I'm trying to connect to a ForexTrading broker FIX API and do some trading.
I tried my best to read through the Quickfix for .net. and almost understand the process of how the quickfix works. However, when I try to initiate the socketinitiator, I failed to do that and there are no complaints and exceptions from VS 2012. It is simply stuck there.
Here's my code:
private void iFind_ItemClick(object sender, ItemClickEventArgs e)
{
try
{
QuickFix.SessionSettings settings = new QuickFix.SessionSettings("C:\\Users\\Administrator\\Documents\\My Box Files(shewenhao#hotmail.com)\\Work With Mr.Liu\\ForexAutoTradingSystem\\ForexAutoTradingSystem\\integralfix.cfg");
IntegralFixAPI integralFixAPIApplication = new IntegralFixAPI();
QuickFix.IMessageStoreFactory storeFactory = new QuickFix.FileStoreFactory(settings);
QuickFix.ILogFactory logFactory = new QuickFix.ScreenLogFactory(settings);
QuickFix.Transport.SocketInitiator initiator = new QuickFix.Transport.SocketInitiator(
integralFixAPIApplication, storeFactory, settings, logFactory);
MessageBox.Show(settings.ToString());
integralFixAPIApplication.MyInitiator = initiator;
initiator.Start();
while (true)
{
Thread.Sleep(200);
MessageBox.Show("true");
}
//initiator.Stop();
}
catch (System.Exception systeme)
{
Console.WriteLine(systeme.Message);
Console.WriteLine(systeme.StackTrace);
}
}
You may notice that I have a MessageBox right below the SocketInitiator and it pops up before this QuickFix.Transport.SocketInitiator line. I do not get it that why I failed at this point. On the page of quickfix .Net http://quickfixn.org/tutorial/creating-an-application, it says that you simply need to replace the threadedacceptor with the socketinitiator. However, I can not pass through this initiation line.
Related
I am getting the error: "ExecuteReader requires an open connection" and I know the fix is to add a connection.Open() / connection.Close(). My question pertaining to this error is more for me to understand exactly what happen under the hood.
I am currently using the "USING" statement which I expect it to open and close/dispose the connection for me. So I guess I don't understand why it didn't work as expected and I needed to explicitly code the connection.Open() / connection.Close() myself to fix the issue. I did some research and found people experienced similar issue because they were using static connection. In my case, I am creating a new instance of the connection... hence, it bothers me and hoping to get to the bottom of this instead of just fix it and move on. Thank you in advance.
Here is the code:
try
{
using (SqlConnection connection = new SqlConnection(myConnStr))
using (SqlCommand command = new SqlCommand("mySPname", connection))
{
command.CommandType = CommandType.StoredProcedure;
//add some parameters
SqlParameter retParam = command.Parameters.Add("#RetVal", SqlDbType.VarChar);
retParam.Direction = ParameterDirection.ReturnValue;
/////////////////////////////////////////////////
// fix - add this line of code: connection.Open();
/////////////////////////////////////////////////
using(SqlDataReader dr = command.ExecuteReader())
{
int success = (int)retParam.Value;
// manually close the connection here if manually open it. Code: connection.Close();
return Convert.ToBoolean(success);
}
}
}
catch (Exception ex)
{
throw;
}
Using does not open any connections, it only disposes of any allocated memory after calling End Using.
For the SqlConnection, you have to explicitly open it inside the using block, you just don't need to close it though.
I also notice that you are missing a set of brackets {} around the using SqlConnection. Maybe that's the issue? It should be like this:
try
{
using (SqlConnection connection = new SqlConnection(myConnStr))
{
connection.Open();
using (SqlCommand command = new SqlCommand("InsertProcessedPnLFile", connection))
{
command.CommandType = CommandType.StoredProcedure;
//add some parameters
SqlParameter retParam = command.Parameters.Add("#RetVal", SqlDbType.VarChar);
retParam.Direction = ParameterDirection.ReturnValue;
/////////////////////////////////////////////////
// fix - add this line of code: connection.Open();
/////////////////////////////////////////////////
using(SqlDataReader dr = command.ExecuteReader())
{
int success = (int)retParam.Value;
// manually close the connection here if manually open it. Code: connection.Close();
return Convert.ToBoolean(success);
}
}
}
}
Writing to remote MSMQ seems to be working on/off. I am not sure what is wrong and what else to do to confirm sending.
