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  • Dynamically create and save image with Django and PIL/Django-Photologue

    - by Travis
    I want to generate a page of html with dynamic content and then save the result as an image as well as display the page to the user. So, user signs up to attend conference and gives their name and org. That data is combined with html/css elements to show what their id badge for the conference will look like (their name and org on top of our conference logo background) for preview. Upon approval, the page is saved on the server to an image format (PNG, PDF or JPG) to be printed onto a physical badge by an admin later. I am using Django and django-photologue powered by PIL. The view might look like this # app/views.py def badgepreview(request, attendee_id): u = User.objects.get(id=attendee_id) name = u.name org = u.org return render_to_response('app/badgepreview.html', {'name':name,'org':org,}, context_instance = RequestContext(request), ) The template could look like this {# templates/app/badgepreview.html #} {% extends "base.html" %} {% block page_body %} <div style='background:url(/site_media/img/logo_bg.png) no-repeat;'> <h4>{{ name }}</h4> <h4>{{ org }}</h4> </div> {% endblock %} simple, but how do I save the result? Or is there a better way to get this done?

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  • css - set max-width for select

    - by Patrick
    I have a form with a drop down list of venues and a submit button. They are supposed to be on the same line, but since the list of venues is dynamic, it could become too long and push the button down. I was thinking of setting a max-width property to the select, but I'm not clear whether this will work in all browsers. Do you have any suggestions on a workaround? form action="http://localhost/ci-llmg/index.php/welcome/searchVenueForm" method="post" class="searchform"><select name="venue"> <option value="0" selected="selected">Select venue...</option> <option value="1">venue 0</option> <option value="2">club 1</option> <option value="3">disco 2</option> <option value="4">future test venue</option> </select> <input type="submit" name="" value="Show venue!" class="submitButton" /> </form> css: .searchform select { max-width: 320px; } .searchform input.submitButton { float: right; }

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  • Netbeans / persistence API error

    - by Danny
    I am following this tutorial, I'm using netbeans 6.5.1 http://www.netbeans.org/kb/docs/java/gui-db-custom.html When I get to the part where I create the "new entity class from database", which is in the "Customizing the Master/Detail View" section of the tutoiral. I can't ever compile because I get this error in the task list (and I get a runtime error when I run)... Atleast I think these two are related. Error Named queries can be defined only on an Entity or MappedSuperclass class. Countries.java 27 C:/Users/Danny/dev/NetBeansProjects/Test/src/test Error Named queries can be defined only on an Entity or MappedSuperclass class. Products.java 28 C:/Users/Danny/dev/NetBeansProjects/Test/src/test note that all I do is do newentity classes from database, and do exactly as the tutorial says. I stopped on the tutoral at the "Adding Dialog Boxes" heading, because the tutorial writer says the application should be "partially functional" which makes me think it should atleast RUN. I haven't edited the generated code outside of what I've been instructed to do. This is the output produced by the netbeans output console: run: Jun 23, 2009 3:03:23 PM org.jdesktop.application.Application$1 run SEVERE: Application class test.TestApp failed to launch javax.persistence.PersistenceException: No Persistence provider for EntityManager named MyBusinessRecordsPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory: oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Local Exception Stack: Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7 Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143) at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at test.TestView.initComponents(TestView.java:337) at test.TestView.(TestView.java:39) at test.TestApp.startup(TestApp.java:19) at org.jdesktop.application.Application$1.run(Application.java:171) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Caused by: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:643) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.callPredeploy(JavaSECMPInitializer.java:171) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:239) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:255) at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:155) ... 14 more Caused by: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:228) ... 19 more Caused by: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.ValidationException.invalidMapping(ValidationException.java:1069) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataValidator.throwInvalidMappingEncountered(MetadataValidator.java:275) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.OneToManyAccessor.process(OneToManyAccessor.java:161) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.RelationshipAccessor.processRelationship(RelationshipAccessor.java:290) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.processRelationshipDescriptors(MetadataProject.java:579) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.process(MetadataProject.java:512) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.processAnnotations(MetadataProcessor.java:246) at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:370) at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:607) ... 18 more The following providers: oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider Returned null to createEntityManagerFactory. at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at test.TestView.initComponents(TestView.java:337) at test.TestView.(TestView.java:39) at test.TestApp.startup(TestApp.java:19) at org.jdesktop.application.Application$1.run(Application.java:171) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Exception in thread "AWT-EventQueue-0" java.lang.Error: Application class test.TestApp failed to launch at org.jdesktop.application.Application$1.run(Application.java:177) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named MyBusinessRecordsPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory: oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Local Exception Stack: Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@11b86e7 Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(PersistenceUnitLoadingException.java:143) at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:169) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at test.TestView.initComponents(TestView.java:337) at test.TestView.(TestView.java:39) at test.TestApp.startup(TestApp.java:19) at org.jdesktop.application.Application$1.run(Application.java:171) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Caused by: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:643) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.callPredeploy(JavaSECMPInitializer.java:171) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:239) at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:255) at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.createEntityManagerFactory(EntityManagerFactoryProvider.java:155) ... 14 more Caused by: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException Exception Description: predeploy for PersistenceUnit [MyBusinessRecordsPU] failed. Internal Exception: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:228) ... 19 more Caused by: Exception [TOPLINK-7244] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: An incompatible mapping has been encountered between [class test.Products] and [class test.Orders]. This usually occurs when the cardinality of a mapping does not correspond with the cardinality of its backpointer. at oracle.toplink.essentials.exceptions.ValidationException.invalidMapping(ValidationException.java:1069) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataValidator.throwInvalidMappingEncountered(MetadataValidator.java:275) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.OneToManyAccessor.process(OneToManyAccessor.java:161) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.RelationshipAccessor.processRelationship(RelationshipAccessor.java:290) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.processRelationshipDescriptors(MetadataProject.java:579) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProject.process(MetadataProject.java:512) at oracle.toplink.essentials.internal.ejb.cmp3.metadata.MetadataProcessor.processAnnotations(MetadataProcessor.java:246) at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:370) at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:607) ... 18 more The following providers: oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider Returned null to createEntityManagerFactory. at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:154) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83) at test.TestView.initComponents(TestView.java:337) at test.TestView.(TestView.java:39) at test.TestApp.startup(TestApp.java:19) at org.jdesktop.application.Application$1.run(Application.java:171) ... 8 more BUILD SUCCESSFUL (total time: 2 seconds) I'm thinking my netbeans application must be misconfigured or something, I can't seem to find anyone with the same problem as myself

