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  • Objects not loading on second request in Restkit

    - by Holger Edward Wardlow Sindbæk
    I'm sending off 2 requests simultaneously with Restkit and I receive a response back from both of them, but only one of the requests receives any objects. If I send them off one by one, then my objectloader receives all objects. First request: self.firstObjectManager = [RKObjectManager sharedManager]; [self.firstObjectManager loadObjectsAtResourcePath:[NSString stringWithFormat: @"/%@.json", subUrl] usingBlock:^(RKObjectLoader *loader){ [loader.mappingProvider setObjectMapping:designArrayMapping forKeyPath:@""]; loader.userData = @"design"; loader.delegate = self; [loader sendAsynchronously]; }]; Second request: self.secondObjectManager = [RKObjectManager sharedManager]; [self.secondObjectManager loadObjectsAtResourcePath:[NSString stringWithFormat: @"/%@.json", subUrl] usingBlock:^(RKObjectLoader *loader){ [loader.mappingProvider setObjectMapping:designerMapping forKeyPath:@""]; loader.userData = @"designer"; loader.delegate = self; [loader sendAsynchronously]; }]; My objecloader: -(void)objectLoader:(RKObjectLoader *)objectLoader didLoadObjects:(NSArray *)objects { //NSLog(@"This happened: %@", objectLoader.userData); if (objectLoader.userData == @"design") { NSLog(@"Design happened: %i", objects.count); }else if(objectLoader.userData == @"designer"){ NSLog(@"designer: %@", [objects objectAtIndex:0]); } } My response: 2012-11-18 14:36:19.607 RestKitTest5[14220:c07] Started loading of request: designer 2012-11-18 14:36:22.575 RestKitTest5[14220:c07] I restkit.network:RKRequest.m:680:-[RKRequest updateInternalCacheDate] Updating cache date for request <RKObjectLoader: 0x95c3160> to 2012-11-18 19:36:22 +0000 2012-11-18 14:36:22.576 RestKitTest5[14220:c07] response code: 200 2012-11-18 14:36:22.584 RestKitTest5[14220:c07] Design happened: 0 2012-11-18 14:36:22.603 RestKitTest5[14220:c07] I restkit.network:RKRequest.m:680:-[RKRequest updateInternalCacheDate] Updating cache date for request <RKObjectLoader: 0xa589b50> to 2012-11-18 19:36:22 +0000 2012-11-18 14:36:22.605 RestKitTest5[14220:c07] response code: 200 2012-11-18 14:36:22.606 RestKitTest5[14220:c07] designer: <DesignerData: 0xa269fc0> Update: Setting my base url RKURL *baseURL = [RKURL URLWithBaseURLString:@"http://iphone.meer.li"]; [RKObjectManager setSharedManager:[RKObjectManager managerWithBaseURL:baseURL]]; Solution Problem was that I used the shared manager for both object managers, so I ended up doing: RKURL *baseURL = [RKURL URLWithBaseURLString:@"http://iphone.meer.li"]; RKObjectManager *myObjectManager = [[RKObjectManager alloc] initWithBaseURL:baseURL]; self.firstObjectManager = myObjectManager; and: RKURL *baseURL = [RKURL URLWithBaseURLString:@"http://iphone.meer.li"]; RKObjectManager *myObjectManager = [[RKObjectManager alloc] initWithBaseURL:baseURL]; self.secondObjectManager = myObjectManager;

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  • Loading a Reusable UITableViewCell from a Nib

    - by Greg Martin
    I am able to design custom UITableViewCells and load them just fine using the technique described in the thread found at http://forums.macrumors.com/showthread.php?t=545061. However, using that method no longer allows you to init the cell with a reuseIdentifier which means you have to create whole new instances of each cell at every call. Has anyone figured out a good way to still cache particular cell types for reuses, but still be able to design them in Interface Builder?

