Merging performance branch into master (#4268)

* improve performance on sendNotifications

* Fix SQL queries

* Remove get direct profiles, not needed anymore

* Add raw data to error details if AppError fails to decode

* men

* Fix decode (#4052)

* Fixing json decode

* Adding unit test

* Initial work for client scaling (#4051)

* Begin adding paging to profiles API

* Added more paging functionality

* Finish hooking up admin console user lists

* Add API for searching users and add searching to all user lists

* Add lazy loading of profiles

* Revert config.json

* Fix unit tests and some style issues

* Add GetProfilesFromList to Go driver and fix web unit test

* Update etag for GetProfiles

* Updating ui for filters and pagination (#4044)

* Updating UI for pagination

* Adjusting margins for filter row

* Adjusting margin for specific modals

* Adding relative padding to system console

* Adjusting responsive view

* Update client user tests

* Minor fixes for direct messages modal (#4056)

* Remove some unneeded initial load calls (#4057)

* UX updates to user lists, added smart counts and bug fixes (#4059)

* Improved getExplicitMentions and unit tests (#4064)

* Refactor getting posts to lazy load profiles correctly (#4062)

* Comment out SetActiveChannel test (#4066)

* Profiler cpu, block, and memory profiler. (#4081)

* Fix TestSetActiveChannel unit test (#4071)

* Fixing build failure caused by dependancies updating (#4076)

* Adding profiler

* Fix admin_team_member_dropdown eslint errors

* Bumping session cache size (#4077)

* Bumping session cache size

* Bumping status cache

* Refactor how the client handles channel members to be large team friendly (#4106)

* Refactor how the client handles channel members to be large team friendly

* Change Id to ChannelId in ChannelStats model

* Updated getChannelMember and getProfilesByIds routes to match proposal

* Performance improvements (#4100)

* Performance improvements

* Fixing re-connect issue

* Fixing error message

* Some other minor perf tweaks

* Some other minor perf tweaks

* Fixing config file

* Fixing buffer size

* Fixing web socket send message

* adding some error logging

* fix getMe to be user required

* Fix websocket event for new user

* Fixing shutting down

* Reverting web socket changes

* Fixing logging lvl

* Adding caching to GetMember

* Adding some logging

* Fixing caching

* Fixing caching invalidate

* Fixing direct message caching

* Fixing caching

* Fixing caching

* Remove GetDirectProfiles from initial load

* Adding logging and fixing websocket client

* Adding back caching from bad merge.

* Explicitly close go driver requests (#4162)

* Refactored how the client handles team members to be more large team friendly (#4159)

* Refactor getProfilesForDirectMessageList API into getAllProfiles API

* Refactored how the client handles team members to be more large team friendly

* Fix js error when receiving a notification

* Fix JS error caused by current user being overwritten with sanitized version (#4165)

* Adding error message to status failure (#4167)

* Fix a few bugs caused by client scaling refactoring (#4170)

* When there is no read replica, don't open a second set of connections to the master database (#4173)

* Adding connection tacking to stats (#4174)

* Reduce DB writes for statuses and other status related changes (#4175)

* Fix bug preventing opening of DM channels from more modal (#4181)

* 	Fixing socket timing error (#4183)

* Fixing ping/pong handler

* Fixing socket timing error

* Commenting out status broadcasting

* Removing user status changes

* Removing user status changes

* Removing user status changes

* Removing user status changes

* Adding DoPreComputeJson()

* Performance improvements (#4194)

* * Fix System Console Analytics queries
* Add db.SetConnMaxLifetime to 15 minutes
* Add "net/http/pprof" for profiling
* Add FreeOSMemory() to manually release memory on reload config

* Add flag to enable http profiler

* Fix memory leak (#4197)

* Fix memory leak

* removed unneeded nil assignment

* Fixing go routine leak (#4208)

* Merge fixes

* Merge fix

* Refactored statuses to be queried by the client rather than broadcast by the server (#4212)

* Refactored server code to reduce status broadcasts and to allow getting statuses by IDs

* Refactor client code to periodically fetch statuses

* Add store unit test for getting statuses by ids

* Fix status unit test

* Add getStatusesByIds REST API and move the client over to use that instead of the WebSocket

* Adding multiple threads to websocket hub (#4230)

* Adding multiple threads to websocket hub

* Fixing unit tests

* Fixing so websocket connections from the same user end up in the same… (#4240)

* Fixing so websocket connections from the same user end up in the same list

* Removing old comment

* Refactor user autocomplete to query the server (#4239)

* Add API for autocompleting users

* Converted at mention autocomplete to query server

* Converted user search autocomplete to query server

* Switch autocomplete API naming to use term instead of username

* Split autocomplete API into two, one for channels and for teams

* Fix copy/paste error

* Some final client scaling fixes (#4246)

* Add lazy loading of profiles to integration pages

* Add lazy loading of profiles to emoji page

* Fix JS error when receiving post in select team menu and also clean up channel store

model/websocket_client.go

@@ -17,6 +17,7 @@ type WebSocketClient struct {
 	Sequence        int64           // The ever-incrementing sequence attached to each WebSocket action
 	EventChannel    chan *WebSocketEvent
 	ResponseChannel chan *WebSocketResponse
+	ListenError     *AppError
 }
 
 // NewWebSocketClient constructs a new WebSocket client with convienence
@@ -37,6 +38,7 @@ func NewWebSocketClient(url, authToken string) (*WebSocketClient, *AppError) {
 		1,
 		make(chan *WebSocketEvent, 100),
 		make(chan *WebSocketResponse, 100),
+		nil,
 	}, nil
 }
 
@@ -59,10 +61,20 @@ func (wsc *WebSocketClient) Close() {
 
 func (wsc *WebSocketClient) Listen() {
 	go func() {
+		defer func() {
+			wsc.Conn.Close()
+			close(wsc.EventChannel)
+			close(wsc.ResponseChannel)
+		}()
+
 		for {
 			var rawMsg json.RawMessage
 			var err error
 			if _, rawMsg, err = wsc.Conn.ReadMessage(); err != nil {
+				if !websocket.IsCloseError(err, websocket.CloseNormalClosure, websocket.CloseNoStatusReceived) {
+					wsc.ListenError = NewLocAppError("NewWebSocketClient", "model.websocket_client.connect_fail.app_error", nil, err.Error())
+				}
+
 				return
 			}
 
@@ -107,3 +119,12 @@ func (wsc *WebSocketClient) UserTyping(channelId, parentId string) {
 func (wsc *WebSocketClient) GetStatuses() {
 	wsc.SendMessage("get_statuses", nil)
 }
+
+// GetStatusesByIds will fetch certain user statuses based on ids and return
+// a map of string statuses using user id as the key
+func (wsc *WebSocketClient) GetStatusesByIds(userIds []string) {
+	data := map[string]interface{}{
+		"user_ids": userIds,
+	}
+	wsc.SendMessage("get_statuses_by_ids", data)
+}