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  • UML diagram for application architecture?

    - by fayer
    i'm trying to map my whole application in a UML diagram and i wonder what diagram type i should use. im not doing this in class level, rather from a bird eye's perspective. single application object (patterns: singleton)(examples: CodeIgniter application) that composes multiple module objects (patterns: singleton, facades)(examples: guestbook, addressbook) that compose multiple low level stand alone objects (examples: mysql mapper, doctrine mapper) that compose various 3rd and in-house libraries (examples: doctrine, solr, xml-parser) what UML diagram is suited for this kind of overview presentation? thanks

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  • Gradual memory leak in loop over contents of QTMovie

    - by Benji XVI
    I have a simple foundation tool that exports every frame of a movie as a .tiff file. Here is the relevant code: NSString* movieLoc = [NSString stringWithCString:argv[1]]; QTMovie *sourceMovie = [QTMovie movieWithFile:movieLoc error:nil]; int i=0; while (QTTimeCompare([sourceMovie currentTime], [sourceMovie duration]) != NSOrderedSame) { // save image of movie to disk NSAutoreleasePool *arp = [[NSAutoreleasePool alloc] init]; NSString *filePath = [NSString stringWithFormat:@"/somelocation_%d.tiff", i++]; NSData *currentImageData = [[sourceMovie currentFrameImage] TIFFRepresentation]; [currentImageData writeToFile:filePath atomically:NO]; NSLog(@"%@", filePath); [sourceMovie stepForward]; [arp release]; } [pool drain]; return 0; As you can see, in order to prevent very large memory buildups with the various transparently-autoreleased variables in the loop, we create, and flush, an autoreleasepool with every run through the loop. However, over the course of stepping through a movie, the amount of memory used by the program still gradually increases. Instruments is not detecting any memory leaks per se, but the object trace shows certain General Data blocks to be increasing in size. [Edited out reference to slowdown as it doesn't seem to be as much of a problem as I thought.] Edit: let's knock out some parts of the code inside the loop & see what we find out... Test 1 while (banana) { NSAutoreleasePool *arp = [[NSAutoreleasePool alloc] init]; NSString *filePath = [NSString stringWithFormat:@"/somelocation_%d.tiff", i++]; NSLog(@"%@", filePath); [sourceMovie stepForward]; [arp release]; } Here we simply loop over the whole movie, creating the filename and logging it. Memory characteristics: remains at 15MB usage for the duration. Test 2 while (banana) { NSAutoreleasePool *arp = [[NSAutoreleasePool alloc] init]; NSImage *image = [sourceMovie currentFrameImage]; [sourceMovie stepForward]; [arp release]; } Here we add back in the creation of the NSImage from the current frame. Memory characteristics: gradually increasing memory usage. RSIZE is at 60MB by frame 200; 75MB by f300. Test 3 while (banana) { NSAutoreleasePool *arp = [[NSAutoreleasePool alloc] init]; NSImage *image = [sourceMovie currentFrameImage]; NSData *imageData = [image TIFFRepresentation]; [sourceMovie stepForward]; [arp release]; } We've added back in the creation of an NSData object from the NSImage. Memory characteristics: Memory usage is again increasing: 62MB at f200; 75MB at f300. In other words, largely identical. It looks like a memory leak in the underlying system QTMovie uses to do currentFrameImage, to me.

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  • Using DateTime in PHP, generating bad unix epoch time from $foo->format('U')

    - by Jazzepi
    I can't seem to get the correct Unix epoch time out of this PHP DateTime object. $startingDateTime = "2005/08/15 1:52:01 am"; $foo = new DateTime($startingDateTime, new DateTimeZone("America/New_York")); echo $foo-format('U'); which gives 1124085121 Which is Mon, 15 Aug 2005 00:52:01 GMT -500 (according to http://www.epochconverter.com/) but that's incorrect by an hour. It SHOULD be 1124088721 and spit back at me as Mon, 15 Aug 2005 01:52:01 GMT -500 Any help would be appreciated.

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  • jquery ie6 issue swaping videos through hide/show while playing.

