not
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// safe for use from other components.
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func (c Caches) GetRoomInfo(roomID string) (types.RoomInfo, bool) {
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val, found := c.RoomInfos.Get(roomID)
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if found && val != nil {
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if roomInfo, ok := val.(types.RoomInfo); ok {
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return roomInfo, true
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}
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}
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return types.RoomInfo{}, false
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}
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// StoreRoomInfo must only be called from the roomserver only. It is not
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// safe for use from other components.
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func (c Caches) StoreRoomInfo(roomID string, roomInfo types.RoomInfo) {
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c.RoomInfos.Set(roomID, roomInfo)
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}
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