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  • "Admin module" taking over [Yii framework]

    - by Flavius
    Hi I have an "admin" module and I want it to serve "dynamic controllers", i.e. to provide a default behaviour for controllers which don't really exist ("virtual controllers"). I've invented a lightweight messaging mechanism for loose communication between modules. I'd like to use it such that when e.g. ?r=admin/users/index is requested, it will call the "virtual controller" "UserController" of AdminModule, which would, by default, use this messaging mechanism to notify the real module "UsersModule" it can answer to the request. I thought about simulating this behaviour in AdminModule::init(), but at that point I have no way of deciding whether the action can be processed by a real controller or not, or at least I don't know how to do it. This is because of the way Yii works: bottom-up, the controller is the one that renders the view AND the application layout (or the module's, if it exists), for example. I don't think the module even has a word to say about handling a given controller+action or not. To recap, I'm looking for a kind of CWebModule::missingController($controllerId,$actionId), just like CController::missingAction($actionId), or a workaround to simulate that. That would possibly be in CWebModule::init() or somewhere where I can find out whether the controller actually exists, in which case it's his job to handle it the $actionID and $controllerID whether the module $controllerID exists (I didn't type it wrong, in r=admin/users/index, "users" is the actual module, as specified in the application's config).

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  • Help with stock ticker style scrolling using Core Animation

    - by Glen Harding
    Hi, I'm looking for some guidance on the best way to implement stock ticker style right-to-left scrolling of CALayers in Core Animation on OSX. I'm pretty new to Cocoa and don't know the best way to implement this. I have a continuous stream of news items and stock details that I turn into CALayers (made up of 1 image and a CATextLayer) and I want to animate the CALayers from right to left of my custom view. The news and stock information is constantly updating so I would like to add 1 item at a time to the view, scroll it right to left until the right-most point of the CALayer is showing, then add another CALayer to the view and start scrolling that as well. I would like to do this dynamic updating instead of taking a big snapshot of all my data, turning it into a big horizontal CALayer and scrolling that. I'm looking for guidance on how to achieve this sort of effect - do I manually animate each new CALayer along a path in the view? Or should I be using CAScrollLayer to achieve this effect? Many thanks Glen.

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  • How do I use jquery validate remote validation on a field that depends on another field in the form?

