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• WCF Data Service BeginSaveChanges not saving changes in Silverlight app

  - by Enigmativity

  I'm having a hell of a time getting WCF Data Services to work within Silverlight. I'm using the VS2010 RC. I've struggled with the cross domain issue requiring the use of clientaccesspolicy.xml & crossdomain.xml files in the web server root folder, but I just couldn't get this to work. I've resorted to putting both the Silverlight Web App & the WCF Data Service in the same project to get past this issue, but any advice here would be good. But now that I can actually see my data coming from the database and being displayed in a data grid within Silverlight I thought my troubles were over - but no. I can edit the data and the in-memory entity is changing, but when I call BeginSaveChanges (with the appropriate async EndSaveChangescall) I get no errors, but no data updates in the database. Here's my WCF Data Services code: public class MyDataService : DataService<MyEntities> { public static void InitializeService(DataServiceConfiguration config) { config.SetEntitySetAccessRule("*", EntitySetRights.All); config.SetServiceOperationAccessRule("*", ServiceOperationRights.All); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; } protected override void OnStartProcessingRequest(ProcessRequestArgs args) { base.OnStartProcessingRequest(args); HttpContext context = HttpContext.Current; HttpCachePolicy c = HttpContext.Current.Response.Cache; c.SetCacheability(HttpCacheability.ServerAndPrivate); c.SetExpires(HttpContext.Current.Timestamp.AddSeconds(60)); c.VaryByHeaders["Accept"] = true; c.VaryByHeaders["Accept-Charset"] = true; c.VaryByHeaders["Accept-Encoding"] = true; c.VaryByParams["*"] = true; } } I've pinched the OnStartProcessingRequest code from Scott Hanselman's article Creating an OData API for StackOverflow including XML and JSON in 30 minutes. Here's my code from my Silverlight app: private MyEntities _wcfDataServicesEntities; private CollectionViewSource _customersViewSource; private ObservableCollection<Customer> _customers; private void UserControl_Loaded(object sender, RoutedEventArgs e) { if (!System.ComponentModel.DesignerProperties.GetIsInDesignMode(this)) { _wcfDataServicesEntities = new MyEntities(new Uri("http://localhost:7156/MyDataService.svc/")); _customersViewSource = this.Resources["customersViewSource"] as CollectionViewSource; DataServiceQuery<Customer> query = _wcfDataServicesEntities.Customer; query.BeginExecute(result => { _customers = new ObservableCollection<Customer>(); Array.ForEach(query.EndExecute(result).ToArray(), _customers.Add); Dispatcher.BeginInvoke(() => { _customersViewSource.Source = _customers; }); }, null); } } private void button1_Click(object sender, RoutedEventArgs e) { _wcfDataServicesEntities.BeginSaveChanges(r => { var response = _wcfDataServicesEntities.EndSaveChanges(r); string[] results = new[] { response.BatchStatusCode.ToString(), response.IsBatchResponse.ToString() }; _customers[0].FinAssistCompanyName = String.Join("|", results); }, null); } The response string I get back data binds to my grid OK and shows "-1|False". My intent is to get a proof-of-concept working here and then do the appropriate separation of concerns to turn this into a simple line-of-business app. I've spent hours and hours on this. I'm being driven insane. Any ideas how to get this working?

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• WCF app Deployed on Win7 Machine and get connection refused error

  - by Belliez

  I have created a Sync Framework application based on the following sample from microsoft and deployed it to a new Windows 7 machine for testing. The app runs ok but when I attempt to communicate I get the following error: Could not connect to http://localhost:8000/RelationalSyncContract/SqlSyncService/. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8000. I am wondering if there is something I am missing. This is my first experience using WCF and followed microsoft sample code. I have disabled the firewall and opened port 8000 for both TCP and UDP. Not sure what to look at next. Below is my App.config file if this helps: <?xml version="1.0"?> <configuration> <system.web> <compilation debug="true"/> <httpRuntime maxRequestLength="32768" /> </system.web> <!-- When deploying the service library project, the content of the config file must be added to the host's app.config file. System.Configuration does not support config files for libraries. --> <system.serviceModel> <services> <service behaviorConfiguration="WebSyncContract.SyncServiceBehavior" name="WebSyncContract.SqlWebSyncService"> <endpoint address="" binding="wsHttpBinding" bindingConfiguration="largeMessageHttpBinding" contract="WebSyncContract.ISqlSyncContract"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> <host> <baseAddresses> <add baseAddress="http://localhost:8000/RelationalSyncContract/SqlSyncService/"/> </baseAddresses> </host> </service> </services> <bindings> <wsHttpBinding> <!-- We are using Server cert only.--> <binding name="largeMessageHttpBinding" maxReceivedMessageSize="204857600"> <readerQuotas maxArrayLength="1000000"/> </binding> </wsHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="WebSyncContract.SyncServiceBehavior"> <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment --> <serviceMetadata httpGetEnabled="True"/> <!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information --> <serviceDebug includeExceptionDetailInFaults="True"/> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> <startup><supportedRuntime version="v2.0.50727"/></startup></configuration> Thank you, your help is much appreciated.

