/// <summary>
/// Deserializes xml markup from file into an QvxRequest object
/// </summary>
/// <param name="fileName">string xml file to load and deserialize</param>
/// <param name="obj">Output QvxRequest object</param>
/// <param name="exception">output Exception value if deserialize failed</param>
/// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool LoadFromFile(string fileName, out QvxRequest obj, out System.Exception exception)
{
exception = null;
obj = default(QvxRequest);
try {
obj = LoadFromFile(fileName);
return(true);
}
catch (System.Exception ex) {
exception = ex;
return(false);
}
}
/// <summary>
/// Deserializes workflow markup into an QvxRequest object
/// </summary>
/// <param name="xml">string workflow markup to deserialize</param>
/// <param name="obj">Output QvxRequest object</param>
/// <param name="exception">output Exception value if deserialize failed</param>
/// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool Deserialize(string xml, out QvxRequest obj, out System.Exception exception)
{
exception = null;
obj = default(QvxRequest);
try {
obj = Deserialize(xml);
return(true);
}
catch (System.Exception ex) {
exception = ex;
return(false);
}
}
public QvxReply HandleQvxRequest(QvxRequest request)
{
lock (lockSendQvxRequest)
{
// TODO better request and response handling + async
this.reply = null;
this.request = request;
while (reply == null)
{
Thread.Sleep(10);
}
return(reply);
}
}
public QvxReply HandleRequest(QvxRequest request)
{
logger.Debug("HandleRequest Command:" + request.Command.ToString());
var result = new QvxReply()
{
Result = QvxResult.QVX_OK
};
try
{
switch (request.Command)
{
#region QVX_CONNECT
case QvxCommand.QVX_CONNECT:
if (request.Parameters.Count != 1)
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
logger.Warn("QvxCommand.QVX_CONNECT: request.Parameters.Count expected 1 found:" + request.Parameters.Count.ToString());
}
else
if (QvxConnectHandler == null)
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
// TODO: Parse User & Password, Config Options
//QlikView uses extra quotation around UserID and Password value if a) a value contains a
//semicolon or b) a value starts with a double quote. The Connectors that use such values have
//to modify QVX_CONNECT and QVX_EDIT_CONNECT command handling by removing
//or adding the extra quotation when it is relevant.
result = QvxConnectHandler(request.Parameters[0]);
}
break;
#endregion
#region QVX_EXECUTE
case QvxCommand.QVX_EXECUTE:
if (!((request.Parameters.Count == 2) | (request.Parameters.Count == 3)))
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
else
if (QvxRequestRawExecuteHandler != null)
{
result = QvxRequestRawExecuteHandler(request);
}
else
{
QvxExecuteCommands cmd;
if (!Enum.TryParse <QvxExecuteCommands>(request.Parameters[0], out cmd))
{
cmd = QvxExecuteCommands.SQL;
}
if (QvxExecuteHandler == null)
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
List <string> list = new List <string>();
if (request.Parameters.Count == 3)
{
list = request.Parameters[2].Split(new char[1] {
';'
}).ToList();
}
result = QvxExecuteHandler(cmd, request.Parameters[0], new QvxDataClient(request.Parameters[1]), list);
}
}
break;
#endregion
#region QVX_EDIT_CONNECT
case QvxCommand.QVX_EDIT_CONNECT:
if (request.Parameters.Count != 1)
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
else
if (QvxEditConnectHandler == null)
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
result = QvxEditConnectHandler(request.Parameters[0], request.QVWindow);
}
break;
#endregion
#region QVX_EDIT_SELECT
case QvxCommand.QVX_EDIT_SELECT:
if (request.Parameters.Count != 2)
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
else
if (QvxEditSelectHandler == null)
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
result = QvxEditSelectHandler(request.Parameters[0], request.Parameters[1], request.QVWindow);
}
break;
#endregion
#region QVX_GENERIC_COMMAND
case QvxCommand.QVX_GENERIC_COMMAND:
if (!(request.Parameters.Count > 0))
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
else
{
string command = request.Parameters[0];
QvxGenericCommands cmd;
bool validCmd = Enum.TryParse <QvxGenericCommands>(command, out cmd);
if ((QvxGenericCommandHandler == null) | (!validCmd))
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
result = QvxGenericCommandHandler(cmd);
}
}
break;
#endregion
#region QVX_DISCONNECT
case QvxCommand.QVX_DISCONNECT:
if (QvxDisconnectHandler == null)
{
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
}
else
{
result = QvxDisconnectHandler();
}
result.SetConnectionNULL = true;
break;
#endregion
#region QVX_TERMINATE
case QvxCommand.QVX_TERMINATE:
if (QvxTerminateHandler != null)
{
QvxTerminateHandler();
}
result.Result = QvxResult.QVX_OK;
result.Terminate = true;
break;
#endregion
#region QVX_GET_EXECUTE_ERROR
case QvxCommand.QVX_GET_EXECUTE_ERROR:
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
if (QvxExecuteErrorHandler != null)
{
result = QvxExecuteErrorHandler();
}
break;
#endregion
#region QVX_ABORT & QVX_PROGRESS
case QvxCommand.QVX_ABORT:
case QvxCommand.QVX_PROGRESS:
// TODO !!