    - by Kevin J
    I have a form in which I am using remote validation to check if an email address already exists in the database. However, the catch is that on this form, the user can select between several different "groups", and each group has its own distinct set of email addresses (thus the same email can exist once in each group). The group selection is a dropdown on the form, and the email address is an input field with remote validation. I have a couple issues. First, I have set up my remote rule like this: remote: { url: 'remote_script.php', data: { group_id: $('select.group_id').val() } } However, this seems to statically set the group_id parameter to whatever the first value in the select is. Meaning, if I change the select, then trigger the remote validation again, the group_id parameter does not change First, how can I make this parameter dynamic, depending on the value of a select in the form? Secondly, how do I manually trigger the remote validation on the email address field? When the group_id select is changed, I want to re-trigger the remote validation on the email address field (without changing the value of the field). I tried using $(selector).validate().element('.email_addr') But this appears to only trigger the standard validation (required, email), and not the remote call.

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  • C# Design How to Elegantly wrap a DAL class

    - by guazz
    I have an application which uses MyGeneration's dOODads ORM to generate it's Data Access Layer. dOODad works by generating a persistance class for each table in the database. It works like so: // Load and Save Employees emps = new Employees(); if(emps.LoadByPrimaryKey(42)) { emps.LastName = "Just Got Married"; emps.Save(); } // Add a new record Employees emps = new Employees(); emps.AddNew(); emps.FirstName = "Mr."; emps.LastName = "dOOdad"; emps.Save(); // After save the identity column is already here for me. int i = emps.EmployeeID; // Dynamic Query - All Employees with 'A' in thier last name Employees emps = new Employees(); emps.Where.LastName.Value = "%A%"; emps.Where.LastName.Operator = WhereParameter.Operand.Like; emps.Query.Load(); For the above example(i.e. Employees DAL object) I would like to know what is the best method/technique to abstract some of the implementation details on my classes. I don't believe that an Employee class should have Employees(the DAL) specifics in its methods - or perhaps this is acceptable? Is it possible to implement some form of repository pattern? Bear in mind that this is a high volume, perfomacne critical application. Thanks, j

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  • Ext3 fs: Block bitmap for group 1 not in group (block 0). is fs dead?

    - by ip
    Hi, My company has a server with one big partition with Mysql database and php files. Now this partition seems to be corrupted, as reported from kernel messages when I tried to mount it manually: [329862.817837] EXT3-fs error (device loop1): ext3_check_descriptors: Block bitmap for group 1 not in group (block 0)! [329862.817846] EXT3-fs: group descriptors corrupted! I've tried to recovery it running tools from a PLD livecd. These are the tools I have tested: - e2retrieve - testdisk - photorec - dd_rescue/dd_rhelp - ddrescue - fsck.ext2 - e2salvage without any success. dumpe2fs 1.41.3 (12-Oct-2008) Filesystem volume name: /dev/sda3 Last mounted on: <not available> Filesystem UUID: dd51610b-6de0-4392-a6f3-67160dbc0343 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal filetype sparse_super Default mount options: (none) Filesystem state: not clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 9502720 Block count: 18987570 Reserved block count: 949378 Free blocks: 11555345 Free inodes: 11858398 First block: 0 Block size: 4096 Fragment size: 4096 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 16384 Inode blocks per group: 512 Last mount time: Wed Mar 24 09:31:03 2010 Last write time: Mon Apr 12 11:46:32 2010 Mount count: 10 Maximum mount count: 30 Last checked: Thu Jan 1 01:00:00 1970 Check interval: 0 (<none>) Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 128 Journal inode: 8 Journal backup: inode blocks dumpe2fs: A block group is missing an inode table while reading journal inode There's any other tools I have to test before considering these disk definitely unrecoverable? Many thanks, ip

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  • [C#] Lock a file and avoid readings while it's writing

    - by vtortola
    Hi, My web application returns a file from the filesystem. These files are dynamic, so I have no way to know the names o how many of them will there be. When this file doesn't exist, the application creates it from the database. I want to avoid that two different threads recreate the same file at the same time, or that a thread try to return the file while other thread is creating it. So I want to lock a file till its recreation is complete, if other thread try to access it ... it will have to wait the file be unlocked. I've been reading about FileStream.Lock, but I have to know the file length and it won't prevent that other thread try to read the file, so it doesn't work for my particular case. I've been reading also about FileAccess.None, but it will throw an exception (which exception type?) if other thread/process try to access the file... so I should develop a "try again while is faulting" ... and I don't like too much that approach, although maybe there is not a better way. How could I archieve this? Kind regards.

