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• Django as S3 proxy

  - by schneck

  Hi there, I extended a ModelAdmin with a custom field "Download file", which is a link to a URL in my Django project, like: http://www.myproject.com/downloads/1 There, I want to serve a file which is stored in a S3-bucket. The files in the bucket are not public readable, and the user may not have direct access to it. Now I want to avoid that the file has to be loaded in the server memory (these are multi-gb-files) avoid to have temp files on the server The ideal solution would be to let django act as a proxy that streams S3-chunks directly to the user. I use boto, but did not find a possibility to stream the chunks. Any ideas? Thanks.

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• $().mouseMove <-- Empty selector in jQuery 1.4

  - by Matrym

  The following bit of code breaks in the upgrade to jquery 1.4: $().mousemove( function (e) { defaults.mouseX = e.pageX; defaults.mouseY = e.pageY; }); }; What appeared to be a reasonable fix was adding "html" as the selector, ex: $("html"). The fix works fine - except now when the user mouses off the page, it doesn't register the mouse position beyond the boundaries. When attempting to use the mouse position for a drag, for example, the amount of movement beyond the screen is really important. Anyone got any ideas? Thanks in advance.

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• SQL bottleneck, how to fix

  - by masfenix

  This is related to my previous thread: http://stackoverflow.com/questions/3069806/sql-query-takes-about-10-20-minutes However, I kinda figured out the problem. The problem (as described in the previous thread) is not the insert (while its still slow), the problem is looping through the data itself Consider the following code: Dim rs As DAO.Recordset Dim sngStart As Single, sngEnd As Single Dim sngElapsed As Single Set rs = CurrentDb().QueryDefs("select-all").OpenRecordset MsgBox "All records retreived" sngStart = Timer Do While Not rs.EOF rs.MoveNext Loop sngEnd = Timer sngElapsed = Format(sngEnd - sngStart, "Fixed") ' Elapsed time. MsgBox ("The query took " & sngElapsed _ & " seconds to run.") As you can see, this loop does NOTHING. You'd expect it to finish in seconds, however it takes about 857 seconds to run (or 15 minutes). I dont know why it is so slow. Maybe the lotusnotes sql driver? any other ideas? (java based solution, any other solution) What my goal is: To get all the data from remote server and insert into local access table

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• Creating VSTO Excel Template fails

  - by Phil.Wheeler

  I have been trying for ages in all sorts of ways (short of ritual incantations and sacrifices) to get Visual Studio Team Edition 2008 to allow me to create Office 2003 solutions, whether those be templates or documents. No matter what I try, I'm always presented with an error which basically says "You've got the wrong version of Office installed. Try installing something compatible". I have the complete installation of Office 2003 Pro installed along with the Office 2003 Primary Interop Assemblies (which I put on after I installed Office) and then VS2008TE as already mentioned. There has to be some reason why this refuses to work, but I'm out of ideas. Help appreciated.

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• IIS7 + ASP.NET MVC Client Caching Headers Not Working

  - by Tobin Harris

  Hey folks I've deployed an ASP.NET MVC app on IIS7 and Windows Server 2008. I've read posts on here, and around the web, but can't get the darn client-side caching to work. I'm trying to cache everything in the /Content folder. So far I've select that folder in IIS manager, and set the appropriate HTTP Response Headers (under Common Headers). I've also checked the web.config file in the /Content folder and the values there are being set. All resources in /Content come back with this (from FireBug): Cache-Control no-cache, no-store, must-revalidate Pragma no-cache Content-Type image/png Expires -1 Last-Modified Sun, 11 Oct 2009 19:01:40 GMT Accept-Ranges bytes Etag "f318d643a54aca1:0" Server Microsoft-IIS/7.0 X-Powered-By ASP.NET Date Sun, 11 Oct 2009 20:40:01 GMT Content-Length 620 Note the Cache-Control and Expires values for this static image being requested. The site is currently compiled in Debug (this will change), but surely that wouldn't make a difference? Obviously I'm overlooking something, any ideas would be appreciated. Thanks

