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  • Spring-mvc project can't select from a particular mysql table

    - by Dan Ray
    I'm building a Spring-mvc project (using JPA and Hibernate for DB access) that is running just great locally, on my dev box, with a local MySQL database. Now I'm trying to put a snapshot up on a staging server for my client to play with, and I'm having trouble. Tomcat (after some wrestling) deploys my war file without complaint, and I can get some response from the application over the browser. When I hit my main page, which is behind Spring Security authentication, it redirects me to the login page, which works perfectly. I have Security configured to query the database for user details, and that works fine. In fact, a change to a password in the database is reflected in the behavior of the login form, so I'm confident it IS reaching the database and querying the user table. Once authenticated, we go to the first "real" page of the app, and I get a "data access failure" error. The server's console log gets this line (redacted): ERROR org.hibernate.util.JDBCExceptionReporter - SELECT command denied to user 'myDbUser'@'localhost' for table 'asset' However, if I go to MySQL from the shell using exactly the same creds, I have no problem at all selecting from the asset table: [development@tomcat01stg]$ mysql -u myDbUser -pmyDbPwd dbName ... mysql> \s -------------- mysql Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1 Connection id: 199 Current database: dbName Current user: myDbUser@localhost ... UNIX socket: /var/lib/mysql/mysql.sock -------------- mysql> select count(*) from asset; +----------+ | count(*) | +----------+ | 19 | +----------+ 1 row in set (0.00 sec) I've broken down my MySQL access settings, cleaned out the user and re-run the grant commands, set up a version of the user from 'localhost' and another from '%', making sure to flush permissions.... Nothing is changing the behavior of this thing. What gives?

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  • iPhone always assigned wrong ip

    - by Ashley Ray
    for some reason most of the time my iPhone connects to the home network the ip address seems wrongly assigned as it 'loses connection' even even with strong reception. If I change the ip address to a static from 168.2.10 to 168.2.15 works fine until it appears to renew back to the prior. I am using a power-plug extender from the modem to router. Then have a laptop Printer playstation tv and another iPhone that always connect fine. The modem also has a crappy wireless which I haven't connected any devices to. I'm sure the forum will have a simple answer!

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  • HTTP 401 error in Windows Authentication disappears after swapping Providers

    - by Ray Cheng
    The IIS 7 on Windows 2008 R2 is acting really weird. We deploy our web apps as web sites with appcmd.exe. After they are deployed, if I browse to them, I'll get HTTP 401 errors. The web sites are only have Windows Authentication enabled and the providers are Negotiate and NTLM in such order. But if I swap the providers, the HTTP 401 error goes away. Even if I swap it back, the errors are still gone. So the order of the providers doesn't seem to matter, what matters is the swapping. It must have triggered something. Even if we delete the web site and application pool and reinstall the web sites, the errors are still gone. So far, we can't reproduce it easily since it happens randomly. Has anyone experienced this? How do I go about to troubleshoot it?

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  • Seeking a solution to automatically copy files from the cd-rom disk to the USB drive once it's connected.

    - by Ray Nathan
    I plan to distribute a free CD that automatically copies files to a connected usb device. This process will be done on the computers of the users that obtain the cd. The CD will contain an autorun.ini file that will instruct the computer to copy a set of files located on the cd..to a specific directory on the connected usb device. The usb drive letter is not the same on all the systems, therefore...Windows XP should automatically know the drive letter of the usb device before the copy operation begins. What would be the best way of creating a short batch file or script that I can place on the CD to execute this process? Also, please note that it is NOT feasible or recommended to include a batch file on the USB devices to sync this operation due to the explanation at the beginning of this paragraph. :) Thank You All

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  • Outlook Registry Key Damaged; Tried "Fix It" and lost everything

    - by Ray
    My outlook 2007 (on Windows 7 64 bit) worked fine for two weeks. I then installed a printer/scanner/copier and the Outlook Window wouldn't open. I went to Microsoft's website and found a page that said my registry key was damaged. The page had a link to a Fix It program. I ran the program and it looks like all my Outlook data was wiped out. Can I get the data back? For future reference, how should I protect myself if the key goes bad again? Do you think I should unistall Outlook and re-install?

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  • OWA 2003 404 error only for calender

    - by ray
    We have a exchange 2003 published through isa 2006 , for every user this is working fine except one who receives a 404 error every time they try and view details of the calender, I have cloned their account which work's fine. How do I troubleshoot or resolve this?