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  • How to break WinDbg in an anonymous method?

    - by Richard Berg
    Title kinda says it all. The usual SOS command !bpmd doesn't do a lot of good without a name. Some ideas I had: dump every method, then use !bpmd -md when you find the corresponding MethodDesc not practical in real world usage, from what I can tell. Even if I wrote a macro to limit the dump to anonymous types/methods, there's no obvious way to tell them apart. use Reflector to dump the MSIL name doesn't help when dealing with dynamic assemblies and/or Reflection.Emit. Visual Studio's inability to read local vars inside such scenarios is the whole reason I turned to Windbg in the first place... set the breakpoint in VS, wait for it to hit, then change to Windbg using the noninvasive trick attempting to detach from VS causes it to hang (along with the app). I think this is due to the fact that the managed debugger is a "soft" debugger via thread injection instead of a standard "hard" debugger. Or maybe it's just a VS bug specific to Silverlight (would hardly be the first I've encountered). set a breakpoint on some other location known to call into the anonymous method, then single-step your way in my backup plan, though I'd rather not resort to it if this Q&A reveals a better way

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  • How to Lock a file and avoid readings while it's writing

    - by vtortola
    My web application returns a file from the filesystem. These files are dynamic, so I have no way to know the names o how many of them will there be. When this file doesn't exist, the application creates it from the database. I want to avoid that two different threads recreate the same file at the same time, or that a thread try to return the file while other thread is creating it. So I want to lock a file till its recreation is complete, if other thread try to access it ... it will have to wait the file be unlocked. I've been reading about FileStream.Lock, but I have to know the file length and it won't prevent that other thread try to read the file, so it doesn't work for my particular case. I've been reading also about FileAccess.None, but it will throw an exception (which exception type?) if other thread/process try to access the file... so I should develop a "try again while is faulting" ... and I don't like too much that approach, although maybe there is not a better way.

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  • How can I copy a SQL record which has related records in other tables to the same database?

    - by DerekVS
    Hi. I created a function in C# which allows me to copy a record and its related children to a new record and new related children in the same database. (This is for an application that allows the use of previous work as a template for new work.) Anyway, it works great... Here's a description of how it accomplishes the copy: It populates a two-column memory-based look-up table with the current primary key of each record. Next, as it individually creates each new copy record, it updates the look-up table with the Identity PK of the new record [retrieved from SCOPE_IDENTITY()]. Now, when it copies over any related children, it can look up the new parent PK to set the FK on the new record. In testing, it only took a minute to copy a relational structure on a local instance of SQL Server 2005 Express Edition. Unfortunately it is proving to be horribly slow in production! My users are dealing with 60,000+ records per parent record over the LAN to our SQL Server! While my copy function still works, each of those records represents an individual SQL UPDATE command and it loads the SQL Server at about 17% CPU from its normal 2% idle. I just finished testing a 50,000 record copy and it took almost 20 minutes! Is there a way to duplicate this functionality in SQL queries or stored procecures to make the SQL server do all of the copy work instead of blasting it over the LAN from each client? (We're running Microsoft SQL Server 2005 Standard Edition.) Thanks! -Derek

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  • How can I use external expressions in Linq with EF4 (and LINQKit)?

    - by neo
    I want to separate out often used expressions in linq queries. I'm using Entity Framework 4 and also LINQKit but I still don't know how I should do it the right way. Let me give you an example: Article article = dataContainer.Articles.FirstOrDefault(a => a.Id == id); IEnumerable<Comment> comments = (from c in container.Comments where CommentExpressions.IsApproved.Invoke(c) select c); public static class CommentExpressions { public static Expression<Func<Module, bool>> IsApproved { get { return m => m.IsApproved; } } } Of course the IsApproved expression would be something much more complicated. The problem is that the Invoke() won't work because I didn't call .asExpandable() from LINQKit on container.Comments but I can't call it because it's just an ICollection instead of an ObjectSet. So my question is: Do I always have to go through the data context when I want to include external expressions or can I somehow use it on the object I fetched (Article)? Any ideas or best practices? Thanks very much! neo

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  • ASP.Net Entity Framework, objectcontext error

