// Loop while program is running and ping trusted nodes to determine whether they are online or offline
// When a node comes online, distribute indexes to that node
public void BeginIndexDistribution()
{
DistributionDatabase ddb = new DistributionDatabase();
List<string> guidList = new List<string>();
NodeDatabase ndb = new NodeDatabase();
string online = "online";
string offline = "offline";
ddb.ResetStatus();
while (distribute)
{
guidList = ndb.SelectGUID();
foreach (string currentGUID in guidList)
{
if (Node.GetGuid() != Guid.Parse(currentGUID))
{
Thread.Sleep(1000);
ddb.InsertNode(currentGUID, offline);
if (ndb.SelectNodeTrusted(Guid.Parse(currentGUID)) == "yes")
{
Ping pingSender = new Ping();
int timeout = 100;
try
{
IPAddress ip = ndb.SelectNodeIp(Guid.Parse(currentGUID));
PingReply reply = pingSender.Send(ip, timeout);
if (reply.Status == IPStatus.Success)
{
if (ddb.GetStatus(currentGUID) == offline)
{
sendIndexes(currentGUID);
ddb.UpdateStatus(currentGUID, online);
}
}
else
{
ddb.UpdateStatus(currentGUID, offline);
}
}
catch (Exception ex)
{
Debug.Print(ex.Message);
}
}
else
{
ddb.UpdateStatus(currentGUID, offline);
}
}
}
}
}