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  • In Excel format number with optional decimal places

    - by Ray
    Simple: I have numbers in cells in excel. I want the numbers formatted so that if they have decimal places they show to a maximum of 2DP and if they have no decimal places it doesn't show any. For example. 15 should be formatted as 15 NOT 15.00 14.3453453 should be formatted as 14.35 12.1 should be formatted as 12.1 0 should be formatted as 0 The closest custom format code I've come up with is 0.##. Unfortunately this formats 15.00 as 15. (note the extra decimal place). Edit: To further complicate the issues, the spreadsheet is a result of an export from SQL Server Reporting Services. So no macros are possible. Oh well, it looks like 0.## is my best bet, and they can just live with the extra period.

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  • Automating the installation using SSH

    - by RAY
    I am running a bash script from a remote host to run a binary file which installs 64 bit JDK 6 update 29 on multiple VMs across the Environment. It is installing the file but, at the last line i have to hit a enter to complete the installation. I want to fully automate the script where i do not have to hit the enter at the last line. This is what i am using ssh ${V_TIERS}@${V_TIERS} 'cd JDK; sh jdk-6u29-solaris-sparcv9.sh' It updates as desired, but during install i have to hit enter to continue and complete the installation. Can anybody please help to fully automate the update process.

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  • What does the NTFS encryption protect against?

    - by Ray
    I have encrypted a folder from the (PropertiesAdvancedEncrypt contents to secure data). However when I change my user profile to another one which is also an administrator the folder seems to be accessible as if nothing happened. What exactly does this encryption protect against. I'm looking to encrypt folders that no other user, or another OS or even if the HDD were to be removed and plugged to another device will be accessible. My OS is Windows 7 Ultimate. Any suggestions?

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  • 11 Types of Developers

    - by Lee Brandt
    Jack Dawson Jack Dawson is the homeless drifter in Titanic. At one point in the movie he says, “I figure life’s a gift, and I don’t intend on wasting it.” He is happy to wander wherever life takes him. He works himself from place to place, making just enough money to make it to his next adventure. The “Jack Dawson” developer clings on to any new technology as the ‘next big thing’, and will find ways to shoe-horn it in to places where it is not a fit. He is very appealing to the other developers because they want to try the newest techniques and tools too, He will only stay until the new technology either bores him or becomes problematic. Jack will also be hard to find once the technology has been implemented, because he will be on to the next shiny thing. However, having a Jack Dawson on your team can be beneficial. Jack can be a great ally when attempting to convince a stodgy, corporate entity to upgrade. Jack usually has an encyclopedic recall of all the new features of the technology upgrade and is more than happy to interject them in any conversation. Tom Smykowski Tom is the neurotic employee in Office Space, and is deathly afraid of being fired. He will do only what is necessary to keep the status quo. He believes as long as nothing changes, his job is safe. He will scoff at anything new and be the naysayer during any change initiative. Tom can be useful in off-setting Jack Dawson. Jack will constantly be pushing for change and Tom will constantly be fighting it. When you see that Jack is getting kind of bored with a new technology and Tom has finally stopped wetting himself at the mere mention of it, then it is probably the sweet spot of beginning to implement that new technology (providing it is the right tool for the job). Ray Consella Ray is the guy who built the Field of Dreams. He took a risk. Sometimes he screwed it up, but he knew he didn’t want to end up regretting not attempting it. He constantly doubted himself, but he knew he had to keep going. Granted, he was doing what the voices in his head were telling him to do, but my point is he was driven to do something that most people considered crazy. Even when his friends, his wife and even he told himself he was crazy, somewhere inside himself, he knew it was the right thing to do. These are the innovators. These are the Bill Gates and Steve Jobs of the world. The take risks, they fail, they learn and the get better. Obviously, this kind of person thrives in start-ups and smaller companies, but that is due to their natural aversion to bureaucracy. They want to see their ideas put into motion quickly, and withdrawn quickly if it doesn’t work. Short feedback cycles are essential to Ray. He wants to know if his idea is working or not. He wants to modify or reverse his idea if it is not working or makes things worse. These are the agilistas. May I always be one.