    - by Chris Klepeis
    I'm building a 4 layered ASP.Net web application. The layers are: Data Layer Entity Layer Business Layer UI Layer The entity layer has my data model classes and is built from my entity data model (edmx file) in the datalayer using T4 templates (POCO). The entity layer is referenced in all other layers. My data layer has a class called SourceKeyRepository which has a function like so: public IEnumerable<SourceKey> Get(SourceKey sk) { using (dmc = new DataModelContainer()) { var query = from SourceKey in dmc.SourceKeys select SourceKey; if (sk.sourceKey1 != null) { query = from SourceKey in query where SourceKey.sourceKey1 == sk.sourceKey1 select SourceKey; } return query; } } Lazy loading is disabled since I do not want my queries to run in other layers of this application. I'm receiving the following error when attempting to access the information in the UI layer: The ObjectContext instance has been disposed and can no longer be used for operations that require a connection. I'm sure this is because my DataModelContainer "dmc" was disposed. How can I return this IEnumerable object from my data layer so that it does not rely on the ObjectContext, but solely on the DataModel? Is there a way to limit lazy loading to only occur in the data layer?

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  • css: Cross-browser, reflowing, top-to-bottom, multi-column lists

    - by Sai Emrys
    See http://cssfingerprint.com/about#stats. See also http://stackoverflow.com/questions/933645/multi-column-css-lists. I want a multi-column list that: uses no JS reflows on window size makes as many columns as fit the enclosing element therefore, does not require batching the list into manual column groups works in all browsers works for an arbitrary number of unknown-width (but single-line-height) elements makes each column fit the width of its (dynamic) contents does not create scrollbars or other overflow issues is sorted top to bottom where possible My code is currently: ul.multi, ol.multi { width: 100%; margin: 0; padding: 0; list-style: none; -moz-column-width: 12em; -webkit-column-width: 12em; column-width: 12em; -moz-column-gap: 1em; -webkit-column-gap: 1em; column-gap: 1em; } ul.multi li, ol.multi li { <!--[if IE]> float: left; <![endif]--> width: 20em; margin: 0; padding: 0; } Although this works okay, it has some problems: I have to guess the content width it is right-to-left in IE (though this is acceptable as a graceful degradation mode) it won't work at all in non-IE, non-Moz/Webkit/CSS3 browsers How can this be improved?

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  • How to call SQL Function with multiple parameters from C# web page

    - by Marshall
    I have an MS SQL function that is called with the following syntax: SELECT Field1, COUNT(*) AS RecordCount FROM GetDecileTable('WHERE ClientID = 7 AND LocationName = ''Default'' ', 10) The first parameter passes a specific WHERE clause that is used by the function for one of the internal queries. When I call this function in the front-end C# page, I need to send parameter values for the individual fields inside of the WHERE clause (in this example, both the ClientID & LocationName fields) The current C# code looks like this: String SQLText = "SELECT Field1, COUNT(*) AS RecordCount FROM GetDecileTable('WHERE ClientID = @ClientID AND LocationName = @LocationName ',10)"; SqlCommand Cmd = new SqlCommand(SQLText, SqlConnection); Cmd.Parameters.Add("@ClientID", SqlDbType.Int).Value = 7; // Insert real ClientID Cmd.Parameters.Add("@LocationName", SqlDbType.NVarChar(20)).Value = "Default"; // Real code uses Location Name from user input SqlDataReader reader = Cmd.ExecuteReader(); When I do this, I get the following code from SQL profiler: exec sp_executesql N'SELECT Field1, COUNT(*) as RecordCount FROM GetDecileTable (''WHERE ClientID = @ClientID AND LocationName = @LocationName '',10)', N'@ClientID int,@LocationID nvarchar(20)', @ClientID=7,@LocationName=N'Default' When this executes, SQL throws an error that it cannot parse past the first mention of @ClientID stating that the Scalar Variable @ClientID must be defined. If I modify the code to declare the variables first (see below), then I receive an error at the second mention of @ClientID that the variable already exists. exec sp_executesql N'DECLARE @ClientID int; DECLARE @LocationName nvarchar(20); SELECT Field1, COUNT(*) as RecordCount FROM GetDecileTable (''WHERE ClientID = @ClientID AND LocationName = @LocationName '',10)', N'@ClientID int,@LocationName nvarchar(20)', @ClientID=7,@LocationName=N'Default' I know that this method of adding parameters and calling SQL code from C# works well when I am selecting data from tables, but I am not sure how to embed parameters inside of the ' quote marks for the embedded WHERE clause being passed to the function. Any ideas?

