internal ElectionVote CastVote(Election election, Membership existingMembership, HeartbeatInfo info)
{
if (election == null || election.ElectionId == null)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsWarnEnabled)
{
LoggerManager.Instance.ShardLogger.Warn("ElectionManager.CastVote()", "Invalid election.");
}
return(null);
}
ElectionVote vote = new ElectionVote();
vote.RequestingNode = election.ElectionId.RequestingNode;
vote.Sourcenode = new ServerNode();
vote.Sourcenode.Name = _context.LocalAddress.IpAddress.ToString();
vote.Sourcenode.Priority = (int)LocalServerPriority;
if (existingMembership != null && (election.ElectionType == ElectionType.GeneralElections && existingMembership.Primary == null) || election.ElectionType == ElectionType.TakeoverElections)
{
if (election.RequestingServerInfo.LastOperationId > LocalServerInfo().LastOperationId)
{
vote.NodeVote = ElectionVote.Vote.yes;
}
else if (election.RequestingServerInfo.LastOperationId == LocalServerInfo().LastOperationId)
{
if (election.ElectionId.RequestingNode.Priority <= (int)LocalServerPriority)
{
vote.NodeVote = ElectionVote.Vote.yes;
}
else
{
ShardConfiguration sConfig = null;
if (_clusterConfigMgr != null)
{
sConfig = _clusterConfigMgr.GetShardConfiguration(_context.LocalShardName);
}
int configuredNodes = 0;
if (sConfig != null || sConfig.Servers != null)
{
configuredNodes = sConfig.Servers.Nodes.Count;
}
if (info != null && info.CSStatus == ConnectivityStatus.Connected && (configuredNodes != null && existingMembership.Servers.Count >= configuredNodes / 2))
{
vote.NodeVote = ElectionVote.Vote.no;
}
else
{
vote.NodeVote = ElectionVote.Vote.yes;
}
}
}
else
{
vote.NodeVote = ElectionVote.Vote.no;
}
}
else
{
vote.NodeVote = ElectionVote.Vote.no;
}
return(vote);
}
internal Configuration.Services.ElectionResult ConductElection(ElectionId electionId, Address[] activeNodes, Activity activity)
{
Address[] votingNodes = null;
if (activeNodes == null)
{
throw new ArgumentNullException("Active nodes are null");
}
Election election = null;
if (votingNodes == null)
{
votingNodes = new Address[activeNodes.Length];
}
try
{
ElectionType electionType = ElectionType.None;
if (activity == Activity.GeneralElectionsTriggered)
{
electionType = ElectionType.GeneralElections;
}
else if (activity == Activity.TakeoverElectionsTriggered)
{
electionType = ElectionType.TakeoverElections;
}
election = new Election(electionId, electionType);
votingNodes = activeNodes;
election.RequestingServerInfo = LocalServerInfo();
if (election.StartElection(votingNodes))
{
ResponseCollection <object> response = (ResponseCollection <object>)MulticastRequest(election);
if (response != null)
{
foreach (var server in _shard.ActiveChannelsList)
{
IClusterResponse <object> serverResponse = response.GetResponse(server);
if (serverResponse.IsSuccessfull)
{
if (serverResponse.Value != null)
{
ElectionVote vote = serverResponse.Value as ElectionVote;
if (vote != null)
{
election.AddVote(vote);
}
}
}
}
}
return(election.GetElectionResult());
}
}
catch (Exception e)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("ElectionManager.ConductElection()", e.ToString());
}
}
return(null);
}