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  • The application called an interface that was marshalled for a different thread

    - by X-Ray
    i'm writing a delphi app that communicates with excel. one thing i noticed is that if i call the Save method on the Excel workbook object, it can appear to hang because excel has a dialog box open for the user. i'm using the late binding. i'd like for my app to be able to notice when Save takes several seconds and then take some kind of action like show a dialog box telling this is what's happening. i figured this'd be fairly easy. all i'd need to do is create a thread that calls Save and have that thread call Excel's Save routine. if it takes too long, i can take some action. procedure TOfficeConnect.Save; var Thread:TOfficeHangThread; begin // spin off as thread so we can control timeout Thread:=TOfficeSaveThread.Create(m_vExcelWorkbook); if WaitForSingleObject(Thread.Handle, 5 {s} * 1000 {ms/s})=WAIT_TIMEOUT then begin Thread.FreeOnTerminate:=true; raise Exception.Create(_('The Office spreadsheet program seems to be busy.')); end; Thread.Free; end; TOfficeSaveThread = class(TThread) private { Private declarations } m_vExcelWorkbook:variant; protected procedure Execute; override; procedure DoSave; public constructor Create(vExcelWorkbook:variant); end; { TOfficeSaveThread } constructor TOfficeSaveThread.Create(vExcelWorkbook:variant); begin inherited Create(true); m_vExcelWorkbook:=vExcelWorkbook; Resume; end; procedure TOfficeSaveThread.Execute; begin m_vExcelWorkbook.Save; end; i understand this problem happens because the OLE object was created from another thread (absolutely). how can i get around this problem? most likely i'll need to "re-marshall" for this call somehow... any ideas? thank you!

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  • unittest import error with virtualenv + google-app-engine-django

    - by Ray Yun
    I'm working with google-app-engine-django + zipped django. Just running "python manage.py test" succeeded without error. But with virtualenv, test was failed with "import unittest error". same error with Django 1.1. - OSX 10.5.6 - google-app-engine-django (r101 via svn) : r100 was failed with launcher 1.3.0 - GoogleAppLauncher 1.3.0 - Django 1.1 & 1.1.1 (zipped) : both failed - virtualenv 1.4.5 - virtualenvwrapper 1.24 Error Message: (django_appengine)Reiot:warclouds Reiot$ python manage.py test WARNING:root:Could not read datastore data from /var/folders/UZ/UZ1vQeLFH2ShHk4kIiLcFk+++TI/-Tmp-/django_google-app-engine-django.datastore INFO:root:zipimporter('/Volumes/data/Documents/warclouds/django.zip', 'django/core/serializers/') .WARNING:root:Can't open zipfile /Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg: IOError: [Errno 13] file not accessible: '/Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg' WARNING:root:Can't open zipfile /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg: IOError: [Errno 13] file not accessible: '/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg' ERROR:root:Exception encountered handling request Traceback (most recent call last): File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 3177, in _HandleRequest self._Dispatch(dispatcher, self.rfile, outfile, env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 3120, in _Dispatch base_env_dict=env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 515, in Dispatch base_env_dict=base_env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2379, in Dispatch self._module_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2289, in ExecuteCGI reset_modules = exec_script(handler_path, cgi_path, hook) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2185, in ExecuteOrImportScript exec module_code in script_module.__dict__ File "/Volumes/data/Documents/warclouds/main.py", line 28, in <module> from appengine_django import InstallAppengineHelperForDjango File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1914, in load_module return self.FindAndLoadModule(submodule, fullname, search_path) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1816, in FindAndLoadModule description) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1767, in LoadModuleRestricted description) File "/Volumes/data/Documents/warclouds/appengine_django/__init__.py", line 44, in <module> import unittest ImportError: No module named unittest INFO:root:"GET / HTTP/1.1" 500 - INFO:root:zipimporter('/Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg', '') INFO:root:zipimporter('/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg', '') F........................................................... ====================================================================== FAIL: a request to the default page works in the dev_appserver ---------------------------------------------------------------------- Traceback (most recent call last): File "/Volumes/data/Documents/warclouds/appengine_django/tests/integration_test.py", line 176, in testBasic self.assertEquals(rv.status_code, 200) AssertionError: 500 != 200 I also tried with console import but it was ok. > which python /Users/Reiot/.virtualenvs/django_appengine/bin/python > python >>> import unittest Here is my environments: $ mkvirtualenv --no-site-packages no-django $ mkvirtualenv --no-site-packages django-1.1 $ mkvirtualenv --no-site-packages django-1.1.1 (django-1.1)$ easy_install Django-1.1.tar (django-1.1.1)$ easy_install Django-1.1.1.tar $ mkdir google-app-engine-django-svn $ cp -r google-app-engine-django-svn google-app-engine-django-svn-django-1.1 // copy appropriate django.zip $ cp -r google-app-engine-django-svn google-app-engine-django-svn-django-1.1.1 // copy appropriate django.zip