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• Single django instance with subdomains for each app in the django project

  - by jwesonga

  I have a django project (django+apache+mod_wsgi+nginx) with multiple apps, I'd like to map each app as a subdomain: project/ app1 (domain.com) app2 (sub1.domain.com) app3 (sub3.domain.com) I have a single .wsgi script serving the project, which is stored in a folder /apache. Below is my vhost file. I'm using a single vhost file instead of separate ones for each sub-domain: <VirtualHost *:8080> ServerAdmin [email protected] ServerName www.domain.com ServerAlias domain.com DocumentRoot /home/path/to/app/ Alias /admin_media/ /usr/local/lib/python2.6/dist-packages/django/contrib/admin/media <Directory /home/path/to/wsgi/apache/> Order deny,allow Allow from all </Directory> LogLevel warn ErrorLog /home/path/to/logs/apache_error.log CustomLog /home/path/to/logs/apache_access.log combined WSGIDaemonProcess domain.com user=www-data group=www-data threads=25 WSGIProcessGroup domain.com WSGIScriptAlias / /home/path/to/apache/kcdf.wsgi </VirtualHost> <VirtualHost *:8081> ServerAdmin [email protected] ServerName sub1.domain.com ServerAlias sub1.domain.com DocumentRoot /home/path/to/app Alias /admin_media/ /usr/local/lib/python2.6/dist-packages/django/contrib/admin/media <Directory /home/path/to/wsgi/apache/> Order deny,allow Allow from all </Directory> LogLevel warn ErrorLog /home/path/to/logs/apache_error.log CustomLog /home/path/to/logs/apache_access.log combined WSGIDaemonProcess sub1.domain.com user=www-data group=www-data threads=25 WSGIProcessGroup sub1.domain.com WSGIScriptAlias / /home/path/to/apache/kcdf.wsgi </VirtualHost> My Nginx configuration for the domain.com: server { listen 80; server_name domain.com; access_log off; error_log off; # proxy to Apache 2 and mod_wsgi location / { proxy_pass http://127.0.0.1:8080/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } } Configuration for the sub.domain.com: server { listen 80; server_name sub.domain.com; access_log off; error_log off; # proxy to Apache 2 and mod_wsgi location / { proxy_pass http://127.0.0.1:8081/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } } This set up doesn't seem to work, everything seems to point to the main domain. I've tried http://effbot.org/zone/django-multihost.htm which kind of worked but seems to have issues with loading my css,images,js files.

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• app not working

  - by pranay

  hi, i have written a simple app which would speak out to the user any incoming message. Both programmes seem to work perfectly when i lauched them as two separate pgms , but on keeping them in the same project/package only the speaker programme screen is seen and the receiver pgm doesn't seem to work . Can someone please help me out on it? the speaker pgm is: package com.example.TextSpeaker; import java.util.Locale; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.speech.tts.TextToSpeech; import android.speech.tts.TextToSpeech.OnInitListener; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; // the following programme converts the msg user to speech public class TextSpeaker extends Activity implements OnInitListener { /** Called when the activity is first created. */ int MY_DATA_CHECK_CODE = 0; public TextToSpeech mtts; public Button button; //public EditText edittext; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); button = (Button)findViewById(R.id.button); //edit text=(EditText)findViewById(R.id.edittext); button.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { //mtts.speak(edittext.getText().toString(), TextToSpeech.QUEUE_FLUSH, null); Toast.makeText(getApplicationContext(), "The service has been started\n Every new message will now be read out", Toast.LENGTH_LONG).show(); } }); Intent myintent = new Intent(); myintent.setAction(TextToSpeech.Engine.ACTION_CHECK_TTS_DATA); startActivityForResult(myintent, MY_DATA_CHECK_CODE); } protected void onActivityResult(int requestcode,int resultcode,Intent data) { if(requestcode == MY_DATA_CHECK_CODE) { if(resultcode==TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) { // success so create the TTS engine mtts = new TextToSpeech(this,this); mtts.setLanguage(Locale.ENGLISH); } else { //install the Engine Intent install = new Intent(); install.setAction(TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA); startActivity(install); } } } public void onDestroy(Bundle savedInstanceStatBundle) { mtts.shutdown(); } public void onPause() { super.onPause(); // if our app has no focus if(mtts!=null) mtts.stop(); } @Override public void onInit(int status) { if(status==TextToSpeech.SUCCESS) button.setEnabled(true); } } and the Receiver programme is: package com.example.TextSpeaker; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.speech.tts.TextToSpeech; import android.telephony.SmsMessage; // supports both gsm and cdma import android.widget.Toast; public class Receiver extends BroadcastReceiver{ @Override public void onReceive(Context context, Intent intent) { Bundle bundle = intent.getExtras(); SmsMessage[] msgs = null; String str=""; if(bundle!=null) { // retrive the sms received Object[] pdus = (Object[])bundle.get("pdus"); msgs = new SmsMessage[pdus.length]; for(int i=0;i } } }

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• Android app hanging, sometimes until Force Close / Wait dialog appears

