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// Copyright 2017 Canonical Ltd.
//
// 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 election
import (
"github.com/hashicorp/raft"
)
// Leadership represents the leadership acquired by a server that was elected
// as leader. It exposes methods to be notified about its loss, with the server
// stepping down as leader.
type Leadership struct {
// ID of the raft server that acquired the leadership.
id raft.ServerID
// Notification about leadership being lost.
lostCh chan struct{}
}
// Create new leadership object.
func newLeadership(id raft.ServerID, lostCh chan struct{}) *Leadership {
return &Leadership{
id: id,
lostCh: lostCh,
}
}
// Lost returns a channel that gets closed when leadership is lost.
func (l *Leadership) Lost() chan struct{} {
return l.lostCh
}
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