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  • Delphi 2009 MS Build headaches

    - by X-Ray
    does anyone know of any good description of delphi's build system? (i know it's using MS Build.) i'm using delphi 2009. i wanted to set up a variation of the Debug build configuration that (often) has different defines (d2009 seems to call them "preprocessor symbols"). the problem i'm having is that--even though i turned off "inherit" for "Base" and "Debug"--have only very limited control. for example, i can't get rid of FastMM_. <PropertyGroup> <ProjectGuid>{D7FE7347-8E2C-438C-A275-38B8DA9244B0}</ProjectGuid> <ProjectVersion>12.0</ProjectVersion> <MainSource>oca.dpr</MainSource> <Config Condition="'$(Config)'==''">Debug</Config> <DCC_DCCCompiler>DCC32</DCC_DCCCompiler> </PropertyGroup> <PropertyGroup Condition="'$(Config)'=='Base' or '$(Base)'!=''"> <Base>true</Base> </PropertyGroup> <PropertyGroup Condition="'$(Config)'=='Release' or '$(Cfg_1)'!=''"> <Cfg_1>true</Cfg_1> <CfgParent>Base</CfgParent> <Base>true</Base> </PropertyGroup> <PropertyGroup Condition="'$(Config)'=='Debug' or '$(Cfg_2)'!=''"> <Cfg_2>true</Cfg_2> <CfgParent>Base</CfgParent> <Base>true</Base> </PropertyGroup> <PropertyGroup Condition="'$(Base)'!=''"> <DCC_StringChecks>off</DCC_StringChecks> <DCC_MinimumEnumSize>4</DCC_MinimumEnumSize> <DCC_RangeChecking>true</DCC_RangeChecking> <DCC_IntegerOverflowCheck>true</DCC_IntegerOverflowCheck> <DCC_UNIT_PLATFORM>false</DCC_UNIT_PLATFORM> <DCC_SYMBOL_PLATFORM>false</DCC_SYMBOL_PLATFORM> <DCC_DcuOutput>.\dcu</DCC_DcuOutput> <DCC_UnitSearchPath>C:\Prj\Lib\AutoQADocking\Delphi2009.Win32\Lib;$(BDS)\Source\DUnit\src;$(DCC_UnitSearchPath)</DCC_UnitSearchPath> <DCC_Optimize>false</DCC_Optimize> <DCC_DependencyCheckOutputName>oca.exe</DCC_DependencyCheckOutputName> <DCC_ImageBase>00400000</DCC_ImageBase> <DCC_UnitAlias>WinTypes=Windows;WinProcs=Windows;DbiTypes=BDE;DbiProcs=BDE;DbiErrs=BDE;$(DCC_UnitAlias)</DCC_UnitAlias> <DCC_Platform>x86</DCC_Platform> <DCC_E>false</DCC_E> <DCC_N>false</DCC_N> <DCC_S>false</DCC_S> <DCC_F>false</DCC_F> <DCC_K>false</DCC_K> </PropertyGroup> <PropertyGroup Condition="'$(Cfg_1)'!=''"> <DCC_PentiumSafeDivide>true</DCC_PentiumSafeDivide> <DCC_Optimize>true</DCC_Optimize> <DCC_IntegerOverflowCheck>false</DCC_IntegerOverflowCheck> <BRCC_Defines>MadExcept;FastMM;$(BRCC_Defines)</BRCC_Defines> <DCC_AssertionsAtRuntime>false</DCC_AssertionsAtRuntime> <DCC_LocalDebugSymbols>false</DCC_LocalDebugSymbols> <DCC_Define>RELEASE;$(DCC_Define)</DCC_Define> <DCC_SymbolReferenceInfo>0</DCC_SymbolReferenceInfo> <DCC_DebugInformation>false</DCC_DebugInformation> </PropertyGroup> <PropertyGroup Condition="'$(Cfg_2)'!=''"> <DCC_DebugInfoInExe>true</DCC_DebugInfoInExe> <BRCC_Defines>FastMM</BRCC_Defines> <DCC_DebugDCUs>true</DCC_DebugDCUs> <DCC_MapFile>3</DCC_MapFile> <DCC_Define>DEBUG;FastMM_;madExcept;$(DCC_Define)</DCC_Define> </PropertyGroup> i even had to edit it today with notepad to get rid of a DCC define that the delphi UI doesn't seem to give access to. (it said "From Delphi Compiler" for the item i couldn't remove.) does anyone know a good primer on the use of this feature in delphi? thank you!

