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• error CS0177: The out parameter 'Wx' must be assigned to before control leaves the current method

  - by sonny5

  using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class Form1 : System.Windows.Forms.Form { public static float WXmin; public static float WYmin; public static float WXmax; public static float WYmax; public static int VXmin; public static int VYmin; public static int VXmax; public static int VYmax; public static float Vx; public static float Vy; public Form1() { InitializeComponent(); } private void InitializeComponent() { //this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(400, 300); this.Text="Pass Args"; this.Paint += new System.Windows.Forms.PaintEventHandler(this.doLine); } static void Main() { Application.Run(new Form1()); } private void doLine(object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g = e.Graphics; g.FillRectangle(Brushes.White, this.ClientRectangle); Pen p = new Pen(Color.Black); g.DrawLine(p, 0, 0, 100, 100); p.Dispose(); } private void eachCornerPix (object sender, PaintEventArgs e, out float Wx, out float Wy, out float Vx, out float Vy) { Graphics g = this.CreateGraphics(); Pen penBlu = new Pen(Color.Blue, 2); SolidBrush redBrush = new SolidBrush(Color.Red); int width = 2; // 1 pixel wide in x int height = 2; float [] Wxc = {0.100f, 5.900f, 5.900f, 0.100f}; float [] Wyc = {0.100f, 0.100f, 3.900f, 3.900f}; for (int i = 0; i<3; i++) { Wx = Wxc[i]; Wy = Wyc[i]; Vx = ((Wx - WXmin)*((VXmax-VXmin)+VXmin)/(WXmax-WXmin)); Vy = ((Wy - WYmin)*(VYmax-VYmin)/(WYmax-WYmin)+VYmin); Console.WriteLine("eachCornerPix Vx= {0}", Vx); Console.WriteLine("eachCornerPix Vy= {0}", Vy); g.FillRectangle(redBrush, Vx, Vy, width, height); g.Dispose(); } // Desired effect: Use the array values (Wxc, Wyc) and re-assign them to Wx and Wy. Then use // Wx and Wy as components to calculate Vx and Vy. // My end goal...once compile issues are resolved, is to pass each array value listed // using this method. This should allow 4 xy point pairs to be plotted. // Errors: // pass1.cs(51,18): error CS0177: The out parameter 'Wx' must be assigned to before // control leaves the current method // pass1.cs(51,18): error CS0177: The out parameter 'Wy' must be assigned to before // control leaves the current method // pass1.cs(51,18): error CS0177: The out parameter 'Vx' must be assigned to before // control leaves the current method // pass1.cs(51,18): error CS0177: The out parameter 'Vy' must be assigned to before // control leaves the current method } }

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• Facing Null Pointer Exception while using BIRT

  - by srikanth

  Hi, I am using BIRT APIs in a java program.My code is : package com.tecnotree.mdx.product.utils; import java.util.HashMap; import java.util.logging.Level; import org.eclipse.birt.core.exception.BirtException; import org.eclipse.birt.core.framework.Platform; import org.eclipse.birt.report.engine.api.EngineConfig; import org.eclipse.birt.report.engine.api.EngineConstants; import org.eclipse.birt.report.engine.api.HTMLRenderOption; import org.eclipse.birt.report.engine.api.IReportEngine; import org.eclipse.birt.report.engine.api.IReportEngineFactory; import org.eclipse.birt.report.engine.api.IReportRunnable; import org.eclipse.birt.report.engine.api.IRunAndRenderTask; import org.eclipse.birt.report.engine.api.ReportEngine; public class ExampleReport { public static void main(String[] args) { // Variables used to control BIRT Engine instance ReportEngine eng = null; IReportRunnable design = null; IRunAndRenderTask task = null; HTMLRenderOption renderContext = null; HashMap contextMap = null; HTMLRenderOption options = null; final EngineConfig conf = new EngineConfig(); conf .setEngineHome("C:\\birt-runtime-2_5_2\\birt-runtime-2_5_2\\ReportEngine"); System.out.println("conf " + conf.getBIRTHome()); conf.setLogConfig(null, Level.FINE); try { Platform.startup(conf); } catch (BirtException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } IReportEngineFactory factory = (IReportEngineFactory) Platform .createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY); System.out.println("Factory : " + factory.toString()); System.out.println(conf.toString()); IReportEngine engine = factory.createReportEngine(conf); System.out.println("Engine : " + engine); try { design = eng .openReportDesign("C:\\birt-runtime-2_5_2\\birt-runtime-2_5_2\\ReportEngine\\samples\\hello_world.rptdesign"); } catch (Exception e) { System.err .println("An error occured during the opening of the report file!"); e.printStackTrace(); System.exit(-1); } task = eng.createRunAndRenderTask(design); renderContext = new HTMLRenderOption(); renderContext.setImageDirectory("image"); contextMap = new HashMap(); contextMap.put(EngineConstants.APPCONTEXT_HTML_RENDER_CONTEXT, renderContext); task.setAppContext(contextMap); options = new HTMLRenderOption(); options.setOutputFileName("c:/temp/output.html"); options.setOutputFormat("html"); task.setRenderOption(options); try { task.run(); } catch (Exception e) { System.err.println("An error occured while running the report!"); e.printStackTrace(); System.exit(-1); } System.out.println("All went well. Closing program!"); eng.destroy(); } } But i am facing NullPointerException while creating the report. STACKTRACE : Exception in thread "main" java.lang.NullPointerException at org.eclipse.birt.report.engine.api.impl.ReportEngine$EngineExtensionManager.<init>(ReportEngine.java:784) at org.eclipse.birt.report.engine.api.impl.ReportEngine.<init>(ReportEngine.java:109) at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:18) at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory$1.run(ReportEngineFactory.java:1) at java.security.AccessController.doPrivileged(Native Method) at org.eclipse.birt.report.engine.api.impl.ReportEngineFactory.createReportEngine(ReportEngineFactory.java:14) at com.tecnotree.mdx.product.utils.ExampleReport.main(ExampleReport.java:47) Please help me regarding this... my project deadline has been reached... Appreciate your Reply Thanks in Advance

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• LinkedIn API returns 'Unauthorized' response (PHP OAuth)

  - by Jim Greenleaf

  I've been struggling with this one for a few days now. I've got a test app set up to connect to LinkedIn via OAuth. I want to be able to update a user's status, but at the moment I'm unable to interact with LinkedIn's API at all. I am able to successfully get a requestToken, then an accessToken, but when I issue a request to the API, I see an 'unauthorized' error that looks something like this: object(OAuthException)#2 (8) { ["message:protected"]=> string(73) "Invalid auth/bad request (got a 401, expected HTTP/1.1 20X or a redirect)" ["string:private"]=> string(0) "" ["code:protected"]=> int(401) ["file:protected"]=> string(47) "/home/pmfeorg/public_html/dev/test/linkedin.php" ["line:protected"]=> int(48) ["trace:private"]=> array(1) { [0]=> array(6) { ["file"]=> string(47) "/home/pmfeorg/public_html/dev/test/linkedin.php" ["line"]=> int(48) ["function"]=> string(5) "fetch" ["class"]=> string(5) "OAuth" ["type"]=> string(2) "->" ["args"]=> array(2) { [0]=> string(35) "http://api.linkedin.com/v1/people/~" [1]=> string(3) "GET" } } } ["lastResponse"]=> string(358) " 401 1276375790558 0000 [unauthorized]. OAU:Bhgk3fB4cs9t4oatSdv538tD2X68-1OTCBg-KKL3pFBnGgOEhJZhFOf1n9KtHMMy|48032b2d-bc8c-4744-bb84-4eab53578c11|*01|*01:1276375790:xmc3lWhXJvLSUZh4dxMtrf55VVQ= " ["debugInfo"]=> array(5) { ["sbs"]=> string(329) "GET&http%3A%2F%2Fapi.linkedin.com%2Fv1%2Fpeople%2F~&oauth_consumer_key%3DBhgk3fB4cs9t4oatSdv538tD2X68-1OTCBg-KKL3pFBnGgOEhJZhFOf1n9KtHMMy%26oauth_nonce%3D7068001084c13f2ee6a2117.22312548%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1276375790%26oauth_token%3D48032b2d-bc8c-4744-bb84-4eab53578c11%26oauth_version%3D1.0" ["headers_sent"]=> string(401) "GET /v1/people/~?GET&oauth_consumer_key=Bhgk3fB4cs9t4oatSdv538tD2X68-1OTCBg-KKL3pFBnGgOEhJZhFOf1n9KtHMMy&oauth_signature_method=HMAC-SHA1&oauth_nonce=7068001084c13f2ee6a2117.22312548&oauth_timestamp=1276375790&oauth_version=1.0&oauth_token=48032b2d-bc8c-4744-bb84-4eab53578c11&oauth_signature=xmc3lWhXJvLSUZh4dxMtrf55VVQ%3D HTTP/1.1 User-Agent: PECL-OAuth/1.0-dev Host: api.linkedin.com Accept: */*" ["headers_recv"]=> string(148) "HTTP/1.1 401 Unauthorized Server: Apache-Coyote/1.1 Date: Sat, 12 Jun 2010 20:49:50 GMT Content-Type: text/xml;charset=UTF-8 Content-Length: 358" ["body_recv"]=> string(358) " 401 1276375790558 0000 [unauthorized]. OAU:Bhgk3fB4cs9t4oatSdv538tD2X68-1OTCBg-KKL3pFBnGgOEhJZhFOf1n9KtHMMy|48032b2d-bc8c-4744-bb84-4eab53578c11|*01|*01:1276375790:xmc3lWhXJvLSUZh4dxMtrf55VVQ= " ["info"]=> string(216) "About to connect() to api.linkedin.com port 80 (#0) Trying 64.74.98.83... connected Connected to api.linkedin.com (64.74.98.83) port 80 (#0) Connection #0 to host api.linkedin.com left intact Closing connection #0 " } } My code looks like this (based on the FireEagle example from php.net): $req_url = 'https://api.linkedin.com/uas/oauth/requestToken'; $authurl = 'https://www.linkedin.com/uas/oauth/authenticate'; $acc_url = 'https://api.linkedin.com/uas/oauth/accessToken'; $api_url = 'http://api.linkedin.com/v1/people/~'; $callback = 'http://www.pmfe.org/dev/test/linkedin.php'; $conskey = 'Bhgk3fB4cs9t4oatSdv538tD2X68-1OTCBg-KKL3pFBnGgOEhJZhFOf1n9KtHMMy'; $conssec = '####################SECRET KEY#####################'; session_start(); try { $oauth = new OAuth($conskey,$conssec,OAUTH_SIG_METHOD_HMACSHA1,OAUTH_AUTH_TYPE_URI); $oauth->enableDebug(); if(!isset($_GET['oauth_token'])) { $request_token_info = $oauth->getRequestToken($req_url); $_SESSION['secret'] = $request_token_info['oauth_token_secret']; header('Location: '.$authurl.'?oauth_token='.$request_token_info['oauth_token']); exit; } else { $oauth->setToken($_GET['oauth_token'],$_SESSION['secret']); $access_token_info = $oauth->getAccessToken($acc_url); $_SESSION['token'] = $access_token_info['oauth_token']; $_SESSION['secret'] = $access_token_info['oauth_token_secret']; } $oauth->setToken($_SESSION['token'],$_SESSION['secret']); $oauth->fetch($api_url, OAUTH_HTTP_METHOD_GET); $response = $oauth->getLastResponse(); } catch(OAuthException $E) { var_dump($E); } I've successfully set up a connection to Twitter and one to Facebook using OAuth, but LinkedIn keeps eluding me. If anyone could offer some advice or point me in the right direction, I will be extremely appreciative!