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• NSString not applying to UILabel

  - by lyonjtill

  - (void)restoreUserDefaults { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; if([defaults objectForKey:@"Exam Name"] == nil) { examName = [[NSString alloc] initWithString:@"Name"]; } else { examName = [[NSString alloc] initWithString:[defaults objectForKey:@"Exam Name"]]; } [examNameLabel setText:examName]; NSLog(@"New Exam Schedule - Exam Name - %@",[defaults objectForKey:@"Exam Name"]); NSLog(@"examName = %@", examName); NSLog(@"examNameLabel = %@", examNameLabel); } Dear all, Basically above is a basic method to change a UILabel to a saved piece of data. I am having a problem making the label change to the NSString examName. I have checked Interface Builder and it's connected up. Any ideas why? Regards Lyon J Till

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• implement code folding with html and java script

  - by Vignesh

  I'm trying to collapse or expand table rows with + and - sign displayed on the first column, using jquery. <script type="text/javascript"> $(document).ready(function() { $("tr.header").click(function () { $("tr.child", $(this).parent()).slideToggle("fast"); }); }); I'm trying to use this code. But I want the child of the parent I'm clicking on alone to be toggled. Any ideas on how to do it?

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• iPhone SDK Internet connection detection

  - by givp

  I'm working on an iPhone application that makes a few calls to web services. I posted this application on the Apple store but it got rejected (and rightly so) since there was no error message displayed to the user if no Internet connection is available. Since obviously the application would not work without it. So I just wanted to know how to best achieve this? I'm guessing something needs to go in the viewDidLoad method that will throw an alert box saying something like "You need an Internet connection to use this application". Any ideas would be appreciated.

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• Wrong assembly-references for Silverlight Sketchflow project in Blend 3

  - by persistent

  Hello, In my installation of Blend 3, the SketchStyles are missing when a new project is created. I found out that this is because the following automatic references in the project are wrong: Microsoft.Expression.Interactions Microsoft.Expression.Prototyping.Interactivity Microsoft.Expression.Prototyping.RunTime Microsoft.Expression.Prototyping.SketchControls In the project references these all point to my project path (where they don't live). If I remove them manually, and instead set the references to ie this: "c:\Program Files (x86)\Microsoft SDKs\Expression\Blend 3\Interactivity\Libraries\Silverlight\Microsoft.Expression.Interactions.dll" everything works. Any ideas on why, and how to fix this? Could it be the project template somehow? TIA

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• JQUERY-UI Draggables - Seralize is running before the Draggable is complete

  - by nobosh

  Hello, I'm using the JQUERY-UI draggable plugin. As a setting, when the Draggable is done, using the STOP setting I run a function to seralize a list of LIs to get their order in terms of their IDs. For example, if I have an UL, with a list of LIs with the following IDs: 1,2,3,4,5 If I then move 5, between 2&3, the seralize is returning: 1,2,5,3,4,5 Which makes me think that the JQUERY UI-Draggable STOP is running before the page is finished rendering, or the DOM isn't update? Any ideas on how I can fix this from happening. Is there something I can do in my Seralize funtion to say, wait till JQUERY animations are all done, or stop all that are going on to ensure the DOM is accurate? Thanks

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• Search over multiple fields

  - by schneck

  Hi there, I think I don't unterstand django-haystack properly: I have a data model containing several fields, and I would to have two of them searched: class UserProfile(models.Model): user = models.ForeignKey(User, unique=True, default=None) twitter_account = models.CharField(max_length=50, blank=False) My search index settings: class UserProfileIndex(SearchIndex): text = CharField(document=True, model_attr='user') twitter_account = CharField(model_attr='twitter_account') def get_queryset(self): """Used when the entire index for model is updated.""" return UserProfile.objects.all() But when I perform a search, only the field "username" is searched; "twitter_account" is ignored. When I select the Searchresults via dbshell, the objects contain the correct values for "user" and "twitter_account", but the result page shows a "no results": {% if query %} <h3>Results</h3> {% for result in page.object_list %} <p> <a href="{{ result.object.get_absolute_url }}">{{ result.object.id }}</a> </p> {% empty %} <p>No results</p> {% endfor %} {% endif %} Any ideas?

