// Prints the tree without changing the tree view state
public static String PrintTree(ZooKeeperWrapper zk, String machinesPath, String sellersPath, String stamp)
{
StringBuilder sb = new StringBuilder();
List <String> machines = zk.GetChildren(machinesPath, true);
sb.AppendLine("[" + stamp + "] Machines Tree: ");
foreach (var machine in machines)
{
var machineRecord = zk.GetData <ZNodesDataStructures.MachineNode>(machinesPath + "/" + machine, true);
sb.AppendLine("[" + stamp + "] \\-" + machine);
sb.AppendLine("[" + stamp + "] \\-P: " + String.Join(" ", machineRecord.primaryOf));
sb.AppendLine("[" + stamp + "] \\-B: " + String.Join(" ", machineRecord.backsUp));
}
sb.AppendLine("[" + stamp + "] Sellers Tree: ");
List <String> sellers = zk.GetChildren(sellersPath, true);
foreach (var seller in sellers)
{
sb.AppendLine("[" + stamp + "] \\-" + seller);
var sellerMachines = zk.GetChildren(sellersPath + "/" + seller, true);
foreach (var sellerMachine in sellerMachines)
{
var machineSellerRecord = zk.GetData <ZNodesDataStructures.SellerNode>(sellersPath + "/" + seller + "/" + sellerMachine, true);
sb.AppendLine("[" + stamp + "] \\-" + machineSellerRecord.role + ": " + sellerMachine + " " + machineSellerRecord.uri);
}
}
return(sb.ToString());
}
/// <summary>
/// Set machines subtree events. this will register the following events:
///
/// <para>1. a new machine node joins the subtree - fires MachinesNodeWatch</para>
/// <para>2. an existing machine got message or died - fires MachineNodeWatch</para>
///
/// </summary>
///
private void setMachinesChildrenWatcher()
{
try
{
List <String> machines = zk.GetChildren(MachinesPath, new MachinesNodeWatch(this)); // Watch for new nodes
foreach (var machine in machines)
{
String path = MachinesPath + "/" + machine;
zk.GetData <ZNodesDataStructures.MachineNode>(path, new MachineNodeWatch(this));
}
}
catch (Exception ex)
{
Console.WriteLine("Failed setting Machines Node children watch due to " + ex.Message);
throw ex;
}
}
public TreeView(ZooKeeperWrapper zk, String machinesPath, String sellersPath)
{
this.machinesPath = machinesPath;
this.sellersPath = sellersPath;
this.zk = zk;
var newMachinesView = zk.GetChildren(machinesPath, false);
var newSellersView = zk.GetChildren(sellersPath, false);
// Build machines tree from ZK
machinesData.Clear();
foreach (var machine in newMachinesView)
{
var machineData = zk.GetData <ZNodesDataStructures.MachineNode>(machinesPath + "/" + machine, false);
machinesData.Add(machine, machineData);
}
// Build sellers tree from ZK
sellersData.Clear();
foreach (var seller in newSellersView)
{
var sellerMachines = zk.GetChildren(sellersPath + "/" + seller, false);
if (sellerMachines.Count > 2)
{
throw new Exception("Seller " + seller + " has too many machines: " + String.Join(" ", sellerMachines));
}
Dictionary <ZNodesDataStructures.SellerNode.NodeRole, ZNodesDataStructures.SellerNode> nodeRoles = new Dictionary <ZNodesDataStructures.SellerNode.NodeRole, ZNodesDataStructures.SellerNode>();
foreach (var machine in sellerMachines)
{
var machineSellerNode = zk.GetData <ZNodesDataStructures.SellerNode>(sellersPath + "/" + seller + "/" + machine, false);
nodeRoles[machineSellerNode.role] = machineSellerNode;
}
//if (nodeRoles.Count != 2)
//{
// throw new Exception("Seller " + seller + "doesn't have needed roles " + String.Join(" ", nodeRoles.Keys.ToArray()));
//}
sellersData[seller] = new Dictionary <ZNodesDataStructures.SellerNode.NodeRole, ZNodesDataStructures.SellerNode>(nodeRoles);
}
}