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  • Java Google App Engine Datastore: 'IN' operator available on JDO query filters, as with Python?

    - by Jim Blackler
    This page describes an 'IN' operator that can be used in GAE Datastore to compare a field against a list of possible matches, not just a single value: However this is for Python. In Java (App Engine 1.2.5), trying query.setFilter("someField IN param"); on my javax.jdo.query fires a JDOUserException 'Portion of expression could not be parsed: IN param'. Is there a way this can be done?

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  • How Can I create different selectors for accepting new connection in java NIO

    - by Deepak
    I want to write java tcp socket programming using java NIO. Its working fine. But I am using the same selector for accepting reading from and writing to the clients. How Can I create different selectors for accepting new connection in java NIO, reading and writing. Is there any online help. Actually when I am busy in reading or writing my selector uses more iterator. So If more number of clients are connected then performance of accepting new coneection became slow. But I donot want the accepting clients to be slow // Create a selector and register two socket channels Selector selector = null; try { // Create the selector selector = Selector.open(); // Create two non-blocking sockets. This method is implemented in // e173 Creating a Non-Blocking Socket. SocketChannel sChannel1 = createSocketChannel("hostname.com", 80); SocketChannel sChannel2 = createSocketChannel("hostname.com", 80); // Register the channel with selector, listening for all events sChannel1.register(selector, sChannel1.validOps()); sChannel2.register(selector, sChannel1.validOps()); } catch (IOException e) { } // Wait for events while (true) { try { // Wait for an event selector.select(); } catch (IOException e) { // Handle error with selector break; } // Get list of selection keys with pending events Iterator it = selector.selectedKeys().iterator(); // Process each key at a time while (it.hasNext()) { // Get the selection key SelectionKey selKey = (SelectionKey)it.next(); // Remove it from the list to indicate that it is being processed it.remove(); try { processSelectionKey(selKey); } catch (IOException e) { // Handle error with channel and unregister selKey.cancel(); } } } public void processSelectionKey(SelectionKey selKey) throws IOException { // Since the ready operations are cumulative, // need to check readiness for each operation if (selKey.isValid() && selKey.isConnectable()) { // Get channel with connection request SocketChannel sChannel = (SocketChannel)selKey.channel(); boolean success = sChannel.finishConnect(); if (!success) { // An error occurred; handle it // Unregister the channel with this selector selKey.cancel(); } } if (selKey.isValid() && selKey.isReadable()) { // Get channel with bytes to read SocketChannel sChannel = (SocketChannel)selKey.channel(); // See e174 Reading from a SocketChannel } if (selKey.isValid() && selKey.isWritable()) { // Get channel that's ready for more bytes SocketChannel sChannel = (SocketChannel)selKey.channel(); } } Thanks Deepak

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  • AddThis share button wont work in DotNetNuke

    - by soldieraman
    For some reason when I add a HTML module (well the default module added to DNN 5.4) and then add the "AddThis" javascript. While the button shows up clicking on it opens up a new page rather than showing an iframe modal message or on hover a list of popular social media networks to share the page with. Wonder what would be the easiest way to resolve this and why this happens?

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  • Use of FTP "append" command

    - by sahs
    I want to upload a file to a ftp server programmatically (C++). If the connection is lost while uploading a file, I wouldn't want to upload the file from scratch, but to upload only the part that I haven't sent. Does the APPE command fulfill my demand? What list of FTP commands should I use exactly? And how?

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  • input type="text" not clickable in a jcarousel (jQuery based carousel) element

    - by AkaiKen
    Hello ! I work on a website where almost all objects are in a jCarousel element : <div> <ul id="mycarousel"> <li>object 1</li> <li>object 2</li> </ul> </div> is the "written" code, and : <div class=" jcarousel-skin-tango"> <div class="jcarousel-container jcarousel-container-horizontal" style="display: block;"> <div class="jcarousel-prev jcarousel-prev-horizontal jcarousel-prev-disabled jcarousel-prev-disabled-horizontal" style="display: block;" disabled="true"></div> <div class="jcarousel-next jcarousel-next-horizontal" style="display: block;" disabled="false"></div> <div class="jcarousel-clip jcarousel-clip-horizontal"> <ul class=" jcarousel-list jcarousel-list-horizontal" id="mycarousel" style="width: 2853px; left: 0px;"> <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-1 jcarousel-item-1-horizontal" jcarouselindex="1" style="width: 307px;"> object 1 </li> <li class="jcarousel-item jcarousel-item-horizontal jcarousel-item-1 jcarousel-item-1-horizontal" jcarouselindex="1" style="width: 307px;"> object 2 </li> </ul> </div> </div> is the generated code (here it lacks the ultimate </div>, maybe a number of rows limitation ?). I'm sorry I can't provide a link, I work on a local server currently. It works perfectly =) but... my problem is : an <input type="text" /> won't be clickable in this environment. I tried the others type of input, radio, checkbox, file : works. But text does not. I can specify a value on my input (it's its purpose on my work : a search in a database for datas to be modified and reinjected in database). In fact, I can access to the text input by clicking-right in then left. But it's pretty 'unergonomic', and in my project it's unthinkable. Ah, and I tried to style this input with a style="z-index:1000;", no changes, I think it's not a CSS problem. Does anybody have an idea ? Thank you very much in advance.

