/
elect.go
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/
elect.go
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// Copyright 2021 rex lv
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package memelector
import "github.com/douyu/jupiter/pkg/core/elect"
type noopLeaderElector struct {
alwaysLeader bool
callbacks []elect.LeaderElectCallback
}
var _ elect.LeaderElector = &noopLeaderElector{}
func NewAlwaysLeaderElector() elect.LeaderElector {
return &noopLeaderElector{
alwaysLeader: true,
}
}
func NewNeverLeaderElector() elect.LeaderElector {
return &noopLeaderElector{
alwaysLeader: false,
}
}
func (n *noopLeaderElector) AddCallbacks(callbacks ...elect.LeaderElectCallback) {
n.callbacks = append(n.callbacks, callbacks...)
}
func (n *noopLeaderElector) IsLeader() bool {
return n.alwaysLeader
}
func (n *noopLeaderElector) Start(stop <-chan struct{}) {
if n.alwaysLeader {
for _, callback := range n.callbacks {
callback(elect.CallbackPhasePostStarted)
}
}
}