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• Very Urgent :How to start a new session if a user click on the new tab in IE or mozilla on websphere

  - by ha22109

  Hi, I have one "user search" portlet on the home page of one application running on websphere portal server.Which display the matching user records as per the search criteria filled in the search form.I have requirement to have a "back to search input" link on the results page which onclick should show the filled form on the input jsp. The issue which i am facing is if i open the application in two diff tab of same IE browser and start giving some search criteria and submit and same time search for some other input from other IE tab (in the same browser)and then go back to previous tab and click on "back to search input" link then instead of showing me the first input it will show me the imput which i entered in the next IE tab. I am setting and getting the bean(form bean) through portlet session.but in the two diff tab of same IE it will be the sae user session (and may be the same portlet session..) Please tell me solution for this. The one thing to be notice here is i can access this "user search" application even without doing login also.so it must be taking the default portlet session in this case. what wil happen once i login and then search,will it going to overwrite the portlet session and http session or howz is that?

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• Is it possible to use a serial port like session in c#?

  - by Pandiya Chendur

  I am using serial port communication in my asp.net webform application... private bool sendSMS(int portNo, string mobNo, string details) { try { SerialPort SerialPort1 = new SerialPort(); SerialPort1.PortName = "COM" + portNo.ToString(); SerialPort1.BaudRate = 9600; SerialPort1.Parity = Parity.None; SerialPort1.DataBits = 8; SerialPort1.StopBits = StopBits.One; SerialPort1.RtsEnable = true; SerialPort1.DtrEnable = true; SerialPort1.Encoding.GetEncoder(); SerialPort1.ReceivedBytesThreshold = 1; SerialPort1.NewLine = Environment.NewLine; SerialPort1.Open(); SerialPort1.Write("AT" + SerialPort1.NewLine); Sleep(500); SerialPort1.Write("AT+CMGF=1" + SerialPort1.NewLine); Sleep(500); SerialPort1.Write("AT+CMGS=" + (char)34 + mobNo + (char)34 + SerialPort1.NewLine); Sleep(1000); SerialPort1.Write(details + (char)26); Sleep(2000); SerialPort1.Close(); } catch { } return true; } This method works when i send i single message... But when want to send sms in bulk opening and closing port everytime is not a good idea... So my question is it possible to use a serial port like session in c#?... When i open a port i want it to be open for 1 hour and then if my time expires i want to close the port and open it the next time... Any suggestion...

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• Optimize SQL connection?

  - by user1484035

  I am building a multi-page web project in HTML and Javascript that is constantly reading from AND writing to an SQL database. I can connect to the database and successfully run my project with this type of connection. var connection = new ActiveXObject("ADODB.Connection") ; var connectionstring="Data Source=<server>;Initial Catalog=<catalog>;User ID=<user>; Password=<password>;Provider=SQLOLEDB"; connection.Open(connectionstring); var rs = new ActiveXObject("ADODB.Recordset"); rs.Open("SELECT * FROM table", connection); rs.MoveFirst while(!rs.eof) { document.write(rs.fields(1)); rs.movenext; } rs.close; connection.close; Works great and runs fine. BUT, the first 5 lines (from var connection = to var rs =) causes the whole browser to freeze for a few seconds while it establishes the connection. I need to speed that up since I am constantly connecting to the database throughout my project. Is there a more effective way of connecting to a SQL database? or is my computer just bad and this should run faster?

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• Image.Save(..) throws a GDI+ exception because the memory stream is closed.

  - by Pure.Krome

  Hi folks, i've got some binary data which i want to save as an image. When i try to save the image, it throws an exception if the memory stream used to create the image, was closed before the save. The reason i do this is because i'm dynamically creating images and as such .. i need to use a memory stream. this is the code: [TestMethod] public void TestMethod1() { // Grab the binary data. byte[] data = File.ReadAllBytes("Chick.jpg"); // Read in the data but do not close, before using the stream. Stream originalBinaryDataStream = new MemoryStream(data); Bitmap image = new Bitmap(originalBinaryDataStream); image.Save(@"c:\test.jpg"); originalBinaryDataStream.Dispose(); // Now lets use a nice dispose, etc... Bitmap2 image2; using (Stream originalBinaryDataStream2 = new MemoryStream(data)) { image2 = new Bitmap(originalBinaryDataStream2); } image2.Save(@"C:\temp\pewpew.jpg"); // This throws the GDI+ exception. } Does anyone have any suggestions to how i could save an image with the stream closed? I cannot rely on the developers to remember to close the stream after the image is saved. In fact, the developer would have NO IDEA that the image was generated using a memory stream (because it happens in some other code, elsewhere). I'm really confused :(

