internal Table(TableDb tdb, ScalableDb db, string table)
{
tableName = Encoding.UTF8.GetBytes(table + "_");
this.db = db;
name = table;
this.tdb = tdb;
switch (table)
{
case "__tables":
initialized = true;
break;
default:
break;
}
}
async Task Initialize(byte[] name, TableDb db, string hostname, int port, TimeSpan timeout)
{
this.timeout = timeout;
this.name = name;
nameEnd = new byte[name.Length + 1];
nameEnd[name.Length] = 1;
this.db = db;
entry = new byte[name.Length + 16];
Buffer.BlockCopy(name, 0, entry, 0, name.Length);
Buffer.BlockCopy(id.ToByteArray(), 0, entry, name.Length, 16);
var row = TableRow.From(new { Key = entry, Hostname = hostname, port = port });
row.UseLinearHash = true;
mclient = new UdpClient(new IPEndPoint(IPAddress.Any, port));
Action recvLoop = async() => {
while (running)
{
try
{
var packet = await mclient.ReceiveAsync(); //Receive a sink.
BinaryReader mreader = new BinaryReader(new MemoryStream(packet.Buffer));
switch (mreader.ReadByte())
{
case 0:
//Ping request
await mclient.SendAsync(new byte[] { 1 }, 1, packet.RemoteEndPoint);
break;
case 1:
//Ping response
TaskCompletionSource <bool> msrc = null;
lock (pendingPings)
{
if (pendingPings.ContainsKey(packet.RemoteEndPoint))
{
msrc = pendingPings[packet.RemoteEndPoint];
pendingPings.Remove(packet.RemoteEndPoint);
}
}
msrc?.SetResult(true);
break;
case 2:
//Ping endpoint request
if (await Ping(new IPEndPoint(new IPAddress(mreader.ReadBytes(4)), mreader.ReadInt32())))
{
byte[] me = new byte[17];
me[0] = 3;
Buffer.BlockCopy(mreader.ReadBytes(16), 0, me, 1, 16);
await mclient.SendAsync(me, me.Length, packet.RemoteEndPoint);
}
break;
case 3:
//Ping endpoint response
msrc = null;
Guid ian = new Guid(mreader.ReadBytes(16));
lock (pendingPingRequests)
{
if (pendingPingRequests.ContainsKey(ian))
{
msrc = pendingPingRequests[ian];
pendingPingRequests.Remove(ian);
}
}
msrc?.SetResult(true);
break;
case 4:
//Message
NtfyMessage(new ScalableMessage()
{
From = new Guid(mreader.ReadBytes(16)), ID = new Guid(mreader.ReadBytes(16)), Message = mreader.ReadBytes(mreader.ReadInt32())
});
break;
}
}catch (Exception er)
{
}
}
};
await db["__queues"].Upsert(row);
}
public P2PQueue(byte[] name, TableDb db, string hostname, int port, TimeSpan timeout)
{
initTask = Initialize(name, db, hostname, port, timeout);
}
public TransactedDb(TableDb db)
{
this.db = db;
}