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
break;
#endregion
#region Default
default:
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
break;
#endregion
}
}
catch (Exception ex)
{
logger.Error(ex);
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
return(result);
}
public QvxReply HandleRequest(QvxRequest request)
{
logger.Debug("HandleRequest Command:", request.Command);
var result = new QvxReply() { Result = QvxResult.QVX_OK };
try
{
switch (request.Command)
{
#region QVX_CONNECT
case QvxCommand.QVX_CONNECT:
if (request.Parameters.Count != 1)
{
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
logger.Warn("QvxCommand.QVX_CONNECT: request.Parameters.Count expected 1 found:" + request.Parameters.Count.ToString());
}
else
if (QvxConnectHandler == null)
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
{
// TODO: Parse User & Password, Config Options
//QlikView uses extra quotation around UserID and Password value if a) a value contains a
//semicolon or b) a value starts with a double quote. The Connectors that use such values have
//to modify QVX_CONNECT and QVX_EDIT_CONNECT command handling by removing
//or adding the extra quotation when it is relevant.
result = QvxConnectHandler(request.Parameters[0]);
}
break;
#endregion
#region QVX_EXECUTE
case QvxCommand.QVX_EXECUTE:
if (!((request.Parameters.Count == 2) | (request.Parameters.Count == 3)))
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
else
{
QvxExecuteCommands cmd;
if (!Enum.TryParse<QvxExecuteCommands>(request.Parameters[0], out cmd))
cmd = QvxExecuteCommands.SQL;
if (QvxExecuteHandler == null)
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
{
List<string> list = new List<string>();
if (request.Parameters.Count == 3)
list = request.Parameters[2].Split(new char[1] { ';' }).ToList();
result = QvxExecuteHandler(cmd, request.Parameters[0], new QvxDataClient(request.Parameters[1]), list);
}
}
break;
#endregion
#region QVX_EDIT_CONNECT
case QvxCommand.QVX_EDIT_CONNECT:
if (request.Parameters.Count != 1)
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
else
if (QvxEditConnectHandler == null)
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
result = QvxEditConnectHandler(request.Parameters[0], request.QVWindow);
break;
#endregion
#region QVX_EDIT_SELECT
case QvxCommand.QVX_EDIT_SELECT:
if (request.Parameters.Count != 2)
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
else
if (QvxEditSelectHandler == null)
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
result = QvxEditSelectHandler(request.Parameters[0], request.Parameters[1], request.QVWindow);
break;
#endregion
#region QVX_GENERIC_COMMAND
case QvxCommand.QVX_GENERIC_COMMAND:
if (!(request.Parameters.Count > 0))
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
else
{
string command = request.Parameters[0];
QvxGenericCommands cmd;
bool validCmd = Enum.TryParse<QvxGenericCommands>(command, out cmd);
if ((QvxGenericCommandHandler == null) | (!validCmd))
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
result = QvxGenericCommandHandler(cmd);
}
break;
#endregion
#region QVX_DISCONNECT
case QvxCommand.QVX_DISCONNECT:
if (QvxDisconnectHandler == null)
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
else
result = QvxDisconnectHandler();
result.SetConnectionNULL = true;
break;
#endregion
#region QVX_TERMINATE
case QvxCommand.QVX_TERMINATE:
if (QvxTerminateHandler != null)
QvxTerminateHandler();
result.Result = QvxResult.QVX_OK;
result.Terminate = true;
break;
#endregion
#region QVX_GET_EXECUTE_ERROR
case QvxCommand.QVX_GET_EXECUTE_ERROR:
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
if (QvxExecuteErrorHandler != null)
result = QvxExecuteErrorHandler();
break;
#endregion
#region QVX_ABORT & QVX_PROGRESS
case QvxCommand.QVX_ABORT:
case QvxCommand.QVX_PROGRESS:
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
break;
#endregion
#region Default
default:
result.Result = QvxResult.QVX_UNSUPPORTED_COMMAND;
break;
#endregion
}
}
catch (Exception ex)
{
logger.Error(ex);