    - by user217181
    So my code is: Click the link show the div. I'm using the jquery flash embed object. $(document).ready( function() { $('a.overview').click( function() { $('#overview').show(); // show div.contact $('#evaulting').hide(); // hide div.contact $('#his').hide(); // hide div.contact }); }); $(document).ready( function() { $('a.evaulting').click( function() { $('#evaulting').show(); // show div.contact $('#overview').hide(); // hide div.contact $('#his').hide(); // hide div.contact }); }); <div id="overview" style="display:none"> <ul> <li rel="play-norelated.swf:680:480:true:ffffff" class="flash-replaced"> <embed width="680" height="480" type="application/x-shockwave-flash" src="play-norelated.swf" pluginspage="http://www.adobe.com/go/getflashplayer" flashvars="playVideo=ent_web_480x" bgcolor="ffffff" /> <div class="alt"><h1>To Play Iron Mountain Videos - You will need to upgrade your Flash Player</h1> <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p></div> </li> </ul> </div> <div id="evaulting" style="display:none"> <ul> <li rel="play-norelated.swf:680:480:true:ffffff" class="flash-replaced"> <embed width="680" height="480" type="application/x-shockwave-flash" src="play-norelated.swf" pluginspage="http://www.adobe.com/go/getflashplayer" flashvars="playVideo=evaulting_web_480x" bgcolor="ffffff" /> <div class="alt"><h1>To Play Iron Mountain Video's - You will need to upgrade your Flash Player</h1> <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p></div> </li> </ul> </div> When I repeat this code and get the second video to load on click. It works in all browsers. The only issue I'm running into is that in IE6 the video keeps playing and in other browsers it stops the video your watching and loads the one you clicked on. I looked into using the .remove object or the .append to a div, but I can't seem to get that to work and if it does work will it play nice with IE6. Try it out and maybe solve my issues.

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  • MVC, can model save/load its data?

    - by fuzzygoat
    Quick question, my data model is a singleton object and it contains a list of names I want archive. My idea is to make the model responsible for loading / saving this data. The ModelLoad will then be called by the ViewControllerviewDidLoad and the ModelSave by ViewControllerapplicationWillTerminate. I could do the load / save directly within the ViewController, but this would be messy as the list of names are on instance variable of the model. gary

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  • General ORM design question

    - by Calvin
    Suppose you have 2 classes, Person and Rabbit. A person can do a number of things to a rabbit, s/he can either feed it, buy it and become its owner, or give it away. A rabbit can have none or at most 1 owner at a time. And if it is not fed for a while, it may die. Class Person { Void Feed(Rabbit r); Void Buy(Rabbit r); Void Giveaway(Person p, Rabbit r); Rabbit[] rabbits; } Class Rabbit { Bool IsAlive(); Person pwner; } There are a couple of observations from the domain model: Person and Rabbit can have references to each other Any actions on 1 object can also change the state of the other object Even if no explicit actions are invoked, there can still be a change of state in the objects (e.g. Rabbit can be starved to death, and that causes it to be removed from the Person.rabbits array) As DDD is concerned, I think the correct approach is to synchronize all calls that may change the states in the domain model. For instance, if a Person buys a Rabbit, s/he would need to acquire a lock in Person to make a change to the rabbits array AND also another lock in Rabbit to change its owner before releasing the first one. This would prevent a race condition where 2 Persons claim to be the owner of the little Rabbit. The other approach is to let the database to handle all these synchronizations. Who makes the first call wins, but then the DB needs to have some kind of business logics to figure out if it is a valid transaction (e.g. if a Rabbit already has an owner, it cannot change its owner unless the Person gives it away). There are both pros/cons in either approach, and I’d expect the “best” solution would be somewhere in-between. How would you do it in real life? What’s your take and experience? Also, is it a valid concern that there can be another race condition the domain model has committed its change but before it is fully committed in the database? And for the 3rd observation (i.e. state change due to time factor). How will you do it?

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  • VB.NET Select...Case Statement Equivalent in C#

    - by Alex Essilfie
    I just started using C# and I've got a couple of issues. Is there any way to code the C# equivalent of the VB.NET Select statement like the following? Select Object.Name.ToString() Case "Name1" 'Do something Case "Name2" 'Do something else Case Else 'Do the default action End Select Any help would be greatly appreciated.

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  • Does anyone know what happens if you do not implement iequtalable when using generic collections?

    - by ChloeRadshaw
    I asked a question here : http://stackoverflow.com/questions/2476793/when-to-use-iequatable-and-why about using Iequatable. From the msdn: The IEquatable(T) interface is used by generic collection objects such as Dictionary(TKey, TValue), List(T), and LinkedList(T) when testing for equality in such methods as Contains, IndexOf, LastIndexOf, and Remove. If you dont implement that interface what exactly happens?? Exception / default object equals / ref equals?

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  • Getting the Assembly Qualified Name of a class in Visual Studio

    - by Alex Marshall
    Hello, I'm writing a customized reflective library for some specialized custom domain logic, and that library is going to use XML configuration files that will dynamically resolve System.Type objects at runtime. However, when writing the XML configuration files, it's a bit of a pain to write the types because they need to be fully qualified assembly names for Type.GetType() to resolve them. Is there a way to find out the AssemblyQualifiedName of an object in Visual Studio without resorting to writing a program to print them out to a file or standard out or anything like that ?

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  • How to modify a already made tween?

    - by Fahim Akhter
    Hi, I have a tween like this : new Tween(myObject, "x",null,nowPosition,finalPosition,time,true); sometween.start(); Now when the tween has not finished and is somewhere in the middle and the final position changes. I want this tween to be modified so instead of moving to its already defined postion the object goes to the final position. Any ideas?

