82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
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/*
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Copyright 2016 The Smudge Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package smudge
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import "sync"
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var broadcastListeners = struct {
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sync.RWMutex
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s []BroadcastListener
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}{s: make([]BroadcastListener, 0, 16)}
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var statusListeners = struct {
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sync.RWMutex
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s []StatusListener
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}{s: make([]StatusListener, 0, 16)}
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// BroadcastListener is the interface that must be implemented to take advantage
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// of the cluster member status update notification functionality provided by
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// the AddBroadcastListener() function.
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type BroadcastListener interface {
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// The OnChange() function is called whenever the node is notified of any
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// change in the status of a cluster member.
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OnBroadcast(broadcast *Broadcast)
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}
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// AddBroadcastListener allows the submission of a BroadcastListener implementation
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// whose OnChange() function will be called whenever the node is notified of any
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// change in the status of a cluster member.
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func AddBroadcastListener(listener BroadcastListener) {
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broadcastListeners.Lock()
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broadcastListeners.s = append(broadcastListeners.s, listener)
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broadcastListeners.Unlock()
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}
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func doBroadcastUpdate(broadcast *Broadcast) {
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broadcastListeners.RLock()
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for _, sl := range broadcastListeners.s {
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sl.OnBroadcast(broadcast)
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}
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broadcastListeners.RUnlock()
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}
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// StatusListener is the interface that must be implemented to take advantage
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// of the cluster member status update notification functionality provided by
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// the AddStatusListener() function.
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type StatusListener interface {
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// The OnChange() function is called whenever the node is notified of any
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// change in the status of a cluster member.
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OnChange(node *Node, status NodeStatus)
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}
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// AddStatusListener allows the submission of a StatusListener implementation
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// whose OnChange() function will be called whenever the node is notified of any
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// change in the status of a cluster member.
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func AddStatusListener(listener StatusListener) {
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statusListeners.Lock()
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statusListeners.s = append(statusListeners.s, listener)
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statusListeners.Unlock()
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}
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func doStatusUpdate(node *Node, status NodeStatus) {
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statusListeners.RLock()
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for _, sl := range statusListeners.s {
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sl.OnChange(node, status)
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}
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statusListeners.RUnlock()
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}
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