result.Result = QvxResult.QVX_UNKNOWN_ERROR;
}
return result;
}
private void QvxCommandServerWorker()
{
using (NamedPipeServerStream pipeServer = new NamedPipeServerStream(pipeName, PipeDirection.InOut, 1))
{
pipeServer.WaitForConnection();
var buf = new byte[4];
var buf2 = new byte[4];
object state = new object();
while (running)
{
if (request != null)
{
#region Send Request
byte[] bRequest = null;
try
{
bRequest = ASCIIEncoding.ASCII.GetBytes(request.Serialize() + "\0");
request = null;
}
catch (Exception ex)
{
logger.Error(ex);
throw ex;
}
buf = BitConverter.GetBytes((Int32)bRequest.Length);
buf2[0] = buf[3];
buf2[1] = buf[2];
buf2[2] = buf[1];
buf2[3] = buf[0];
pipeServer.Write(buf2, 0, 4);
pipeServer.Write(bRequest, 0, bRequest.Length);
pipeServer.WaitForPipeDrain();
#endregion
#region Receive Response
var iar = pipeServer.BeginRead(buf, 0, 4, null, state);
while (!iar.IsCompleted)
{
Thread.Sleep(1); // TODO: add Timeout possibility
}
var count = pipeServer.EndRead(iar);
if (count != 4)
{
throw new Exception("Invalid Count Length");
}
buf2[0] = buf[3];
buf2[1] = buf[2];
buf2[2] = buf[1];
buf2[3] = buf[0];
var datalength = BitConverter.ToInt32(buf2, 0);
var data = new byte[datalength];
count = pipeServer.Read(data, 0, datalength);
if (count != datalength)
{
throw new Exception("Invalid Data Length");
}
var sdata = ASCIIEncoding.ASCII.GetString(data);
sdata = sdata.Replace("\0", "");
try
{
reply = QvxReply.Deserialize(sdata);
}
catch (Exception ex)
{
logger.Error(ex);
reply = new QvxReply()
{
Result = QvxResult.QVX_PIPE_ERROR, ErrorMessage = ex.Message
};
throw ex;
}
#endregion
}
}
}
}
public static bool LoadFromFile(string fileName, out QvxRequest obj)
{
System.Exception exception = null;
return(LoadFromFile(fileName, out obj, out exception));
}
public static bool Deserialize(string xml, out QvxRequest obj)
{
System.Exception exception = null;
return(Deserialize(xml, out obj, out exception));
}
private void QvxCommandWorker()
{
try
{
if (pipeName == null)
{
return;
}
object state = new object();
object connection = null;
using (NamedPipeClientStream pipeClient = new NamedPipeClientStream(".", pipeName, PipeDirection.InOut))
{
var buf = new byte[4];
var buf2 = new byte[4];
Int32 count = 0;
Int32 datalength = 0;
pipeClient.Connect(1000);
while (pipeClient.IsConnected)
{
try
{
#region Get QvxRequest
var iar = pipeClient.BeginRead(buf, 0, 4, null, state);
while (!iar.IsCompleted)
{
Thread.Sleep(1);
}
count = pipeClient.EndRead(iar);
if (count != 4)
{
throw new Exception("Invalid Count Length");
}
buf2[0] = buf[3];
buf2[1] = buf[2];
buf2[2] = buf[1];
buf2[3] = buf[0];
datalength = BitConverter.ToInt32(buf2, 0);
var data = new byte[datalength];
count = pipeClient.Read(data, 0, datalength);
if (count != datalength)
{
throw new Exception("Invalid Data Length");
}
var sdata = ASCIIEncoding.ASCII.GetString(data);
sdata = sdata.Replace("\0", "");
QvxRequest request;
try
{
request = QvxRequest.Deserialize(sdata);
}
catch (Exception ex)
{
logger.Error(ex);
throw ex;
}
request.QVWindow = QVWindow;
request.Connection = connection;
#endregion
#region Handle QvxRequets
QvxReply result = null;
if (HandleQvxRequest != null)
{
result = HandleQvxRequest(request);
}
if (result == null)
{
result = new QvxReply()
{
Result = QvxResult.QVX_UNKNOWN_ERROR
}
}
;
#endregion
#region Send QvxReply
sdata = " " + result.Serialize() + "\0";
datalength = sdata.Length - 4;
buf2 = ASCIIEncoding.ASCII.GetBytes(sdata);
buf = BitConverter.GetBytes(datalength);
buf2[0] = buf[3];
buf2[1] = buf[2];
buf2[2] = buf[1];
buf2[3] = buf[0];
pipeClient.Write(buf2, 0, buf2.Length);
pipeClient.WaitForPipeDrain();
#endregion
#region Handle result States
if (result.Terminate)
{
close = true;
}
if (result.Connection != null)
{
connection = result.Connection;
}
if (result.SetConnectionNULL)
{
connection = null;
}
#endregion
}
catch (Exception ex)
{
logger.Error(ex);
Thread.Sleep(500);
close = true;
}
if (close)
{
close = false;
pipeClient.Close();
}
Thread.Sleep(5);
}
}
running = false;
}
catch (Exception ex)
{
logger.Error(ex);
}
}