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• getting windows username with javascript

  - by jbkkd

  I have a site which is built in ASP.net and C#. Let's call it webapp. it uses a Form system to log on into it, and cannot be changed easliy. I got a request to change the log in to some kind of windows authentication. I'll explain. Our windows login uses active directory for users to log into their windows account. their login name is sXXXXXXX. X are numbers. in my webapp, I want to take the users numbers from their active directory login, and check if those exist in the webapp database. if it exists, they will automatically log in. If it doesn't, they will be referred to the regular login page for the webapp system which is currently in use. I tried changing my IIS to disable anonymous login and enabling windows authentication, therefore making the user browser to send it's current logged in user name to my webapp. I changed the web config as well from "Forms" to "Windows", which made my whole webapp obsolete as the whole forms system did not work. My question is this - is there a different way for the browser only to send the username to my webapp? I thought maybe javascript, I just don't know how to implement that, if it's even possible. I know it's not very secure, but all this platform and system is built outside the internet, it's on a private network.

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• session timeout prompt asp.net

  - by renathy

  The application I am using is implementing some session timeout prompt using jquery. There is a timer that counts and if there is no user activity after predefined X minutes it shows user prompt (Your session will end soon... Continue or Logout). It uses the approach found here - http://www.codeproject.com/Articles/227382/Alert-Session-Time-out-in-ASP-Net. However, this doesn't work if user opens new tab: 1) User logs in, timer starts counting user inactivity's. 2) User clicks some link that opens in new window (for example, in our case it is a long report running). Second tab is active, there is some response (crossbacks / postbacks that doesn't end session). 3) Second browser tab is active, there is some activity that doesn't end session. 4) However, first browser tab is inactive and counter is "thinking" that session should be closed, it displays appropriate message and then logout user. This is not what we want. So the given approach is just some session timeout fix, but if user is active in another tab, then application will logout user anyway. That is not the desired thing. We have a Report Page. It functions so that it opens report in a new tab/window. And it could be run quite long. Report section take care of some callbacks, so session wont end in this tab. However, it would end in the second tab.

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• Java File Handling, what did I do wrong?

  - by Urda

  Wrote up a basic file handler for a Java Homework assignment, and when I got the assignment back I had some notes about failing to catch a few instances: Buffer from file could have been null. File was not found File stream wasn't closed Here is the block of code that is used for opening a file: /** * Create a Filestream, Buffer, and a String to store the Buffer. */ FileInputStream fin = null; BufferedReader buffRead = null; String loadedString = null; /** Try to open the file from user input */ try { fin = new FileInputStream(programPath + fileToParse); buffRead = new BufferedReader(new InputStreamReader(fin)); loadedString = buffRead.readLine(); fin.close(); } /** Catch the error if we can't open the file */ catch(IOException e) { System.err.println("CRITICAL: Unable to open text file!"); System.err.println("Exiting!"); System.exit(-1); } The one comment I had from him was that fin.close(); needed to be in a finally block, which I did not have at all. But I thought that the way I have created the try/catch it would have prevented an issue with the file not opening. Let me be clear on a few things: This is not for a current assignment (not trying to get someone to do my own work), I have already created my project and have been graded on it. I did not fully understand my Professor's reasoning myself. Finally, I do not have a lot of Java experience, so I was a little confused why my catch wasn't good enough.

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• get_browser not working

  - by tazphoenix

  it's not working.i mean i have many scripts to get ip and os but anyway get_browser is internal function and should work but its not.when i try to get a print_r on the function i get. Array ( [browser_name_regex] => §^.*$§ [browser_name_pattern] => * [browser] => Default Browser [version] => 0 [majorver] => 0 [minorver] => 0 [platform] => unknown [alpha] => [beta] => [win16] => [win32] => [win64] => [frames] => 1 [iframes] => [tables] => 1 [cookies] => [backgroundsounds] => [cdf] => [vbscript] => [javaapplets] => [javascript] => [activexcontrols] => [isbanned] => [ismobiledevice] => [issyndicationreader] => [crawler] => [cssversion] => 0 [supportscss] => [aol] => [aolversion] => 0 ) I'm using win7 and firefox.