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• Small performance test on a web service

  - by vtortola

  Hi, I'm trying to develop a small application that test how many requests per second can my service support but I think I'm doing something wrong. The service is in an early development stage, but I'd like to have this test handy in order to check in time to time I'm not doing something that decrease the performance. The problem is that I cannot get the web server or the database server go to the 100% of CPU. I'm using three different computers, in one is the web server (WinSrv Standard 2008 x64 IIS7), in other the database (Win 2K - SQL Server 2005) and the last is my computer (Win7 x64 ultimate), where I'll run the test. The computers are connected through a 100 ethernet switch. The request POST is 9 bytes and the response will be 842 bytes. The test launches several threads, and each thread has a "while" loop, in each loop it creates a WebRequest object, performs a call, increment a common counter and waits between 1 and 5 millisencods, then it do it again: static Int32 counter = 0; static void Main(string[] args) { ServicePointManager.DefaultConnectionLimit = 250; Console.WriteLine("Ready. Press any key..."); Console.ReadKey(); Console.WriteLine("Running..."); String localhost = "localhost"; String linuxmono = "192.168.1.74"; String server= "192.168.1.5:8080"; DateTime start = DateTime.Now; Random r = new Random(DateTime.Now.Millisecond); for (int i = 0; i < 50; i++) { new Thread(new ParameterizedThreadStart(Test)).Start(server); Thread.Sleep(r.Next(1, 3)); } Thread.Sleep(2000); while (true) { Console.WriteLine("Request per second :" + counter/DateTime.Now.Subtract(start).TotalSeconds ); Thread.Sleep(3000); } } public static void Test(Object ip) { Guid guid = Guid.NewGuid(); Random r = new Random(DateTime.Now.Millisecond); while (true) { String test = "<lalala/>"; WebRequest req = WebRequest.Create("http://" + (String)ip + "/WebApp/"+guid.ToString()+"/Data/Tables=whatever"); req.Method = "POST"; req.ContentType = "application/xml"; req.Credentials = new NetworkCredential("aaa", "aaa","domain"); Byte[] array = Encoding.UTF8.GetBytes(test); req.ContentLength = array.Length; using (Stream reqStream = req.GetRequestStream()) { reqStream.Write(array, 0, array.Length); reqStream.Close(); } using (Stream responseStream = req.GetResponse().GetResponseStream()) { String response = new StreamReader(responseStream).ReadToEnd(); if (response.Length != 842) Console.Write(" EEEE "); } Interlocked.Increment(ref counter); Thread.Sleep(r.Next(1,5)); } } If I run the test neither of the computers do an excesive CPU usage. Let's say I get a X requests per second, if I run the console application two times at the same moment, I get X/2 request per second in each one... but still the web server is on 30% of CPU, the database server on 25%... I've tried to remove the thread.sleep in the loop, but it doesn't make a big difference. I'd like to put the machines to the maximun, to check how may requests per second they can provide. I guessed that I could do it in this way... but apparently I'm missing something here... What is the problem? Kind regards.

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• Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException

  - by Dheeraj kumar

  Hi, I have to read xls file in java.I used poi-3.6 to read xls file in Eclipse.But i m getting this ERROR"Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlException at ReadExcel2.main(ReadExcel2.java:38)". I have added following jars 1)poi-3.6-20091214.jar 2)poi-contrib-3.6-20091214.jar 3)poi-examples-3.6-20091214.jar 4)poi-ooxml-3.6-20091214.jar 5)poi-ooxml-schemas-3.6-20091214.jar 6)poi-scratchpad-3.6-20091214.jar Below is the code which i m using: import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFRow; import java.io.FileInputStream; import java.io.IOException; import java.util.Iterator; import java.util.List; import java.util.ArrayList; public class ReadExcel { public static void main(String[] args) throws Exception { // // An excel file name. You can create a file name with a full path // information. // String filename = "C:\\myExcel.xl"; // // Create an ArrayList to store the data read from excel sheet. // List sheetData = new ArrayList(); FileInputStream fis = null; try { // // Create a FileInputStream that will be use to read the excel file. // fis = new FileInputStream(filename); // // Create an excel workbook from the file system. // // HSSFWorkbook workbook = new HSSFWorkbook(fis); Workbook workbook = new XSSFWorkbook(fis); // // Get the first sheet on the workbook. // Sheet sheet = workbook.getSheetAt(0); // // When we have a sheet object in hand we can iterator on each // sheet's rows and on each row's cells. We store the data read // on an ArrayList so that we can printed the content of the excel // to the console. // Iterator rows = sheet.rowIterator(); while (rows.hasNext()) { Row row = (XSSFRow) rows.next(); Iterator cells = row.cellIterator(); List data = new ArrayList(); while (cells.hasNext()) { Cell cell = (XSSFCell) cells.next(); data.add(cell); } sheetData.add(data); } } catch (IOException e) { e.printStackTrace(); } finally { if (fis != null) { fis.close(); } } showExelData(sheetData); } private static void showExelData(List sheetData) { // // Iterates the data and print it out to the console. // for (int i = 0; i < sheetData.size(); i++) { List list = (List) sheetData.get(i); for (int j = 0; j < list.size(); j++) { Cell cell = (XSSFCell) list.get(j); System.out.print(cell.getRichStringCellValue().getString()); if (j < list.size() - 1) { System.out.print(", "); } } System.out.println(""); } } } Please help. thanks in anticipation, Regards, Dheeraj!

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• How do I use C# and ADO.NET to query an Oracle table with a spatial column of type SDO_GEOMETRY?

  - by John Donahue

  My development machine is running Windows 7 Enterprise, 64-bit version. I am using Visual Studio 2010 Release Candidate. I am connecting to an Oracle 11g Enterprise server version 11.1.0.7.0. I had a difficult time locating Oracle client software that is made for 64-bit Windows systems and eventually landed here to download what I assume is the proper client connectivity software. I added a reference to "Oracle.DataAccess" which is version 2.111.6.0 (Runtime Version is v2.0.50727). I am targeting .NET CLR version 4.0 since all properties of my VS Solution are defaults and this is 2010 RC. I was then able to write a console application in C# that established connectivity, executed a SELECT statement, and properly returned data when the table in question does NOT contain a spatial column. My problem is that this no longer works when the table I query has a column of type SDO_GEOMETRY in it. Below is the simple console application I am trying to run that reproduces the problem. When the code gets to the line with the "ExecuteReader" command, an exception is raised and the message is "Unsupported column datatype". using System; using System.Data; using Oracle.DataAccess.Client; namespace ConsoleTestOracle { class Program { static void Main(string[] args) { string oradb = string.Format("Data Source={0};User Id={1};Password={2};", "hostname/servicename", "login", "password"); try { using (OracleConnection conn = new OracleConnection(oradb)) { conn.Open(); OracleCommand cmd = new OracleCommand(); cmd.Connection = conn; cmd.CommandText = "select * from SDO_8307_2D_POINTS"; cmd.CommandType = CommandType.Text; OracleDataReader dr = cmd.ExecuteReader(); } } catch (Exception e) { string error = e.Message; } } } } The fact that this code works when used against a table that does not contain a spatial column of type SDO_GEOMETRY makes me think I have my windows 7 machine properly configured so I am surprised that I get this exception when the table contains different kinds of columns. I don't know if there is some configuration on my machine or the Oracle machine that needs to be done, or if the Oracle client software I have installed is wrong, or old and needs to be updated. Here is the SQL I used to create the table, populate it with some rows containing points in the spatial column, etc. if you want to try to reproduce this exactly. SQL Create Commands: create table SDO_8307_2D_Points (ObjectID number(38) not null unique, TestID number, shape SDO_GEOMETRY); Insert into SDO_8307_2D_Points values (1, 1, SDO_GEOMETRY(2001, 8307, null, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.0, 10.0))); Insert into SDO_8307_2D_Points values (2, 2, SDO_GEOMETRY(2001, 8307, null, SDO_ELEM_INFO_ARRAY(1, 1, 1), SDO_ORDINATE_ARRAY(10.0, 20.0))); insert into user_sdo_geom_metadata values ('SDO_8307_2D_Points', 'SHAPE', SDO_DIM_ARRAY(SDO_DIM_ELEMENT('Lat', -180, 180, 0.05), SDO_DIM_ELEMENT('Long', -90, 90, 0.05)), 8307); create index SDO_8307_2D_Point_indx on SDO_8307_2D_Points(shape) indextype is mdsys.spatial_index PARAMETERS ('sdo_indx_dims=2' ); Any advice or insights would be greatly appreciated. Thank you.