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• How do i redirect to a GET request from a POST request on GAE

  - by user259349

  Hello everyone, i am writing an FBML app on facebook hosted in GAE. Facebook will talk to your hosted app only vai POST (im sure this is the cause, but please do correct me if i'm wrong). So im faced with the issue that inside of my POST method, i need to redirect to facebook OAuth authroize URL. But i can only send a GET request. How can i do that? At the moment i'm doing class OauthHandler(webapp.RequestHandler): def post(self): # blablablab request.redirect(oauth_uri) Which is wrong since the oauth_uri is only responding to GET. Further more, OAuth will redirect back to my redirect handler through GET, but i cant! i can only do post. So i'm confused. ideas? Thanks in advance

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• Separation of logic from presentation: HTTP variable names?

  - by Allan Jardine

  Hello all, This could probably be considered an academic question, rather than a real world one - but throwing it out to see if anyone has any great ideas! We all know that keeping the business logic of an application separate from the presentation is a good idea (I'm looking at web-apps atm), but there needs to be an understanding between the business logic for what HTTP variables to expect (and then process) and the variable names which are sent by the presentation layer. Is this simply a matter of telling the designer what variable names to use in a template? The template doesn't need to know what the variable names are (unless using them for JS/CSS selectors), so why should they be 'hardcoded' in there. Or should the business logic put the names into variables to be printed out? Another layer of complexity for the templates? Does anyone have any experience of this, or thoughts on how to deal with it? Thanks, Allan

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• Inverted index in a search engine

  - by Ayman

  Hello there, I'm trying to write some code to make a small application for searching text from files. Files should be crawled, and I need to put an inverted index to boost searches. My problem is that I kind of have ideas about how the parser would be, I'm willing to implement the AND, NOT, OR in the query. Whereas, I couldn't figure out how my index should be... I have never created an inverted index so if any body could suggest a feasable way to do it I would be very grateful... I do know in theory how it works but my problem is I absolutely have no idea to make happen in MySql I need to give keywords being indexed a weight too... Thank you so much.

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• Edit Distance in Python

  - by Alice

  I'm programming a spellcheck program in Python. I have a list of valid words (the dictionary) and I need to output a list of words from this dictionary that have an edit distance of 2 from a given invalid word. I know I need to start by generating a list with an edit distance of one from the invalid word(and then run that again on all the generated words). I have three methods, inserts(...), deletions(...) and changes(...) that should output a list of words with an edit distance of 1, where inserts outputs all valid words with one more letter than the given word, deletions outputs all valid words with one less letter, and changes outputs all valid words with one different letter. I've checked a bunch of places but I can't seem to find an algorithm that describes this process. All the ideas I've come up with involve looping through the dictionary list multiple times, which would be extremely time consuming. If anyone could offer some insight, I'd be extremely grateful. Thanks!

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• Storing ASP.Net MVC Views in the Database

  - by Adam Albrecht

  For an ASP.Net MVC application, I'm interested in storing some views and/or partial views in the database so that a few semi-technical users can do some basic view logic. Does anyone have any tips or lessons from experience on doing this? I know Phil Haack wrote a blog post on this about a year ago. He used IronRuby for scripting his views, (which would be fine for me). He created a quick proof-of-concept, but I can't find any other information on the topic. Any ideas, thoughts, tips, etc would be appreciated. Thanks!

