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  • How can I add similar functionality to a number of methods in java?

    - by Roman
    I have a lot of methods for logging, like logSomeAction, logAnotherAction etc. Now I want all these methods make a small pause after printing messages (Thread.sleep). If I do it manually, I would do something like this: //before: public static void logSomeAction () { System.out.println (msg(SOME_ACTION)); } //after: public static void logSomeAction () { System.out.println (msg(SOME_ACTION)); try { Thread.sleep (2000); } catch (InterruptedException ignored) { } } I remember that Java has proxy classes and some other magic-making tools. Is there any way avoid copy-n-pasting N sleep-blocks to N logging methods?

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  • Strange result of highchart

    - by user1612334
    I use http://highcharts.com and there is really strange result. So, my data looks like: Value | Date 1507 2013-02-03 734 2013-02-02 0 2013-02-01 225 2013-01-31 *Graphic miss* 672 2013-01-30 *Graphic miss* 692 2013-01-29 *Graphic miss* <--- This value gone to 1 february 910 2013-01-28 314 2013-01-27 I miss three days (29 January, 30, 31). When i get data from database, i convert it so: var lines = []; try { jQuery.each(data, function(i, line) { var dateArr = line.date.split('-'); lines.push([ Date.UTC(dateArr[0],dateArr[1],dateArr[2]), parseInt(line.num_chips) ]); }); } catch(e) { } Why could it be so? =\

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  • Line by line image swing

    - by user1046017
    I want to show an image as it is downloading, I have the URL, and I am trying to get the image parts like this: InputStream openStream = url.openStream(); DataInputStream dis = new DataInputStream(new BufferedInputStream(openStream)); ByteArrayOutputStream os = new ByteArrayOutputStream(); while ((s = dis.read(b)) != -1) { os.write(b , 0, s); support.firePropertyChange("stream", null, os); } This way, any listener get the stream and creates an image, this way: if("stream".equals(evt.getPropertyName())){ try { ByteArrayOutputStream stream = (ByteArrayOutputStream) evt.getNewValue(); byte[] byteArray = stream.toByteArray(); stream.flush(); Image createImage = Toolkit.getDefaultToolkit().createImage(byteArray); this.getContentPane().add(new JLabel(new ImageIcon(createImage))); } catch (IOException ex) { Logger.getLogger(ImageTest.class.getName()).log(Level.SEVERE, null, ex); } } However, I am getting a "Premature end of JPEG file sun.awt.image.ImageFormatException: JPEG datastream contains no image" error, the image is a JPG image format, is there any library or method known to make something similar?

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  • Check if NFS share is mounted in python script

    - by Fabian
    I wrote a python script that depends on a certain NFS share to be available. If the NFS share is not mounted it will happily copy the files to the local path where it should be mounted, but fail later when it tries to copy some files back that were created on the NFS server. I'd like to catch this error specifically so I can print a useful error message that will tell the users of this script what they have to do. My first idea would be to execute mount using subprocess and then check the output for this nfs share. But I'm wondering if there isn't a nicer and more robust method of doing it.

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  • Calling ASP.NET web service function via GET method with jQuery

    - by the_V
    Hi, I'm trying to call web service function via GET method using jQuery, but having a problem. This is a web service code: [WebService(Namespace = "http://something.com/samples")] [ScriptService] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class TestWebService : System.Web.Services.WebService { [WebMethod] public string Test2() { string result = null; try { result = "{'result':'success', 'datetime':'" + DateTime.Now.ToString() + "'"; } catch (Exception ex) { result = "Something wrong happened"; } return result; } } That's the way I call the function: $.ajax({ type: "GET", url: "http://localhost/testwebsite/TestWebService.asmx/Test2", data: "{}", contentType: "application/json", dataType: "json", error: function (xhr, status, error) { alert(xhr.responseText); }, success: function (msg) { alert('Call was successful!'); } }); Method is called successfully, but result string gets covered by XML tags, like this: <string> {'result':'success', 'datetime':'4/26/2010 12:11:18 PM' </string> And I get an error because of this (error handler is called). Does anybody know what can be done about this?

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  • Java process problem in Eclipse

    - by Norbi
    Hi! This is my code: final String run_tool ="cmd.exe /C pelda.exe"; final Process tool_proc = null; Runnable doRun = new Runnable() { public void run() { try { tool_proc = Runtime.getRuntime().exec(run_tool); } catch (IOException e) { e.printStackTrace(); } } }; Thread th = new Thread(doRun); th.start(); InputStream toolstr = tool_proc.getInputStream(); After the eclipse gives this warning message fot the tool_proc variable: The final local variable tool_proc cannot be assigned, since it is defined in an enclosing type I dont't know why my code doesn't work please help me

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  • What's the equivalent in C# of this VB code on an Outlook form?