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• How to decrypt a string in C# that was encrypted in Delphi

  - by Simon Linder

  Hi all, we have a project written in Delphi that we want to convert to C#. Problem is that we have some passwords and settings that are encrypted and written into the registry. When we need a specified password we get it from the registry and decrypt it so we can use it. For the conversion into C# we have to do it the same way so that the application can also be used by users that have the old version and want to upgrade it. Here is the code we use to encrypt/decrypt strings in Delphi: unit uCrypt; interface function EncryptString(strPlaintext, strPassword : String) : String; function DecryptString(strEncryptedText, strPassword : String) : String; implementation uses DCPcrypt2, DCPblockciphers, DCPdes, DCPmd5; const CRYPT_KEY = '1q2w3e4r5t6z7u8'; function EncryptString(strPlaintext) : String; var cipher : TDCP_3des; strEncryptedText : String; begin if strPlaintext <> '' then begin try cipher := TDCP_3des.Create(nil); try cipher.InitStr(CRYPT_KEY, TDCP_md5); strEncryptedText := cipher.EncryptString(strPlaintext); finally cipher.Free; end; except strEncryptedText := ''; end; end; Result := strEncryptedText; end; function DecryptString(strEncryptedText) : String; var cipher : TDCP_3des; strDecryptedText : String; begin if strEncryptedText <> '' then begin try cipher := TDCP_3des.Create(nil); try cipher.InitStr(CRYPT_KEY, TDCP_md5); strDecryptedText := cipher.DecryptString(strEncryptedText); finally cipher.Free; end; except strDecryptedText := ''; end; end; Result := strDecryptedText; end; end. So for example when we want to encrypt the string asdf1234 we get the result WcOb/iKo4g8=. We now want to decrypt that string in C#. Here is what we tried to do: public static void Main(string[] args) { string Encrypted = "WcOb/iKo4g8="; string Password = "1q2w3e4r5t6z7u8"; string DecryptedString = DecryptString(Encrypted, Password); } public static string DecryptString(string Message, string Passphrase) { byte[] Results; System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding(); // Step 1. We hash the passphrase using MD5 // We use the MD5 hash generator as the result is a 128 bit byte array // which is a valid length for the TripleDES encoder we use below MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider(); byte[] TDESKey = HashProvider.ComputeHash(UTF8.GetBytes(Passphrase)); // Step 2. Create a new TripleDESCryptoServiceProvider object TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider(); // Step 3. Setup the decoder TDESAlgorithm.Key = TDESKey; TDESAlgorithm.Mode = CipherMode.ECB; TDESAlgorithm.Padding = PaddingMode.None; // Step 4. Convert the input string to a byte[] byte[] DataToDecrypt = Convert.FromBase64String(Message); // Step 5. Attempt to decrypt the string try { ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor(); Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length); } finally { // Clear the TripleDes and Hashprovider services of any sensitive information TDESAlgorithm.Clear(); HashProvider.Clear(); } // Step 6. Return the decrypted string in UTF8 format return UTF8.GetString(Results); } Well the result differs from the expected result. After we call DecryptString() we expect to get asdf1234but we get something else. Does anyone have an idea of how to decrypt that correctly? Thanks in advance Simon

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• Grails - Simple hasMany Problem - Using CheckBoxes rather than HTML Select in create.gsp

  - by gav

  My problem is this: I want to create a grails domain instance, defining the 'Many' instances of another domain that it has. I have the actual source in a Google Code Project but the following should illustrate the problem. class Person { String name static hasMany[skills:Skill] static constraints = { id (visible:false) skills (nullable:false, blank:false) } } class Skill { String name String description static constraints = { id (visible:false) name (nullable:false, blank:false) description (nullable:false, blank:false) } } If you use this model and def scaffold for the two Controllers then you end up with a form like this that doesn't work; My own attempt to get this to work enumerates the Skills as checkboxes and looks like this; But when I save the Volunteer the skills are null! This is the code for my save method; def save = { log.info "Saving: " + params.toString() def skills = params.skills log.info "Skills: " + skills def volunteerInstance = new Volunteer(params) log.info volunteerInstance if (volunteerInstance.save(flush: true)) { flash.message = "${message(code: 'default.created.message', args: [message(code: 'volunteer.label', default: 'Volunteer'), volunteerInstance.id])}" redirect(action: "show", id: volunteerInstance.id) log.info volunteerInstance } else { render(view: "create", model: [volunteerInstance: volunteerInstance]) } } This is my log output (I have custom toString() methods); 2010-05-10 21:06:41,494 [http-8080-3] INFO bumbumtrain.VolunteerController - Saving: ["skills":["1", "2"], "name":"Ian", "_skills":["", ""], "create":"Create", "action":"save", "controller":"volunteer"] 2010-05-10 21:06:41,495 [http-8080-3] INFO bumbumtrain.VolunteerController - Skills: [1, 2] 2010-05-10 21:06:41,508 [http-8080-3] INFO bumbumtrain.VolunteerController - Volunteer[ id: null | Name: Ian | Skills [Skill[ id: 1 | Name: Carpenter ] , Skill[ id: 2 | Name: Sound Engineer ] ]] Note that in the final log line the right Skills have been picked up and are part of the object instance. When the volunteer is saved the 'Skills' are ignored and not commited to the database despite the in memory version created clearly does have the items. Is it not possible to pass the Skills at construction time? There must be a way round this? I need a single form to allow a person to register but I want to normalise the data so that I can add more skills at a later time. If you think this should 'just work' then a link to a working example would be great. If I use the HTML Select then it works fine! Such as the following to make the Create page; <tr class="prop"> <td valign="top" class="name"> <label for="skills"><g:message code="volunteer.skills.label" default="Skills" /></label> </td> <td valign="top" class="value ${hasErrors(bean: volunteerInstance, field: 'skills', 'errors')}"> <g:select name="skills" from="${uk.co.bumbumtrain.Skill.list()}" multiple="yes" optionKey="id" size="5" value="${volunteerInstance?.skills}" /> </td> </tr> But I need it to work with checkboxes like this; <tr class="prop"> <td valign="top" class="name"> <label for="skills"><g:message code="volunteer.skills.label" default="Skills" /></label> </td> <td valign="top" class="value ${hasErrors(bean: volunteerInstance, field: 'skills', 'errors')}"> <g:each in="${skillInstanceList}" status="i" var="skillInstance"> <label for="${skillInstance?.name}"><g:message code="${skillInstance?.name}.label" default="${skillInstance?.name}" /></label> <g:checkBox name="skills" value="${skillInstance?.id.toString()}"/> </g:each> </td> </tr> The log output is exactly the same! With both style of form the Volunteer instance is created with the Skills correctly referenced in the 'Skills' variable. When saving, the latter fails with a null reference exception as shown at the top of this question. Hope this makes sense, thanks in advance! Gav

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• Creating a Reverse Proxy using Jpcap

  - by Ramon Marco Navarro

  I need to create a program that receives HTTP request and forwards those requests to the web servers. I have successfully made this using only Java Sockets but the client needed the program to be implemented in Jpcap. I'd like to know if this is possible and what literature I should be reading for this project. This is what I have now by stitching together pieces from the Jpcap tutorial: import java.net.InetAddress; import java.io.*; import jpcap.*; import jpcap.packet.*; public class Router { public static void main(String args[]) { //Obtain the list of network interfaces NetworkInterface[] devices = JpcapCaptor.getDeviceList(); //for each network interface for (int i = 0; i < devices.length; i++) { //print out its name and description System.out.println(i+": "+devices[i].name + "(" + devices[i].description+")"); //print out its datalink name and description System.out.println(" datalink: "+devices[i].datalink_name + "(" + devices[i].datalink_description+")"); //print out its MAC address System.out.print(" MAC address:"); for (byte b : devices[i].mac_address) System.out.print(Integer.toHexString(b&0xff) + ":"); System.out.println(); //print out its IP address, subnet mask and broadcast address for (NetworkInterfaceAddress a : devices[i].addresses) System.out.println(" address:"+a.address + " " + a.subnet + " "+ a.broadcast); } int index = 1; // set index of the interface that you want to open. //Open an interface with openDevice(NetworkInterface intrface, int snaplen, boolean promics, int to_ms) JpcapCaptor captor = null; try { captor = JpcapCaptor.openDevice(devices[index], 65535, false, 20); captor.setFilter("port 80 and host 192.168.56.1", true); } catch(java.io.IOException e) { System.err.println(e); } //call processPacket() to let Jpcap call PacketPrinter.receivePacket() for every packet capture. captor.loopPacket(-1,new PacketPrinter()); captor.close(); } } class PacketPrinter implements PacketReceiver { //this method is called every time Jpcap captures a packet public void receivePacket(Packet p) { JpcapSender sender = null; try { NetworkInterface[] devices = JpcapCaptor.getDeviceList(); sender = JpcapSender.openDevice(devices[1]); } catch(IOException e) { System.err.println(e); } IPPacket packet = (IPPacket)p; try { // IP Address of machine sending HTTP requests (the client) // It's still on the same LAN as the servers for testing purposes. packet.dst_ip = InetAddress.getByName("192.168.56.2"); } catch(java.net.UnknownHostException e) { System.err.println(e); } //create an Ethernet packet (frame) EthernetPacket ether=new EthernetPacket(); //set frame type as IP ether.frametype=EthernetPacket.ETHERTYPE_IP; //set source and destination MAC addresses // MAC Address of machine running reverse proxy server ether.src_mac = new MacAddress("08:00:27:00:9C:80").getAddress(); // MAC Address of machine running web server ether.dst_mac = new MacAddress("08:00:27:C7:D2:4C").getAddress(); //set the datalink frame of the packet as ether packet.datalink=ether; //send the packet sender.sendPacket(packet); sender.close(); //just print out a captured packet System.out.println(packet); } } Any help would be greatly appreciated. Thank you.