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  • Pointer-Safe Objects?

    - by cam
    Would it be smart to have a vector in an object with a list of pointers that point to it? This way when the object is deleted, it could delete all the pointers pointing to it to prevent a null-pointer exception?

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  • Practical Uses of Fractals in Programming

    - by Sami
    Fractals have always been a bit of a mystery for me. What practical uses (beyond rendering to beautiful images) are there for fractals in the various programming problem domains? And please, don't just list areas that use them. I'm interested in specific algorithms and how fractals are used with those algorithms to solve something in practice. Please at least give a short description of the algorithm.

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  • Managing IIS through Delphi code.

    - by Roman Prikhodchenko
    Hi! I'm developing an Inno Setup installer and I need to manage an IIS server from my delphi code. I've googled how to add/remove ISAPI filters and how to create a virtual folder. However, I still need to be able to add/remove/list ISAPI extensions and create/remove websites. So my question is how can I do that?

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  • creating executable jar file for my java application

    - by Manu
    public class createExcel { public void write() throws IOException, WriteException { WorkbookSettings wbSettings = new WorkbookSettings(); wbSettings.setLocale(new Locale("en", "EN")); WritableWorkbook workbook1 =Workbook.createWorkbook(new File(file), wbSettings); workbook1.createSheet("Niru ", 0); WritableSheet excelSheet = workbook1.getSheet(0); createLabel(excelSheet); createContent(excelSheet,list); workbook1.write(); workbook1.close(); } public void createLabel(WritableSheet sheet)throws WriteException { WritableFont times10pt = new WritableFont(WritableFont.createFont("D:\font\trebuct"),8); // Define the cell format times = new WritableCellFormat(times10pt); // Lets automatically wrap the cells times.setWrap(false); WritableFont times10ptBoldUnderline = new WritableFont( WritableFont.createFont("D:\font\trebuct"), 9, WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE); timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline); sheet.setColumnView(0,15); sheet.setColumnView(1,13); // Write a few headers addCaption(sheet, 0, 0, "Business Date"); addCaption(sheet, 1, 0, "Dealer ID"); } private void createContent(WritableSheet sheet, ArrayList list) throws WriteException,RowsExceededException { // Write a few number for (int i = 1; i < 11; i++) { for(int j=0;j<11;j++){ // First column addNumber(sheet, i, j,1); // Second column addNumber(sheet, 1, i, i * i); } } } private void addCaption(WritableSheet sheet, int column, int row, String s) throws RowsExceededException, WriteException { Label label; label = new Label(column, row, s, timesBoldUnderline); sheet.addCell(label); } private void addNumber(WritableSheet sheet, int row,int column, Integer integer) throws WriteException, RowsExceededException { Number number; number = new Number(column,row, integer, times); sheet.addCell(number); } public static void main(String[] args) { JButton myButton0 = new JButton("Advice_Report"); JButton myButton1 = new JButton("Position_Report"); JPanel bottomPanel = new JPanel(); bottomPanel.add(myButton0); bottomPanel.add(myButton1); myButton0.addActionListener(this); myButton1.addActionListener(this); createExcel obj=new createExcel(); obj.setOutputFile("c;\\temp\\swings\\jack.xls"); try{ obj.write(); }catch(Exception e){} } and so on. it working fine. i have jxl.jar and ojdbc14.jar files(need this jar file for Excelsheet creation and DB connection )and createExcel.class(.class file) file. how to make this code as executable jar file.

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  • How to select and AMI when creating an instance of EC2

    - by Prashant
    I am using Amazon EC2 for the first time, and need to create an instance that runs Windows, MSSQL Server 2008, .Net Framework 3.5 SP1 and IIS Server 6.0. I am unable to decide what AMI (out of the huge list of community AMIs) should I choose to meet my requirements. Is there a way I can make this decision without doing trial and error.

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  • how to add folder to a listbox in .net?

