private static bool TryParseCreateServerCommand(string[] arguments, out ICommand command)
{
command = null;
if (arguments.Length != 4)
{
return(false);
}
string serverId = arguments[0];
string URL = arguments[1];
if (!int.TryParse(arguments[2], out int minDelay))
{
return(false);
}
if (!int.TryParse(arguments[3], out int maxDelay))
{
return(false);
}
if (!HttpURLs.TryParseHostAndPort(URL, out string host, out int port))
{
return(false);
}
command = new CreateServerCommand {
ServerId = serverId,
Host = host,
Port = port,
MinDelay = minDelay,
MaxDelay = maxDelay
};
return(true);
}
private static bool TryParseCreateClientCommand(string[] arguments, out ICommand command)
{
command = null;
if (arguments.Length != 3)
{
return(false);
}
string username = arguments[0];
string URL = arguments[1];
string scriptFile = arguments[2];
if (!HttpURLs.TryParseHostAndPort(URL, out string host, out int port))
{
return(false);
}
command = new CreateClientCommand {
Username = username,
Host = host,
Port = port,
ScriptFile = scriptFile
};
return(true);
}
private static void RunAdvancedVersion(ServerConfiguration serverConfig, bool file)
{
AdvancedGrpcMessageLayer.SetContext(serverConfig);
AdvancedPartitionsDB partitionsDB = new AdvancedPartitionsDB(
serverConfig.ServerId,
HttpURLs.FromHostAndPort(serverConfig.Host, serverConfig.Port));
if (file)
{
if (!partitionsDB.ConfigurePartitions(serverConfig.Filename))
{
Console.Error.WriteLine("Couldn't configure server from file.");
DisplayAdvacnedFileSyntax();
}
}
AdvancedReplicationService service = new AdvancedReplicationService(partitionsDB, serverConfig);
service.Bind();
ReliableBroadcastLayer.Instance.Start();
Console.WriteLine(
"[{0}] Server {1} running at {2} with advanced version",
DateTime.Now.ToString("HH:mm:ss"),
serverConfig.ServerId,
serverConfig.Url);
Console.WriteLine("Press any key to stop the server...");
Console.ReadKey();
ReliableBroadcastLayer.Instance.Shutdown();
}
private static void RunSimpleVersion(ServerConfiguration serverConfig, bool file)
{
SimpleGrpcMessageLayer.SetContext(serverConfig);
// Add self id so that server knows itself
SimplePartitionsDB partitionsDB = new SimplePartitionsDB(
serverConfig.ServerId,
HttpURLs.FromHostAndPort(serverConfig.Host, serverConfig.Port));
if (file)
{
if (!partitionsDB.ConfigurePartitions(serverConfig.Filename))
{
Console.Error.WriteLine("Couldn't configure server from file.");
DisplaySimpleFileSyntax();
}
}
ReplicationService service = new ReplicationService(partitionsDB, serverConfig);
// Bind handlers for messages
service.Bind();
FailureDetectionLayer.Instance.Start();
Console.WriteLine(
"[{0}] Server {1} running at {2} with simple version",
DateTime.Now.ToString("HH:mm:ss"),
serverConfig.ServerId,
serverConfig.Url);
Console.WriteLine("Press any key to stop the server...");
Console.ReadKey();
FailureDetectionLayer.Instance.Shutdown();
}
public void OnCreateClientCommand(CreateClientCommand command)
{
CreatePartitionsIfRequired();
string username = command.Username;
string url = HttpURLs.FromHostAndPort(command.Host, command.Port);
// Check if client already exists
if (!nameServiceDB.TryAddClient(username, url))
{
Console.Error.WriteLine("Client with username {0} already exists", username);
return;
}
PCSConnection connection = new PCSConnection(command.Host);
connection.CreateClientAsync(
username,
command.Port,
command.ScriptFile,
nameServiceDB.ListServers(),
config.Version)
.ContinueWith(antecedent => {
if (antecedent.Result)
{
Console.WriteLine(
"[{0}] Client started at {1}:{2}",
DateTime.Now.ToString("HH:mm:ss"),
command.Host,
command.Port);
}
else
{
// Remove inserted username if operation failed
nameServiceDB.RemoveClient(username);
}
});
}
public void OnCreateServerCommand(CreateServerCommand command)
{
string serverId = command.ServerId;
string url = HttpURLs.FromHostAndPort(command.Host, command.Port);
// Check if server already exists
if (!nameServiceDB.TryAddServer(serverId, url))
{
Console.Error.WriteLine("Server with id {0} already exists", serverId);
return;
}
PCSConnection connection = new PCSConnection(command.Host);
connection.CreateServerAsync(
serverId,
command.Port,
command.MinDelay,
command.MaxDelay,
config.Version)
.ContinueWith(antecedent => {
if (antecedent.Result)
{
Console.WriteLine(
"[{0}] Server started at {1}:{2}",
DateTime.Now.ToString("HH:mm:ss"),
command.Host,
command.Port);
}
else
{
// Remove inserted id if operation failed
nameServiceDB.RemoveServer(serverId);
}
});
}