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• Changing system colors for a single application (Windows, .NET)

  - by Michal Czardybon

  I know I should generally avoid messing up with such system settings, but my application do already use nonstandard colors and I have no influence on that. I would like to be able to add standard .NET controls in some places, but their colors do not match. I would like to have a hack that would replace system colors for this one application. One more important thing to note is that it is a .NET application. My (incomplete) ideas so far were: To create a proxy User32.dll library with replaced GetSysColor, but it would be very tedious (731 functions to be redirected, 1 to be replaced) and I do not know how to force my application to use that particular copy. To intercept somehow invocations to GetSysColors (unfortunatelly it is somewhere in the CLR I think). To modify somehow .NET class SystemColors (in memory? is it possible?). Do you have any idea, what is the best (and complete) way to achieve this?

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• WAMP Server not working

  - by Jeremy Rudd

  Okay so a continuation from this question, where you experts intro'd me to WAMP, which can basically execute PHP within a Windows XP environment. So now I've got it installed, but the tray icon forever shows YELLOW, and when I visit any PHP page in my browser, it just shows me the PHP source! Also, when I visit "http://localhost/" in IE7 it gives me a 404 Not Found, FF3 just shows a blank page. BTW I've tried "Restart All Services" and restarting my machine, but it still won't work. Any ideas? Any of you had this problem and solved it? Please help me here, I'm desperate to execute PHP client-side and I'm just reverting to testing on-server for now!

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• Folder browse dialog not showing folders

  - by subash

  I have created an application compiled with .NET 3.5. and used the FolderBrowserDialog object. When a button is pressed i execute this code: FolderBrowserDialog fbd = new FolderBrowserDialog (); fbd.ShowDialog(); A Folder dialog is showed but i can't see any folders. The only thing i see are the buttons OK & Cancel (and create new folder button when the ShowNewFolderButton properyty is set to true). When i try the exact same code on a different form everything is working fine. Any ideas??

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• window.opener.document.getElementById not working

  - by Curtis

  In my asp.net web app, I create a popup window with a button. When that button is clicked, I want to set the value of an asp:TextBox (id=TextBox1) contained in the parent window. However, it doesn't work like all the examples I've read indicate. I've tried the following lines of code in my javascript onclick handler: window.opener.document.getElementById('<%= TextBox1.ClientID %').value = "abc"; window.opener.document.getElementById("TextBox1").value = "abc"; window.opener.document.getElementById("ctl00_ContentPlaceHolder1_TextBox1").value = "abc"; Only example 3 works. All the stuff I've read indicates that #1 is the preferred method, but I can't seem to make it work at all. Does anyone have any ideas what I'm doing wrong? I've tried this in Firefox, Chrome and IE. Thanks

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• How to develop a DirectFB app without leaving X.11 environment.

  - by Edu Felipe

  Hi folks, I'm trying to develop a GUI application for an embedded platform, without any windowing whatsoever and I'm doing that with DirectFB, and it suits my needs very fine. Since the embedded I develop for is not that powerful, I would really like to try to develop on my own Ubuntu desktop. The problem is Framebuffer is conflicting with X.org causing me to leave the whole desktop, and shutdown X.org just to see the result of my changes. Is there a good framebuffer simulator that suits my needs? Qt has one, called QVFb, but it only works for developing Qt apps, and the VNC back-end of DirectFB always crash. So, any ideas?

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• Build warning for distribution configuration of an iPad only application

  - by alan

  Hi, I'm getting the following warning when building an ad hoc distribution copy of a new iPad only application: [BWARN]warning: building with 'Targeted Device Family' that includes iPad ('2') requires building with the 3.2 or later SDK. These are my build settings: Architectures: Optimized (armv6 armv7) Any iPhone OS Simulator: i386 Any iPhone OS Device: Optimized (armv6 armv7) Base SDK: iPhone Device 3.2 Valid Architectures: armv6 armv7 Target Device Family: iPad iPhone OS Deployment Target: iPhone OS 3.2 With this in mind I don't understand the warning. It seems to build and run OK but I'd rather not have warnings in my build for obvious reasons. Any ideas? Thanks in advance, Alan.

