mirror of
https://github.com/1f349/dendrite.git
synced 2024-12-29 11:36:28 +00:00
a466e9e9cc
* Experimental LRU cache for room versions * Don't accidentally try to type-assert nil * Also reduce hits on query API * Use hashicorp implementation which mutexes for us * Define const for max cache entries * Rename to be specifically immutable, panic if we try to mutate a cache entry * Review comments * Remove nil guards, give roomserver integration test a cache * go mod tidy
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
package caching
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
lru "github.com/hashicorp/golang-lru"
|
|
"github.com/matrix-org/gomatrixserverlib"
|
|
)
|
|
|
|
type ImmutableInMemoryLRUCache struct {
|
|
roomVersions *lru.Cache
|
|
}
|
|
|
|
func NewImmutableInMemoryLRUCache() (*ImmutableInMemoryLRUCache, error) {
|
|
roomVersionCache, rvErr := lru.New(RoomVersionMaxCacheEntries)
|
|
if rvErr != nil {
|
|
return nil, rvErr
|
|
}
|
|
return &ImmutableInMemoryLRUCache{
|
|
roomVersions: roomVersionCache,
|
|
}, nil
|
|
}
|
|
|
|
func checkForInvalidMutation(cache *lru.Cache, key string, value interface{}) {
|
|
if peek, ok := cache.Peek(key); ok && peek != value {
|
|
panic(fmt.Sprintf("invalid use of immutable cache tries to mutate existing value of %q", key))
|
|
}
|
|
}
|
|
|
|
func (c *ImmutableInMemoryLRUCache) GetRoomVersion(roomID string) (gomatrixserverlib.RoomVersion, bool) {
|
|
val, found := c.roomVersions.Get(roomID)
|
|
if found && val != nil {
|
|
if roomVersion, ok := val.(gomatrixserverlib.RoomVersion); ok {
|
|
return roomVersion, true
|
|
}
|
|
}
|
|
return "", false
|
|
}
|
|
|
|
func (c *ImmutableInMemoryLRUCache) StoreRoomVersion(roomID string, roomVersion gomatrixserverlib.RoomVersion) {
|
|
checkForInvalidMutation(c.roomVersions, roomID, roomVersion)
|
|
c.roomVersions.Add(roomID, roomVersion)
|
|
}
|