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• no namenode error in pseudo-mode

  - by Anshu Basia

  I'm new to hadoop and is in learning phase. As per Hadoop Definitve guide, i have set up my hadoop in pseudo distributed mode and everything was working fine. I was even able to execute all the examples from chapter 3 yesterday. Today, when i rebooted my unix and tried to run start-dfs.sh and then tried http://localhost/50070....it is showing error and when i try to stop dfs (stop-dfs.sh) it says no namenode to stop. I have been googling the issue but no result. Also, when i format my namenode again...everything starts working fine and i'm able to connect to the localhost/50070 and even replicate files and directories in hdfs but as soon as i restart my linux and try to connect to hdfs the same problem comes up. Below is the error log: ************************************************************/ 2011-06-22 15:45:55,249 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = ubuntu/127.0.1.1 STARTUP_MSG: args = [] STARTUP_MSG: version = 0.20.203.0 STARTUP_MSG: build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203 -r 1099333; compiled by 'oom' on Wed May 4 07:57:50 PDT 2011 ************************************************************/ 2011-06-22 15:45:56,383 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2011-06-22 15:45:56,455 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source MetricsSystem,sub=Stats registered. 2011-06-22 15:45:56,494 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s). 2011-06-22 15:45:56,494 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system started 2011-06-22 15:45:57,007 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source ugi registered. 2011-06-22 15:45:57,031 WARN org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Source name ugi already exists! 2011-06-22 15:45:57,059 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source jvm registered. 2011-06-22 15:45:57,070 INFO org.apache.hadoop.metrics2.impl.MetricsSourceAdapter: MBean for source NameNode registered. 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: VM type = 32-bit 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: 2% max memory = 19.33375 MB 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: capacity = 2^22 = 4194304 entries 2011-06-22 15:45:57,374 INFO org.apache.hadoop.hdfs.util.GSet: recommended=4194304, actual=4194304 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: fsOwner=anshu 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: supergroup=supergroup 2011-06-22 15:45:57,854 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isPermissionEnabled=true 2011-06-22 15:45:57,868 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: dfs.block.invalidate.limit=100 2011-06-22 15:45:57,869 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s) 2011-06-22 15:45:58,769 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Registered FSNamesystemStateMBean and NameNodeMXBean 2011-06-22 15:45:58,809 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: Caching file names occuring more than 10 times **2011-06-22 15:45:58,825 INFO org.apache.hadoop.hdfs.server.common.Storage: Storage directory /tmp/hadoop-anshu/dfs/name does not exist. 2011-06-22 15:45:58,827 ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-anshu/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.h**adoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162) 2011-06-22 15:45:58,828 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: org.apache.hadoop.hdfs.server.common.InconsistentFSStateException: Directory /tmp/hadoop-anshu/dfs/name is in an inconsistent state: storage directory does not exist or is not accessible. at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:291) at org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:97) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:379) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:353) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:254) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1153) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1162) 2011-06-22 15:45:58,829 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at ubuntu/127.0.1.1 ************************************************************/ Any help is appreciated Thank-you

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• Using Xlib via JNA to move a window

  - by rob

  I'm using JNA to manipulate application windows on Linux by sending Xlib messages but can't seem to move a window. My original implementation executed wmctrl on the shell to move the windows and that successfully moved the windows. Unfortunately, there's a noticeable amount of overhead associated with calling shell programs from Java, so now I'm trying to make direct API calls using JNA. I'm using the X11 example available from the JNA website and can successfully do a few tricks, such as enumerating the window IDs and reading window properties, so I know JNA+Xlib is at least partially working. First I tried moving the windows directly using XMoveWindow() but the window manager was apparently blocking those calls. I ran across a thread that suggested I needed to send a client message using XSendMessage(), so I've done that below, but apparently XSendMessage() is failing because the window doesn't move and I get a return value of 0. I'm guessing I omitted something obvious, but can't quite figure it out. Any suggestions? Note that, for the purposes of this example, the main method has a window ID hard-coded. This is the window ID of the window I'm trying to move (obtained using wmctrl -l on the console). import com.sun.jna.NativeLong; import com.sun.jna.Pointer; import com.sun.jna.examples.unix.X11; import com.sun.jna.examples.unix.X11.Atom; import com.sun.jna.examples.unix.X11.AtomByReference; import com.sun.jna.examples.unix.X11.Display; import com.sun.jna.examples.unix.X11.Window; import com.sun.jna.examples.unix.X11.WindowByReference; import com.sun.jna.examples.unix.X11.XEvent; import com.sun.jna.examples.unix.X11.XTextProperty; import com.sun.jna.examples.unix.X11.XWindowAttributes; import com.sun.jna.ptr.IntByReference; import com.sun.jna.ptr.NativeLongByReference; import com.sun.jna.ptr.PointerByReference; private static final int FALSE = 0; /** C-style boolean "false" */ private static final int TRUE = 1; /** C-style boolean "true" */ public static void main(String[] args) { setWindowPos(new Window(0x01300007), 100, 100, 600, 400); // update the Window constructor with the appropriate ID given by wmctrl -l } public static boolean setWindowPos(Window window, int x, int y, int w, int h) { final X11 x11 = X11.INSTANCE; Display display = x11.XOpenDisplay(null); NativeLong mask = new NativeLong(X11.SubstructureRedirectMask | X11.SubstructureNotifyMask | X11.ResizeRedirectMask); XEvent event = new XEvent(); String msg = "_NET_MOVERESIZE_WINDOW"; //$NON-NLS-1$ long grflags = 0l; // use the default gravity of the window if (x != -1) grflags |= (1 << 8); if (y != -1) grflags |= (1 << 9); if (w != -1) grflags |= (1 << 10); if (h != -1) grflags |= (1 << 11); event.xclient.type = X11.ClientMessage; event.xclient.serial = new NativeLong(0l); event.xclient.send_event = TRUE; event.xclient.message_type = x11.XInternAtom(display, msg, false); event.xclient.window = window; event.xclient.format = 32; event.xclient.data.l[0] = new NativeLong(grflags); // gravity flags event.xclient.data.l[1] = new NativeLong(x); event.xclient.data.l[2] = new NativeLong(y); event.xclient.data.l[3] = new NativeLong(w); event.xclient.data.l[4] = new NativeLong(h); int status = x11.XSendEvent(display, x11.XDefaultRootWindow(display), FALSE, mask, event); x11.XFlush(display); // need to XFlush if we're not reading X events if (status == 0) { // 0 indicates XSendEvent failed logger.error("setWindowPos: XSendEvent failed (" + msg + ")"); //$NON-NLS-1$ return false; } return true; }

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• Emails forwarded via postfix get flagged as spam and forged in Gmail

  - by Kendall Hopkins

  I'm trying to setup a forwarding only email server. I'm running into the problem where all messages forwarded via postfix are getting put into gmail's spam folder and getting flagged as forged. I'm testing a very similar setup on a cpanel box and their forwarded emails make it through without any problem. Things I've done: Setup reverse dns on forwarding box Setup SPF record for forwarding box domain CPanel route (not flagged as spam): [email protected] - [email protected] - [email protected] AWS postfix route (flagged as spam): [email protected] - [email protected] - [email protected] Gmail error message: /etc/postfix/main.cf myhostname = sputnik.*domain*.com smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no myorigin = /etc/mailname mydestination = sputnik.*domain*.com, localhost.*domain*.com, , localhost relayhost = mynetworks = 127.0.0.0/8 10.0.0.0/24 [::1]/128 [fe80::%eth0]/64 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all virtual_alias_maps = hash:/etc/postfix/virtual Email forwarded by CPanel (doesn't get marked as spam): Delivered-To: *personaluser*@gmail.com Received: by 10.182.144.98 with SMTP id sl2csp14396obb; Wed, 9 May 2012 09:18:36 -0700 (PDT) Received: by 10.182.52.38 with SMTP id q6mr1137571obo.8.1336580316700; Wed, 09 May 2012 09:18:36 -0700 (PDT) Return-Path: <mail@*personaldomain*.com> Received: from web6.*domain*.com (173.193.55.66-static.reverse.softlayer.com. [173.193.55.66]) by mx.google.com with ESMTPS id ec7si1845451obc.67.2012.05.09.09.18.36 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 09 May 2012 09:18:36 -0700 (PDT) Received-SPF: neutral (google.com: 173.193.55.66 is neither permitted nor denied by best guess record for domain of mail@*personaldomain*.com) client-ip=173.193.55.66; Authentication-Results: mx.google.com; spf=neutral (google.com: 173.193.55.66 is neither permitted nor denied by best guess record for domain of mail@*personaldomain*.com) smtp.mail=mail@*personaldomain*.com Received: from mail-vb0-f43.google.com ([209.85.212.43]:56152) by web6.*domain*.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.77) (envelope-from <mail@*personaldomain*.com>) id 1SS9b2-0007J9-LK for mail@kendall.*domain*.com; Wed, 09 May 2012 12:18:36 -0400 Received: by vbbfq11 with SMTP id fq11so599132vbb.2 for <mail@kendall.*domain*.com>; Wed, 09 May 2012 09:18:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:x-originating-ip:date:message-id:subject:from:to :content-type:x-gm-message-state; bh=Hr0AH40uUtx/w/u9hltbrhHJhRaD5ubKmz2gGg44VLs=; b=IBKi6Xalr9XVFYwdkWxn9PLRB69qqJ9AjUPdvGh8VxMNW4S+hF6r4GJcGOvkDn2drO kw5r4iOpGuWUQPEMHRPyO4+Ozc9SE9s4Px2oVpadR6v3hO+utvFGoj7UuchsXzHqPVZ8 A9FS4cKiE0E0zurTjR7pfQtZT64goeEJoI/CtvcoTXj/Mdrj36gZ2FYtO8Qj4dFXpfu9 uGAKa4jYfx9zwdvhLzQ3mouWwQtzssKUD+IvyuRppLwI2WFb9mWxHg9n8y9u5IaduLn7 7TvLIyiBtS3DgqSKQy18POVYgnUFilcDorJs30hxFxJhzfTFW1Gdhrwjvz0MTYDSRiGQ P4aw== MIME-Version: 1.0 Received: by 10.52.173.209 with SMTP id bm17mr326586vdc.54.1336580315681; Wed, 09 May 2012 09:18:35 -0700 (PDT) Received: by 10.220.191.134 with HTTP; Wed, 9 May 2012 09:18:35 -0700 (PDT) X-Originating-IP: [99.50.225.7] Date: Wed, 9 May 2012 12:18:35 -0400 Message-ID: <CA+tP6Viyn0ms5RJoqtd20ms3pmQCgyU0yy7GBiaALEACcDBC2g@mail.gmail.com> Subject: test5 From: Kendall Hopkins <mail@*personaldomain*.com> To: mail@kendall.*domain*.com Content-Type: multipart/alternative; boundary=bcaec51b9bf5ee11c004bf9cda9c X-Gm-Message-State: ALoCoQm3t1Hohu7fEr5zxQZsC8FQocg662Jv5MXlPXBnPnx2AiQrbLsNQNknLy39Su45xBMCM47K X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - web6.*domain*.com X-AntiAbuse: Original Domain - kendall.*domain*.com X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - *personaldomain*.com X-Source: X-Source-Args: X-Source-Dir: --bcaec51b9bf5ee11c004bf9cda9c Content-Type: text/plain; charset=ISO-8859-1 test5 --bcaec51b9bf5ee11c004bf9cda9c Content-Type: text/html; charset=ISO-8859-1 test5 --bcaec51b9bf5ee11c004bf9cda9c-- Email forwarded via AWS postfix box (marked as spam): Delivered-To: *personaluser*@gmail.com Received: by 10.182.144.98 with SMTP id sl2csp14350obb; Wed, 9 May 2012 09:17:46 -0700 (PDT) Received: by 10.229.137.143 with SMTP id w15mr389471qct.37.1336580266237; Wed, 09 May 2012 09:17:46 -0700 (PDT) Return-Path: <mail@*personaldomain*.com> Received: from sputnik.*domain*.com (sputnik.*domain*.com. [107.21.39.201]) by mx.google.com with ESMTP id o8si1330855qct.115.2012.05.09.09.17.46; Wed, 09 May 2012 09:17:46 -0700 (PDT) Received-SPF: neutral (google.com: 107.21.39.201 is neither permitted nor denied by best guess record for domain of mail@*personaldomain*.com) client-ip=107.21.39.201; Authentication-Results: mx.google.com; spf=neutral (google.com: 107.21.39.201 is neither permitted nor denied by best guess record for domain of mail@*personaldomain*.com) smtp.mail=mail@*personaldomain*.com Received: from mail-vb0-f52.google.com (mail-vb0-f52.google.com [209.85.212.52]) by sputnik.*domain*.com (Postfix) with ESMTP id A308122AD6 for <mail@*personaldomain2*.com>; Wed, 9 May 2012 16:17:45 +0000 (UTC) Received: by vbzb23 with SMTP id b23so448664vbz.25 for <mail@*personaldomain2*.com>; Wed, 09 May 2012 09:17:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:x-originating-ip:date:message-id:subject:from:to :content-type:x-gm-message-state; bh=XAzjH9tUXn6SbadVSLwJs2JVbyY4arosdTuV8Nv+ARI=; b=U8gIgHd6mhWYqPU4MH/eyvo3kyZsDn/GiYwZj5CLbs6Zz/ZOXQkenRi7zW3ewVFi/9 uAFylT8SQ+Wjw2l6OgAioCTojfZ58s4H/JW+1bu460KAP9aeOTcZDNSsHlsj0wvH5XRV 4DQJa11kz+WFVtVVcFuB33WVUPAgJfXzY+pSTe+FWsrZyrrwL7/Vm9TSKI5PBwRN9i4g zAZabgkmw1o2THT3kbJi6vAbPzlqK2LVbgt82PP0emHdto7jl4iD5F6lVix4U0dsrtRv xuGUE0gDyIwJuR4Q5YTkNubwGH/Y2bFBtpx2q1IORANrolWxIGaZSceUWawABkBGPABX 1/eg== MIME-Version: 1.0 Received: by 10.52.96.169 with SMTP id dt9mr282954vdb.107.1336580265812; Wed, 09 May 2012 09:17:45 -0700 (PDT) Received: by 10.220.191.134 with HTTP; Wed, 9 May 2012 09:17:45 -0700 (PDT) X-Originating-IP: [99.50.225.7] Date: Wed, 9 May 2012 12:17:45 -0400 Message-ID: <CA+tP6VgqZrdxP543Y28d1eMwJAs4DxkS4EE6bvRL8nFoMkgnQQ@mail.gmail.com> Subject: test4 From: Kendall Hopkins <mail@*personaldomain*.com> To: mail@*personaldomain2*.com Content-Type: multipart/alternative; boundary=20cf307f37f6f521b304bf9cd79d X-Gm-Message-State: ALoCoQkrNcfSTWz9t6Ir87KEYyM+zJM4y1AbwP86NMXlk8B3ALhnis+olFCKdgPnwH/sIdzF3+Nh --20cf307f37f6f521b304bf9cd79d Content-Type: text/plain; charset=ISO-8859-1 test4 --20cf307f37f6f521b304bf9cd79d Content-Type: text/html; charset=ISO-8859-1 test4 --20cf307f37f6f521b304bf9cd79d--