I am reluctant to setup some kind of ack. It seems to be an overkill.
using (var queue = new MessageQueue(queueName, QueueAccessMode.Send))
{
var messageQueueTransaction = new MessageQueueTransaction();
messageQueueTransaction.Begin();
try
{
queue.Formatter = new XmlMessageFormatter(new Type[] { typeof(EmailMessage) });
var msg = new Message();
msg.Label = emailMessage.Subject;
msg.Body = emailMessage;
queue.Send(msg, messageQueueTransaction);
messageQueueTransaction.Commit();
}
catch (Exception e)
{
LoggerLib.Logger.ErrorException(e, "Error Sending Email using MSMQ", emailMessage);
messageQueueTransaction.Abort();
}
finally
{
queue.Close();
}
}
The Connection string for MSMQ is in the format of:"FormatName:DIRECT=OS:FULLMACHINENAME\private$\emailmessagequeue"
Also, I used "FormatName:DIRECT:TCP:IPAddress\private$\emailmessagequeue".
It works without a glitch when I ran it locally. So, I allowed Everyone to have Full access and It still doesn't work.
Any ideas?
The port number 1801 was blocked. That resolved it. –
I am trying to implement Facebook X_FACEBOOK_PLATFORM SASL mechanism so I could integrate Facebook Chat to my application over XMPP.
Here is the code:
var ak = "my app id";
var sk = "access token";
var aps = "my app secret";
using (var client = new TcpClient())
{
client.Connect("chat.facebook.com", 5222);
using (var writer = new StreamWriter(client.GetStream())) using (var reader = new StreamReader(client.GetStream()))
{
// Write for the first time
writer.Write("<stream:stream xmlns=\"jabber:client\" xmlns:stream=\"http://etherx.jabber.org/streams\" version=\"1.0\" to=\"chat.facebook.com\"><auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"X-FACEBOOK-PLATFORM\" /></stream:stream>");
writer.Flush();
Thread.Sleep(500);
// I am pretty sure following works or at least it's not what causes the error
var challenge = Encoding.UTF8.GetString(Convert.FromBase64String(XElement.Parse(reader.ReadToEnd()).Elements().Last().Value)).Split('&').Select(s => s.Split('=')).ToDictionary(s => s[0], s => s[1]);
var response = new SortedDictionary<string, string>() { { "api_key", ak }, { "call_id", DateTime.Now.Ticks.ToString() }, { "method", challenge["method"] }, { "nonce", challenge["nonce"] }, { "session_key", sk }, { "v", "1.0" } };
var responseString1 = string.Format("{0}{1}", string.Join(string.Empty, response.Select(p => string.Format("{0}={1}", p.Key, p.Value)).ToArray()), aps);
byte[] hashedResponse1 = null;
using (var prov = new MD5CryptoServiceProvider()) hashedResponse1 = prov.ComputeHash(Encoding.UTF8.GetBytes(responseString1));
var builder = new StringBuilder();
foreach (var item in hashedResponse1) builder.Append(item.ToString("x2"));
var responseString2 = Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Format("{0}&sig={1}", string.Join("&", response.Select(p => string.Format("{0}={1}", p.Key, p.Value)).ToArray()), builder.ToString().ToLower()))); ;
// Write for the second time
writer.Write(string.Format("<response xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\">{0}</response>", responseString2));
writer.Flush();
Thread.Sleep(500);
MessageBox.Show(reader.ReadToEnd());
}
}
I shortened and shrunk the code as much as possible, because I think my SASL implementation (whether it works or not, I haven't had a chance to test it yet) is not what causes the error.
I get the following exception thrown at my face: Unable to read data from the transport connection: An established connection was aborted by the software in your host machine.
10053
System.Net.Sockets.SocketError.ConnectionAborted
It happens every time I try to read from client's stream for the second time. As you can see i pause a thread here so Facebook server has enough time to answer me, but I used asynchronous approach before and I encountered the exact same thing, so I decided to try it synchronously first. Anyway actual SASL mechanism implementation really shouldn't cause this because if I don't try to authenticate right away, but I send the request to see what mechanisms server uses and select that mechanism in another round of reading and writing, it fails, but when I send mechanism selection XML right away, it works and fails on whatever second I send.
So the conclusion is following: I open the socket connection, write to it, read from it (first read works both sync and async), write to it for the second time and try to read from it for the second time and here it always fails. Clearly then, problem is with socket connection itself. I tried to use new StreamReader for second read but to no avail. This is rather unpleasant since I would really like to implement facade over NetworkStream with "Received" event or something like Send(string data, Action<string> responseProcessor) to get some comfort working with that stream, and I already had the implementation, but it also failed on second read.
Thanks for your suggestions.