  - by fredley

  I'm making an app that records uncompressed (wav format) audio. I'm using this class to actually record the audio. Currently, my application records fine (I can play the file), however when I click the button to stop the recording, the app hangs for 10 seconds or so, with no log output or any signs of life. Finally it comes round, dumps a load of errors into the log, updates the UI etc. I'm using AsyncTasks to try and avoid this kind of thing but it's not working. Here's my code: //Called on clicks of the record button. rar is the instance of RehearsalAudioRecorder private OnClickListener RecordListener = new OnClickListener(){ @Override public void onClick(View v) { Log.d("Record","Click"); if (recording){ new stopRecordingTask().execute(rar,null,null); startStop.setText("Record"); statusBar.setText("Recording Finished, ready to Encode"); }else{ recording = true; new startRecordingTask().execute(rar,null,null); startStop.setText("Stop"); statusBar.setText("Recording Started"); } } }; private class startRecordingTask extends AsyncTask<RehearsalAudioRecorder,Void,Void>{ @Override protected Void doInBackground(RehearsalAudioRecorder... rs) { RehearsalAudioRecorder r = rs[0]; r.setOutputFile("/sdcard/rarOut.wav"); r.prepare(); r.start(); return null; } } private class stopRecordingTask extends AsyncTask<RehearsalAudioRecorder,Void,Void>{ @Override protected Void doInBackground(RehearsalAudioRecorder... rs) { RehearsalAudioRecorder r = rs[0]; r.stop(); r.reset(); return null; } } In Logcat, I always get output like this, which has me stumped. I have no idea what's causing it (I'm logging the RehearsalAudioRecorder class, and it's being started/stopped correctly by the button clicks. This output occurs after the log output for the button click and correct stop() method call) 12-19 11:59:11.172: ERROR/AudioRecord-JNI(22662): Unable to retrieve AudioRecord object, can't record 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): Error occured in updateListener, recording is aborted 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): stop() called on illegal state: STOPPED 12-19 11:59:11.172: ERROR/AudioRecord-JNI(22662): Unable to retrieve AudioRecord object, can't record 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): Error occured in updateListener, recording is aborted 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): stop() called on illegal state: ERROR 12-19 11:59:11.172: ERROR/AudioRecord-JNI(22662): Unable to retrieve AudioRecord object, can't record 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): Error occured in updateListener, recording is aborted 12-19 11:59:11.172: ERROR/uk.ac.cam.tfmw2.steg.RehearsalAudioRecorder(22662): stop() called on illegal state: ERROR ... 10 or more times I've been fiddling with this all day and I'm not getting anywhere, any input would be greatly appreciated. Update I've replace the AsyncTasks with Threads, still doesn't work, the app completely hangs when I click record, despite the fact the Log indicates there's nothing going on in the main thread. Still completely stumped.

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• Unicorn_init.sh cannot find app root on capistrano cold deploy

  - by oFca

  I am deploying Rails app and upon running cap deploy:cold I get the error saying * 2012-11-02 23:53:26 executing `deploy:migrate' * executing "cd /home/mr_deployer/apps/prjct_mngr/releases/20121102225224 && bundle exec rake RAILS_ENV=production db:migrate" servers: ["xxxxxxxxxx"] [xxxxxxxxxx] executing command command finished in 7464ms * 2012-11-02 23:53:34 executing `deploy:start' * executing "/etc/init.d/unicorn_prjct_mngr start" servers: ["xxxxxxxxxx"] [xxxxxxxxxx] executing command ** [out :: xxxxxxxxxx] /etc/init.d/unicorn_prjct_mngr: 33: cd: can't cd to /home/mr_deployer/apps/prjct_mngr/current; command finished in 694ms failed: "rvm_path=$HOME/.rvm/ $HOME/.rvm/bin/rvm-shell '1.9.3-p125@prjct_mngr' -c '/etc/init.d/unicorn_prjct_mngr start'" on xxxxxxxxxx but my app root is there! Why can't it find it? Here's part of my unicorn_init.sh file : 1 #!/bin/sh 2 set -e 3 # Example init script, this can be used with nginx, too, 4 # since nginx and unicorn accept the same signals 5 6 # Feel free to change any of the following variables for your app: 7 TIMEOUT=${TIMEOUT-60} 8 APP_ROOT=/home/mr_deployer/apps/prjct_mngr/current 9 PID=$APP_ROOT/tmp/pids/unicorn.pid 10 CMD="cd $APP_ROOT; bundle exec unicorn -D -c $APP_ROOT/config/unicorn.rb - E production" 11 # INIT_CONF=$APP_ROOT/config/init.conf 12 AS_USER=mr_deployer 13 action="$1" 14 set -u 15 16 # test -f "$INIT_CONF" && . $INIT_CONF 17 18 old_pid="$PID.oldbin" 19 20 cd $APP_ROOT || exit 1 21 22 sig () { 23 test -s "$PID" && kill -$1 `cat $PID` 24 } 25 26 oldsig () { 27 test -s $old_pid && kill -$1 `cat $old_pid` 28 } 29 case $action in 30 31 start) 32 sig 0 && echo >&2 "Already running" && exit 0 33 $CMD 34 ;; 35 36 stop) 37 sig QUIT && exit 0 38 echo >&2 "Not running" 39 ;; 40 41 force-stop) 42 sig TERM && exit 0 43 echo >&2 "Not running" 44 ;; 45 46 restart|reload) 47 sig HUP && echo reloaded OK && exit 0 48 echo >&2 "Couldn't reload, starting '$CMD' instead" 49 $CMD 50 ;; 51 52 upgrade) 53 if sig USR2 && sleep 2 && sig 0 && oldsig QUIT 54 then 55 n=$TIMEOUT 56 while test -s $old_pid && test $n -ge 0 57 do 58 printf '.' && sleep 1 && n=$(( $n - 1 )) 59 done 60 echo 61 62 if test $n -lt 0 && test -s $old_pid 63 then 64 echo >&2 "$old_pid still exists after $TIMEOUT seconds" 65 exit 1 66 fi 67 exit 0 68 fi 69 echo >&2 "Couldn't upgrade, starting '$CMD' instead" 70 $CMD 71 ;; 72 73 reopen-logs) 74 sig USR1 75 ;; 76 77 *) 78 echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>" 79 exit 1 80 ;; 81 esac

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• ImportError: No module named _sqlite3

  - by Chris R.