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• Reordering columns (fields) in a ADO Recordset

  - by Sukotto

  I have a classic asp webpage written in vbscript that outputs the results from a third-party stored procedure. My user wants the page to display the columns of data in a different order than they come in from the database. Is there an easy and safe way to re-order the columns in an ADO recordset? I did not write this page and cannot change the SP. What is the minimum change I can make here to get the job done and not risk screwing up all the other stuff in the page? The code looks something like dim Conn, strSQL, RS Set Conn = Server.CreateObject("ADODB.Connection") Conn.Open ServerName Set strSQL = "EXEC storedProc @foo = " & Request("fooParam") 'This stored procedure returns a date column, an arbitrary ' ' number of data columns, and two summation columns. We ' ' want the two summation columns to move so they appear ' ' immediately after the data column ' Set RS = Server.CreateObject("ADODB.RecordSet") RS.ActiveConnection = Nothing RS.CursorLocation = adUseClient RS.CursorType = adOpenStatic RS.LockType = adLockBatchOptimistic RS.Open strSQL, Conn, adOpenDynamic, adLockOptimistic dim A ' ----- ' ' Insert some code here to move the columns of the RS around ' ' to suit the whim of my user ' ' ----- ' ' Several blocks of code that iterate over the RS and display it various ways ' RS.MoveFirst For A = 0 To RS.Fields.Count -1 ' do stuff ' Next ... RS.MoveFirst For A = 0 To RS.Fields.Count -1 ' do more stuff ' Next RS.Close : Set RS = Nothing Conn.Close : Set Conn = Nothing

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• Please help me optimize my Python code

  - by Haidon

  Beginner here! Forgive me in advance for raising what is probably an incredibly simple problem. I've been trying to put together a Python script that runs multiple find-and-replace actions and a few similar things on a specified plain-text file. It works, but from a programming perspective I doubt it works well. How would I best go about optimizing the actions made upon the 'outtext' variable? At the moment it's basically doing a very similar thing four times over... import binascii import re import struct import sys infile = sys.argv[1] charenc = sys.argv[2] outFile=infile+'.tex' findreplace = [ ('TERM1', 'TERM2'), ('TERM3', 'TERM4'), ('TERM5', 'TERM6'), ] inF = open(infile,'rb') s=unicode(inF.read(),charenc) inF.close() # THIS IS VERY MESSY. for couple in findreplace: outtext=s.replace(couple[0],couple[1]) s=outtext for couple in findreplace: outtext=re.compile('Title: (.*)', re.I).sub(r'\\title'+ r'{\1}', s) s=outtext for couple in findreplace: outtext=re.compile('Author: (.*)', re.I).sub(r'\\author'+ r'{\1}', s) s=outtext for couple in findreplace: outtext=re.compile('Date: (.*)', re.I).sub(r'\\date'+ r'{\1}', s) s=outtext # END MESSY SECTION. outF = open(outFile,'wb') outF.write(outtext.encode('utf-8')) outF.close()

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• Stop lazy-loading images?

  - by Greg

  Here's the issue – I followed along with the Apple lazy-load image sample code to handle my graphical tables. It works great. However, my lazy-load image tables are being stacked within a navigation controller so that you can move in and out of menus. While all this works, I'm getting a persistent crash when I move into a table then move immediately back out of it using the "back" button. This appears to be a result of the network connections loading content not being closed properly, or calling back to their released delegates. Now, I've tried working through this and carefully setting all delegates to nil and calling close on all open network connections before releasing a menu. However, I'm still getting the error. Also – short posting my entire application code into this post, I can't really post a specific code snippet that illustrates this situation. I wonder if anyone has ideas for tasks that I may be missing? Do I need to do anything to close a network connection other than closing it and setting it to nil? Also, I'm new to debugging tools – can anyone suggest a good tool to use to watch network connections and see what's causing them to fail? Thanks!

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• Need a design approach or suggestion for a simple structure using Servlet.