    - by wes
    Basically, how do I link an Outlook form and a C# back end? In VB you can write on the form Sub ButtonName_Click() Dim Recipients With Item.GetInspector.ModifiedFormPages("Message") Set Recipients = .Controls("To") End With End Sub which will fire whenever the button named "ButtonName" on the form is clicked and will set the variable Recipients to a string of whatever is in the To text box. Now I have a custom form, and I have a VS C# Outlook Add-in, and they're two separate things. I've got an event handler that can catch MailItem objects, but I don't know how to handle custom form button clicks or even how to access elements on the form. EDIT - Just to clarify, the custom form was created in Outlook and then its .ofs was imported into VS. Both Outlook and VS are 2010.

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  • Attempted to perform an unauthorized operation

    - by Lefteris Gkinis
    Now I use the following code: Public Function SetACL(ByVal filename As String, ByVal account As String, ByVal sender As Object, ByVal e As System.EventArgs) As Boolean Try Dim rule As FileSystemAccessRule = New FileSystemAccessRule(account, FileSystemRights.Write, AccessControlType.Allow) Dim fp As PermissionSet = New PermissionSet(Permissions.PermissionState.Unrestricted) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.Read, filename)) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.Write, filename)) fp.AddPermission(New FileIOPermission(FileIOPermissionAccess.PathDiscovery, filename)) fp.Assert() Dim di As DirectoryInfo = New DirectoryInfo(Path.GetDirectoryName(filename)) SetACL = False Dim security As DirectorySecurity = di.GetAccessControl(AccessControlSections.Access) security.ModifyAccessRule(AccessControlModification.Add, rule, SetACL) di.SetAccessControl(security) Return SetACL Catch ex As Exception MessageBox.Show(ex.Message, "Set Security Sub", MessageBoxButtons.OK, MessageBoxIcon.Stop) Finalize() End Try End Function The Error of 'Attempted to perform an unauthorized operation' comes when i'm trying to execute the instraction Dim security As DirectorySecurity = di.GetAccessControl(AccessControlSections.Access) Please if anybody knows why that error comes here to respond

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  • Prepared statement initialized tiwice and closed once

    - by sonam
    Hi, I want to know that if a PreparedStatement object is initialized twice the way shown in code snippet below and closed only once in finally block, will it fail to close? I am not getting any error in this code but will it be a better idea to use 2 different preparedStatements instead of one. I think it fails to close the preparedStatement at #1. Connection conn = null; PreparedStatement ps = null; try { conn = getConnection(); ps = conn.prepareStatement(QueryUtil.UPDATE_POLICY_DETAILS); // #1 ps.setInt(1, iCancellationPolicyId); ps.executeUpdate(); //some code here ps = conn.prepareStatement(QueryUtil.UPDATE_POLICY_CHARGES); // #2 ps.setInt(1, iCancellationPolicyId); ps.executeUpdate(); //some code here } catch (SQLException sqlExp) { sqlExp.printStackTrace(); LOG.fatal(sqlExp); } finally { conn.close(); ps.close(); }

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  • Is the "message" of an exception culturally independent?

    - by Ray Hayes
    In an application I'm developing, I have the need to handle a socket-timeout differently from a general socket exception. The problem is that many different issues result in a SocketException and I need to know what the cause was. There is no inner exception reported, so the only information I have to work with is the message: "A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond" This question has a general and specific part: is it acceptable to write conditional logic based upon the textual representation of an exception? Is there a way to avoid needing exception handling? Example code below... try { IPEndPoint endPoint = null; client.Client.ReceiveTimeout = 1000; bytes = client.Receive(ref endPoint); } catch( SocketException se ) { if ( se.Message.Contains("did not properly respond after a period of time") ) { // Handle timeout differently.. } }

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  • Java Custom exception throw behaves differently between different Projects

    - by Pablo
    I am attempting to call the following in my code: public void checkParticleLightRestriction(Particle parent) throws LightException { if ( parent == null ) { throw new LightException("quantum-particle-restrict.23", this); } In one Project the exception is thrown and the effect is similar to calling "return" whereby I am returned back to the point immediately succeeding where this method was called. However in another Project I get thrown completed out of the current package and to a point way prior to the point preceeding this method. It likes instead of being kicked out of a bar I am being deported all the way out of the country. My option are the wrap the throw in a try / catch but I am wondering why this difference in behaviour beween the 2 projects ?

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  • Can Spring access-denied-handler refer to popup?