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  • How to access Google Maps API v3 marker's DIV and it's pixel position?

    - by Ray Yun
    Instead of google maps api's default info window, I'm going to use other jquery tooltip plugin over marker. So I need to get marker's DIV and its pixel position. But couldn't get it because there are no id or class for certain marker. Only I can access map canvas div from marker object and undocumented pixelBounds object. How can I access marker's DIV? Where can I get DIV's pixel position? Can I convert lat-lng position to pixel values?

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  • Java apache poi setting the cell formula

    - by Ray
    I am try to set a cell formulat that references cells from other workbooks. However, when I open the programmatically generated workbook, the formula cells show up as #REF!. I print out the formulas that were generated in a log. If I cut and paste those into the cells, the numbers from the external workbooks is pulled in. String formula = "'C:\\tmp\\ForecastAggregate\\Total Products\\[ForecastWorksheet.xls]2010 Budget'!C10"; HSSFCell cell = row.createCell(0); //row was created above cell.setCellFormula(formula); Can anybode help?

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  • Simple comet example using php and jquery

    - by Ray
    I have searched on google for hours without finding a good and simple example of the comet technique using PHP. I just need an example that uses a persistent HTTP connection or something similar. I dont want to use a polling technique because I have something like that set up and not only is it difficult to work with and manage its a big hog of resources. Also I am using IIS7 not Apache. A good example would be really helpful so I can move on from this ugly polling technique. ,Thanks

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  • appstats broken filename in callstack

    - by Ray Yun
    When I visit appstats page and expand callstack, the file path has <path[N]> prefix. So click the file link then emit no such file or directory error. Stack: /google/appengine/datastore/datastore_rpc.py:951 make_rpc_call() /google/appengine/datastore/datastore_query.py:993 _make_query_result_rpc_call() /google/appengine/datastore/datastore_query.py:714 run_async() /google/appengine/datastore/datastore_query.py:685 run() /google/appengine/api/datastore.py:1281 GetBatcher() /google/appengine/api/datastore.py:1351 Get() /google/appengine/ext/db/init.py:1831 fetch() /google/appengine/ext/db/init.py:1778 get() /apps/fbapp/fbutil.py:232 oauth_load_fb_user() /apps/fbapp/fbutil.py:84 require_account() the error message for appengine source: [Errno 2] No such file or directory: u'/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/ipaddr/google/appengine/datastore/datastore_rpc.py' the error message for my source: IOError [Errno 2] No such file or directory: u'/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/antlr3/apps/fbapp/fbutil.py' I guess this was path problem and found some official comment from google. If your request handlers modify sys.path, you must make the same modifications to sys.path in appengine_config.py so the Appstats web interface can see all files. Actually I'm using appengine_django and two path was inserted to sys.path. I did it same again at appengine_django.py but also failed. Maybe some custom setting with appengine_config.py can solve this problem but doesn't figure out how to fix it. What can I do?

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  • UIButton doesn't listen to content mode setting?

    - by Dan Ray
    firstButton is a UIButton of type Custom. I'm programmatically putting three of them across each cell of a table, thusly: [firstButton setImage:markImage forState:UIControlStateNormal]; [firstButton setContentMode:UIViewContentModeScaleAspectFit]; [cell.contentView addSubview:firstButton]; Elsewhere, I'm telling it to clipToBounds. What I get is a crop of the center square of the image, rather than an aspect-scaled rendering of it. I've tried this lots of ways, including setting the mode property on firstButton.imageView, which also doesn't seem to work.

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  • Silverlight ItemsControl with Alternating ItemTemplate

    - by Ray Booysen
    Silverlight does not support Alternating Item Templates in an ItemsControl. I have a few ideas in mind as to how to accomplish this, but to avoid polluting the potential answers, I'll leave them out. If you had to design a method of providing alternating templates (and I mean a full data template) for an ItemsControl, how would you accomplish this.