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  • unable to get tooltip to work when usingjQuery load() content

    - by user281867
    Hi, I am having problem getting my tooltip to work when using the jQuery load() function. The tooltip works fine if i don't use load() to load external dynamic data. I googled and found the i may need to use live(), but I can't figure how to get it to work. Any suggestion? thank you!! Here is my scripts: function loadEMERContent(uid) { $("#ActionEWPNBook").load("ajaxLoadDATA.cfm?uid="+uid, null, showLoading); $("#EWPNBookloading").html(''); } function showLoading() { $("#EWPNBookloading").html(''); } function simple_tooltip(target_items, name){ $(target_items).each(function(i){ $("body").append(""+$(this).attr('title')+""); var my_tooltip = $("#"+name+i); $(this).removeAttr("title").mouseover(function(){ my_tooltip.css({opacity:0.8, display:"none"}).stop().fadeIn(400); }).mousemove(function(kmouse){ my_tooltip.css({left:kmouse.pageX+15, top:kmouse.pageY+15}); }).mouseout(function(){ my_tooltip.stop().fadeOut(400); }); }); } Here is my ajaxLoadDATA.cfm: Date Hours Modify Date #dateformat(vdate, "mm/dd/yyyy")##dateformat(vdate, "mm/dd/yyyy")# #hours# #dateformat(posted, "mm/dd/yyyy")#  ACTIONS:    Add    Edit    Cancel

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  • Export to Excel from ASP.NET produces files unreadable with Excel Viewer

    - by MainMa
    Hi, I want to output some dynamic data from an ASP.NET website to Excel. I found that the easiest way which does not require to use Excel XML or to install Excel on server machine is to output data as a table and specify application/vnd.ms-excel type. The problem is when I do so and try to open the file in Excel Viewer, I receive the following error message: Microsoft Excel Viewer cannot open files of this type. Then nothing is opened. Even an easiest code such as: protected void Page_Load(object sender, EventArgs e) { Response.Clear(); Response.Buffer = true; HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=Example.xls"); Response.ContentType = "application/vnd.ms-excel"; StringWriter stringWriter = new System.IO.StringWriter(); HtmlTextWriter htmlTextWriter = new System.Web.UI.HtmlTextWriter(stringWriter); dataGrid.RenderControl(htmlTextWriter); Response.Write("<html><body><table><tr><td>A</td><td>B</td></tr><tr><td>C</td><td>D</td></tr></table></body></html>"); Response.End(); } produces the same error. What can cause such behavior? Is it because the Viewer cannot read such files, but full Excel version can?

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  • Finding most efficient transmission size in varying network latency scenarios

    - by rwmnau
    I'm building a .NET remoting client/server that will be transmitting thousands of files, of varying sizes (everything from a few bytes to hundreds of MB), and I'm curious about a general method for finding the appropriate transmission size. As I see it, there's the following tradeoff: Serialize entire file into a transmission object and transmit at once, regardless of size. This would be the fastest, but a failure during tranmission requires that the whole file be re-transmitted. If the file size is larger than something small (like 4KB), break it into 4KB chunks and transmit those, re-assembling on the server. In addition to the complexity of this, it's slower because of continued round-trips and acknowledgements, though a failure of any one piece doesn't waste much time. The ideal transmission method (when taking into account negotiation latency vs. failure rate) is somewhere in between, and I'm wondering about how to find out the best size for that particular client. Do I have some dynamic tuning step in my transmission that looks at the current bytes/second average, and then raises the transmission size until the speed starts to drop (failures overwhelm negotiation cost)? Or is there some other method for determining ideal transmission size? The application will be multi-threaded, so number of threads also factors in to the calculation. I'm not looking for a formula (though I'll take one if you've got it), but just what to consider as I create this process.