  I'm writing for the Google App Engine and my local tests are getting the following error: --> --> --> Traceback (most recent call last): File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 3185, in _HandleRequest self._Dispatch(dispatcher, self.rfile, outfile, env_dict) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 3128, in _Dispatch base_env_dict=env_dict) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 515, in Dispatch base_env_dict=base_env_dict) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2387, in Dispatch self._module_dict) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2297, in ExecuteCGI reset_modules = exec_script(handler_path, cgi_path, hook) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 2193, in ExecuteOrImportScript exec module_code in script_module.__dict__ File "C:\Users\Chris Reade\Documents\SI 182\Final\geneticsalesman\Final.py", line 7, in <module> from pyevolve import DBAdapters File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1922, in load_module return self.FindAndLoadModule(submodule, fullname, search_path) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1824, in FindAndLoadModule description) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1775, in LoadModuleRestricted description) File "C:\Users\Chris Reade\Documents\SI 182\Final\geneticsalesman\pyevolve\DBAdapters.py", line 21, in <module> import sqlite3 File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1922, in load_module return self.FindAndLoadModule(submodule, fullname, search_path) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1824, in FindAndLoadModule description) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1775, in LoadModuleRestricted description) File "C:\Python26\lib\sqlite3\__init__.py", line 24, in <module> from dbapi2 import * File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1922, in load_module return self.FindAndLoadModule(submodule, fullname, search_path) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1824, in FindAndLoadModule description) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1272, in Decorate return func(self, *args, **kwargs) File "C:\Program Files\Google\google_appengine\google\appengine\tools\dev_appserver.py", line 1775, in LoadModuleRestricted description) File "C:\Python26\lib\sqlite3\dbapi2.py", line 27, in <module> from _sqlite3 import * ImportError: No module named _sqlite3 My python direction has a lib file for sqlite3 but I can't tell why it can't find it. Any help would be greatly appreciated.

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• GoogleAppEngine : possible to disable FileUpload?

  - by James.Elsey

  Hi, When I deploy my application to GoogleAppEngine I keep getting the following error Uncaught exception from servlet java.lang.NoClassDefFoundError: java.io.FileOutputStream is a restricted class. Please see the Google App Engine developer's guide for more details. at com.google.apphosting.runtime.security.shared.stub.java.io.FileOutputStream.<clinit>(FileOutputStream.java) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:132) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468) at org.apache.log4j.LogManager.<clinit>(LogManager.java:122) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:88) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685) at org.springframework.web.context.ContextLoader.<clinit>(ContextLoader.java:146) at org.springframework.web.context.ContextLoaderListener.createContextLoader(ContextLoaderListener.java:53) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:44) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:243) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5485) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5483) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:398) at com.google.net.rpc.impl.Server$2.run(Server.java:852) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536) at com.google.net.rpc.impl.Server.startRpc(Server.java:807) at com.google.net.rpc.impl.Server.processRequest(Server.java:369) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:442) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:404) at java.lang.Thread.run(Unknown Source) I've checked the documentation and it suggests to create a FileUpload class, since I won't be uploading files/documents etc from my application, is this necessary? Is there a way to disable this functionality, or at least bypass this error? I have already provided implementation for a MultipartWrapperFactory.Class as that has been suggested from searching for this error Thanks

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• .Net Custom Configuration Section and Saving Changes within PropertyGrid

  - by Paul

  If I load the My.Settings object (app.config) into a PropertyGrid, I am able to edit the property inside the propertygrid and the change is automatically saved. PropertyGrid1.SelectedObject = My.Settings I want to do the same with a Custom Configuration Section. Following this code example (from here http://www.codeproject.com/KB/vb/SerializePropertyGrid.aspx), he is doing explicit serialization to disk when a "Save" button is pushed. Public Class Form1 'Load AppSettings Dim _appSettings As New AppSettings() Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click _appSettings = AppSettings.Load() ' Actually change the form size Me.Size = _appSettings.WindowSize PropertyGrid1.SelectedObject = _appSettings End Sub Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click _appSettings.Save() End Sub End Class In my code, my custom section Inherits from ConfigurationSection (see below) Question: Is there something built into ConfigurationSection class that does the autosave? If not, what is the best way to handle this, should it be in the PropertyGrid.PropertyValueChagned? (how does the My.Settings handle this internally?) Here is the example Custom Class that I am trying to get to auto-save and how I load into property grid. Dim config As System.Configuration.Configuration = _ ConfigurationManager.OpenExeConfiguration( _ ConfigurationUserLevel.None) PropertyGrid2.SelectedObject = config.GetSection("CustomSection") Public NotInheritable Class CustomSection Inherits ConfigurationSection ' The collection (property bag) that contains ' the section properties. Private Shared _Properties As ConfigurationPropertyCollection ' The FileName property. Private Shared _FileName As New ConfigurationProperty("fileName", GetType(String), "def.txt", ConfigurationPropertyOptions.IsRequired) ' The MasUsers property. Private Shared _MaxUsers _ As New ConfigurationProperty("maxUsers", _ GetType(Int32), 1000, _ ConfigurationPropertyOptions.None) ' The MaxIdleTime property. Private Shared _MaxIdleTime _ As New ConfigurationProperty("maxIdleTime", _ GetType(TimeSpan), TimeSpan.FromMinutes(5), _ ConfigurationPropertyOptions.IsRequired) ' CustomSection constructor. Public Sub New() _Properties = New ConfigurationPropertyCollection() _Properties.Add(_FileName) _Properties.Add(_MaxUsers) _Properties.Add(_MaxIdleTime) End Sub 'New ' This is a key customization. ' It returns the initialized property bag. Protected Overrides ReadOnly Property Properties() _ As ConfigurationPropertyCollection Get Return _Properties End Get End Property <StringValidator( _ InvalidCharacters:=" ~!@#$%^&*()[]{}/;'""|\", _ MinLength:=1, MaxLength:=60)> _ <EditorAttribute(GetType(System.Windows.Forms.Design.FileNameEditor), GetType(System.Drawing.Design.UITypeEditor))> _ Public Property FileName() As String Get Return CStr(Me("fileName")) End Get Set(ByVal value As String) Me("fileName") = value End Set End Property <LongValidator(MinValue:=1, _ MaxValue:=1000000, ExcludeRange:=False)> _ Public Property MaxUsers() As Int32 Get Return Fix(Me("maxUsers")) End Get Set(ByVal value As Int32) Me("maxUsers") = value End Set End Property <TimeSpanValidator(MinValueString:="0:0:30", _ MaxValueString:="5:00:0", ExcludeRange:=False)> _ Public Property MaxIdleTime() As TimeSpan Get Return CType(Me("maxIdleTime"), TimeSpan) End Get Set(ByVal value As TimeSpan) Me("maxIdleTime") = value End Set End Property End Class 'CustomSection