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• Using TortoiseHg to push to a authenticated git repository

  - by Nathan Palmer

  I'm trying to push a changeset from a local Mercurial repository created with TortoiseHg to a remote Git repository. I have hg-git installed and configured and it will pull just fine. But when I run the push it gives me this Command hg push git+ssh://git@dummyrepo:username/repo.git Result pushing to git+ssh://git@dummyrepo:username/repo.git importing Hg objects into Git creating and sending data abort: the remote end hung up unexpectedly There are several things I've done to get to this point. But I'm hoping to resolve this last thing because I find TortoiseHg to be much easier to work with than any of the Git tools out there (for windows.) Installed TortoiseHg Pulled down the hg-git from http://bitbucket.org/durin42/hg-git/ Configured mercurial.ini to point to the hg-git library Pulled down dulwich source from git://git.samba.org/jelmer/dulwich.git Compiled dulwich and put it into library.zip for TortoiseHg Configured TortoiseHg to use TortoisePlink.exe for ssh Added my private key to Pageant Any ideas what I could be missing?

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• Occasional InterruptedException when quitting a Swing application

  - by Joonas Pulakka

  I recently updated my computer to a more powerful one, with a quad-core hyperthreading processor (i7), thus plenty of real concurrency available. Now I'm occasionally getting the following error when quitting (System.exit(0)) an application (with a Swing GUI) that I'm developing: Exception while removing reference: java.lang.InterruptedException java.lang.InterruptedException at java.lang.Object.wait(Native Method) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134) at sun.java2d.Disposer.run(Disposer.java:125) at java.lang.Thread.run(Thread.java:619) Well, given that it started to happen with a more concurrency-capable hardware, and it has to do with threads, and it happens occasionally, it's obviously some kind of timing thing. But the problem is that the stack trace is so short. All I have is the listing above. It doesn't include my own code at all, so it's somewhat hard to guess where the bug is. Has anyone experienced something like this before? Any ideas how to start solving it?

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• NSOutlineView not refreshing when objects added to managed object context from NSOperations