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  • Memory Troubles with UIImagePicker

    - by Dan Ray
    I'm building an app that has several different sections to it, all of which are pretty image-heavy. It ties in with my client's website and they're a "high-design" type outfit. One piece of the app is images uploaded from the camera or the library, and a tableview that shows a grid of thumbnails. Pretty reliably, when I'm dealing with the camera version of UIImagePickerControl, I get hit for low memory. If I bounce around that part of the app for a while, I occasionally and non-repeatably crash with "status:10 (SIGBUS)" in the debugger. On low memory warning, my root view controller for that aspect of the app goes to my data management singleton, cruises through the arrays of cached data, and kills the biggest piece, the image associated with each entry. Thusly: - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Low Memory Warning" message:@"Cleaning out events data" delegate:nil cancelButtonTitle:@"All right then." otherButtonTitles:nil]; [alert show]; [alert release]; NSInteger spaceSaved; DataManager *data = [DataManager sharedDataManager]; for (Event *event in data.eventList) { spaceSaved += [(NSData *)UIImagePNGRepresentation(event.image) length]; event.image = nil; spaceSaved -= [(NSData *)UIImagePNGRepresentation(event.image) length]; } NSString *titleString = [NSString stringWithFormat:@"Saved %d on event images", spaceSaved]; for (WondrMark *mark in data.wondrMarks) { spaceSaved += [(NSData *)UIImagePNGRepresentation(mark.image) length]; mark.image = nil; spaceSaved -= [(NSData *)UIImagePNGRepresentation(mark.image) length]; } NSString *messageString = [NSString stringWithFormat:@"And total %d on event and mark images", spaceSaved]; NSLog(@"%@ - %@", titleString, messageString); // Relinquish ownership any cached data, images, etc that aren't in use. } As you can see, I'm making a (poor) attempt to eyeball the memory space I'm freeing up. I know it's not telling me about the actual memory footprint of the UIImages themselves, but it gives me SOME numbers at least, so I can see that SOMETHING'S happening. (Sorry for the hamfisted way I build that NSLog message too--I was going to fire another UIAlertView, but realized it'd be more useful to log it.) Pretty reliably, after toodling around in the image portion of the app for a while, I'll pull up the camera interface and get the low memory UIAlertView like three or four times in quick succession. Here's the NSLog output from the last time I saw it: 2010-05-27 08:55:02.659 EverWondr[7974:207] Saved 109591 on event images - And total 1419756 on event and mark images wait_fences: failed to receive reply: 10004003 2010-05-27 08:55:08.759 EverWondr[7974:207] Saved 4 on event images - And total 392695 on event and mark images 2010-05-27 08:55:14.865 EverWondr[7974:207] Saved 4 on event images - And total 873419 on event and mark images 2010-05-27 08:55:14.969 EverWondr[7974:207] Saved 4 on event images - And total 4 on event and mark images 2010-05-27 08:55:15.064 EverWondr[7974:207] Saved 4 on event images - And total 4 on event and mark images And then pretty soon after that we get our SIGBUS exit. So that's the situation. Now my specific questions: THE time I see this happening is when the UIPickerView's camera iris shuts. I click the button to take the picture, it does the "click" animation, and Instruments shows my memory footprint going from about 10mb to about 25mb, and sitting there until the image is delivered to my UIViewController, where usage drops back to 10 or 11mb again. If we make it through that without a memory warning, we're golden, but most likely we don't. Anything I can do to make that not be so expensive? Second, I have NSZombies enabled. Am I understanding correctly that that's actually preventing memory from being freed? Am I subjecting my app to an unfair test environment? Third, is there some way to programmatically get my memory usage? Or at least the usage for a UIImage object? I've scoured the docs and don't see anything about that.

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  • Doesn't [UIWindow addSubView:] retain?

    - by Dan Ray
    Check it: NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSLog(@"Checking login--user value is %@", [defaults valueForKey:@"userID"]); if ([defaults valueForKey:@"userID"] == NULL){ LoginViewController *loginController = [[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil]; [window addSubview:loginController.view]; [loginController release]; } else { [window addSubview:[navigationController view]]; } Every other place when I put a subview into another view, I release that view after I've done that, because it's now owned by the view it's a subview of. HERE, though, when I do [loginController release], every IBAction on that loginController gets called against a deallocated instance. Commenting out that line makes everything work. I note the difference in approach between my loginController and the navigationController that came with the template; the navigationController is a synthesized property that gets released in -(void)dealloc{ }, so it's still around after being put into window.

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