    - by Rens Groenveld
    I am working with Spring Security 3.1.x and have implemented method annotation securities. As I want, when I perform a certain action while being logged in as a used that doesn't have the rights, I get a 403 acces is denied in my console! Perfect! Now I would like to catch this 403, and give the user a popup with a custom message. I don't want to redirect users to a page saying that they have no rights. Is there any way the access-denied-handler of Spring can take care of a popup? Or can it only redirect to another page? Maybe there are other options for me? Thanks in advance!

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  • Is there a faster way to download a page from the net to a string?

    - by cphil5
    I have tried other methods to download info from a URL, but needed a faster one. I need to download and parse about 250 separate pages, and would like the app to not appear ridiculously slow. This is the code I am currently using to retrieve a single page, any insight would be great. try { URL myURL = new URL("http://www.google.com"); URLConnection ucon = myURL.openConnection(); InputStream inputStream = ucon.getInputStream(); BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); ByteArrayBuffer byteArrayBuffer = new ByteArrayBuffer(50); int current = 0; while ((current = bufferedInputStream.read()) != -1) { byteArrayBuffer.append((byte) current); } tempString = new String(byteArrayBuffer.toByteArray()); } catch (Exception e) { Log.i("Error",e.toString()); }

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  • Validating IPv4 string in Java

    - by Mat Banik
    Bellow method is validating if string is correct IPv4 address it returns true if it is valid. Any improvements in regex and elegance would be very appreciated: public static boolean validIP(String ip) { if (ip == null || ip.isEmpty()) return false; ip = ip.trim(); if ((ip.length() < 8) & (ip.length() > 15)) return false; try { Pattern pattern = Pattern.compile("^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"); Matcher matcher = pattern.matcher(ip); return matcher.matches(); } catch (PatternSyntaxException ex) { return false; } }

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  • How to use the boost lexical_cast library for just for checking input

    - by Inverse
    I use the boost lexical_cast library for parsing text data into numeric values quite often. In several situations however, I only need to check if values are numeric; I don't actually need or use the conversion. So, I was thinking about writing a simple function to test if a string is a double: template<typename T> bool is_double(const T& s) { try { boost::lexical_cast<double>(s); return true; } catch (...) { return false; } } My question is, are there any optimizing compilers that would drop out the lexical_cast here since I never actually use the value? Is there a better technique to use the lexical_cast library to perform input checking?

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  • android detect is gyroscope available

    - by Tan Jit Ren
    How can I detect whether the android device has gyroscope? Currently I'm using the following method to detect whether gyroscope is available. If gyroscope not available, then use accelerometer. SensorManager mgr = (SensorManager) getSystemService(SENSOR_SERVICE); List<Sensor> sensors = mgr.getSensorList(Sensor.TYPE_ALL); for (Sensor sensor : sensors) { Log.i("sensors",sensor.getName()); if(sensor.getName().contains("Gyroscope")){ try{ mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR), SensorManager.SENSOR_DELAY_FASTEST); return; }catch(Exception e){ } } } mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_FASTEST); However some of my app users complaint they can't use gyroscope. Is there any problem with the code?

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  • Java String to SHA1

    - by AeroDroid
    I'm trying to make a simple String to SHA1 converter in Java and this is what I've got... public static String toSHA1(byte[] convertme) { MessageDigest md = null; try { md = MessageDigest.getInstance("SHA-1"); } catch(NoSuchAlgorithmException e) { e.printStackTrace(); } return new String(md.digest(convertme)); } When I pass it toSHA1("password".getBytes()), I get "[?a?????%l?3~??." I know it's probably a simple encoding fix like UTF-8, but could someone tell me what I should do to get what I want which is "5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8"? Or am I doing this completely wrong? Thanks a lot!

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  • Refactoring common method header and footer

    - by David Wong
    I have the following chunk of header and footer code appearing in alot of methods. Is there a cleaner way of implementing this? Session sess = factory.openSession(); Transaction tx; try { tx = sess.beginTransaction(); //do some work ... tx.commit(); } catch (Exception e) { if (tx!=null) tx.rollback(); throw e; } finally { sess.close(); } The class in question is actually an EJB 2.0 SessionBean which looks like: public class PersonManagerBean implements SessionBean { public void addPerson(String name) { // boilerplate // dostuff // boilerplate } public void deletePerson(Long id) { // boilerplate // dostuff // boilerplate } }

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  • How to find the entity with the greatest primary key?