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  • how to implement a "soft barrier" in multithreaded c++

    - by Jason
    I have some multithreaded c++ code with the following structure: do_thread_specific_work(); update_shared_variables(); //checkpoint A do_thread_specific_work_not_modifying_shared_variables(); //checkpoint B do_thread_specific_work_requiring_all_threads_have_updated_shared_variables(); What follows checkpoint B is work that could have started if all threads have reached only checkpoint A, hence my notion of a "soft barrier". Typically multithreading libraries only provide "hard barriers" in which all threads must reach some point before any can continue. Obviously a hard barrier could be used at checkpoint B. Using a soft barrier can lead to better execution time, especially since the work between checkpoints A and B may not be load-balanced between the threads (i.e. 1 slow thread who has reached checkpoint A but not B could be causing all the others to wait at the barrier just before checkpoint B). I've tried using atomics to synchronize things and I know with 100% certainty that is it NOT guaranteed to work. For example using openmp syntax, before the parallel section start with: shared_thread_counter = num_threads; //known at compile time #pragma omp flush Then at checkpoint A: #pragma omp atomic shared_thread_counter--; Then at checkpoint B (using polling): #pragma omp flush while (shared_thread_counter > 0) { usleep(1); //can be removed, but better to limit memory bandwidth #pragma omp flush } I've designed some experiments in which I use an atomic to indicate that some operation before it is finished. The experiment would work with 2 threads most of the time but consistently fail when I have lots of threads (like 20 or 30). I suspect this is because of the caching structure of modern CPUs. Even if one thread updates some other value before doing the atomic decrement, it is not guaranteed to be read by another thread in that order. Consider the case when the other value is a cache miss and the atomic decrement is a cache hit. So back to my question, how to CORRECTLY implement this "soft barrier"? Is there any built-in feature that guarantees such functionality? I'd prefer openmp but I'm familiar with most of the other common multithreading libraries. As a workaround right now, I'm using a hard barrier at checkpoint B and I've restructured my code to make the work between checkpoint A and B automatically load-balancing between the threads (which has been rather difficult at times). Thanks for any advice/insight :)

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  • atomic operation cost

    - by osgx
    Hello What is the cost of the atomic operation? How much cycles does it consume? Will it pause other processors on SMP or NUMA, or will it block memory accesses? Will it flush reorder buffer in out-of-order CPU? What effects will be on the cache? Thanks.

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  • imageWithCGImage and memory

    - by Adam Ernst
    If I use [UIImage imageWithCGImage:], passing in a CGImageRef, do I then release the CGImageRef or does UIImage take care of this itself when it is deallocated? The documentation isn't entirely clear. It says "This method does not cache the image object." Originally I called CGImageRelease on the CGImageRef after passing it to imageWithCGImage:, but that caused a malloc_error_break warning in the Simulator claiming a double-free was occurring.

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  • problems with passing html to the server with jquery

    - by CoffeeCode
    i have an ajax call $.ajax({ url: '<%=Url.Action("SaveDetails","Survey") %>', dataType: 'JSON', cache: false, data: { Id: selectedRow.Id, Value: surveyValue, FileName: filename, FileGuid: fileguid }, success: function(data) { ... } }); where the surveyValue is a html string. this call doesn't work. but is i change the surveyValue to an ordinary text i works fine. how can i pass the html to the server?

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  • Any downsides to UPX-ing my 32-bit Python 2.6.4 development environment EXE/PYD/DLL files?

    - by Malcolm
    Are there any downsides to UPX-ing my 32-bit Python 2.6.4 development environment EXE/PYD/DLL files? The reason I'm asking is that I frequently use a custom PY2EXE script that UPX's copies of these files on every build. Yes, I could get fancy and try to cache UPXed files, but I think a simpler, safer, and higher performance solution would be for me to just UPX my Python 2.6.4 directory once and be done with it. Thoughts? Malcolm

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  • How to import RoR project to Netbeans