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• How to best design a date/geographic proximity query on GAE?

  - by Dane

  Hi all, I'm building a directory for finding athletic tournaments on GAE with web2py and a Flex front end. The user selects a location, a radius, and a maximum date from a set of choices. I have a basic version of this query implemented, but it's inefficient and slow. One way I know I can improve it is by condensing the many individual queries I'm using to assemble the objects into bulk queries. I just learned that was possible. But I'm also thinking about a more extensive redesign that utilizes memcache. The main problem is that I can't query the datastore by location because GAE won't allow multiple numerical comparison statements (<,<=,=,) in one query. I'm already using one for date, and I'd need TWO to check both latitude and longitude, so it's a no go. Currently, my algorithm looks like this: 1.) Query by date and select 2.) Use destination function from geopy's distance module to find the max and min latitude and longitudes for supplied distance 3.) Loop through results and remove all with lat/lng outside max/min 4.) Loop through again and use distance function to check exact distance, because step 2 will include some areas outside the radius. Remove results outside supplied distance (is this 2/3/4 combination inefficent?) 5.) Assemble many-to-many lists and attach to objects (this is where I need to switch to bulk operations) 6.) Return to client Here's my plan for using memcache.. let me know if I'm way out in left field on this as I have no prior experience with memcache or server caching in general. -Keep a list in the cache filled with "geo objects" that represent all my data. These have five properties: latitude, longitude, event_id, event_type (in anticipation of expanding beyond tournaments), and start_date. This list will be sorted by date. -Also keep a dict of pointers in the cache which represent the start and end indices in the cache for all the date ranges my app uses (next week, 2 weeks, month, 3 months, 6 months, year, 2 years). -Have a scheduled task that updates the pointers daily at 12am. -Add new inserts to the cache as well as the datastore; update pointers. Using this design, the algorithm would now look like: 1.) Use pointers to slice off appropriate chunk of list based on supplied date. 2-4.) Same as above algorithm, except with geo objects 5.) Use bulk operation to select full tournaments using remaining geo objects' event_ids 6.) Assemble many-to-manys 7.) Return to client Thoughts on this approach? Many thanks for reading and any advice you can give. -Dane

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• deploy a sinatra app with passenger gives only 404, page not founds. Yet a simple rack app works.

  - by berkes

  I have correctly (or prbably not) installed passenger on apache 2. Rack works, but sinatra keeps giving 404's. Here is what works: config.ru: #app = proc do |env| return [200, { "Content-Type" => "text/html" }, "hello <b>world</b>"] end run app Here is what works too: Running the app.rb (see below) with ruby app.rb and then looking at localhost:4567/about and / restarting the app, gives me a correct hello world. w00t. But then there is the sinatra entering the building: config.ru require 'rubygems' require 'sinatra' root_dir = File.dirname(__FILE__) set :environment, ENV['RACK_ENV'].to_sym set :root, root_dir set :app_file, File.join(root_dir, 'app.rb') disable :run run Sinatra::Application and an app.rb require 'rubygems' require 'sinatra' get '/' do "Hallo wereld!" end get '/about' do "Hello world, it's #{Time.now} at the server!" end This keeps giving 404s. /var/logs/apache2/error.log lists these correctly as "404" with something that worries me: 83.XXXXXXXXX - - [30/May/2010 16:06:52] "GET /about " 404 18 0.0007 83.XXXXXXXXX - - [30/May/2010 16:06:56] "GET / " 404 18 0.0007 The thing that worried me, is the space after the / and the /about. Would apache or sinatra go looking for /[space], like /%20? If anyone knows what this problem relates to, maybe a known bug (that I could not find) or a known gotcha? Maybe I am just being stupid and getting "it all wrong?" Otherwise any hints on where to get, read or log more developers data on a running rack, sinatra or passenger app would be helpfull too: to see what sinatra is looking for, for example. Some other information: Running ubuntu 9.04, apache2-mm-prefork (deb), mod_php5, ruby 1.8.7, passenger 2.2.11, sinatra 1.0

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• Maven building for GoogleAppEngine, forced to include JDO libraries?

