public bool connect(string hostName, int port)
{
lock (threadLock)
{
try
{
if (sessionID.Length > 0)
{
return(true);
}
this.hostName = hostName;
this.port = port;
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.Connect(hostName, port);
socket.NoDelay = true;
@out = new LittleEndianDataOutputStream(new BufferedStream(new NetworkStream(socket)));
ExtendedDataInput @in = new LittleEndianDataInputStream(new BufferedStream(new NetworkStream(socket)));
string body = "connect\n";
@out.writeBytes("API 0 ");
@out.writeBytes(body.Length.ToString());
@out.writeChar('\n');
@out.writeBytes(body);
@out.flush();
string line = @in.readLine();
int endPos = line.IndexOf(' ');
if (endPos <= 0)
{
close();
return(false);
}
sessionID = line.Substring(0, endPos);
int startPos = endPos + 1;
endPos = line.IndexOf(' ', startPos);
if (endPos != line.Length - 2)
{
close();
return(false);
}
if (line[endPos + 1] == '0')
{
remoteLittleEndian = false;
@out = new BigEndianDataOutputStream(new BufferedStream(new NetworkStream(socket)));
}
else
{
remoteLittleEndian = true;
}
return(true);
}
catch (Exception ex)
{
throw ex;
}
}
}
public virtual IEntity run(string script, ProgressListener listener)
{
lock (threadLock)
{
bool reconnect = false;
if (socket == null || !socket.Connected)
{
if (sessionID.Length == 0)
{
throw new IOException("Database connection is not established yet.");
}
else
{
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.Connect(hostName, port);
@out = new LittleEndianDataOutputStream(new BufferedStream(new NetworkStream(socket)));
}
}
string body = "script\n" + script;
ExtendedDataInput @in = null;
string header = null;
try
{
@out.writeBytes((listener != null ? "API2 " : "API ") + sessionID + " ");
@out.writeBytes(AbstractExtendedDataOutputStream.getUTFlength(body, 0, 0).ToString());
@out.writeChar('\n');
@out.writeBytes(body);
@out.flush();
@in = remoteLittleEndian ? (ExtendedDataInput) new LittleEndianDataInputStream(new BufferedStream(new NetworkStream(socket))) : (ExtendedDataInput) new BigEndianDataInputStream(new BufferedStream(new NetworkStream(socket)));
header = @in.readLine();
}
catch (IOException ex)
{
if (reconnect)
{
socket = null;
throw ex;
}
try
{
tryReconnect();
@out.writeBytes((listener != null ? "API2 " : "API ") + sessionID + " ");
@out.writeBytes(AbstractExtendedDataOutputStream.getUTFlength(body, 0, 0).ToString());
@out.writeChar('\n');
@out.writeBytes(body);
@out.flush();
@in = remoteLittleEndian ? (ExtendedDataInput) new LittleEndianDataInputStream(new BufferedStream(new NetworkStream(socket))) : (ExtendedDataInput) new BigEndianDataInputStream(new BufferedStream(new NetworkStream(socket)));
header = @in.readLine();
reconnect = true;
}
catch (Exception e)
{
socket = null;
throw e;
}
}
string msg;
while (header.Equals("MSG"))
{
//read intermediate message to indicate the progress
msg = @in.readString();
if (listener != null)
{
listener.progress(msg);
}
header = @in.readLine();
}
string[] headers = header.Split(' ');
if (headers.Length != 3)
{
socket = null;
throw new IOException("Received invalid header: " + header);
}
if (reconnect)
{
sessionID = headers[0];
}
int numObject = int.Parse(headers[1]);
msg = @in.readLine();
if (!msg.Equals("OK"))
{
throw new IOException(msg);
}
if (numObject == 0)
{
return(new data.Void());
}
try
{
short flag = @in.readShort();
int form = flag >> 8;
int type = flag & 0xff;
if (form < 0 || form > MAX_FORM_VALUE)
{
throw new IOException("Invalid form value: " + form);
}
if (type < 0 || type > MAX_TYPE_VALUE)
{
throw new IOException("Invalid type value: " + type);
}
DATA_FORM df = (DATA_FORM)Enum.GetValues(typeof(DATA_FORM)).GetValue(form);
DATA_TYPE dt = (DATA_TYPE)Enum.GetValues(typeof(DATA_TYPE)).GetValue(type);
return(factory.createEntity(df, dt, @in));
}
catch (IOException ex)
{
socket = null;
throw ex;
}
}
}