    - by user369759
    I have very simple (in fact empty ) project which i have created by rails new MyProject command from command-line. So, i want to import it to NetBeans IDE. I click "new project" - "RoR" - "from existing source", select Ruby 1.9.2 (instead of embedded JRuby) in the wizard form. After that i have got errors [see the picture below]: So.. i click OK. And then try to run the RoR application from NetBeans clicking on the run-button and i got the following error in the log-panel: /home/ses/.rvm/rubies/ruby-1.9.2-p136/bin/ruby: No such file or directory -- script/server (LoadError) So how to handle these two problems? and, replying the comment to my question. yes, i performed following commands: bundle install Using rake (0.8.7) Using abstract (1.0.0) Using activesupport (3.0.3) Using builder (2.1.2) Using i18n (0.5.0) Using activemodel (3.0.3) Using erubis (2.6.6) Using rack (1.2.1) Using rack-mount (0.6.13) Using rack-test (0.5.7) Using tzinfo (0.3.24) Using actionpack (3.0.3) Using mime-types (1.16) Using polyglot (0.3.1) Using treetop (1.4.9) Using mail (2.2.15) Using actionmailer (3.0.3) Using arel (2.0.7) Using activerecord (3.0.3) Using activeresource (3.0.3) Using bundler (1.0.10) Using mysql2 (0.2.6) Using thor (0.14.6) Using railties (3.0.3) Using rails (3.0.3) p.s. my application is working when i launch it from the console. i use ruby-1.9.2 and RoR 3.0 and Netbeans 6.9.1 and Ubuntu 10.10 bundle pack Using rake (0.8.7) Using abstract (1.0.0) Using activesupport (3.0.3) Using builder (2.1.2) Using i18n (0.5.0) Using activemodel (3.0.3) Using erubis (2.6.6) Using rack (1.2.1) Using rack-mount (0.6.13) Using rack-test (0.5.7) Using tzinfo (0.3.24) Using actionpack (3.0.3) Using mime-types (1.16) Using polyglot (0.3.1) Using treetop (1.4.9) Using mail (2.2.15) Using actionmailer (3.0.3) Using arel (2.0.7) Using activerecord (3.0.3) Using activeresource (3.0.3) Using bundler (1.0.10) Using mysql2 (0.2.6) Using thor (0.14.6) Using railties (3.0.3) Using rails (3.0.3) Updating .gem files in vendor/cache Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed. Updating .gem files in vendor/cache

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  • Google OAuthGetRequestToken returns "signature_invalid"