  - by akshay

  Hi I have to design such that whenever user pass a query I process it using servlet and then call the js page to draw the chart 1 user writes a query on a page 2 the page call the servelt class public class MyServlet extends Httpservlet implements DataSourceServlet {..... return data The user see a beautiful string like this.. google.visualization.Query.setResponse......... /Tiger'},{v:80.0}, {v:false}]}]}}); 3 when the user hits on different html page myhtml.js it draws the chart. I want the Myservlet class itself call the myhtml.js page and draw the chart directly. and want to eliminate the beautiful string google.visualization.Query.setResponse......... /Tiger'},{v:80.0}, {v:false}]}]}}); from coming on user's browser What should i do? I tried using functions to call another page like request dispatcher(), redirect() calling myhtml.js page directly after myservlet process the query results. But i get the result like this google.visualization.Query.setResponse......... /Tiger'},{v:80.0}, {v:false}]}]}}); and the entire myhtml.js code page below it on the browsers that to without the chart been draw. Is there anyway to element the beautiful string from coming on clients browser and only show them the chart been drawn ? :) This is the small tutorial i am following http://code.google.com/apis/visualization/documentation/dev/dsl_get_started.html

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• How to view my Android app created database, via my android app?

  - by suufang

  I'm creating an application that collects users location (Cell broadcast location code) and saves that location with a name of users option, for example say my CB location code is 546034, now my app allows me to store that location code with a name of my choice say 'Home'. So, essentially my app has that following modules, To collect users CB location. To collect a custom name from user of that location. To store these values in a database. I've succeeded in doing all the above modules. I have a sub-module for my third module which has an option for user, of showing and deleting the database values, the screen shot looks as follows, Now, Users should be able to view and delete entries when he chooses the option 'View my database of locations' I've learned how to query my database values and I'm stuck with creating a list view and providing the delete option. My code for getting the database values and querying values goes as follows, submit.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { String locname = name.getText().toString(); if(locname.length()==0) { Toast.makeText(getBaseContext(), "Please enter the location name, for example 'Home'.", Toast.LENGTH_LONG).show(); } else { SQLiteDatabase cd = openOrCreateDatabase("mydata", MODE_WORLD_READABLE, null); cd.execSQL("CREATE TABLE IF NOT EXISTS MLITable (CblocationCode INT(10), CblocationName VARCHAR);"); cd.execSQL("INSERT INTO MLITable VALUES ('"+str+ "','"+locname+ "');"); cd.close(); Toast.makeText(getBaseContext(), "value successfully entered.", Toast.LENGTH_LONG).show(); } } }); viewdb.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { // here comes the code for viewing the database and deleting SQLiteDatabase db = openOrCreateDatabase("mydata", MODE_WORLD_READABLE, null); Cursor c = db.rawQuery("SELECT * FROM MLITble", null); db.close(); } }); I can see that I've read the table values, but I'm not able to create a display for those values. Help required. Thank you.

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• Variable not accessible within and if statment

  - by Chris

  I have a variable which holds a score for a game. My variable is accessible and correct outside of an if statement but not inside as shown below cout << score << endl; //works if(!justFinished){ cout << score << endl; // doesn't work prints a large negative number endTime = time(NULL); ifstream highscoreFile; highscoreFile.open("highscores.txt"); if(highscoreFile.good()){ highscoreFile.close(); }else{ std::ofstream outfile ("highscores.txt"); cout << score << endl; outfile << score << std::endl; outfile.close(); } justFinished = true; } cout << score << endl;//works

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• Page Entirely Blank Despite Having Source Code! (TinyMCE, FireFox)

  - by Chris Cooper

  Alright guys, here's a tough one... In reference to this page. The page will seemingly randomly not display the output of server when using Firefox (version 3.5). I have not seen this problem occur in Safari or IE. The best way to have the problem occur is just reload the page about 10 times and it ought to have happened by then, and once it does - it'll continue on subsequent refreshes until you change the page. The problem is literally the browser not displaying the output (code). Viewing the source shows all the appropriate code yet the browser displays a blank white page. The web developer and firebug plugins don't show any errors that would indicate the problem. I have tested this on a separate system and OS and it occurs in Firefox on that system as well. The problem did not occur until after TinyMCE (A Rich Text Editor JavaScript library for textareas) was added to the project. TinyMCE works however, where it should. I know this is a confusing problem, but I am completely lost as to what could be causing this significant issue. Thanks in advance. EDIT: If it's any help... I've noticed that if I cause a css file error by changing a stylesheet source to something non-existant (xxx.css), the page will continuously display without a problem (besides whatever related css not showing due to the src change). I've also noticed that causing any simple javascript error with some bad code will cause the page to load properly continuously (besides of course javascript not running on the page). EDIT#2: Moving all <script> tags down at the tail of the <body> 'fixes' (well, hides) this error and the page shows normally. A band-aid.