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• WPF UserControl Style results in error message

  - by Didier

  Hi I'm new in WPF so I try to create a WPF UserControl. My problem is about the style of the user control I've Created. On a design time I got this error message Can only base on a Style with target type that is base type 'RichTextBox'. at System.Windows.Style.Seal() at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache) at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e) at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args) at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, OperationType operationType) at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp) at System.Windows.FrameworkElement.UpdateStyleProperty() at System.Windows.TreeWalkHelper.InvalidateStyleAndReferences(DependencyObject d, ResourcesChangeInfo info, Boolean containsTypeOfKey) at System.Windows.TreeWalkHelper.OnResourcesChanged(DependencyObject d, ResourcesChangeInfo info, Boolean raiseResourceChangedEvent) at System.Windows.TreeWalkHelper.OnResourcesChangedCallback(DependencyObject d, ResourcesChangeInfo info) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker1._VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.VisitNode(FrameworkElement fe) at System.Windows.DescendentsWalker1.VisitNode(DependencyObject d) at System.Windows.DescendentsWalker1.WalkLogicalChildren(FrameworkElement feParent, FrameworkContentElement fceParent, IEnumerator logicalChildren) at System.Windows.DescendentsWalker1.WalkFrameworkElementLogicalThenVisualChildren(FrameworkElement feParent, Boolean hasLogicalChildren) at System.Windows.DescendentsWalker1.IterateChildren(DependencyObject d) at System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode) at System.Windows.TreeWalkHelper.InvalidateOnResourcesChange(FrameworkElement fe, FrameworkContentElement fce, ResourcesChangeInfo info) at System.Windows.ResourceDictionary.NotifyOwners(ResourcesChangeInfo info) at System.Windows.ResourceDictionary.EndInit() at MS.Internal.Host.Designer.OnAppResourcesChanged(Object sender, EventArgs e) at MS.Internal.Host.Designer.get_View() at MS.Internal.Designer.VSDesigner.Load() at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedView.Load() at MS.Internal.Designer.VSIsolatedDesigner.VSIsolatedDesignerFactory.Load(IsolatedView view) at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view) at MS.Internal.Host.Isolation.IsolatedDesigner.BootstrapProxy.LoadDesigner(IsolatedDesignerFactory factory, IsolatedView view) at MS.Internal.Host.Isolation.IsolatedDesigner.Load() at MS.Internal.Designer.DesignerPane.LoadDesignerView() And at a run time An error Message type XamlParseException Occurs and the message is: Cannot create instance of 'RichTextBox' defined in assembly 'PresentationFramework, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Can only base on a Style with target type that is base type 'RichTextBox'. Error at object 'System.Windows.Controls.Grid' in markup file 'NameSpace;component/usercontrols /myusercontrol.xaml' Line 125 Position 14. My user control have 3 richtextboxes 1 textbox and 3 dropdownlist and about 10 buttons. I think The problem is about to define the style of my user control, can anyone help me to do this. Thanks

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• Using MigLayout, why is a JButton following a JTable unresponsive and how to fix this?

  - by M. Joanis

  Hi everyone, I am having a mind-boggling problem regarding the use of a JButton following a JTable with MigLayout. It is totally unresponsive unless I push it far enough past the JTable (then it can behave correctly). I have tried running the code with both the MigLayout JAR of the version we use for end user products and with the very most recent one; same result. Here is a sample code reproducing the problem (Main.java): import java.awt.Dimension; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.table.DefaultTableModel; import net.miginfocom.swing.MigLayout; @SuppressWarnings("serial") public class Main extends JFrame { private JPanel panel; private JTextField textField; private JButton chooseButton; private JTable table; private JButton reloadButton; private final DefaultTableModel model = new DefaultTableModel() { @Override public boolean isCellEditable(int row, int column) { return false; } }; public Main() { panel = new JPanel(new MigLayout("debug", "[][grow][]")); setContentPane(panel); setDefaultCloseOperation(EXIT_ON_CLOSE); /*** First row ***/ // "File:" panel.add(new JLabel("File:")); // textField for filename textField = new JTextField("No file selected yet!"); textField.setEditable(false); panel.add(textField, "growx"); // "Choose..." button chooseButton = new JButton("Choose..."); panel.add(chooseButton, "wrap, sg buttons"); /*** Second row ***/ panel.add(new JLabel()); table = new JTable(model); model.setColumnIdentifiers(new String[] {"col title"}); JScrollPane scrollpane = new JScrollPane(table); Dimension scrollpaneDimension = new Dimension(125, 110); scrollpane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); table.setPreferredScrollableViewportSize(scrollpaneDimension); table.setFillsViewportHeight(true); panel.add(table.getTableHeader(), "grow"); panel.add(scrollpane, "grow"); reloadButton = new JButton("Reload"); panel.add(reloadButton, "top, wrap, sg buttons"); pack(); setVisible(true); } public static void main(String[] args) { new Main(); } } I suppose it has something to do with the table header and the table itself ending up in the same layout cell, but I'm really not sure of this. As I said, if I push the button far enough past the JTable, it will work again. If I drop it on the next row, it doesn't work, I have to move it down one more row. The only library you need in your workspace to run the code is MigLayout. Thank you all for your help, much appreciated! M. Joanis

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• JpegBitmapEncoder.Save() throws exception when writing image with metadata to MemoryStream

  - by Dmitry

  I am trying to set up metadata on JPG image what does not have it. You can't use in-place writer (InPlaceBitmapMetadataWriter) in this case, cuz there is no place for metadata in image. If I use FileStream as output - everything works fine. But if I try to use MemoryStream as output - JpegBitmapEncoder.Save() throws an exception (Exception from HRESULT: 0xC0000005). After some investigation I also found out what encoder can save image to memory stream if I supply null instead of metadata. I've made a very simplified and short example what reproduces the problem: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Drawing; using System.Drawing.Imaging; using System.Windows.Media.Imaging; namespace JpegSaveTest { class Program { public static JpegBitmapEncoder SetUpMetadataOnStream(Stream src, string title) { uint padding = 2048; BitmapDecoder original; BitmapFrame framecopy, newframe; BitmapMetadata metadata; JpegBitmapEncoder output = new JpegBitmapEncoder(); src.Seek(0, SeekOrigin.Begin); original = JpegBitmapDecoder.Create(src, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad); if (original.Frames[0] != null) { framecopy = (BitmapFrame)original.Frames[0].Clone(); if (original.Frames[0].Metadata != null) metadata = original.Frames[0].Metadata.Clone() as BitmapMetadata; else metadata = new BitmapMetadata("jpeg"); metadata.SetQuery("/app1/ifd/PaddingSchema:Padding", padding); metadata.SetQuery("/app1/ifd/exif/PaddingSchema:Padding", padding); metadata.SetQuery("/xmp/PaddingSchema:Padding", padding); metadata.SetQuery("System.Title", title); newframe = BitmapFrame.Create(framecopy, framecopy.Thumbnail, metadata, original.Frames[0].ColorContexts); output.Frames.Add(newframe); } else { Exception ex = new Exception("Image contains no frames."); throw ex; } return output; } public static MemoryStream SetTagsInMemory(string sfname, string title) { Stream src, dst; JpegBitmapEncoder output; src = File.Open(sfname, FileMode.Open, FileAccess.Read, FileShare.Read); output = SetUpMetadataOnStream(src, title); dst = new MemoryStream(); output.Save(dst); src.Close(); return (MemoryStream)dst; } static void Main(string[] args) { string filename = "Z:\\dotnet\\gnom4.jpg"; MemoryStream s; s = SetTagsInMemory(filename, "test title"); } } } It is simple console application. To run it, replace filename variable content with path to any .jpg file without metadata (or use mine). Ofc I can just save image to temporary file first, close it, then open and copy to MemoryStream, but its too dirty and slow workaround. Any ideas about getting this working are welcome :)

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• Serial Port Not getting closed. I want to release the COM port ...