  - by James.Elsey

  Hi, I'm trying to build my application for GoogleAppEngine using maven. I've added the following to my pom which should "enhance" my classes after building, as suggested on the DataNucleus documentation <plugin> <groupId>org.datanucleus</groupId> <artifactId>maven-datanucleus-plugin</artifactId> <version>1.1.4</version> <configuration> <log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration> <verbose>true</verbose> </configuration> <executions> <execution> <phase>process-classes</phase> <goals> <goal>enhance</goal> </goals> </execution> </executions> </plugin> According to the documentation on GoogleAppEngine, you have the choice to use JDO or JPA, I've chosen to use JPA since I have used it in the past. When I try to build my project (before I upload to GAE) using mvn clean package I get the following output [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Failed to resolve artifact. Missing: ---------- 1) javax.jdo:jdo2-api:jar:2.3-ec Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=javax.jdo -DartifactId=jdo2-api -Dversion=2.3-ec -Dpackaging=jar -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=javax.jdo -DartifactId=jdo2-api -Dversion=2.3-ec -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id] Path to dependency: 1) org.datanucleus:maven-datanucleus-plugin:maven-plugin:1.1.4 2) javax.jdo:jdo2-api:jar:2.3-ec ---------- 1 required artifact is missing. for artifact: org.datanucleus:maven-datanucleus-plugin:maven-plugin:1.1.4 from the specified remote repositories: __jpp_repo__ (file:///usr/share/maven2/repository), DN_M2_Repo (http://www.datanucleus.org/downloads/maven2/), central (http://repo1.maven.org/maven2) [INFO] ------------------------------------------------------------------------ [INFO] For more information, run Maven with the -e switch [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3 seconds [INFO] Finished at: Sat Apr 03 16:02:39 BST 2010 [INFO] Final Memory: 31M/258M [INFO] ------------------------------------------------------------------------ Any ideas why I should get such an error? I've searched through my entire source code and I'm not referencing JDO anywhere, so unless the app engine libraries require it, I'm not sure why I get this message.

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• I am having a problem of class cast exception. Can anyone please help me out?