    - by M Schenkel
    Trying for hours to get a request token using Google OAuthGetRequestToken but it always returns "signature_invalid". For a test I use the oAuth Playground to successfully request the token. Here are the results: Signature base string GET&https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthGetRequestToken&oauth_callback%3Dhttp%253A%252F%252Fgooglecodesamples.com%252Foauth_playground%252Findex.php%26oauth_consumer_key%3Dwww.embeddedanalytics.com%26oauth_nonce%3D56aa884162ed21815a0406725c79cf79%26oauth_signature_method%3DRSA-SHA1%26oauth_timestamp%3D1321417095%26oauth_version%3D1.0%26scope%3Dhttps%253A%252F%252Fwww.google.com%252Fanalytics%252Ffeeds%252F Request/Response GET /accounts/OAuthGetRequestToken?scope=https%3A%2F%2Fwww.google.com%2Fanalytics%2Ffeeds%2F HTTP/1.1 Host: www.google.com Accept: */* Authorization: OAuth oauth_version="1.0", oauth_nonce="56aa884162ed21815a0406725c79cf79", oauth_timestamp="1321417095", oauth_consumer_key="www.embeddedanalytics.com", oauth_callback="http%3A%2F%2Fgooglecodesamples.com%2Foauth_playground%2Findex.php", oauth_signature_method="RSA-SHA1", oauth_signature="qRtorIaSFaQdOXW1u6eMQlY9LT2j7ThG5kgkcD6rDcW4MIvzluslFgYRNTuRvnaruraNpItjojtgsrK9deYRKoHBGOlU27SsWy6jECxKczcSECl3cVAcjk7dvbywFMDkgi1ZhTZ5Q%2BFoD60HoVQUYnGUbOO0jPXI48LfkiA5ZN4%3D" HTTP/1.1 200 OK Content-Type: text/plain; charset=UTF-8 Date: Wed, 16 Nov 2011 04:18:15 GMT Expires: Wed, 16 Nov 2011 04:18:15 GMT Cache-Control: private, max-age=0 X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Content-Length: 118 Server: GSE oauth_token=4%2FmO86qZzixayI2NoUc-hewC--D53R&oauth_token_secret=r0PReF9D83w1d6uP0nyQQm9c&oauth_callback_confirmed=true I am using Fiddler to trace my calls. It returns the Signature base string: GET&https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthGetRequestToken&oauth_callback%3Dhttp%253A%252F%252Fgooglecodesamples.com%252Foauth_playground%252Findex.php%26oauth_consumer_key%3Dwww.embeddedanalytics.com%26oauth_nonce%3Dl9Jydzjyzt2fJfM3ltY5yrxxYy2uh1U7%26oauth_signature_method%3DRSA-SHA1%26oauth_timestamp%3D1321417107%26oauth_version%3D1.0%26scope%3Dhttps%253A%252F%252Fwww.google.com%252Fanalytics%252Ffeeds%252F Aside from the oauth_timestamp and oauth_nonce (which should be different), the base string are pretty much identical. Anyone know what I am doing wrong? Update 11/20/2011 Thinking it might be something wrong with my RSA-SHA signing, I have since tried HMAC-SHA. It gives the same results. I thought it might be beneficial to include the Fiddler results (I added carriage returns to have it format better). GET https://www.google.com/accounts/OAuthGetRequestToken? scope=https%3A%2F%2Fwww.google.com%2Fanalytics%2Ffeeds%2F HTTP/1.1 Content-Type: application/x-www-form-urlencoded Authorization: OAuth oauth_version="1.0", oauth_nonce="7C4C900EAACC9C7B62E399A91B81D8DC", oauth_timestamp="1321845418", oauth_consumer_key="www.embeddedanalytics.com", oauth_signature_method="HMAC-SHA1", oauth_signature="ows%2BbFTNSR8jVZo53rGBB8%2BfwFM%3D" Host: www.google.com Accept: */* Accept-Encoding: identity Response HTTP/1.1 400 Bad Request Content-Type: text/plain; charset=UTF-8 Date: Mon, 21 Nov 2011 03:16:57 GMT Expires: Mon, 21 Nov 2011 03:16:57 GMT Cache-Control: private, max-age=0 X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Content-Length: 358 Server: GSE signature_invalid base_string:GET&https%3A%2F%2Fwww.google.com%2Faccounts%2FOAuthGetRequestToken &oauth_consumer_key%3Dwww.embeddedanalytics.com %26oauth_nonce%3D7C4C900EAACC9C7B62E399A91B81D8DC %26oauth_signature_method%3DHMAC-SHA1 %26oauth_timestamp%3D1321845418 %26oauth_version%3D1.0 %26scope%3Dhttps%253A%252F%252Fwww.google.com%252Fanalytics%252Ffeeds%252F

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  • Caching in mmap

    - by myahya
    I am using mmap call to read from a very big file using simple pointer arithmetic in C++. The problem is that when I read small chunks of data (in the order of KBs) multiple times, each read take the same amount of time as the previous one. How can I know if the disk is being accessed to fulfill my request or whether the request is being fulfilled from main memory (page cache) in calls after the first one.

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  • Disable Back Button (showing cached version) without JavaScript

    - by vigna hari karthik
    Hey Friends, I want to disable the broswer back button without using javascript. So far i have used this coding: Response.CacheControl = "no-cache" Response.CacheControl = "private" Response.CacheControl = "public" It's working fine in the internet explorer 8 but in case of mozilla fire fox it is not working.pls say same the solution to work in all browsers. Thanks in advance With Regards V.karthik

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  • Page expiration after postback in ASP.NET

    - by Achilles
    I've been doing web development for a while and have yet to read a good answer to this question: Given a page that executes transactions through a postback, how do you prevent the user from duplicating the transaction when they do something as simple as hit the back button? I've explored trying expire the cache but I must admit I'm lacking in my understanding of ASP.NET caching. What is the approach I should use to make the old request stale and invalid? Thanks!

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  • CakePHP ACL Issue: Max_Join_Size

    - by Mayank
    Hi, The build_acl action works on localhost but on the shared sever it gives the following error: Warning (512): SQL Error: 1104: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET SQL_MAX_JOIN_SIZE=# if the SELECT is okay [CORE/cake/libs/model/datasources/dbo_source.php, line 549] I cannot change the MAX_JOIN_SIZE value because of the lack of admin privileges. I read in some forum that deleting cache solves the problem, but even that's not working for me. Thanks, Mayank

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  • How to implement service layer in Zend Framework?

