private bool ProceedWrite(string command, string key, string value)
{
var commandMessage = new DBUpdateMessage
{
Command = command,
Key = key,
Value = value,
ServerId = Config.ServerId(),
Version = _db.VersionForKey(key) + 1
};
if (!commandMessage.isValid())
{
return(false);
}
try
{
_publishSocket.Send(commandMessage.Encode());
return(true);
}
catch
{
Console.WriteLine("Exception while trying to publish db updates");
return(false);
}
}
public static DBUpdateMessage Decode(byte[] bytes)
{
try
{
var message = new DBUpdateMessage();
var decoded = MPack.ParseFromBytes(bytes);
message.Command = decoded["command"].To <string>();
message.Key = decoded["key"].To <string>();
message.Value = (message.Command == "remove") ? null : decoded["value"].To <string>();
message.Version = decoded["version"].To <int>();
message.ServerId = decoded["serverId"].To <int>();
return(message);
}
catch
{
return(null);
}
}
private void ProceedWriteCommand(DBUpdateMessage message)
{
var dbValue = new DBValue
{
Value = message.Value,
Version = message.Version,
ServerId = message.ServerId
};
if (message.Command == "set")
{
_db.Set(message.Key, dbValue);
}
else if (message.Command == "remove")
{
_db.Remove(message.Key, dbValue);
}
else
{
Console.WriteLine("Unknown command");
}
}
public void Execute()
{
byte[] buffer;
while (true)
{
Console.WriteLine("Listening...");
try
{
buffer = _socket.Receive();
var message = DBUpdateMessage.Decode(buffer);
Console.WriteLine("\t[" + message.ServerId + "] Received command '" + message.Command + "' for key: " + message.Key);
ProceedWriteCommand(message);
Console.WriteLine("\tOK");
}
catch
{
Console.WriteLine("Catch exception in subscriber");
}
}
}