  - by John Gallagher

  Background Cocoa app using core data Two processes - daemon and a main UI Daemon constantly writing to a data store UI process reads from same data store NSOutlineView in UI is bound to an NSTreeController which is bound to Application with key path of delegate.interpretedMOC What I want When the UI is activated, the outline view should update with the latest data inserted by the daemon. The Problem Main Thread Approach I fetch all the entities I'm interested in, then iterate over them, doing refreshObject:mergeChanges:YES. This works OK - the items get refreshed correctly. However, this is all running on the main thread, so the UI locks up for 10-20 seconds whilst it refreshes. Fine, so let's move these refreshes to NSOperations that run in the background instead. NSOperation Multithreaded Approach As soon as I move the refreshObject:mergeChanges: call into an NSOperation, the refresh no longer works. When I add logging messages, it's clear that the new objects are loaded in by the NSOperation subclass and refreshed. Not only that, but they are What I've tried I've messed around with this for 2 days solid and tried everything I can think of. Passing objectIDs to the NSOperation to refresh instead of an entity name. Resetting the interpretedMOC at various points - after the data refresh and before the outline view reload. I'd subclassed NSOutlineView. I discarded my subclass and set the view back to being an instance of NSOutlineView, just in case there was any funny goings on here. Added a rearrangeObjects call to the NSTreeController before reloading the NSOutlineView data. Made sure I had set the staleness interval to 0 on all managed object contexts I was using. I've got a feeling this problem is somehow related to caching core data objects in memory. But I've totally exhausted all my ideas on how I get this to work. I'd be eternally grateful of any ideas anyone else has. Code Main Thread Approach // In App Delegate -(void)applicationDidBecomeActive:(NSNotification *)notification { // Delay to allow time for the daemon to save [self performSelector:@selector(refreshTrainingEntriesAndGroups) withObject:nil afterDelay:3]; } -(void)refreshTrainingEntriesAndGroups { NSSet *allTrainingGroups = [[[NSApp delegate] interpretedMOC] fetchAllObjectsForEntityName:kTrainingGroup]; for(JGTrainingGroup *thisTrainingGroup in allTrainingGroups) [interpretedMOC refreshObject:thisTrainingGroup mergeChanges:YES]; NSError *saveError = nil; [interpretedMOC save:&saveError]; [windowController performSelectorOnMainThread:@selector(refreshTrainingView) withObject:nil waitUntilDone:YES]; } // In window controller class -(void)refreshTrainingView { [trainingViewTreeController rearrangeObjects]; // Didn't really expect this to have any effect. And it didn't. [trainingView reloadData]; } NSOperation Multithreaded Approach // In App Delegate -(void)refreshTrainingEntriesAndGroups { JGRefreshEntityOperation *trainingGroupRefresh = [[JGRefreshEntityOperation alloc] initWithEntityName:kTrainingGroup]; NSOperationQueue *refreshQueue = [[NSOperationQueue alloc] init]; [refreshQueue setMaxConcurrentOperationCount:1]; [refreshQueue addOperation:trainingGroupRefresh]; while ([[refreshQueue operations] count] > 0) { [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.05]]; [windowController performSelectorOnMainThread:@selector(refreshTrainingView) withObject:nil waitUntilDone:YES]; } // JGRefreshEntityOperation.m @implementation JGRefreshEntityOperation @synthesize started; @synthesize executing; @synthesize paused; @synthesize finished; -(void)main { [self startOperation]; NSSet *allEntities = [imoc fetchAllObjectsForEntityName:entityName]; for(id thisEntity in allEntities) [imoc refreshObject:thisEntity mergeChanges:YES]; [self finishOperation]; } -(void)startOperation { [self willChangeValueForKey:@"isExecuting"]; [self willChangeValueForKey:@"isStarted"]; [self setStarted:YES]; [self setExecuting:YES]; [self didChangeValueForKey:@"isExecuting"]; [self didChangeValueForKey:@"isStarted"]; imoc = [[NSManagedObjectContext alloc] init]; [imoc setStalenessInterval:0]; [imoc setUndoManager:nil]; [imoc setPersistentStoreCoordinator:[[NSApp delegate] interpretedPSC]]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mergeChanges:) name:NSManagedObjectContextDidSaveNotification object:imoc]; } -(void)finishOperation { saveError = nil; [imoc save:&saveError]; if (saveError) { NSLog(@"Error saving. %@", saveError); } imoc = nil; [self willChangeValueForKey:@"isExecuting"]; [self willChangeValueForKey:@"isFinished"]; [self setExecuting:NO]; [self setFinished:YES]; [self didChangeValueForKey:@"isExecuting"]; [self didChangeValueForKey:@"isFinished"]; } -(void)mergeChanges:(NSNotification *)notification { NSManagedObjectContext *mainContext = [[NSApp delegate] interpretedMOC]; [mainContext performSelectorOnMainThread:@selector(mergeChangesFromContextDidSaveNotification:) withObject:notification waitUntilDone:YES]; } -(id)initWithEntityName:(NSString *)entityName_ { [super init]; [self setStarted:false]; [self setExecuting:false]; [self setPaused:false]; [self setFinished:false]; [NSThread setThreadPriority:0.0]; entityName = entityName_; return self; } @end // JGRefreshEntityOperation.h @interface JGRefreshEntityOperation : NSOperation { NSString *entityName; NSManagedObjectContext *imoc; NSError *saveError; BOOL started; BOOL executing; BOOL paused; BOOL finished; } @property(readwrite, getter=isStarted) BOOL started; @property(readwrite, getter=isPaused) BOOL paused; @property(readwrite, getter=isExecuting) BOOL executing; @property(readwrite, getter=isFinished) BOOL finished; -(void)startOperation; -(void)finishOperation; -(id)initWithEntityName:(NSString *)entityName_; -(void)mergeChanges:(NSNotification *)notification; @end

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