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  • The LoadLibraryA method returns error code 1114 (ERROR_DLL_INIT_FAILED) after more than 1000 cycles

    - by Javier
    Hi, I'm programing on C++, I'm using Visual Studio 2008, Windows XP, and I have the following problem: My application, that is a DLL that can be used from Python, loads an external dll, uses the required methods, and then unloads this external Dll. It's working properly, but after more than 1000 cycles the method "LoadLibraryA" returns a NULL reference. The main steps are: HINSTANCE h = NULL; h = LoadLibraryA(dllfile.c_str()); DWORD dw = GetLastError(); The error got is: ERROR_DLL_INIT_FAILED 1114 (0x45A) A dynamic link library (DLL) initialization routine failed. The Dll is unloaded by using the following: FreeLibrary(mDLL); mDLL = NULL; Where mDLL is defined like this: HINSTANCE mDLL; First alternative tried: Just load the Dll only once, and unloaded it when the application ends. This fix the problem but introduces a new one. When the application ends, instead of first executing the DllMain method of my applicaion, wich unloads the external DLL, is executing first the DllMain method of the other Dll. This cause the following error because my application is trying to unload a Dll that was unload by itself previously. "Unhandled exception at 0x04a00d07 (DllName.DLL) in Python.exe: 0xC0000005: Access violation reading location 0x0000006b". Any suggestion will be welcomed. Thanks in advance. Regards.

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  • Why is OracleDataAdapter.Fill() Very Slow?

    - by John Gietzen
    I am using a pretty complex query to retrieve some data out of one of our billing databases. I'm running in to an issue where the query seems to complete fairly quickly when executed with SQL Developer, but does not seem to ever finish when using the OracleDataAdapter.Fill() method. I'm only trying to read about 1000 rows, and the query completes in SQL Developer in about 20 seconds. What could be causing such drastic differences in performance? I have tons of other queries that run quickly using the same function. Here is the code I'm using to execute the query: using Oracle.DataAccess.Client; ... public DataTable ExecuteExternalQuery(string connectionString, string providerName, string queryText) { DbConnection connection = null; DbCommand selectCommand = null; DbDataAdapter adapter = null; switch (providerName) { case "System.Data.OracleClient": case "Oracle.DataAccess.Client": connection = new OracleConnection(connectionString); selectCommand = connection.CreateCommand(); adapter = new OracleDataAdapter((OracleCommand)selectCommand); break; ... } DataTable table = null; try { connection.Open(); selectCommand.CommandText = queryText; selectCommand.CommandTimeout = 300000; selectCommand.CommandType = CommandType.Text; table = new DataTable("result"); table.Locale = CultureInfo.CurrentCulture; adapter.Fill(table); } finally { adapter.Dispose(); if (connection.State != ConnectionState.Closed) { connection.Close(); } } return table; } And here is the general outline of the SQL I'm using: with trouble_calls as ( select work_order_number, account_number, date_entered from work_orders where date_entered >= sysdate - (15 + 31) -- Use the index to limit the number of rows scanned and wo_status not in ('Cancelled') and wo_type = 'Trouble Call' ) select account_number, work_order_number, date_entered from trouble_calls wo where wo.icoms_date >= sysdate - 15 and ( select count(*) from trouble_calls repeat where wo.account_number = repeat.account_number and wo.work_order_number <> repeat.work_order_number and wo.date_entered - repeat.date_entered between 0 and 30 ) >= 1

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  • Sphinx PHP Geodist problems

    - by James
    Below is my PHP function to call nearby points using Sphinx for MySQL. There are hundreds of thousands of nearby points which to what I can tell, are being indexed by Sphinx, but simply fails silently when searching with Sphinx. Other Sphinx queries I run against other indexes work completely fine. function nearby($latitude, $longitude, $radius) { global $sphinx; $sphinx->SetMatchMode(SPH_MATCH_ALL); $sphinx->SetArrayResult(true); $sphinx->SetLimits(0, 1000); $sphinx->SetGeoAnchor('latitude', 'longitude', (float) deg2rad($latitude), (float) deg2rad($longitude)); $circle = (float) $radius * 1.609344; $sphinx->SetFilterFloatRange('@geodist', 0.0, $circle); $matches = $sphinx->Query('', 'geo'); return $matches; } $nearby = nearby($latitude, $longitude, 10000); var_dump($nearby); This, when called with valid latitude and longitude co-ords and a very large radius for debugging produces: bool(false) Below is my sphinx.conf covering the geo part: source geo { type = mysql sql_host = 127.0.0.1 sql_user = user sql_pass = pass sql_db = db sql_port = 3306 sql_query_pre = set names utf8 sql_query_pre = set session query_cache_type=OFF sql_query = SELECT id,city,region,country,radians(longitude) AS longitude, radians(latitude) AS latitude FROM points; sql_attr_float = longitude sql_attr_float = latitude sql_ranged_throttle = 0 sql_query_info = SELECT * FROM points WHERE id = $id } index geo { source = geo path = /var/data/geo docinfo = extern #mlock = 0 #morphology = none min_word_len = 1 charset_type = utf-8 #charset_table = 0..9, A..Z->a..z, _, a..z, U+410..U+42F->U+430..U+44F, U+430..U+44F ignore_chars = U+00AD html_strip = 0 enable_star = 0 } indexer { mem_limit = 1024M } searchd { port = 3312 log = /var/log/searchd.log query_log = /var/log/query.log read_timeout = 5 max_children = 5 pid_file = /var/log/searchd.pid max_matches = 10000 seamless_rotate = 1 preopen_indexes = 0 unlink_old = 1 }

