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  • How to manage transaction for database and file system in jee environment?

    - by Michael Lu
    I store file’s attributes (size, update time…) in database. So the problem is how to manage transaction for database and file. In jee environment, JTA is just able to manage database transaction. In case, updating database is successful but file operation fails, should I write file-rollback method for this? Moreover, file operation in EJB container violates EJB spec. What’s your opinion? Thank!

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  • Understanding WebRequest

    - by Nai
    I found this snippet of code here that allows you to log into a website and get the response from the logged in page. However, I'm having trouble understanding all the part of the code. I've tried my best to fill in whatever I understand so far. Hope you guys can fill in the blanks for me. Thanks string nick = "mrbean"; string password = "12345"; //this is the query data that is getting posted by the website. //the query parameters 'nick' and 'password' must match the //name of the form you're trying to log into. you can find the input names //by using firebug and inspecting the text field string postData = "nick=" + nick + "&password=" + password; // this puts the postData in a byte Array with a specific encoding //Why must the data be in a byte array? byte[] data = Encoding.ASCII.GetBytes(postData); // this basically creates the login page of the site you want to log into WebRequest request = WebRequest.Create("http://www.mrbeanandme.com/login/"); // im guessing these parameters need to be set but i dont why? request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = data.Length; // this opens a stream for writing the post variables. // im not sure what a stream class does. need to do some reading into this. Stream stream = request.GetRequestStream(); // you write the postData to the website and then close the connection? stream.Write(data, 0, data.Length); stream.Close(); // this receives the response after the log in WebResponse response = request.GetResponse(); stream = response.GetResponseStream(); // i guess you need a stream reader to read a stream? StreamReader sr = new StreamReader(stream); // this outputs the code to console and terminates the program Console.WriteLine(sr.ReadToEnd()); Console.ReadLine();

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  • How to disable click sound in WebBrowser Control

    - by dr. evil
    I use Javascript to click a link in the webbrowser control. But I don't want to hear IE's "click" sound. Is there anyway to do this? P.S. I don't want to change system settings. I've seen this one(http://stackoverflow.com/questions/10456/howto-disable-webbrowser-click-sound-in-your-app-only) but Document.Write is not an option for me.

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  • Android files manipulation

    - by klaus-vlad
    Hi, Through the housekeeping stuff my android application has to do is to read and write some files and sometimes to delete others and create new ones. The files in cause have all "sdcard/" as root. Is it safe if I perform all this task using Java style functions ? To me it is very handy to do it this way but I've read that not always the java functions can be applied when it comes to files in Android.

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  • What inspired WPF?

    - by Andrei Rinea
    I was told by someon that, just as .NET started inspired from Java, WPF was inspired by a similar technology, as "Microsoft never innovates". However, I can't find anything remotely close to WPF. What particular technology did or could have inspired Microsoft to write WPF?

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  • Drawing on top of every windows on X11

    - by Vítor Baptista
    Hi, I am trying to make an arcade machine. The user will purchase credits, which will allow him to play for X minutes. I want to write "9:42 minutes left" at the left corner of the screen, even if he's playing a full screen game (UrbanTerror, for example). I would really like if I could do this with Ruby, but any other language is OK. Any ideas? Thanks in advance.

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  • Show app running time in iPhone

    - by Sam
    I would like to write a counter that shows how many seconds an app has be running for. (textView) and the counter should be cumulative and starts from where it left off. Im new to iphone sdk.

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  • Read media stream from servlet in a webpage?

    - by khue
    Hi, I have a servlet that construct response to a media file request by reading the file from server: File uploadFile = new File("C:\TEMP\movie.mov"); FileInputStream in = new FileInputStream(uploadFile); Then write that stream to the response stream. My question is how do I play the media file in the webpage using or tag to read the media stream from the response. Thank you very much. Regards K.

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  • LINQ statement as if condition

    - by dotnetdev
    I saw a piece of code which was written like this: if (from n in numbers select n where n = 5) However, I tried writing something like this but came across errors (bare in mind the code sample may not be exactly as above as I am typing from memory). How can I write code like the above? Thanks

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  • Play animation (storyboard) backwards

    - by drasto
    Is there a simple way to play some StoryBoad backward (reversed) ? As there is a method Storyboard.Begin() I would expect that there is some method like "Storyboard.BeginReversed()" but I cannot find it. If there is no way to play an animation backwards that I have to write for most of my animations complementary animations. That smells bad to me (code duplication of some kind). Basically I just animate a Grid that shows and than hides.