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• How do I make a lock that allows only ONE thread to read from the resource ?

  - by mare

  I have a file that holds an integer ID value. Currently reading the file is protected with ReaderWriterLockSlim as such: public int GetId() { _fileLock.EnterUpgradeableReadLock(); int id = 0; try { if(!File.Exists(_filePath)) CreateIdentityFile(); FileStream readStream = new FileStream(_filePath, FileMode.Open, FileAccess.Read); StreamReader sr = new StreamReader(readStream); string line = sr.ReadLine(); sr.Close(); readStream.Close(); id = int.Parse(line); return int.Parse(line); } finally { SaveNextId(id); // increment the id _fileLock.ExitUpgradeableReadLock(); } } The problem is that subsequent actions after GetId() might fail. As you can see the GetId() method increments the ID every single time, disregarding what happens after it has issued an ID. The issued ID might be left hanging (as said, exceptions might occur). As the ID is incremented, some IDs might be left unused. So I was thinking of moving the SaveNextId(id) out, remove it (the SaveNextId() actually uses the lock too, except that it's EnterWriteLock). And call it manually from outside after all the required methods have executed. That brings out another problem - multiple threads might enter the GetId() method before the SaveNextId() gets executed and they might all receive the same ID. I don't want any solutions where I have to alter the IDs after the operation, correcting them in any way because that's not nice and might lead to more problems. I need a solution where I can somehow callback into the FileIdentityManager (that's the class that handles these IDs) and let the manager know that it can perform the saving of the next ID and then release the read lock on the file containing the ID. Essentialy I want to replicate the relational databases autoincrement behaviour - if anything goes wrong during row insertion, the ID is not used, it is still available for use but it also never happens that the same ID is issued. Hopefully the question is understandable enough for you to provide some solutions..

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• I have a slight confusion with setting up Mercurial on my webserver...

  - by littlejim84

  I'm starting to use Mercurial on my web server (in this case MediaTemple's Grid). I've used SVN previously, though I'm not an expert of version control systems. I'm just needing a little help with clearing up some confusion with getting it set up optimally. I have a 'data' folder which is outside the web server root and that the browser cannot access. It was recommended to me before to have my Mercurial repositories setup here, then I would clone from here locally on my computer. I would also have a 'domains' folder that is basically the web server root and inside there is my actual domains where my websites are actually served to the browser - these would need to be updated from the 'data' repositories too. But with this in mind, after setting it up, it seems inefficient... I'm cloning to my local (that makes sense), adding, committing, pushing. That's fine... But then I'm then updating in my data repository folder and then updating in my domains folder to actually update my websites. Surely, I don't actually need this 'data' folder for repositories? Wouldn't my actual live 'domains' folders be the main repositories themselves? So I'm cloning locally and updating from these? Please help me clear some confusions with all this (if you can).

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• PHP session_write_close() keeps sending a set-cookie header

  - by Chiraag Mundhe

  In my framework, I make a number of calls to session_write_close(). Let's assume that a session has been initiated with a user agent. The following code... foreach($i = 0; $i < 3; $i++) { session_start(); session_write_close(); } ...will send the following request header to the browser: Set-Cookie PHPSESSID=bv4d0n31vj2otb8mjtr59ln322; path=/ PHPSESSID=bv4d0n31vj2otb8mjtr59ln322; path=/ There should be no Set-Cookie header because, as I stipulated, the session cookie has already been created on the user's end. But every call to session_write_close() after the first one in the script above will result in PHP instructing the browser to set the current session again. This is not breaking my app or anything, but it is annoying. Does anyone have any insight into preventing PHP from re-setting the cookie with each subsequent call to session_write_close? EDIT The problem seems to be that with every subsequent call to session_start(), PHP re-sets the session cookie to its own SID and sends a Set-Cookie response header. But why??

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• How to make checkboxes have the same submit behavior as other inputs?