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  • Defining reliable SIlverlight 4 architecture

    - by doteneter
    Hello everybody, It's my first question on SO. I know that there were many topics on Silverlight and architecture but didn't find answers that satisfies me. I'm ASP.NET MVC developer and are used to work on architectures built with the best practices (loose coupling with DI, etc.) Now I'm faced to the new Silverlight 4 project and would like to be sure I'm doing the best choices as I'm not experienced. Main features required by the applications are as follows : use existing SQL Server Database but with possibility to move to the cloud. using EF4 for the data acess with SQL Server. exitensibility : adding new modules without changing the main host. loose coupling. I was looking at different webcasts (Taulty, etc.), blogs about Silverlight and came up with the following architecture. EF 4 for data access (as specified with the requirements) WCF RIA Services for mid-tiers controling access to data for queries and enabling end-to-end support for data validation, authentication and roles. MEF Support for enabling modules. Unity 2.0 for DI. The problem is that I don't know how to define a reliable architecture where all these elements play well together. Should I use a framework instead like Prism or Caliburn? But for now I'm not sure what scenarios they support. What's the best usages for Unity in Silverlight ? I used to use IoC in ASP.NET MVC for loos coupling and other things like interception for audit logging. It seems that for Silverlight Unity doesn't support Interception. I would like to use it to enable loose coupling and to enable to move to the cloud if needed. Thanks in advance for your help.

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  • jquery form validation plugin need help?

    - by python
    </tr> for ($i = 0; $i < $dm_numrec; $i++) { ?> <tr> <td width="266" height="28" valign="top"> <input type="text" name="recommend_to_name<?php echo $i;?>" /> </td> <td height="28" valign="top"> <input type="text" name="recommend_to_email<?php echo $i;?> />" </td> </tr> I used jquery form validation plugin http://bassistance.de/jquery-plugins/jquery-plugin-validation/ <script src="jquery.min.js"></script> <script src="jquery.validate.min.js"></script> <script> $(document).ready(function(){ $('#recommend').validate({ 'rules':{ 'recommend_to_name':'required', 'recommend_to_email':{ 'required':true, 'email':true }, } }); }); </script> How can I validate for the recommend_to_name that its name is a dynamic string from loop: recommend_to_name0 recommend_to_name1 recommend_to_name2 recommend_to_name..

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  • Is there a perfect algorithm for chess?

    - by Overflown
    Dear Stack Overflow community, I was recently in a discussion with a non-coder person on the possibilities of chess computers. I'm not well versed in theory, but think I know enough. I argued that there could not exist a deterministic Turing machine that always won or stalemated at chess. I think that, even if you search the entire space of all combinations of player1/2 moves, the single move that the computer decides upon at each step is based on a heuristic. Being based on a heuristic, it does not necessarily beat ALL of the moves that the opponent could do. My friend thought, to the contrary, that a computer would always win or tie if it never made a "mistake" move (however do you define that?). However, being a programmer who has taken CS, I know that even your good choices - given a wise opponent - can force you to make "mistake" moves in the end. Even if you know everything, your next move is greedy in matching a heuristic. Most chess computers try to match a possible end game to the game in progress, which is essentially a dynamic programming traceback. Again, the endgame in question is avoidable though. -- thanks, Allan Edit: Hmm... looks like I ruffled some feathers here. That's good. Thinking about it again, it seems like there is no theoretical problem with solving a finite game like chess. I would argue that chess is a bit more complicated than checkers in that a win is not necessarily by numerical exhaustion of pieces, but by a mate. My original assertion is probably wrong, but then again I think I've pointed out something that is not yet satisfactorily proven (formally). I guess my thought experiment was that whenever a branch in the tree is taken, then the algorithm (or memorized paths) must find a path to a mate (without getting mated) for any possible branch on the opponent moves. After the discussion, I will buy that given more memory than we can possibly dream of, all these paths could be found.

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