move cache2 package to cache (#14921)

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/server.go

@@ -36,8 +36,6 @@ import (
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/plugin"
 	"github.com/mattermost/mattermost-server/v5/services/cache"
-	"github.com/mattermost/mattermost-server/v5/services/cache/lru"
-	"github.com/mattermost/mattermost-server/v5/services/cache2"
 	"github.com/mattermost/mattermost-server/v5/services/filesstore"
 	"github.com/mattermost/mattermost-server/v5/services/httpservice"
 	"github.com/mattermost/mattermost-server/v5/services/imageproxy"
@@ -110,9 +108,9 @@ type Server struct {
 	newStore func() store.Store
 
 	htmlTemplateWatcher     *utils.HTMLTemplateWatcher
-	sessionCache            cache2.Cache
-	seenPendingPostIdsCache cache2.Cache
-	statusCache             cache2.Cache
+	sessionCache            cache.Cache
+	seenPendingPostIdsCache cache.Cache
+	statusCache             cache.Cache
 	configListenerId        string
 	licenseListenerId       string
 	logListenerId           string
@@ -163,8 +161,6 @@ type Server struct {
 
 	CacheProvider cache.Provider
 
-	CacheProvider2 cache2.Provider
-
 	tracer                      *tracing.Tracer
 	timestampLastDiagnosticSent time.Time
 }
@@ -247,22 +243,18 @@ func NewServer(options ...Option) (*Server, error) {
 
 	// at the moment we only have this implementation
 	// in the future the cache provider will be built based on the loaded config
-	s.CacheProvider = new(lru.CacheProvider)
-
-	s.CacheProvider.Connect()
-
-	s.CacheProvider2 = cache2.NewProvider()
-	if err := s.CacheProvider2.Connect(); err != nil {
+	s.CacheProvider = cache.NewProvider()
+	if err := s.CacheProvider.Connect(); err != nil {
 		return nil, errors.Wrapf(err, "Unable to connect to cache provider")
 	}
 
-	s.sessionCache = s.CacheProvider2.NewCache(&cache2.CacheOptions{
+	s.sessionCache = s.CacheProvider.NewCache(&cache.CacheOptions{
 		Size: model.SESSION_CACHE_SIZE,
 	})
-	s.seenPendingPostIdsCache = s.CacheProvider2.NewCache(&cache2.CacheOptions{
+	s.seenPendingPostIdsCache = s.CacheProvider.NewCache(&cache.CacheOptions{
 		Size: PENDING_POST_IDS_CACHE_SIZE,
 	})
-	s.statusCache = s.CacheProvider2.NewCache(&cache2.CacheOptions{
+	s.statusCache = s.CacheProvider.NewCache(&cache.CacheOptions{
 		Size: model.STATUS_CACHE_SIZE,
 	})
 
@@ -303,7 +295,7 @@ func NewServer(options ...Option) (*Server, error) {
 					s.sqlStore,
 					s.Metrics,
 					s.Cluster,
-					s.CacheProvider2,
+					s.CacheProvider,
 				),
 				s.SearchEngine,
 				s.Config(),
@@ -702,11 +694,7 @@ func (s *Server) Shutdown() error {
 	}
 
 	if s.CacheProvider != nil {
-		s.CacheProvider.Close()
-	}
-
-	if s.CacheProvider2 != nil {
-		if err = s.CacheProvider2.Close(); err != nil {
+		if err = s.CacheProvider.Close(); err != nil {
 			mlog.Error("Unable to cleanly shutdown cache", mlog.Err(err))
 		}
 	}