    - by shruti
    i have a list box and i want to add a folder/directory to that which is at the specified location i have used the code string path = "E:\\shruti\\MyDir"; DirectoryItem folder = new DirectoryItem(path); lstBurnItems.Items.Add(folder); //add folder to listbox but its not working fine... what should i do to get success??

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  • How do you set the initial value for a ManyToMany field in django?

    - by mlissner
    I am using a ModelForm to create a form, and I have gotten the initial values set for every field in the form except for the one that is a ManyToMany field. I understand that I need to give it a list, but I can't get it to work. My code right now is roughly: contacts = userProfile.contact.all() initial = {'contacts': contacts} But that doesn't work. Am I missing something here?

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  • CakePHP Multiple Nested Joins

    - by Paul
    I have an App in which several of the models are linked by hasMany/belongsTo associations. So for instance, A hasMany B, B hasMany C, C hasMany D, and D hasMany E. Also, E belongs to D, D belongs to C, C belongs to B, and B belongs to A. Using the Containable behavior has been great for controlling the amount of information comes back with each query, but I seem to be having a problem when trying to get data from table A while using a condition that involves table D. For instance, here is an example of my 'A' model: class A extends AppModel { var $name = 'A'; var $hasMany = array( 'B' => array('dependent' => true) ); function findDependentOnE($condition) { return $this->find('all', array( 'contain' => array( 'B' => array( 'C' => array( 'D' => array( 'E' => array( 'conditions' => array( 'E.myfield' => $some_value ) ) ) ) ) ) )); } } This still gives me back all the records in 'A', and if it's related 'E' records don't satisfy the condition, then I just get this: Array( [0] => array( [A] => array( [field1] => // stuff [field2] => // more stuff // ...etc ), [B] => array( [field1] => // stuff [field2] => // more stuff // ...etc ), [C] => array( [field1] => // stuff [field2] => // more stuff // ...etc ), [D] => array( [field1] => // stuff [field2] => // more stuff // ...etc ), [E] => array( // empty if 'E.myfield' != $some_value' ) ), [1] => array( // ...etc ) ) When If 'E.myfield' != $some_value, I don't want the record returned at all. I hope this expresses my problem clearly enough... Basically, I want the following query, but in a database-agnostic/CakePHP-y kind of way: SELECT * FROM A INNER JOIN (B INNER JOIN (C INNER JOIN (D INNER JOIN E ON D.id=E.d_id) ON C.id=D.c_id) ON B.id=C.b_id) ON A.id=B.a_id WHERE E.myfield = $some_value

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  • How can I dump my SQL Server Database Schema to a human readable & printable format?

    - by Kyle West
    I want to generate something like the following: LineItems Id ItemId OrderId Price Orders Id CustomerId DateCreated Customers Id FirstName LastName Email I don't need all the relationships, the diagram that will never print correctly, the metadata, anything. Just a list of the tables and their columns in a simple text format. Has anyone done this before? Is there a simple solution? Thanks, Kyle

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  • MySQL table organization and optimization (Rails)

    - by aguynamedloren
    I've been learning Ruby on Rails over the past few months with no prior programming experience. Lately, I've been thinking about database optimization and table organization. I know there are great books on the subject, but I typically learn by example / as I go. Here's a hypothetical situation: Let's say I am building a social network for a niche community with 250,000 members (users). The users have the ability to attend events. Let's say there are 50,000 past/present/future events. Much like Facebook events, a user can attend any number of events and an event can have any number of attendees. In the database, there would be a table for users and a table for events. Somehow I would have to create an association between the users and events. I could create an "events" column in the users table such that each user row would contain a hash of event IDs, or I could create an "attendees" column in the events table such that each event row would contain a hash of user IDs. Neither of these solutions seem ideal, however. On a users profile page, I want to display the list of events they are associated with, which would require scanning the 50,000 event rows for the user ID of said user if I include an "attendees" column in the events table. Likewise, on an event page, I want to display a list of attendees for the event, which would require scanning the 250,000 user rows for the event ID of said event if I include an "events" column in the users table. Option 3 would be to create a third table that contains the attendee information for each and every event - but I don't see how this would solve any problems. Are these non-issues? Rails makes accessing all of this information easy, but I guess I'm worried about scale. It is entirely possible that I am under-estimating the speed and processing power of modern databases / servers / etc. How long would it take to scan 250,000 user rows for specific event IDs - 10ms? 100ms? 1,000ms? I guess that's not that bad. Am I just over-thinking this?

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  • Most useful jQuery plugins

    - by Binoj Antony
    Which are the most useful jQuery plugins you have used. List out one per answer(to rank the best plugins individually), and describe what it does as well. BlockUI - Can block certain elements (or the whole page) during ajax requests. Form Plugin JQueryUI JQuery Validation TableSorter Taconite

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