public async Task <HttpResponseMessage> Leave([FromUri] string name)
{
await RaftEngine.RemoveFromClusterAsync(new NodeConnectionInfo
{
Name = name
});
return(new HttpResponseMessage(HttpStatusCode.Accepted));
}
public async Task SendLeaveAsync(NodeConnectionInfo node)
{
try
{
if (raftEngine.Options.SelfConnection == node)
{
await raftEngine.StepDownAsync().ConfigureAwait(false);
raftEngine.WaitForLeaderConfirmed();
}
else
{
// remove node from cluster by excluding it from topology
await raftEngine.RemoveFromClusterAsync(node).ConfigureAwait(false);
return;
}
}
catch (NotLeadingException)
{
}
await SendLeaveClusterInternalAsync(raftEngine.GetLeaderNode(WaitForLeaderTimeoutInSeconds), node).ConfigureAwait(false);
}
public async Task SendLeaveAsync(NodeConnectionInfo node)
{
try
{
if (raftEngine.Options.SelfConnection == node)
{
await raftEngine.StepDownAsync().ConfigureAwait(false);
raftEngine.WaitForLeader();
}
else
{
// before we send remove from cluster wait until configuration will be propaged
// to avoid: Cannot modify the cluster topology when the committed index ___ is in term ___ but the current term is ___
// Wait until the leader finishes committing entries from the current term and try again
await Task.Delay(raftEngine.Options.HeartbeatTimeout * 2).ConfigureAwait(false);
// remove node from cluster by excluding it from topology
await raftEngine.RemoveFromClusterAsync(node).ConfigureAwait(false);
// since both remove from cluster and sendInitialize new cluster are send from current leader
// we have to wait for first topology to apply on removing node
await Task.Delay(raftEngine.Options.HeartbeatTimeout *2).ConfigureAwait(false);
// send information to leaved node to create new single node topology
await SendInitializeNewClusterForAsync(node).ConfigureAwait(false);
return;
}
}
catch (NotLeadingException)
{
}
await SendLeaveClusterInternalAsync(raftEngine.GetLeaderNode(WaitForLeaderTimeoutInSeconds), node).ConfigureAwait(false);
}