  - by sunil

  Serial Port Not getting closed. I want to release the COM port ... Below is my code.... import java.io.*; import java.util.*; import gnu.io.*; public class ReadCommPort implements SerialPortEventListener { static CommPortIdentifier portId; static Enumeration portList; InputStream inputStream; OutputStream outputStream; public SerialPort serialPort; List byteList = new ArrayList(); public static Message message = null; public void readData() { boolean portFound = false; String defaultPort = "COM1"; portList = CommPortIdentifier.getPortIdentifiers(); while ( portList.hasMoreElements() ) { portId = ( CommPortIdentifier )portList.nextElement(); if ( portId.getPortType() == CommPortIdentifier.PORT_SERIAL ) { if ( portId.getName().equals( defaultPort ) ) { System.out.println( "Found port: " + defaultPort ); portFound = true; buildSerialPort(); } } } if ( ! portFound ) { System.out.println( "port " + defaultPort + " not found." ); } } public void buildSerialPort() { try { serialPort = (SerialPort) portId.open( "ReadCommPort", 1 ); inputStream = serialPort.getInputStream(); outputStream = serialPort.getOutputStream(); serialPort.addEventListener( this ); serialPort.notifyOnDataAvailable(true); serialPort.setSerialPortParams( 2400, SerialPort.DATABITS_7, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE ); } catch ( Exception e ) { e.printStackTrace(); } } @SuppressWarnings("unchecked") public void serialEvent( SerialPortEvent event ) { switch ( event.getEventType() ) { case SerialPortEvent.BI: System.out.println( "BI"); break; case SerialPortEvent.OE: System.out.println( "OE"); break; case SerialPortEvent.FE: System.out.println( "FE"); break; case SerialPortEvent.PE: System.out.println( "PE"); break; case SerialPortEvent.CD: System.out.println( "CD"); break; case SerialPortEvent.CTS: System.out.println( "CTS"); break; case SerialPortEvent.DSR: System.out.println( "DSR"); break; case SerialPortEvent.RI: System.out.println( "RI"); break; case SerialPortEvent.OUTPUT_BUFFER_EMPTY: System.out.println( "OUTPUT_BUFFER_EMPTY"); break; case SerialPortEvent.DATA_AVAILABLE : try { int len = inputStream.available(); byte[] readBuffer = new byte[ len ]; // processing data code.. // close the port // release all resources... serialPort.removeEventListener(); try { serialPort.addEventListener( null ); } catch (TooManyListenersException e) { e.printStackTrace(); } inputStream.close(); outputStream.close(); serialPort.close(); } catch ( IOException e ) { e.printStackTrace(); } break; } } public static void main(String[] args) { new ReadCommPort().readData(); } }

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• not able to write log file to specified path(Microsoft Enterprise Library Logging)

  - by prince23

  hi, i am trying to implement the logging Configuration using Microsoft Enterprise Library Logging class Program { static void Main(string[] args) { LogEntry entry = new LogEntry() { Message = "Hello Ent. Lib. Logging" }; Logger.Write(entry); } } here the entry conyain she details. but these details are not written in the file i web config i have the settings done like this. <?xml version="1.0" encoding="utf-8"?> <configuration> <configSections> <section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> <section name="exceptionHandling" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Configuration.ExceptionHandlingSettings, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </configSections> <loggingConfiguration name="Logging Application Block" tracingEnabled="true" defaultCategory="General" logWarningsWhenNoCategoriesMatch="true"> <listeners> <add fileName="C:\Inetpub\wwwroot\trace.log" header="----------------------------------------" footer="----------------------------------------" formatter="" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" traceOutputOptions="None" filter="All" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="FlatFile TraceListener" /> <add source="Enterprise Library Logging" formatter="Text Formatter" log="Application" machineName="" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FormattedEventLogTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" traceOutputOptions="None" filter="All" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FormattedEventLogTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Formatted EventLog TraceListener" /> </listeners> <formatters> <add template="Timestamp: {timestamp}&#xD;&#xA;Message: {message}&#xD;&#xA;Category: {category}&#xD;&#xA;Priority: {priority}&#xD;&#xA;EventId: {eventid}&#xD;&#xA;Severity: {severity}&#xD;&#xA;Title:{title}&#xD;&#xA;Machine: {machine}&#xD;&#xA;Application Domain: {appDomain}&#xD;&#xA;Process Id: {processId}&#xD;&#xA;Process Name: {processName}&#xD;&#xA;Win32 Thread Id: {win32ThreadId}&#xD;&#xA;Thread Name: {threadName}&#xD;&#xA;Extended Properties: {dictionary({key} - {value}&#xD;&#xA;)}" type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Text Formatter" /> </formatters> <categorySources> <add switchValue="All" name="General"> <listeners> <add name="Formatted EventLog TraceListener" /> </listeners> </add> </categorySources> <specialSources> <allEvents switchValue="All" name="All Events" /> <notProcessed switchValue="All" name="Unprocessed Category" /> <errors switchValue="All" name="Logging Errors &amp; Warnings"> <listeners> <add name="Formatted EventLog TraceListener" /> </listeners> </errors> </specialSources> </loggingConfiguration> <exceptionHandling> <exceptionPolicies> <add name="Exception Policy"> <exceptionTypes> <add type="System.Exception, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" postHandlingAction="NotifyRethrow" name="Exception" /> </exceptionTypes> </add> </exceptionPolicies> </exceptionHandling> </configuration> i am trying by best to solve this from past 2 days. if any one knw what is the issue here. why my log file is not written in the specified path. and even the details of log are not written in the file path fileName="C:\Inetpub\wwwroot\trace.log"

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• nhibernate says 'mapping exception was unhandled' no persister for: MyNH.Domain.User

  - by mrblah

  Hi, I am using nHibernate and fluent. I created a User.cs: public class User { public virtual int Id { get; set; } public virtual string Username { get; set; } public virtual string Password { get; set; } public virtual string Email { get; set; } public virtual DateTime DateCreated { get; set; } public virtual DateTime DateModified { get; set; } } Then in my mappinds folder: public class UserMapping : ClassMap<User> { public UserMapping() { WithTable("ay_users"); Not.LazyLoad(); Id(x => x.Id).GeneratedBy.Identity(); Map(x => x.Username).Not.Nullable().WithLengthOf(256); Map(x => x.Password).Not.Nullable().WithLengthOf(256); Map(x => x.Email).Not.Nullable().WithLengthOf(100); Map(x => x.DateCreated).Not.Nullable(); Map(x => x.DateModified).Not.Nullable(); } } Using the repository pattern for the nhibernate blog: public class UserRepository : Repository<User> { } public class Repository<T> : IRepository<T> { public ISession Session { get { return SessionProvider.GetSession(); } } public T GetById(int id) { return Session.Get<T>(id); } public ICollection<T> FindAll() { return Session.CreateCriteria(typeof(T)).List<T>(); } public void Add(T product) { Session.Save(product); } public void Remove(T product) { Session.Delete(product); } } public interface IRepository<T> { T GetById(int id); ICollection<T> FindAll(); void Add(T entity); void Remove(T entity); } public class SessionProvider { private static Configuration configuration; private static ISessionFactory sessionFactory; public static Configuration Configuration { get { if (configuration == null) { configuration = new Configuration(); configuration.Configure(); configuration.AddAssembly(typeof(User).Assembly); } return configuration; } } public static ISessionFactory SessionFactory { get { if (sessionFactory == null) sessionFactory = Configuration.BuildSessionFactory(); return sessionFactory; } } private SessionProvider() { } public static ISession GetSession() { return SessionFactory.OpenSession(); } } My config: <?xml version="1.0" encoding="utf-8" ?> <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2"> <session-factory> <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property> <property name="dialect">NHibernate.Dialect.MsSql2005Dialect</property> <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property> <property name="connection.connection_string">Server=.\SqlExpress;Initial Catalog=TestNH;User Id=dev;Password=123</property> <property name="show_sql">true</property> </session-factory> </hibernate-configuration> I created a console application to test the output: static void Main(string[] args) { Console.WriteLine("starting..."); UserRepository users = new UserRepository(); User user = users.GetById(1); Console.WriteLine("user is null: " + (null == user)); if(null != user) Console.WriteLine("User: " + user.Username); Console.WriteLine("ending..."); Console.ReadLine(); } Error: nhibernate says 'mapping exception was unhandled' no persister for: MyNH.Domain.User What could be the issue, I did do the mapping?