  - by Piyush

  This is my code: package com.example.userpage; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class UserPage extends Activity { String tv,tv1; EditText name,pass; TextView x,y; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button button = (Button) findViewById(R.id.widget44); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { name.setText(" "); pass.setText(" "); } }); x = (TextView) findViewById(R.id.widget46); y = (TextView) findViewById(R.id.widget47); name = (EditText)findViewById(R.id.widget41); pass = (EditText)findViewById(R.id.widget42); Button button1 = (Button) findViewById(R.id.widget45); button1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { tv= name.getText().toString(); tv1 = pass.getText().toString(); x.setText(tv); y.setText(tv1); } }); } } And this is my log cat: 02-16 12:24:30.488: DEBUG/AndroidRuntime(973): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:24:30.488: DEBUG/AndroidRuntime(973): CheckJNI is ON 02-16 12:24:31.208: DEBUG/AndroidRuntime(973): --- registering native functions --- 02-16 12:24:33.498: DEBUG/AndroidRuntime(973): Shutting down VM 02-16 12:24:33.537: DEBUG/dalvikvm(973): Debugger has detached; object registry had 1 entries 02-16 12:24:33.537: INFO/AndroidRuntime(973): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:24:34.917: DEBUG/AndroidRuntime(981): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:24:34.927: DEBUG/AndroidRuntime(981): CheckJNI is ON 02-16 12:24:35.617: DEBUG/AndroidRuntime(981): --- registering native functions --- 02-16 12:24:38.029: INFO/ActivityManager(67): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.userpage/.UserPage } 02-16 12:24:38.129: DEBUG/AndroidRuntime(981): Shutting down VM 02-16 12:24:38.160: DEBUG/dalvikvm(981): Debugger has detached; object registry had 1 entries 02-16 12:24:38.168: INFO/AndroidRuntime(981): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:25:12.028: DEBUG/AndroidRuntime(990): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:25:12.038: DEBUG/AndroidRuntime(990): CheckJNI is ON 02-16 12:25:12.708: DEBUG/AndroidRuntime(990): --- registering native functions --- 02-16 12:25:15.178: DEBUG/dalvikvm(176): GC_EXPLICIT freed 114 objects / 5880 bytes in 115ms 02-16 12:25:15.318: DEBUG/PackageParser(67): Scanning package: /data/app/vmdl25170.tmp 02-16 12:25:15.588: INFO/PackageManager(67): Removing non-system package:com.example.userpage 02-16 12:25:15.597: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:25:15.648: INFO/Process(67): Sending signal. PID: 916 SIG: 9 02-16 12:25:15.877: INFO/UsageStats(67): Unexpected resume of com.android.launcher while already resumed in com.example.userpage 02-16 12:25:17.028: WARN/InputManagerService(67): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@4400ecf8 02-16 12:25:17.928: DEBUG/PackageManager(67): Scanning package com.example.userpage 02-16 12:25:17.949: INFO/PackageManager(67): Package com.example.userpage codePath changed from /data/app/com.example.userpage-1.apk to /data/app/com.example.userpage-2.apk; Retaining data and using new 02-16 12:25:17.987: INFO/PackageManager(67): /data/app/com.example.userpage-2.apk changed; unpacking 02-16 12:25:18.037: DEBUG/installd(35): DexInv: --- BEGIN '/data/app/com.example.userpage-2.apk' --- 02-16 12:25:18.737: DEBUG/dalvikvm(997): DexOpt: load 81ms, verify 112ms, opt 6ms 02-16 12:25:18.768: DEBUG/installd(35): DexInv: --- END '/data/app/com.example.userpage-2.apk' (success) --- 02-16 12:25:18.799: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:25:18.808: WARN/PackageManager(67): Code path for pkg : com.example.userpage changing from /data/app/com.example.userpage-1.apk to /data/app/com.example.userpage-2.apk 02-16 12:25:18.839: WARN/PackageManager(67): Resource path for pkg : com.example.userpage changing from /data/app/com.example.userpage-1.apk to /data/app/com.example.userpage-2.apk 02-16 12:25:18.868: DEBUG/PackageManager(67): Activities: com.example.userpage.UserPage 02-16 12:25:19.297: INFO/installd(35): move /data/dalvik-cache/data@[email protected]@classes.dex -> /data/dalvik-cache/data@[email protected]@classes.dex 02-16 12:25:19.297: DEBUG/PackageManager(67): New package installed in /data/app/com.example.userpage-2.apk 02-16 12:25:19.598: DEBUG/dalvikvm(67): GC_FOR_MALLOC freed 7979 objects / 516856 bytes in 246ms 02-16 12:25:20.498: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:25:20.708: DEBUG/dalvikvm(129): GC_EXPLICIT freed 124 objects / 5672 bytes in 157ms 02-16 12:25:21.838: DEBUG/dalvikvm(67): GC_EXPLICIT freed 4208 objects / 236264 bytes in 419ms 02-16 12:25:21.918: WARN/RecognitionManagerService(67): no available voice recognition services found 02-16 12:25:22.127: INFO/installd(35): unlink /data/dalvik-cache/data@[email protected]@classes.dex 02-16 12:25:22.478: DEBUG/AndroidRuntime(990): Shutting down VM 02-16 12:25:22.488: DEBUG/dalvikvm(990): Debugger has detached; object registry had 1 entries 02-16 12:25:22.588: INFO/AndroidRuntime(990): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:25:24.137: DEBUG/AndroidRuntime(1003): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:25:24.147: DEBUG/AndroidRuntime(1003): CheckJNI is ON 02-16 12:25:24.817: DEBUG/AndroidRuntime(1003): --- registering native functions --- 02-16 12:25:27.450: INFO/ActivityManager(67): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.userpage/.UserPage } 02-16 12:25:27.628: DEBUG/AndroidRuntime(1003): Shutting down VM 02-16 12:25:27.780: INFO/AndroidRuntime(1003): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:25:28.018: DEBUG/dalvikvm(1003): Debugger has detached; object registry had 1 entries 02-16 12:25:28.148: INFO/ActivityManager(67): Start proc com.example.userpage for activity com.example.userpage/.UserPage: pid=1010 uid=10036 gids={} 02-16 12:25:30.308: DEBUG/AndroidRuntime(1010): Shutting down VM 02-16 12:25:30.308: WARN/dalvikvm(1010): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): FATAL EXCEPTION: main 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.userpage/com.example.userpage.UserPage}: java.lang.ClassCastException: android.widget.TextView 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.os.Handler.dispatchMessage(Handler.java:99) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.os.Looper.loop(Looper.java:123) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread.main(ActivityThread.java:4627) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at java.lang.reflect.Method.invokeNative(Native Method) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at java.lang.reflect.Method.invoke(Method.java:521) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at dalvik.system.NativeStart.main(Native Method) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): Caused by: java.lang.ClassCastException: android.widget.TextView 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at com.example.userpage.UserPage.onCreate(UserPage.java:35) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 02-16 12:25:30.388: ERROR/AndroidRuntime(1010): ... 