public static async Task<Cluster> From(string initialHost, int initialPort, ClusterConfiguration configuration)
{
//TODO: This isn't very resilient... what if the configured master is gone? We should be able to specify multiple...
var initialConnection = await Connection.ConnectAsync(initialHost, initialPort, configuration.Connections);
//TODO: We can figure out the complete picture (masters, slaves, etc) from CLUSTER NODES command.
//Setting up each node (inside ClusterNode.ConnectAsync - further down) is wasteful.
var clusterNodesCommand = Command.From("CLUSTER", "NODES");
var clusterInfoResponse = await clusterNodesCommand.SendAsync(initialConnection);
if (clusterInfoResponse.IsError)
throw ExceptionBecause.Cluster.GotErrorResponseFromClusterInfo(clusterInfoResponse);
if (clusterInfoResponse.Value.IsArray)
throw ExceptionBecause.MalformedData.InClusterInfo(clusterInfoResponse);
var otherNodes = clusterInfoResponse.Value.ToString()
.Split(new [] { '\n' }, StringSplitOptions.RemoveEmptyEntries)
.Select(s => s.Split(' '))
.Where(s => s[2].Contains("master"))
.Select(s =>
{
var hostAndPort = s[1].Split(':');
var host = hostAndPort[0];
var port = int.Parse(hostAndPort[1]);
var slotRange = HashSlotRange.From(s.Skip(8).ToArray());
return Node
.ConnectAsync(host, port, configuration.ConnectionPools, configuration.Connections)
.ContinueWith(node => (IClusterNode) new ClusterNode(node.Result, slotRange));
});
var clusterNodes = await Task.WhenAll(otherNodes);
return new Cluster(new NodeSet(clusterNodes.ToList(), configuration), configuration);
}
protected Cluster(INodeSet nodes, ClusterConfiguration configuration)
{
_nodes = nodes;
_configuration = configuration;
}