  - by Tim Santeford

  I have a search form where several checkboxes are checked by default. When the form submits, as a GET, the url will only contain the list of checkboxes that were left checked. http://www.example.com/page/?checkbox1=yes&checkbox2=yes It is difficult with this scenario to determine the difference between when a user first arrives at this search page and when they submit the form with all checkboxes unchecked because the querystrings look the same. To combat this problem I have started injecting a hidden field before the checkbox with the same name and a 'no' value. When the checkbox is unchecked the browser will send the hidden field's no value and when the checkbox is set then the browser is overriding the hidden field with the checkbox's 'yes' value. <input type="hidden" name="checkbox1" value="no" /> <input type="checkbox" name="checkbox1" value="yes" /> when the user submits the form with all checkboxes unchecked I get this querystring: http://www.example.com/page/?checkbox1=no&checkbox2=no This seems to work on ff, chrome, ie5.5+ so I'am I safe in using this method or is there a better way to make checkboxes submit like inputs and selects?

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• How to pass XML from C# to a stored procedure in SQL Server 2008?

  - by Geetha

  I want to pass xml document to sql server stored procedure such as this: CREATE PROCEDURE BookDetails_Insert (@xml xml) I want compare some field data with other table data and if it is matching that records has to inserted in to the table. Requirements: How do I pass XML to the stored procedure? I tried this, but it doesn’t work:[Working] command.Parameters.Add( new SqlParameter("@xml", SqlDbType.Xml) { Value = new SqlXml(new XmlTextReader(xmlToSave.InnerXml, XmlNodeType.Document, null)) }); How do I access the XML data within the stored procedure? Edit: [Working] String sql = "BookDetails_Insert"; XmlDocument xmlToSave = new XmlDocument(); xmlToSave.Load("C:\\Documents and Settings\\Desktop\\XML_Report\\Books_1.xml"); SqlConnection sqlCon = new SqlConnection("..."); using (DbCommand command = sqlCon.CreateCommand()) { **command.CommandType = CommandType.StoredProcedure;** command.CommandText = sql; command.Parameters.Add( new SqlParameter("@xml", SqlDbType.Xml) { Value = new SqlXml(new XmlTextReader(xmlToSave.InnerXml , XmlNodeType.Document, null)) }); sqlCon.Open(); DbTransaction trans = sqlCon.BeginTransaction(); command.Transaction = trans; try { command.ExecuteNonQuery(); trans.Commit(); sqlCon.Close(); } catch (Exception) { trans.Rollback(); sqlCon.Close(); throw; } Edit 2: How to create a select query to select pages, description based on some conditions. <booksdetail> <isn_13>700001048</isbn_13> <isn_10>01048B</isbn_10> <Image_URL>http://www.landt.com/Books/large/00/7010000048.jpg</Image_URL> <title>QUICK AND FLUPKE</title> <Description> PRANKS AND JOKES QUICK AND FLUPKE </Description> </booksdetail>

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• How can I hide this overlay element intelligently?

  - by inkedmn

  The site I'm working on has a collection of navigation elements across the top ("Products", "Company", etc.). When you mouse over the Products link, an overlay appears that shows a list of products with links to each. There's a small link at the top of the container that, when clicked, closes the container. All of this works as advertised. The client has asked that, once a user's mouse pointer is a sufficient distance from the overlay element, the overlay element would close (without them having to click the 'close' link). This element appears on multiple pages that have disparate content, so I'm afraid it won't be as simple as adding a mouseover listener to another single element within the page and have it work everywhere. My question, I suppose, is this: is there a relatively easy way to know when the mouse cursor is x pixels away from this container and trigger an event when this occurs? My other thought is that I could just find several elements on the page that fit this criteria and add mouseover listeners to each, but I'm assuming there's a more elegant way of handling this. Thanks in advance - and please let me know if more detail is needed.

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• Is a web-server (e.g servlets) a good solution for an IM server?