    - by takeshin
    I'm looking for some good resources to learn how to implement internal service layer in Zend Framework. This is interesting post, but with no concrete code samples. Where to put service classes (/application/modules/modulename/services/?); How to autoload them (custom autoloader?) Most common services (user, authentication, cart, cache, feed?) Sample implementations (any github repos?) Good practices?

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  • Making sure a web page is not cached, across all browsers.

    - by Edward Wilde
    Our investigations have shown us that not all browsers respect the http cache directives in a uniform manner. For security reasons we do not want certain pages in our application to cached, ever, by the web browser. This must work for at least the following browsers: Internet Explorer versions 6-8 FireFox versions 1.5 - 3.0 Safari version 3 Opera 9 Our requirement came from a security test. After logging out from our website you could press the back button and view cached pages.

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  • apc.cache_by_default with CodeIgniter

    - by Dennis
    I'm trying to use APC (Alternative PHP Cache) on my localhost with wamp 2, PHP 5.3 and CodeIgniter 1.7.2, however If I turn on cache_by_default and enable apc.stat the server will crash and I get the following error: [apc-error] Cannot redeclare class ci_benchmark in C:\wamp\www\k\mvc\codeigniter\Common.php on line 127. What can I do to fix this issue?

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  • How to locally test Django's Sites Framework

    - by Off Rhoden
    Django has the sites framework to support multiple web site hosting from a single Django installation. EDIT (below is an incorrect assumption of the system) I understand that middleware sets the settings.SITE_ID value based on a lookup/cache of the request domain. ENDEDIT But when testing locally, I'm at http://127.0.0.1:8000/, not http://my-actual-domain.com/ How do I locally view my different sites during development?

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  • How to save data between calls to a IHttpHandler?

    - by bartek
    I have a IHttpHandler that acts as a source to a jQuery Autocomplete input field. In the constructor of the handler I generate an index that remains fairly static between request (needs to be rebuilt maybe once a day). How can I cache the the index between calls? Debugging indicates that the constructor is called for each request. I've set IsReusable to "false".

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  • windows phone deserialization json

    - by user2042227
    I have a weird issue. so I am making a few calls in my app to a webservice, which replies with data. However I am using a token based login system, so the first time the user enters the app I get a token from the webservice to login for that specific user and that token returns only that users details. The problem I am having is when the user changes I need to make the calls again, to get the new user's details, but using visual studio's breakpoint debugging, it shows the new user's token making the call however the problem is when the json is getting deserialized, it is as if it still reads the old data and deserializes that, when I exit my app with the new user it works fine, so its as if it is reading cached values, but I have no idea how to clear it? I am sure the new calls are being made and the problem lies with the deserializing, but I have tried clearing the values before deserializing them again, however nothing works. am I missing something with the json deserializer, how van I clear its cached values? here I make the call and set it not to cache so it makes a new call everytime: client.Headers[HttpRequestHeader.CacheControl] = "no-cache"; var token_details = await client.DownloadStringTaskAsync(uri); and here I deserialize the result, it is at this section the old data gets shown, so the raw json being shown inside "token_details" is correct, only once I deserialize the token_details, it shows the wrong data. deserialized = JsonConvert.DeserializeObject(token_details); and the class I am deserializing into is a simple class nothing special happening here, I have even tried making the constructor so that it clears the values each time it gets called. public class test { public string status { get; set; } public string name{ get; set; } public string birthday{ get; set; } public string errorDes{ get; set; } public test() { status = ""; name= ""; birthday= ""; errorDes= ""; } } uri's before making the calls: {https://whatever.co.za/token/?code=BEBCg==&id=WP7&junk=121edcd5-ad4d-4185-bef0-22a4d27f2d0c} - old call "UBCg==" - old reply {https://whatever.co.za/token/?code=ABCg==&id=WP7&junk=56cc2285-a5b8-401e-be21-fec8259de6dd} - new call "UBCg==" - new response which is the same response as old call as you can see i did attach a new GUID everytime i make the call, but then the new uri is read before making the downloadstringtaskasync method call, but it returns with the old data

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