Edit: Here is the code of facade over NetworkStream. Same thing happens when using this asynchronous approach, but couple of hours ago it worked, but for second response returned same string as for first. I can't figute out what I changed in a meantime and how.
public void Send(XElement fragment)
{
if (Sent != null) Sent(this, new XmppEventArgs(fragment));
byte[] buffer = new byte[1024];
AsyncCallback callback = null;
callback = (a) =>
{
var available = NetworkStream.EndRead(a);
if (available > 0)
{
StringBuilder.Append(Encoding.UTF8.GetString(buffer, 0, available));
NetworkStream.BeginRead(buffer, 0, buffer.Length, callback, buffer);
}
else
{
var args = new XmppEventArgs(XElement.Parse(StringBuilder.ToString()));
if (Received != null) Received(this, args);
StringBuilder = new StringBuilder();
// NetworkStream.BeginRead(buffer, 0, buffer.Length, callback, buffer);
}
};
NetworkStream.BeginRead(buffer, 0, buffer.Length, callback, buffer);
NetworkStreamWriter.Write(fragment);
NetworkStreamWriter.Flush();
}
The reader.ReadToEnd() call consumes everything until end-of-stream, i.e. until TCP connection is closed.
The following code listens for an incoming sms, takes all the spaces out of the sms then emails the edited sms. Everything works fine, except that the app fails to send an email. Can anyone see what I am doing wrong and help me?
new Thread() {
public void run() {
try {
DatagramConnection _dc =
(DatagramConnection)Connector.open("sms://");
for(;;) { //'For-Loop' used to listen continously for incoming sms's
Datagram d = _dc.newDatagram(_dc.getMaximumLength());
_dc.receive(d); //The sms is received
byte[] bytes = d.getData();
String address = d.getAddress(); //The address of the sms is put on a string.
String msg = new String(bytes); //The body of the sms is put on a string.
String msg2 = (replaceAll(msg, " ","")) ; //
Store store = Session.getDefaultInstance().getStore();
Folder[] folders = store.list(Folder.SENT);
Folder sentfolder = folders[0]; //Retrieve the sent folder
Message in = new Message(sentfolder);
Address recipients[] = new Address[1];
recipients[0]= new Address("me#yahoo.com", "user");
in.addRecipients(Message.RecipientType.TO, recipients);
in.setSubject("Incoming SMS"); //The subject of the message is added
in.setContent("You have just received an SMS from: " + address + "/n" + "Message: " + msg2); //Here the body of the message is formed
in.setPriority(Message.Priority.HIGH); //The priority of the message is set.
Transport.send(in); //The message is sent
in.setFlag(Message.Flag.OPENED, true);
Folder folder = in.getFolder(); //The message is deleted from the sent folder
folder.deleteMessage(in);
}
}catch (Exception me) { //All Exceptions are caught
}
}
};
public static String replaceAll(String front, String pattern, String back) {
if (front == null)
return "";
StringBuffer sb = new StringBuffer(); //A StringBufffer is created
int idx = -1;
int patIdx = 0;
while ((idx = front.indexOf(pattern, patIdx)) != -1) {
sb.append(front.substring(patIdx, idx));
sb.append(back);
patIdx = idx + pattern.length();
}
sb.append(front.substring(patIdx));
return sb.toString();
}
Thanks
This isn't really an answer to the problem, just an elaboration on my comment above, that might help.
Make sure do something in your exception catch block, so that problems in the code don't go unnoticed. It's possible that your code is not encountering any exceptions, but in order for us to help, we need to try to eliminate potential problems, and since you say the code isn't working, but you have an empty exception handler, that's an easy area to fix first.
the simplest handler is just:
try {
// try sending sms here
} catch (Exception e) {
e.printStackTrace();
}
If you can run this in the debugger (which I highly suggest), then you can now put a breakpoint on the e.printStackTrace() line, and see if it ever gets hit. If it does, inspect the value of e and tell us what it is.
Normally, in my programs, I don't actually use e.printStackTrace() in catch handlers, but I have a logging class that takes strings, and maybe a log level (e.g. info, warning, error, verbose), and writes to a log file. The log file can be attached to emails the users send to tech support, or can be disabled for production if you only want to use the feature while developing.
Anyway, start with a simple printStackTrace() and see if it ever gets hit. Then, report back.
Edit: from the symptoms you describe in the comments after your question, it seems like it's a possibility that
String msg2 = (replaceAll(msg, " ","")) ; //
is throwing an exception, and therefore never letting you get to where you'd send the email. I can't see anything wrong with your implementation of replaceAll() upon initial inspection, but that might be a place to look. Has that implementation been thoroughly unit-tested?
Also, I think you have a "/n" in your code where you probably want a "\n", right?
I want to make a plugin for Eclipse. The thing is that I looked into the API, and examples, and I managed to make a button on main bar, with a specific icon, and when I click it, open up an InputDialog.
