1 files changed, 0 insertions, 95 deletions
diff --git a/internal/caching/immutableinmemorylru.go b/internal/caching/immutableinmemorylru.go
deleted file mode 100644
index 36cd56dc..00000000
--- a/internal/caching/immutableinmemorylru.go
+++ /dev/null
@@ -1,95 +0,0 @@
-package caching
-
-import (
-	"fmt"
-
-	lru "github.com/hashicorp/golang-lru"
-	"github.com/matrix-org/gomatrixserverlib"
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
-)
-
-type ImmutableInMemoryLRUCache struct {
-	roomVersions *lru.Cache
-	serverKeys   *lru.Cache
-}
-
-func NewImmutableInMemoryLRUCache() (*ImmutableInMemoryLRUCache, error) {
-	roomVersionCache, rvErr := lru.New(RoomVersionMaxCacheEntries)
-	if rvErr != nil {
-		return nil, rvErr
-	}
-	serverKeysCache, rvErr := lru.New(ServerKeysMaxCacheEntries)
-	if rvErr != nil {
-		return nil, rvErr
-	}
-	cache := &ImmutableInMemoryLRUCache{
-		roomVersions: roomVersionCache,
-		serverKeys:   serverKeysCache,
-	}
-	cache.configureMetrics()
-	return cache, nil
-}
-
-func (c *ImmutableInMemoryLRUCache) configureMetrics() {
-	promauto.NewGaugeFunc(prometheus.GaugeOpts{
-		Namespace: "dendrite",
-		Subsystem: "caching",
-		Name:      "number_room_version_entries",
-		Help:      "The number of room version entries cached.",
-	}, func() float64 {
-		return float64(c.roomVersions.Len())
-	})
-
-	promauto.NewGaugeFunc(prometheus.GaugeOpts{
-		Namespace: "dendrite",
-		Subsystem: "caching",
-		Name:      "number_server_key_entries",
-		Help:      "The number of server key entries cached.",
-	}, func() float64 {
-		return float64(c.serverKeys.Len())
-	})
-}
-
-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)
-}
-
-func (c *ImmutableInMemoryLRUCache) GetServerKey(
-	request gomatrixserverlib.PublicKeyLookupRequest,
-) (gomatrixserverlib.PublicKeyLookupResult, bool) {
-	key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
-	val, found := c.serverKeys.Get(key)
-	if found && val != nil {
-		if keyLookupResult, ok := val.(gomatrixserverlib.PublicKeyLookupResult); ok {
-			return keyLookupResult, true
-		}
-	}
-	return gomatrixserverlib.PublicKeyLookupResult{}, false
-}
-
-func (c *ImmutableInMemoryLRUCache) StoreServerKey(
-	request gomatrixserverlib.PublicKeyLookupRequest,
-	response gomatrixserverlib.PublicKeyLookupResult,
-) {
-	key := fmt.Sprintf("%s/%s", request.ServerName, request.KeyID)
-	checkForInvalidMutation(c.roomVersions, key, response)
-	c.serverKeys.Add(request, response)
-}