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raft: add 'TransferLeadership' to Node interface

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This commit is contained in:
Gyu-Ho Lee 2016-08-10 16:25:22 -07:00
parent f4141f0f51
commit e64ef3f261
1 changed files with 12 additions and 0 deletions
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12
raft/node.go
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@ -144,6 +144,9 @@ type Node interface {
// to match MemoryStorage.Compact. // to match MemoryStorage.Compact.
ApplyConfChange(cc pb.ConfChange) *pb.ConfState ApplyConfChange(cc pb.ConfChange) *pb.ConfState
// TransferLeadership attempts to transfer leadership to the given transferee.
TransferLeadership(ctx context.Context, lead, transferee uint64)
// ReadIndex request a read state. The read state will be set in the ready. // ReadIndex request a read state. The read state will be set in the ready.
// Read state has a read index. Once the application advances further than the read // Read state has a read index. Once the application advances further than the read
// index, any linearizable read requests issued before the read request can be // index, any linearizable read requests issued before the read request can be
@ -485,6 +488,15 @@ func (n *node) ReportSnapshot(id uint64, status SnapshotStatus) {
} }
} }
func (n *node) TransferLeadership(ctx context.Context, lead, transferee uint64) {
select {
// manually set 'from' and 'to', so that leader can voluntarily transfers its leadership
case n.recvc <- pb.Message{Type: pb.MsgTransferLeader, From: transferee, To: lead}:
case <-n.done:
case <-ctx.Done():
}
}
func (n *node) ReadIndex(ctx context.Context, rctx []byte) error { func (n *node) ReadIndex(ctx context.Context, rctx []byte) error {
return n.step(ctx, pb.Message{Type: pb.MsgReadIndex, Entries: []pb.Entry{{Data: rctx}}}) return n.step(ctx, pb.Message{Type: pb.MsgReadIndex, Entries: []pb.Entry{{Data: rctx}}})
} }