The hard part, is that I want to start an aplication from this button, but not with Runtime as it was a new process. I simply want to start a class inside plugin, which will log in to a server and get some output from it. I want it to be opened in a console, like launching a normal application, or a separate console.
The best example of this kind is a Tomcat plugin which starts Tomcat, and then outputs the console to the Eclipse console. I want to do that too. I've looked at the Tomcat source plugin, but I got stuck there too. They use their own launcher.
I am not sure what you mean by "I want to simply start a class". I assume there is a command line tool that you want to execute and redirect its output to the console window.
To be able to do that without spawning a new process, you have to be able to control the output stream of the tool. If it cannot be controlled, then you have no choice but to start a new process to properly capture the tool's output.
It is technically possible to call System.setOut instead, but it will redirect output from all threads to your console which is not what you want.
Nevertheless you start by creating a console:
// function findConsole copied from:
// http://wiki.eclipse.org/FAQ_How_do_I_write_to_the_console_from_a_plug-in%3F
private MessageConsole findConsole(String name) {
ConsolePlugin plugin = ConsolePlugin.getDefault();
IConsoleManager conMan = plugin.getConsoleManager();
IConsole[] existing = conMan.getConsoles();
for (int i = 0; i < existing.length; i++)
if (name.equals(existing[i].getName()))
return (MessageConsole) existing[i];
//No console found, so create a new one.
MessageConsole myConsole = new MessageConsole(name, null);
conMan.addConsoles(new IConsole[]{myConsole});
return myConsole;
}
// Find my console
MessageConsole cons = findConsole("MyTool Console");
MessageConsoleStream out = cons.newMessageStream();
// Optionally get it's input stream so user can interact with my tool
IOConsoleInputStream in = cons.getInputStream();
// Optionally make a differently coloured error stream
MessageConsoleStream err = cons.newMessageStream();
err.setColor(display.getSystemColor(SWT.COLOR_RED));
// Display the console.
// Obtain the active page. See: http://wiki.eclipse.org/FAQ_How_do_I_find_the_active_workbench_page%3F
IWorkbenchPage page = ...;
String id = IConsoleConstants.ID_CONSOLE_VIEW;
IConsoleView view = (IConsoleView) page.showView(id);
view.display(cons);
Then set the input and output streams of my tool and start processing in a different thread so the UI will not block.
// Create my tool and redirect its output
final MyTool myTool = new MyTool();
myTool.setOutputStream(out);
myTool.setErrorStream(err);
myTool.setInputStream(in);
// Start it in another thread
Thread t = new Thread(new Runnable() {
public void run() {
myTool.startExecuting();
}
});
t.start();
If your tool does not support I/O redirection, you have no choice but to start it in another process with the ProcessBuilder and use a number of threads to move data between console and process streams See: Process.getInputStream(), Process.getOutputStream() and Process.getErrorStream().
The following links have additional useful details:
Executing a Java application in a separate process
FAQ How do I write to the console from a plug-in?
FAQ How do I find the active workbench page?
This is the code for running a new console with controls, like stop delete, and deleteAll! This is what I asked for in the beginning, but the message console is good to know!
ILaunchConfigurationType launchType = DebugPlugin.getDefault().getLaunchManager().getLaunchConfigurationType("org.eclipse.jdt.launching.localJavaApplication");
ILaunchConfigurationWorkingCopy config = null;
try {
config = launchType.newInstance(null, "My Plugin working");
} catch (CoreException e) {
System.err.println(e.getMessage());
}
config.setAttribute(ILaunchConfiguration.ATTR_SOURCE_LOCATOR_ID, "org.eclipse.jdt.launching.sourceLocator.JavaSourceLookupDirector");
String[] classpath = new String[] { "C:\\Users\\Administrator\\Documents\\myjr.jar" };
ArrayList classpathMementos = new ArrayList();
for (int i = 0; i < classpath.length; i++) {
IRuntimeClasspathEntry cpEntry = JavaRuntime.newArchiveRuntimeClasspathEntry(new Path(classpath[i]));
cpEntry.setClasspathProperty(IRuntimeClasspathEntry.USER_CLASSES);
try {
classpathMementos.add(cpEntry.getMemento());
} catch (CoreException e) {
System.err.println(e.getMessage());
}
}
config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_DEFAULT_CLASSPATH, false);
config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_CLASSPATH, classpathMementos);
config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, "collectorlog.handlers.MyClass");
try {
ILAUNCH = config.launch(ILaunchManager.RUN_MODE, null);
} catch (CoreException e) {
System.err.println(e.getMessage());
}