    - by simpatico
    I've an entity LearningUnit that has an int primary key. Actually, it has nothing more. Entity Concept has the following relationship with it: @ManyToOne @Size(min=1,max=7) private LearningUnit learningUnit; In a constructor of Concept I need to retrieve the LearningUnit with the greatest primary key. If no LearningUnit exists yet I instantiate one. I then set this.learningUnit to the retrieved/instantied. Finally, I call the empty constructor of Concept in a try-catch block, to have the entitymanager do the cardinality check. If an exception is thrown (I expect one in the case that already another 7 Concepts are referring to the same LearningUnit. In that case, I case instantiate a new LearningUnit with a new greater primary key. Please, also point out, if any, clear pitfalls in my outlined algorithm above.

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  • Recieveing "EXC_BAD_ACCESS" before any UI elements load (on device only)

    - by morgancodes
    Everything works fine on the simulator, but I gete EXC_BAD_ACCESS when I try to load my app on the device. I've put in a bunch of NSLogs to try and catch where it happens, but the log statements are never reached. Also, the UI doesn't load. So, seems the problem is happening before any of my code is reached. I tried a clean build, no luck. Also tried building and installing a different app, which works fine. So, looks like there's something wrong with my app, but it's something that happens before any of my code gets called. So, any ideas?

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  • Will this make the object thread-safe?

    - by sharptooth
    I have a native Visual C++ COM object and I need to make it completely thread-safe to be able to legally mark it as "free-threaded" in th system registry. Specifically I need to make sure that no more than one thread ever accesses any member variable of the object simultaneously. The catch is I'm almost sure that no sane consumer of my COM object will ever try to simultaneously use the object from more than one thread. So I want the solution as simple as possible as long as it meets the requirement above. Here's what I came up with. I add a mutex or critical section as a member variable of the object. Every COM-exposed method will acquire the mutex/section at the beginning and release before returning control. I understand that this solution doesn't provide fine-grained access and this might slow execution down, but since I suppose simultaneous access will not really occur I don't care of this. Will this solution suffice? Is there a simpler solution?

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  • List of items with same values

    - by user559780
    I'm creating a list of items from a file BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("H:/temp/data.csv"))); try { List<Item> items = new ArrayList<Item>(); Item item = new Item(); String line = null; while ((line = reader.readLine()) != null) { String[] split = line.split(","); item.name = split[0]; item.quantity = Integer.valueOf(split[1]); item.price = Double.valueOf(split[2]); item.total = item.quantity * item.price; items.add(item); } for (Item item2 : items) { System.out.println("Item: " + item2.name); } } catch (IOException e) { reader.close(); e.printStackTrace(); } Problem is the list is displaying the last line in the file as the value for all items.

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  • In query in Entity Frame work

    - by Syed Salman Raza Zaidi
    I am working on Entity frame work, i have created a method which is returning List of my Table, I am retrieving data on base of grpID(which is foreign key, so i can have multiple records) I have saved these grpID's in an array so I want to run IN command on Entity framework so that i can get records in single List, How can i apply In command,my code is below public List<tblResource> GetResources(long[] grpid) { try { return dataContext.tblResource.Where(c => c.GroupId == grpid && c.IsActive == true).ToList();//This code is not working as i am having array of groupIds } catch (Exception ex) { return ex; } }

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  • Where to add an observer to the NotificationCenter in a UITableViewController

    - by Saifis
    I want to send a notification from a UITableViewController-A to UITableViewController-B. I was adding the observer in the initwithCoder of the UITableViewController that is supposed to catch the notifications. The classes are correlated as folows RootViewController ===NavigationController-A =====UITableViewController-A ===NavigationController-B =====UITableViewController-B I need to add the observer before the views are actually loaded because notifications may be sent before the view is called. However I have been told that initializing in the initWithCoder method in a UIViewController is not advisable, and was told to add the observer in the AppDelegate. Are there any other suggestions for doing this?

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  • JSP: I am doing an application in which i have to download ppt file .

    - by Sanjeev
    I am doing an application in which i have to download ppt file using a jsp page. I am using The following code but its not working <% try { String filename = "file/abc.ppt"; // set the http content type to "APPLICATION/OCTET-STREAM response.setContentType("APPLICATION/OCTET-STREAM"); // initialize the http content-disposition header to // indicate a file attachment with the default filename // "myFile.txt" String disHeader = "Attachment Filename=\"abc.ppt\""; response.setHeader("Content-Disposition", disHeader); // transfer the file byte-by-byte to the response object File fileToDownload = new File(filename); FileInputStream fileInputStream = new FileInputStream(fileToDownload); int i; while ((i=fileInputStream.read())!=-1) { out.write(i); } fileInputStream.close(); out.close(); }catch(Exception e) // file IO errors { e.printStackTrace(); } % can anybody solve this problem...........

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