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• Apache MINA NIO connector help

  - by satya

  I'm new to using MINA. I've a program which uses MINA NIOconnector to connect to host. I'm able to send data and also receive. This is clear from log4j log which i'm attaching below. E:\>java TC4HostClient [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - CREATED [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - OPENED Opened CGS Sign On [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - SENT: HeapBuffer[pos=0 lim=370 cap=512: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20...] [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - SENT: HeapBuffer[pos=0 lim=0 cap=0: empty] Message Sent 00000333CST 1001010 00000308000003080010000 000009600000000FTS O00000146TC4DS 001WSJTC41 ---001NTMU9001-I --- -----000 0030000000012400000096500007013082015SATYA 500000 010165070000002200011 01800000000022000001241 172.16.25.122 02 [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - RECEIVED: HeapBuffer[pos=0 lim=36 cap=2048: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20...] [12:21:46] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - RECEIVED: HeapBuffer[pos=0 lim=505 cap=2048: 31 20 20 20 20 20 20 20 20 3 0 30 30 30 30 34 38...] After Writing [12:21:52] NioProcessor-1 INFO [] [] [org.apache.mina.filter.logging.LoggingFil ter] - CLOSED Though i see "RECEIVED" in log my handler messageReceived method is not being called. Can anyone please help me in this regard and tell me what i'm doing wrong import java.io.IOException; import java.net.InetSocketAddress; import java.nio.charset.Charset; import java.net.SocketAddress; import org.apache.mina.core.service.IoAcceptor; import org.apache.mina.core.session.IdleStatus; import org.apache.mina.filter.codec.ProtocolCodecFilter; import org.apache.mina.filter.codec.textline.TextLineCodecFactory; import org.apache.mina.filter.logging.LoggingFilter; import org.apache.mina.transport.socket.nio.NioSocketConnector; import org.apache.mina.core.session.IoSession; import org.apache.mina.core.future.*; public class TC4HostClient { private static final int PORT = 9123; public static void main( String[] args ) throws IOException,Exception { NioSocketConnector connector = new NioSocketConnector(); SocketAddress address = new InetSocketAddress("172.16.25.3", 8004); connector.getSessionConfig().setReadBufferSize( 2048 ); connector.getFilterChain().addLast( "logger", new LoggingFilter() ); connector.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "UTF-8" )))); connector.setHandler(new TC4HostClientHandler()); ConnectFuture future1 = connector.connect(address); future1.awaitUninterruptibly(); if (!future1.isConnected()) { return ; } IoSession session = future1.getSession(); System.out.println("CGS Sign On"); session.getConfig().setUseReadOperation(true); session.write(" 00000333CST 1001010 00000308000003080010000000009600000000FTS O00000146TC4DS 001WSJTC41 ---001NTMU9001-I --------000 0030000000012400000096500007013082015SATYA 500000 010165070000002200011 01800000000022000001241 172.16.25.122 02"); session.getCloseFuture().awaitUninterruptibly(); System.out.println("After Writing"); connector.dispose(); } } import org.apache.mina.core.session.IdleStatus; import org.apache.mina.core.service.IoHandlerAdapter; import org.apache.mina.core.session.IoSession; import org.apache.mina.core.buffer.IoBuffer; public class TC4HostClientHandler extends IoHandlerAdapter { @Override public void exceptionCaught( IoSession session, Throwable cause ) throws Exception { cause.printStackTrace(); } @Override public void messageSent( IoSession session, Object message ) throws Exception { String str = message.toString(); System.out.println("Message Sent" + str); } @Override public void messageReceived( IoSession session, Object message ) throws Exception { IoBuffer buf = (IoBuffer) message; // Print out read buffer content. while (buf.hasRemaining()) { System.out.print((char) buf.get()); } System.out.flush(); } /* @Override public void messageReceived( IoSession session, Object message ) throws Exception { String str = message.toString(); System.out.println("Message Received : " + str); }*/ @Override public void sessionIdle( IoSession session, IdleStatus status ) throws Exception { System.out.println( "IDLE " + session.getIdleCount( status )); } public void sessionClosed(IoSession session){ System.out.println( "Closed "); } public void sessionOpened(IoSession session){ System.out.println( "Opened "); } }

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• non-static variable cannot be referenced from a static context (java)

  - by Greg

  I ask that you ignore all logic.. i was taught poorly at first and so i still dont understand everything about static crap and its killing me. My error is with every single variable that i declare then try to use later inside my methods... i get the non-static variable cannot~~ error I can simply put all the rough coding of my methods inside my cases, and it works but then i cannot use recursion... What i really need is someone to help on the syntax and point me on the right direction of how to have my methods recognize my variables at the top... like compareCount etc thanks public class MyProgram7 { public static void main (String[]args) throws IOException{ Scanner scan = new Scanner(System.in); int compareCount = 0; int low = 0; int high = 0; int mid = 0; int key = 0; Scanner temp; int[]list; String menu, outputString; int option = 1; boolean found = false; // Prompt the user to select an option menu = "\n\t1 Reads file" + "\n\t2 Finds a specific number in the list" + "\n\t3 Prints how many comparisons were needed" + "\n\t0 Quit\n\n\n"; System.out.println(menu); System.out.print("\tEnter your selection: "); option = scan.nextInt(); // Keep reading data until the user enters 0 while (option != 0) { switch (option) { case 1: readFile(); break; case 2: findKey(list,low,high,key); break; case 3: printCount(); break; default: outputString = "\nInvalid Selection\n"; System.out.println(outputString); break; }//end of switch System.out.println(menu); System.out.print("\tEnter your selection: "); option = scan.nextInt(); }//end of while }//end of main public static void readFile() { int i = 0; temp = new Scanner(new File("CS1302_Data7_2010.txt")); while(temp.hasNext()) { list[i]= temp.nextInt(); i++; }//end of while temp.close(); System.out.println("File Found..."); }//end of readFile() public static void findKey() { while(found!=true) { while(key < 100 || key > 999) { System.out.println("Please enter the number you would like to search for? ie 350: "); key = scan.nextInt(); }//end of inside while //base if (low <= high) { mid = ((low+high)/2); if (key == list[mid]) { found = true; compareCount++; }//end of inside if }//end of outside if else if (key < list[mid]) { compareCount++; high = mid-1; findKey(list,low,high,key); }//end of else if else { compareCount++; low = mid+1; findKey(list,low,high,key); }//end of else }//end of outside while }//end of findKey() public static void printCount() { System.out.println("Total number of comparisons is: " + compareCount); }//end of printCount }//end of class

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• Joystick input in Java

  - by typoknig

  Hi all, I am making a 2D game in Java and I want to use a joystick to control the movement of some crosshairs. Right now I have it so the mouse can control those crosshairs. My only criteria for this is that the control for the crosshair must stay in the game window unless a user clicks off into another window. Basically I want my game to capture whatever device is controlling the crosshairs much like a virtual machine captures a mouse. The joystick I am using (Thrustmaster Hotas Cougar) comes with some pretty advanced features, so that may make this easier (or harder). I have tried the solution listed on this page, but I am using a 64bit computer and for some reason it does not like that. I have also tried to use the key emulation feature of my joystick, but with little success. Here is what I have so far, any pointer would be appreciated. Main Class: import java.awt.Color; import java.awt.Cursor; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.awt.Graphics; import java.awt.Image; import java.awt.image.BufferStrategy; import java.awt.image.MemoryImageSource; import java.awt.Point; import java.awt.Toolkit; import javax.swing.JFrame; public class Game extends JFrame implements MouseMotionListener{ private int windowWidth = 1280; private int windowHeight = 1024; private Crosshair crosshair; public static void main(String[] args) { new Game(); } public Game() { this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setSize(windowWidth, windowHeight); this.setResizable(false); this.setLocation(0,0); this.setVisible(true); this.createBufferStrategy(2); addMouseMotionListener(this); initGame(); while(true) { long start = System.currentTimeMillis(); gameLoop(); while(System.currentTimeMillis()-start < 5) { //empty while loop } } } private void initGame() { hideCursor(); crosshair = new Crosshair (windowWidth/2, windowHeight/2); } private void gameLoop() { //game logic drawFrame(); } private void drawFrame() { BufferStrategy bf = this.getBufferStrategy(); Graphics g = (Graphics)bf.getDrawGraphics(); try { g = bf.getDrawGraphics(); Color darkBlue = new Color(0x010040); g.setColor(darkBlue); g.fillRect(0, 0, windowWidth, windowHeight); drawCrossHair(g); } finally { g.dispose(); } bf.show(); Toolkit.getDefaultToolkit().sync(); } private void drawCrossHair(Graphics g){ Color yellow = new Color (0xEDFF62); g.setColor(yellow); g.drawOval(crosshair.x, crosshair.y, 40, 40); g.fillArc(crosshair.x + 10, crosshair.y + 21 , 20, 20, -45, -90); g.fillArc(crosshair.x - 1, crosshair.y + 10, 20, 20, -135, -90); g.fillArc(crosshair.x + 10, crosshair.y - 1, 20, 20, -225, -90); g.fillArc(crosshair.x + 21, crosshair.y + 10, 20, 20, -315, -90); } @Override public void mouseDragged(MouseEvent e) { //empty method } @Override public void mouseMoved(MouseEvent e) { crosshair.x = e.getX(); crosshair.y = e.getY(); } private void hideCursor() { int[] pixels = new int[16 * 16]; Image image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(16, 16, pixels, 0, 16)); Cursor transparentCursor = Toolkit.getDefaultToolkit().createCustomCursor(image, new Point(0, 0), "invisiblecursor"); getContentPane().setCursor(transparentCursor); } } Another Class: public class Crosshair{ public int x; public int y; public Crosshair(int x, int y) { this.x = x; this.y = y; } }

