19 Discussion / Question Topics
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| | I was following along to the following tutorial - [Derek Banas Java tutorial 18 - Threads pt2](http://www.youtube.com/watch?v=G2Xd5avyk_0) and as I decided to go over his tutorial series by following along in notepad++ and compiling with the command line, so that I can experiment and test things I'm unsure about, I … |
 | Quick question, the answer is eluding me on the internet. Which is unusual. When we reference and call a sub/function from a class is it automatically started on a new thread or will it join the main thread? Cheers in advance.  |
| | Hi, I have learned that servlet containers like tomcat handle concurrency in web application. I just want to get a clear comfirmation whether I dont have to multithread my business logic classes/methods(e.g database connections) when I am developing servlet applications. Cheers! |
| | I have a program with DataGridView which is bound to MS Access table. When I addept to update I get "Syntax error in INSERT INTO", but no explanation about the syntax error. Column names in the table have a space in them, such as "Last Name". Could that be the … |
| | I see this example frequently and thought I'd give it a shot but I've got something unexpected happening with my Queue. I have multiple threads utilizing my producer class but the output doesn't show that it is being written to by each thread. protected Queue<ProductMessage> prodQueue = new ConcurrentLinkedQueue<>(); @Override …  |
| | Hello all I am writing a solicitor allocation application that will be used by multiple users at one time. Because of this, the database needs to be updated with every change. This is my code when a solicitor is chosen for allocation: private void FindSolicitor(int type, bool stype) { table … |
| | public class Thread7 implements Runnable { public static void main(String r[]) { Thread t = new Thread(new Thread7()); t.start(); public void run() { System.out.println("C"); System.out.println("D"); } System.out.println("A"); try { t.join(); System.out.println("B"); } catch(Exception e){} } } Query1: On compiling this program I get "illegal start of expression" error pointing to … |
| | Hey Guys i am doing a small project and i am using vb.net with MS access database. i am facing a Concurrency issue sometimes when i try to save data in the datagried view. i have added the datagried view by draging and drop the table from the data source. … |
| | Hey Guys i am doing a small project and i am using vb.net with MS access database. i am facing a Concurrency issue sometimes when i try to save data in the datagried view. i have added the datagried view by draging and drop the table from the data source. … |
| | hi, how can i pervent from crontab concurrent run ??? thats mean when my crontab Take too long , with this crontab another crontab not runs... please help me ... best regards, amir  |
| | My understanding of this subject is - Two or more processes accessing a semaphore concurrently can cause Deadlock The provelms with semaphores is that you can forget to call the release method and it can cause deadlock Starvation Both processes can change the P and V counters of the semaphore … |
| | Hello, I've got a problem with simultaneous placement of an order in a webshop. I will start off with a general description of the problem, and provide details after that. **The problem** Orders are stored in the table 'orders'. Each order has a BillNumber, which is obtained via a mysql … |
| | Hello everyone I am new to this site. I have a university assignment in which I need to program a 2 player pacman game, using C and the Unix operating system. If more than 2 users have typed the command to run the program/s the users must wait in FIFO … |
| | Hi, I am using asp.net with SQL2008 facing a concurrent user issue, if 2 users launches the application and clicks save then it is allowing to save the record twice. I need to avoid saving duplicate record. How can i acheive this? 1 thing i thought of taking Modifiedat value …  |
| | Hi guys, My group is having a software development project for our academics at a university. The software we want to develop is an inventory system which will be installed in a Local Area Network. We have decided to use Visual Studio C# (2005 or higher) as the front-end while … |
| | Hi, I have some code which creates a PDF based on the data posted to the entry point page (print.aspx). When I run a page with multiple frames in, each accessing the main print.aspx and posting data etc. but for some reason each frame loads one at a time, rather … |
| | Hello everyone! I am using python 2.6 on cygwin environment and wondering how could i prevent two python processes from writing to a file at the same time. The file that is shared between the python processes is an ini file and is accessed through ConfigObj module. The first python … |
| | Hi All, My knowledge of databases and Access is almost zero but none the less I have to try and solve a problem with a small home-grown Access database and hoping someone can help. I've done many searches and can't locate what I thought would be an easy answer. There … |
| | Hi, We are planning to upgrade an existing VB6 application to C# ( VS2008 ). ADO.Net follows more a disconnected strategy when accessing Data. I'm thinking about giving the Entity Framework a shot since using an ORM-tool is higly recommended if you want to speed up the development. And EF …  |
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