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  • Writing white space to CSV fields in Python?

    - by matt
    When I try to write a field that includes whitespace in it, it gets split into multiple fields on the space. What's causing this? It's driving me insane. Thanks data = open("file.csv", "wb") w = csv.writer(data) w.writerow(['word1', 'word2']) w.writerow(['word 1', 'word2']) data.close() I'll get 2 fields(word1,word2) for first example and 3(word,1,word2) for the second.

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  • Using Page anchors on Google AppEngine?

    - by codingJoe
    I would like to have AppEngine render an html page that auto scrolls to an html anchor point. I'm not how and where to put the that type of instruction. template_values = { 'foo' : 'foo', 'bar': 'bar', 'anchor' : '#MyPageAnchor' # ?? Something like this... } path = os.path.join(os.path.dirname(__file__), fileName) self.response.out.write(template.render(path, template_values)) Is this possible? How do I accomplish this?

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  • Help me in choosing framework.

    - by Vinayak Phal
    I'm a php developer from last 3-4 months. I used to write direct applications. Now i've decided to use a php framework. Which is the best suitable framework for me? Currently i'm developing a application side by side i want to learn framework by doing some simple stuff and to use it in next project.

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  • Is transmitted bytes event exist in Linux kernel?

    - by alnet
    I need to write a rate limiter, that will perform some stuff each time X bytes were transmitted. The straightforward is to check the length of each transmitted packet, but I think it will be to slow for me. Is there a way to use some king of network event, that will be triggered by transmitted packets/bytes?

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  • stop ReconnectingClientFactory (XmlStreamFactory)

    - by defreng
    Hey guys, I tried to write a XMPP Client using this mentioned factories. Now my program only needs this connection during a short time. How can I make the Factory to stop reconnection attempts? Unfortunately stopTrying doesn't work. Do I have to disconnect running connections before? Any help would be appreciated :)

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  • Core Data: fetch an NSManagedObject by its properties

    - by niklassaers
    Hi guys, I have an object NetworkMember that has no attributes but is defined by its relationships Person, Network, Level and Role. In my app, I've found all the four relationships, but I want to make sure not to double-register my NetworkMember, thus I'd like to search for this NSManagedObject before instantiating it. How should I write a query that queries for an NSManagedObject just consisting of relationships? Cheers Nik

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  • How to check for palindrome using Python logic

    - by DrOnline
    My background is only a 6 month college class in basic C/C++, and I'm trying to convert to Python. I may be talking nonsense, but it seems to me C, at least at my level, is very for-loop intensive. I solve most problems with these loops. And it seems to me the biggest mistake people do when going from C to Python is trying to implement C logic using Python, which makes things run slowly, and it's just not making the most of the language. I see on this website: http://hyperpolyglot.org/scripting (serach for "c-style for", that Python doesn't have C-style for loops. Might be outdated, but I interpret it to mean Python has its own methods for this. I've tried looking around, I can't find much up to date (Python 3) advice for this. How can I solve a palindrome challenge in Python, without using the for loop? I've done this in C in class, but I want to do it in Python, on a personal basis. The problem is from the Euler Project, great site btw. def isPalindrome(n): lst = [int(n) for n in str(n)] l=len(lst) if l==0 || l==1: return True elif len(lst)%2==0: for k in range (l) ##### else: while (k<=((l-1)/2)): if (list[]): ##### for i in range (999, 100, -1): for j in range (999,100, -1): if isPalindrome(i*j): print(i*j) break I'm missing a lot of code here. The five hashes are just reminders for myself. Concrete questions: 1) In C, I would make a for loop comparing index 0 to index max, and then index 0+1 with max-1, until something something. How to best do this in Python? 2) My for loop (in in range (999, 100, -1), is this a bad way to do it in Python? 3) Does anybody have any good advice, or good websites or resources for people in my position? I'm not a programmer, I don't aspire to be one, I just want to learn enough so that when I write my bachelor's degree thesis (electrical engineering), I don't have to simultaneously LEARN an applicable programming language while trying to obtain good results in the project. "How to go from basic C to great application of Python", that sort of thing. 4) Any specific bits of code to make a great solution to this problem would also be appreciated, I need to learn good algorithms.. I am envisioning 3 situations. If the value is zero or single digit, if it is of odd length, and if it is of even length. I was planning to write for loops... PS: The problem is: Find the highest value product of two 3 digit integers that is also a palindrome.

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