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• PHP/Java bridge problem

  - by Jack

  I am using tomcat 6 on windows. Here is the code I am testing. import java.io.ByteArrayOutputStream; import java.io.Closeable; import java.io.StringReader; import javax.script.Invocable; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; /** * Create and run THREAD_COUNT PHP threads, concurrently accessing a * shared resource. * * Create 5 script engines, passing each a shared resource allocated * from Java. Each script engine has to implement Runnable. * * Java accesses the Runnable script engine using * scriptEngine.getInterface() and calls thread.start() to invoke each * PHP Runnable implementations concurrently. */ class PhpThreads { public static final String runnable = new String("<?php\n" + "function run() {\n" + " $out = java_context()->getAttribute('sharedResource', 100);\n" + " $nr = (string)java_context()->getAttribute('nr', 100);\n" + " echo \"started thread: $nr\n\";\n" + " for($i=0; $i<100; $i++) {\n" + " $out->write(ord($nr));\n" + " java('java.lang.Thread')->sleep(1);\n" + " }\n" + "}\n" + "?>\n"); static final int THREAD_COUNT = 5; public static void main(String[] args) throws Exception { ScriptEngineManager manager = new ScriptEngineManager(); Thread threads[] = new Thread[THREAD_COUNT]; ScriptEngine engines[] = new ScriptEngine[THREAD_COUNT]; ByteArrayOutputStream sharedResource = new ByteArrayOutputStream(); StringReader runnableReader = new StringReader(runnable); // create THREAD_COUNT PHP threads for (int i=0; i<THREAD_COUNT; i++) { engines[i] = manager.getEngineByName("php-invocable"); if (engines[i] == null) throw new NullPointerException ("php script engine not found"); engines[i].put("nr", new Integer(i+1)); engines[i].put("sharedResource", sharedResource); engines[i].eval(runnableReader); runnableReader.reset(); // cast the whole script to Runnable; note also getInterface(specificClosure, type) Runnable r = (Runnable) ((Invocable)engines[i]).getInterface(Runnable.class); threads[i] = new Thread(r); } // run the THREAD_COUNT PHP threads for (int i=0; i<THREAD_COUNT; i++) { threads[i].start(); } // wait for the THREAD_COUNT PHP threads to finish for (int i=0; i<THREAD_COUNT; i++) { threads[i].join(); ((Closeable)engines[i]).close(); } // print the output generated by the THREAD_COUNT concurrent threads String result = sharedResource.toString(); System.out.println(result); // Check result Object res=manager.getEngineByName("php").eval( "<?php " + "exit((int)('10011002100310041005'!=" + "@system(\"echo -n "+result+"|sed 's/./&\\\n/g'|sort|uniq -c|tr -d ' \\\n'\")));" + "?>"); System.exit(((Number)res).intValue()); } } I have added all the libraries. When I run the file I get the following error - run: Exception in thread "main" javax.script.ScriptException: java.io.IOException: Cannot run program "php-cgi": CreateProcess error=2, The system cannot find the file specified at php.java.script.InvocablePhpScriptEngine.eval(InvocablePhpScriptEngine.java:209) at php.java.script.SimplePhpScriptEngine.eval(SimplePhpScriptEngine.java:178) at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:232) at PhpThreads.main(NewClass.java:53) Caused by: java.io.IOException: Cannot run program "php-cgi": CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessBuilder.start(ProcessBuilder.java:459) at java.lang.Runtime.exec(Runtime.java:593) at php.java.bridge.Util$Process.start(Util.java:1064) at php.java.bridge.Util$ProcessWithErrorHandler.start(Util.java:1166) at php.java.bridge.Util$ProcessWithErrorHandler.start(Util.java:1217) at php.java.script.CGIRunner.doRun(CGIRunner.java:126) at php.java.script.HttpProxy.doRun(HttpProxy.java:63) at php.java.script.CGIRunner.run(CGIRunner.java:111) at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:60) Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.<init>(ProcessImpl.java:81) at java.lang.ProcessImpl.start(ProcessImpl.java:30) at java.lang.ProcessBuilder.start(ProcessBuilder.java:452) ... 8 more What am I missing?

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• How do I use Java to sort surnames in alphabetical order from file to file?

  - by user577939

  I have written this code and don't know how to sort surnames in alphabetical order from my file to another file. import java.io.*; import java.util.*; class Asmuo { String pavarde; String vardas; long buvLaikas; int atv1; int atv2; int atv3; } class Irasas { Asmuo duom; Irasas kitas; } class Sarasas { private Irasas p; Sarasas() { p = null; } Irasas itrauktiElementa(String pv, String v, long laikas, int d0, int d1, int d2) { String pvrd, vrd; int data0; int data1; int data2; long lks; lks = laikas; pvrd = pv; vrd = v; data0 = d0; data1 = d1; data2 = d2; Irasas r = new Irasas(); r.duom = new Asmuo(); uzpildymasDuomenimis(r, pvrd, vrd, lks, d0, d1, d2); r.kitas = p; p = r; return r; } void uzpildymasDuomenimis(Irasas r, String pv, String v, long laik, int d0, int d1, int d2) { r.duom.pavarde = pv; r.duom.vardas = v; r.duom.atv1 = d0; r.duom.buvLaikas = laik; r.duom.atv2 = d1; r.duom.atv3 = d2; } void spausdinti() { Irasas d = p; int i = 0; try { FileWriter fstream = new FileWriter("rez.txt"); BufferedWriter rez = new BufferedWriter(fstream); while (d != null) { System.out.println(d.duom.pavarde + " " + d.duom.vardas + " " + d.duom.buvLaikas + " " + d.duom.atv1 + " " + d.duom.atv2 + " " + d.duom.atv3); rez.write(d.duom.pavarde + " " + d.duom.vardas + " " + d.duom.buvLaikas + " " + d.duom.atv1 + " " + d.duom.atv2 + " " + d.duom.atv3 + "\n"); d = d.kitas; i++; } rez.close(); } catch (Exception e) { System.err.println("Error: " + e.getMessage()); } } } public class Gyventojai { public static void main(String args[]) { Sarasas sar = new Sarasas(); Calendar atv = Calendar.getInstance(); Calendar isv = Calendar.getInstance(); try { FileInputStream fstream = new FileInputStream("duom.txt"); DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String eil; while ((eil = br.readLine()) != null) { String[] cells = eil.split(" "); String pvrd = cells[0]; String vrd = cells[1]; atv.set(Integer.parseInt(cells[2]), Integer.parseInt(cells[3]), Integer.parseInt(cells[4])); isv.set(Integer.parseInt(cells[5]), Integer.parseInt(cells[6]), Integer.parseInt(cells[7])); long laik = (isv.getTimeInMillis() - atv.getTimeInMillis()) / (24 * 60 * 60 * 1000); int d0 = Integer.parseInt(cells[2]); int d1 = Integer.parseInt(cells[3]); int d2 = Integer.parseInt(cells[4]); sar.itrauktiElementa(pvrd, vrd, laik, d0, d1, d2); } in.close(); } catch (Exception e) { System.err.println("Error: " + e.getMessage()); } sar.spausdinti(); } }

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• Why does IHttpAsyncHandler leak memory under load?

  - by Anton

  I have noticed that the .NET IHttpAsyncHandler (and the IHttpHandler, to a lesser degree) leak memory when subjected to concurrent web requests. In my tests, the development web server (Cassini) jumps from 6MB memory to over 100MB, and once the test is finished, none of it is reclaimed. The problem can be reproduced easily. Create a new solution (LeakyHandler) with two projects: An ASP.NET web application (LeakyHandler.WebApp) A Console application (LeakyHandler.ConsoleApp) In LeakyHandler.WebApp: Create a class called TestHandler that implements IHttpAsyncHandler. In the request processing, do a brief Sleep and end the response. Add the HTTP handler to Web.config as test.ashx. In LeakyHandler.ConsoleApp: Generate a large number of HttpWebRequests to test.ashx and execute them asynchronously. As the number of HttpWebRequests (sampleSize) is increased, the memory leak is made more and more apparent. LeakyHandler.WebApp TestHandler.cs namespace LeakyHandler.WebApp { public class TestHandler : IHttpAsyncHandler { #region IHttpAsyncHandler Members private ProcessRequestDelegate Delegate { get; set; } public delegate void ProcessRequestDelegate(HttpContext context); public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData) { Delegate = ProcessRequest; return Delegate.BeginInvoke(context, cb, extraData); } public void EndProcessRequest(IAsyncResult result) { Delegate.EndInvoke(result); } #endregion #region IHttpHandler Members public bool IsReusable { get { return true; } } public void ProcessRequest(HttpContext context) { Thread.Sleep(10); context.Response.End(); } #endregion } } LeakyHandler.WebApp Web.config <?xml version="1.0"?> <configuration> <system.web> <compilation debug="false" /> <httpHandlers> <add verb="POST" path="test.ashx" type="LeakyHandler.WebApp.TestHandler" /> </httpHandlers> </system.web> </configuration> LeakyHandler.ConsoleApp Program.cs namespace LeakyHandler.ConsoleApp { class Program { private static int sampleSize = 10000; private static int startedCount = 0; private static int completedCount = 0; static void Main(string[] args) { Console.WriteLine("Press any key to start."); Console.ReadKey(); string url = "http://localhost:3000/test.ashx"; for (int i = 0; i < sampleSize; i++) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "POST"; request.BeginGetResponse(GetResponseCallback, request); Console.WriteLine("S: " + Interlocked.Increment(ref startedCount)); } Console.ReadKey(); } static void GetResponseCallback(IAsyncResult result) { HttpWebRequest request = (HttpWebRequest)result.AsyncState; HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(result); try { using (Stream stream = response.GetResponseStream()) { using (StreamReader streamReader = new StreamReader(stream)) { streamReader.ReadToEnd(); System.Console.WriteLine("C: " + Interlocked.Increment(ref completedCount)); } } response.Close(); } catch (Exception ex) { System.Console.WriteLine("Error processing response: " + ex.Message); } } } }

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• Real-time graphing in Java

  - by thodinc

  I have an application which updates a variable about between 5 to 50 times a second and I am looking for some way of drawing a continuous XY plot of this change in real-time. Though JFreeChart is not recommended for such a high update rate, many users still say that it works for them. I've tried using this demo and modified it to display a random variable, but it seems to use up 100% CPU usage all the time. Even if I ignore that, I do not want to be restricted to JFreeChart's ui class for constructing forms (though I'm not sure what its capabilities are exactly). Would it be possible to integrate it with Java's "forms" and drop-down menus? (as are available in VB) Otherwise, are there any alternatives I could look into? EDIT: I'm new to Swing, so I've put together a code just to test the functionality of JFreeChart with it (while avoiding the use of the ApplicationFrame class of JFree since I'm not sure how that will work with Swing's combo boxes and buttons). Right now, the graph is being updated immediately and CPU usage is high. Would it be possible to buffer the value with new Millisecond() and update it maybe twice a second? Also, can I add other components to the rest of the JFrame without disrupting JFreeChart? How would I do that? frame.getContentPane().add(new Button("Click")) seems to overwrite the graph. package graphtest; import java.util.Random; import javax.swing.JFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.data.time.Millisecond; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; public class Main { static TimeSeries ts = new TimeSeries("data", Millisecond.class); public static void main(String[] args) throws InterruptedException { gen myGen = new gen(); new Thread(myGen).start(); TimeSeriesCollection dataset = new TimeSeriesCollection(ts); JFreeChart chart = ChartFactory.createTimeSeriesChart( "GraphTest", "Time", "Value", dataset, true, true, false ); final XYPlot plot = chart.getXYPlot(); ValueAxis axis = plot.getDomainAxis(); axis.setAutoRange(true); axis.setFixedAutoRange(60000.0); JFrame frame = new JFrame("GraphTest"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ChartPanel label = new ChartPanel(chart); frame.getContentPane().add(label); //Suppose I add combo boxes and buttons here later frame.pack(); frame.setVisible(true); } static class gen implements Runnable { private Random randGen = new Random(); public void run() { while(true) { int num = randGen.nextInt(1000); System.out.println(num); ts.addOrUpdate(new Millisecond(), num); try { Thread.sleep(20); } catch (InterruptedException ex) { System.out.println(ex); } } } } }

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