PLT-5308 Caching layer part 2 (#6973)

* Adding Reaction store cache layer example

* Implementing reaction store in new caching system.

* Redis for reaction store

* Adding redis library

* Adding invalidation for DeleteAllWithEmojiName and other minor enhancements

app/cluster_handlers.go

@@ -14,7 +14,6 @@ func RegisterAllClusterMessageHandlers() {
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_PUBLISH, ClusterPublishHandler)
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_UPDATE_STATUS, ClusterUpdateStatusHandler)
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_INVALIDATE_ALL_CACHES, ClusterInvalidateAllCachesHandler)
-	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_INVALIDATE_CACHE_FOR_REACTIONS, ClusterInvalidateCacheForReactionsHandler)
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_INVALIDATE_CACHE_FOR_WEBHOOK, ClusterInvalidateCacheForWebhookHandler)
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_INVALIDATE_CACHE_FOR_CHANNEL_POSTS, ClusterInvalidateCacheForChannelPostsHandler)
 	einterfaces.GetClusterInterface().RegisterClusterMessageHandler(model.CLUSTER_EVENT_INVALIDATE_CACHE_FOR_CHANNEL_MEMBERS_NOTIFY_PROPS, ClusterInvalidateCacheForChannelMembersNotifyPropHandler)
@@ -40,10 +39,6 @@ func ClusterInvalidateAllCachesHandler(msg *model.ClusterMessage) {
 	InvalidateAllCachesSkipSend()
 }
 
-func ClusterInvalidateCacheForReactionsHandler(msg *model.ClusterMessage) {
-	InvalidateCacheForReactionsSkipClusterSend(msg.Data)
-}
-
 func ClusterInvalidateCacheForWebhookHandler(msg *model.ClusterMessage) {
 	InvalidateCacheForWebhookSkipClusterSend(msg.Data)
 }

app/reaction.go

@@ -20,8 +20,6 @@ func SaveReactionForPost(reaction *model.Reaction) (*model.Reaction, *model.AppE
 
 		go sendReactionEvent(model.WEBSOCKET_EVENT_REACTION_ADDED, reaction, post)
 
-		InvalidateCacheForReactions(reaction.PostId)
-
 		return reaction, nil
 	}
 }
@@ -44,8 +42,6 @@ func DeleteReactionForPost(reaction *model.Reaction) *model.AppError {
 		return result.Err
 	} else {
 		go sendReactionEvent(model.WEBSOCKET_EVENT_REACTION_REMOVED, reaction, post)
-
-		InvalidateCacheForReactions(reaction.PostId)
 	}
 
 	return nil

app/web_hub.go

@@ -314,23 +314,6 @@ func InvalidateWebConnSessionCacheForUser(userId string) {
 	}
 }
 
-func InvalidateCacheForReactions(postId string) {
-	InvalidateCacheForReactionsSkipClusterSend(postId)
-
-	if einterfaces.GetClusterInterface() != nil {
-		msg := &model.ClusterMessage{
-			Event:    model.CLUSTER_EVENT_INVALIDATE_CACHE_FOR_REACTIONS,
-			SendType: model.CLUSTER_SEND_BEST_EFFORT,
-			Data:     postId,
-		}
-		einterfaces.GetClusterInterface().SendClusterMessage(msg)
-	}
-}
-
-func InvalidateCacheForReactionsSkipClusterSend(postId string) {
-	Srv.Store.Reaction().InvalidateCacheForPost(postId)
-}
-
 func (h *Hub) Register(webConn *WebConn) {
 	h.register <- webConn