  - by John

  I'm looking at a new app, broadly speaking an IM application with a strong client-server model - all communications go through a server so they can be logged centrally. The server will be Java in some form, clients could at this point be anything from a .NET Desktop app to Flex/Silverlight, to a simple web-interface using JS/AJAX. I had anticipated doing the server using standard J2EE so I get a thread-safe, multi-user server for 'free'... to make things simple let's say using Servlets (but in practice SpringMVC would be likely). This all seemed very neat but I'm concerned if the stateless nature of Servlets is the best approach. If my memory of servlets (been a year or two) is right, each time a client sent a HTTP request, typically a new message entered by the user, the servlet could not assume it had the user/chat in memory and might have to get it from the DB... regardless it has to look it up. Then it either has to use some PUSH system to inform other members of the chat, or cache that there are new messages, for other clients who poll the server using AJAX or similar - and when they poll it again has to lookup the chat, including new messages, and send the new data. I'm wondering if a better system would be the server is running core Java, and implements a socket-based communication with clients. This allows much more immediate data transfer and is more flexible if say the IM client included some game you could play. But then you're writing a custom server and sockets don't sound very friendly to a browser-based client on current browsers. Am I missing some big piece of the puzzle here, it kind of feels like I am? Perhaps a better way to ask the question would simply be "if the client was browser-based using HTML/JS and had to run on IE7+,FF2+ (i.e no HTML5), how would you implement the server?" edit: if you are going to suggest using XMPP, I have been trying to get my head around this in another question, so please consider if that's a more appropriate place to discuss this specifically.

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• speed up sql INSERTs

  - by sean717

  I have the following method to insert millions of rows of data into a table (I use SQL 2008) and it seems slow, is there any way to speed up INSERTs? Here is the code snippet - I use MS enterprise library public void InsertHistoricData(List<DataRow> dataRowList) { string sql = string.Format( @"INSERT INTO [MyTable] ([Date],[Open],[High],[Low],[Close],[Volumn]) VALUES( @DateVal, @OpenVal, @High, @Low, @CloseVal, @Volumn )"); DbCommand dbCommand = VictoriaDB.GetSqlStringCommand( sql ); DB.AddInParameter(dbCommand, "DateVal", DbType.Date); DB.AddInParameter(dbCommand, "OpenVal", DbType.Currency); DB.AddInParameter(dbCommand, "High", DbType.Currency ); DB.AddInParameter(dbCommand, "Low", DbType.Currency); DB.AddInParameter(dbCommand, "CloseVal", DbType.Currency); DB.AddInParameter(dbCommand, "Volumn", DbType.Int32); foreach (NasdaqHistoricDataRow dataRow in dataRowList) { DB.SetParameterValue( dbCommand, "DateVal", dataRow.Date ); DB.SetParameterValue( dbCommand, "OpenVal", dataRow.Open ); DB.SetParameterValue( dbCommand, "High", dataRow.High ); DB.SetParameterValue( dbCommand, "Low", dataRow.Low ); DB.SetParameterValue( dbCommand, "CloseVal", dataRow.Close ); DB.SetParameterValue( dbCommand, "Volumn", dataRow.Volumn ); DB.ExecuteNonQuery( dbCommand ); } }

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• Need to have JProgress bar to measure progress when copying directories and files

  - by user1815823

  I have the below code to copy directories and files but not sure where to measure the progress. Can someone help as to where can I measure how much has been copied and show it in the JProgress bar public static void copy(File src, File dest) throws IOException{ if(src.isDirectory()){ if(!dest.exists()){ //checking whether destination directory exisits dest.mkdir(); System.out.println("Directory copied from " + src + " to " + dest); } String files[] = src.list(); for (String file : files) { File srcFile = new File(src, file); File destFile = new File(dest, file); copyFolder(srcFile,destFile); } }else{ InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest); byte[] buffer = new byte[1024]; int length; while ((length = in.read(buffer)) > 0){ out.write(buffer, 0, length); } in.close(); out.close(); System.out.println("File copied from " + src + " to " + dest); }

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• possible to make codeigniter work with another framework?

  - by ajsie

  the situation is this. my client (who also is a programmer) asks me to develop an address book (with mysql database) with a lot of functions. then he can interact with some class methods i provide for him. kinda like an API. the situation is that the address book application is getting bigger and bigger, and i feel like its way better to use CodeIgniter to code it with MVC. i wonder if i can use codeigniter, then in some way give him the access to controller methods. eg. in a controller there are some functions u can call with the web browser. public function create_contact($information) {..} public function delete_contact($id) {..} public function get_contact($id) {..} however, these are just callable from web browser. how can i let my client have access to these functions like an API? then in his own application he can use: $result = $address_book-create_contact($information); if($result) { echo "Success"; } $contact = $address_book-get_contact($id); is this possible? cause i just know how to access the controller methods with the webbrowser. and i guess its not an option for him to use header(location) to access them. all suggestions to make this possible are welcomed! thanks

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