public async Task <HeartBeatResponse> Handle(HeartBeat heartBeat)
{
try
{
///接受到了消息 停止计时 等待处理
_electionTimer.Change(Timeout.Infinite, Timeout.Infinite);
_logger.LogInformation($"接收到来自{heartBeat.LeaderId} 任期 {heartBeat.Term} 的心跳");
var rs = new HeartBeatResponse();
///获取当前节点最新的区块
var currentBlock = _blockDataManager.GetLastBlockEntity(_node.GetChannelId());
//如果区块为0则初始化区块对象
if (currentBlock == null)
{
currentBlock = new QMBlockSDK.MongoModel.MongoBlock();
currentBlock.Header.Number = -1;
currentBlock.Header.Term = -1;
}
rs.Term = CurrentState.CurrentTerm;
rs.LeaderId = CurrentState.LeaderId;
rs.Height = currentBlock.Header.Number;
rs.BlockCurrentHash = currentBlock.Header.DataHash;
rs.BlockPreviousHash = currentBlock.Header.PreviousHash;
rs.LeaderId = CurrentState.LeaderId;
rs.Success = false;
//当前任期大于leader任期 返回当前任期，leaderID和最新日志信息
if (CurrentState.CurrentTerm > heartBeat.Term)
{
return(rs);
}
//任期小于等于leader任期，
//则返回最新日志,改变自身状态(觉得自身状态和自己最新的日志的任期一致)
else
{
CurrentState.LeaderId = heartBeat.LeaderId;
CurrentState.CurrentTerm = heartBeat.Term;
rs.LeaderId = heartBeat.LeaderId;
rs.Success = true;
_logger.LogInformation("请求合法，刷新选举计时器");
//同步指定高度的区块
await SynchronizedBlockAsync(heartBeat.Height);
//接收成功的信息才刷新计时器
//ResetElectionTimer();
return(rs);
}
}
finally
{
//接收成功的信息才刷新计时器
ResetElectionTimer();
}
}
/// <summary>
/// 接受来自leader节点的请求时，会接受 同步区块
/// </summary>
/// <returns></returns>
private async Task SynchronizedBlockAsync(long number)
{
var lastBlock = _blockDataManager.GetLastBlockEntity(_node.GetChannelId());
if (lastBlock == null)
{
lastBlock = new QMBlockSDK.MongoModel.MongoBlock();
lastBlock.Header.Number = -1;
lastBlock.Header.Term = -1;
}
if (lastBlock.Header.Number >= number)
{
return;
}
var peer = _configProviders.GetPeer(CurrentState.LeaderId);
//当前block的信息
var append = new AppendEntries();
append.ChannelId = _node.GetChannelId();
append.Term = CurrentState.CurrentTerm;
append.LeaderId = CurrentState.LeaderId;
append.BlockHeight = lastBlock.Header.Number;
append.BlockHash = lastBlock.Header.DataHash;
append.BlockTerm = lastBlock.Header.Term;
var rs = await peer.Request(append);
if (!rs.Success)
{
_logger.LogWarning("请求区块错误", Newtonsoft.Json.JsonConvert.SerializeObject(append));
return;
}
if (rs.BlockEntity == null)
{
return;
}
//如果区块不等于空 则 验证区块
//区块保存
_blockDataManager.PutOnChainBlockAsync(rs.BlockEntity.ToBlock());
}