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  • LINQ VB.NET variable not found when looping through grouped query

    - by Ed Sneller
    I'm trying to do the following LINQ grouping, which works in the debugger (the results are populated in the GroupedOrders object. But VS 2008 gives me the following error at design time... Name 'x' is not declared Dim GroupedOrders = (From m In thisConsultant.orders _ Group m By Key = m.commCode Into Group _ Select commCode = Key, orders = Group) For Each x In GroupedOrders Next VS 2008 gives me the following error,

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  • .net: does anyone know a free library to download nntp messages

    - by stighy
    hi folks, i'm using ip*works for download newsgroup message and insert them into a database... ipworks is "comfortable" to use because it automatically split nntp data return into different object (or variable). So i've "author" "date" "topic" "messagge" already splitted to my use. However ipworks isn't free and it cost a lot for my use.. so i'm asking you some component or code snippet to use to download and "manage" nntp messagges. Thanks in advance and regards!

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  • Is this a legitimate implementation of a 'remember me' function for my web app?

    - by user246114
    Hi, I'm trying to add a "remember me" feature to my web app to let a user stay logged in between browser restarts. I think I got the bulk of it. I'm using google app engine for the backend which lets me use java servlets. Here is some pseudo-code to demo: public class MyServlet { public void handleRequest() { if (getThreadLocalRequest().getSession().getAttribute("user") != null) { // User already has session running for them. } else { // No session, but check if they chose 'remember me' during // their initial login, if so we can have them 'auto log in' // now. Cookie[] cookies = getThreadLocalRequest().getCookies(); if (cookies.find("rememberMePlz").exists()) { // The value of this cookie is the cookie id, which is a // unique string that is in no way based upon the user's // name/email/id, and is hard to randomly generate. String cookieid = cookies.find("rememberMePlz").value(); // Get the user object associated with this cookie id from // the data store, would probably be a two-step process like: // // select * from cookies where cookieid = 'cookieid'; // select * from users where userid = 'userid fetched from above select'; User user = DataStore.getUserByCookieId(cookieid); if (user != null) { // Start session for them. getThreadLocalRequest().getSession() .setAttribute("user", user); } else { // Either couldn't find a matching cookie with the // supplied id, or maybe we expired the cookie on // our side or blocked it. } } } } } // On first login, if user wanted us to remember them, we'd generate // an instance of this object for them in the data store. We send the // cookieid value down to the client and they persist it on their side // in the "rememberMePlz" cookie. public class CookieLong { private String mCookieId; private String mUserId; private long mExpirationDate; } Alright, this all makes sense. The only frightening thing is what happens if someone finds out the value of the cookie? A malicious individual could set that cookie in their browser and access my site, and essentially be logged in as the user associated with it! On the same note, I guess this is why the cookie ids must be difficult to randomly generate, because a malicious user doesn't have to steal someone's cookie - they could just randomly assign cookie values and start logging in as whichever user happens to be associated with that cookie, if any, right? Scary stuff, I feel like I should at least include the username in the client cookie such that when it presents itself to the server, I won't auto-login unless the username+cookieid match in the DataStore. Any comments would be great, I'm new to this and trying to figure out a best practice. I'm not writing a site which contains any sensitive personal information, but I'd like to minimize any potential for abuse all the same, Thanks

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  • Autovivification in C#

    - by Terrance
    Trying to wrap my head around perl's Autovivification and based on what it sounds like, It seems to work similar to dynamics in C# as a dynamic object is not assigned a type until runtime or, am I totally off here. If so then is there a comparable idea that I can bridge off of in C# that makes sense? Edit Okay so I'm apparently way off. So as second part of the 2 part question, is there anything conceptually comparable in C#?

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  • Date conversion in Java

    - by llm
    How can I take a string in a format such as: 2008-06-02 00:00:00.0 and convert it to: 02-Jun-2008? Can I somehow take the original string, convert it to a Date object, then use a formatter to get the final output (rather than parsing the string myself)? Thanks!

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  • MonoRail - "Unexpected item on the stack" Error

    - by Justin
    Hey, Anyone seen this MonoRail error before and know what it means? Unexpected item on the stack: found UCampus.Core.Models.Nested.Hours, expecting UCampus.Core.Models.Business I'm saving a Business object when this error occurs, Hours is a child of a child of Business. Thanks, Justin

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  • Spring aspectj jar not configured correctly

    - by newguy
    I am getting this error when I tried to use a JPA object created by Roo. Entity manager has not been injected (is the Spring Aspects JAR configured as an AJC/AJDT aspects library?) I have followed some online advice to add the spring-aspects.jar to aspectj path in Eclipse but I still get this error. Does anyone know how to solve this? The environment I am using is Spring 3.0.5, Hibernate 3.6 and JBoss 6.0.0.Final.

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