From 8766690c81fcefdbe0c9d85590de1eea07a908d7 Mon Sep 17 00:00:00 2001 From: George Goldberg Date: Tue, 31 Jul 2018 15:40:23 +0100 Subject: MM-10502: Only cluster master should run job schedulers. (#9174) * MM-10502: Only cluster master should run job schedulers. * Use sync.Map for thread safety. * Fix tests. --- app/cluster.go | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 app/cluster.go (limited to 'app/cluster.go') diff --git a/app/cluster.go b/app/cluster.go new file mode 100644 index 000000000..020e57c61 --- /dev/null +++ b/app/cluster.go @@ -0,0 +1,29 @@ +// Copyright (c) 2018-present Mattermost, Inc. All Rights Reserved. +// See License.txt for license information. + +package app + +import "github.com/mattermost/mattermost-server/model" + +// Registers a given function to be called when the cluster leader may have changed. Returns a unique ID for the +// listener which can later be used to remove it. If clustering is not enabled in this build, the callback will never +// be called. +func (a *App) AddClusterLeaderChangedListener(listener func()) string { + id := model.NewId() + a.clusterLeaderListeners.Store(id, listener) + return id +} + +// Removes a listener function by the unique ID returned when AddConfigListener was called +func (a *App) RemoveClusterLeaderChangedListener(id string) { + a.clusterLeaderListeners.Delete(id) +} + +func (a *App) InvokeClusterLeaderChangedListeners() { + a.Go(func() { + a.clusterLeaderListeners.Range(func(_, listener interface{}) bool { + listener.(func())() + return true + }) + }) +} -- cgit v1.2.3-1-g7c22