11 more 02-16 12:25:30.438: WARN/ActivityManager(67): Force finishing activity com.example.userpage/.UserPage 02-16 12:25:31.088: WARN/ActivityManager(67): Activity pause timeout for HistoryRecord{43f164f8 com.example.userpage/.UserPage} 02-16 12:25:32.588: DEBUG/dalvikvm(292): GC_EXPLICIT freed 46 objects / 2240 bytes in 6282ms 02-16 12:25:35.267: INFO/Process(1010): Sending signal. PID: 1010 SIG: 9 02-16 12:25:35.468: WARN/InputManagerService(67): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@43e60a90 02-16 12:25:35.900: INFO/ActivityManager(67): Process com.example.userpage (pid 1010) has died. 02-16 12:25:38.278: DEBUG/dalvikvm(176): GC_EXPLICIT freed 172 objects / 12280 bytes in 127ms 02-16 12:25:43.011: WARN/ActivityManager(67): Activity destroy timeout for HistoryRecord{43f164f8 com.example.userpage/.UserPage} 02-16 12:28:12.698: DEBUG/AndroidRuntime(1019): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:28:12.711: DEBUG/AndroidRuntime(1019): CheckJNI is ON 02-16 12:28:13.367: DEBUG/AndroidRuntime(1019): --- registering native functions --- 02-16 12:28:15.998: DEBUG/dalvikvm(176): GC_EXPLICIT freed 114 objects / 5888 bytes in 183ms 02-16 12:28:16.539: DEBUG/PackageParser(67): Scanning package: /data/app/vmdl25171.tmp 02-16 12:28:16.867: INFO/PackageManager(67): Removing non-system package:com.example.userpage 02-16 12:28:16.867: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:28:17.277: DEBUG/PackageManager(67): Scanning package com.example.userpage 02-16 12:28:17.308: INFO/PackageManager(67): Package com.example.userpage codePath changed from /data/app/com.example.userpage-2.apk to /data/app/com.example.userpage-1.apk; Retaining data and using new 02-16 12:28:17.328: INFO/PackageManager(67): /data/app/com.example.userpage-1.apk changed; unpacking 02-16 12:28:17.367: DEBUG/installd(35): DexInv: --- BEGIN '/data/app/com.example.userpage-1.apk' --- 02-16 12:28:18.357: DEBUG/dalvikvm(1026): DexOpt: load 85ms, verify 114ms, opt 6ms 02-16 12:28:18.398: DEBUG/installd(35): DexInv: --- END '/data/app/com.example.userpage-1.apk' (success) --- 02-16 12:28:18.428: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:28:18.438: WARN/PackageManager(67): Code path for pkg : com.example.userpage changing from /data/app/com.example.userpage-2.apk to /data/app/com.example.userpage-1.apk 02-16 12:28:18.477: WARN/PackageManager(67): Resource path for pkg : com.example.userpage changing from /data/app/com.example.userpage-2.apk to /data/app/com.example.userpage-1.apk 02-16 12:28:18.477: DEBUG/PackageManager(67): Activities: com.example.userpage.UserPage 02-16 12:28:18.977: INFO/installd(35): move /data/dalvik-cache/data@[email protected]@classes.dex -> /data/dalvik-cache/data@[email protected]@classes.dex 02-16 12:28:18.988: DEBUG/PackageManager(67): New package installed in /data/app/com.example.userpage-1.apk 02-16 12:28:19.528: DEBUG/dalvikvm(67): GC_FOR_MALLOC freed 6733 objects / 459728 bytes in 211ms 02-16 12:28:20.138: INFO/ActivityManager(67): Force stopping package com.example.userpage uid=10036 02-16 12:28:20.368: DEBUG/dalvikvm(129): GC_EXPLICIT freed 892 objects / 48744 bytes in 175ms 02-16 12:28:21.317: WARN/RecognitionManagerService(67): no available voice recognition services found 02-16 12:28:22.827: DEBUG/dalvikvm(67): GC_EXPLICIT freed 3877 objects / 241128 bytes in 452ms 02-16 12:28:22.979: INFO/installd(35): unlink /data/dalvik-cache/data@[email protected]@classes.dex 02-16 12:28:23.277: DEBUG/AndroidRuntime(1019): Shutting down VM 02-16 12:28:23.307: DEBUG/dalvikvm(1019): Debugger has detached; object registry had 1 entries 02-16 12:28:23.328: INFO/AndroidRuntime(1019): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:28:24.989: DEBUG/AndroidRuntime(1032): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<< 02-16 12:28:24.989: DEBUG/AndroidRuntime(1032): CheckJNI is ON 02-16 12:28:25.888: DEBUG/AndroidRuntime(1032): --- registering native functions --- 02-16 12:28:28.588: INFO/ActivityManager(67): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.example.userpage/.UserPage } 02-16 12:28:28.888: DEBUG/AndroidRuntime(1032): Shutting down VM 02-16 12:28:28.997: DEBUG/dalvikvm(1032): Debugger has detached; object registry had 1 entries 02-16 12:28:29.038: INFO/AndroidRuntime(1032): NOTE: attach of thread 'Binder Thread #3' failed 02-16 12:28:30.417: INFO/ActivityManager(67): Start proc com.example.userpage for activity com.example.userpage/.UserPage: pid=1039 uid=10036 gids={} 02-16 12:28:32.588: DEBUG/AndroidRuntime(1039): Shutting down VM 02-16 12:28:32.598: WARN/dalvikvm(1039): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): FATAL EXCEPTION: main 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.userpage/com.example.userpage.UserPage}: java.lang.ClassCastException: android.widget.TextView 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.os.Handler.dispatchMessage(Handler.java:99) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.os.Looper.loop(Looper.java:123) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread.main(ActivityThread.java:4627) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at java.lang.reflect.Method.invokeNative(Native Method) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at java.lang.reflect.Method.invoke(Method.java:521) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at dalvik.system.NativeStart.main(Native Method) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): Caused by: java.lang.ClassCastException: android.widget.TextView 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at com.example.userpage.UserPage.onCreate(UserPage.java:34) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 02-16 12:28:32.648: ERROR/AndroidRuntime(1039): ... 11 more 02-16 12:28:32.698: WARN/ActivityManager(67): Force finishing activity com.example.userpage/.UserPage 02-16 12:28:32.967: DEBUG/dalvikvm(292): GC_EXPLICIT freed 46 objects / 2240 bytes in 6840ms 02-16 12:28:33.247: WARN/ActivityManager(67): Activity pause timeout for HistoryRecord{43ee7b70 com.example.userpage/.UserPage} 02-16 12:28:36.947: INFO/Process(1039): Sending signal. PID: 1039 SIG: 9 02-16 12:28:37.017: INFO/ActivityManager(67): Process com.example.userpage (pid 1039) has died. 02-16 12:28:37.128: WARN/InputManagerService(67): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@43e872f8 02-16 12:28:42.087: DEBUG/dalvikvm(176): GC_EXPLICIT freed 156 objects / 11488 bytes in 145ms 02-16 12:28:45.391: WARN/ActivityManager(67): Activity destroy timeout for HistoryRecord{43ee7b70 com.example.userpage/.UserPage} 02-16 12:28:47.177: DEBUG/SntpClient(67): request time failed: java.net.SocketException: Address family not supported by protocol

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• Optimizing tasks to reduce CPU in a trading application

  - by Joel

  Hello, I have designed a trading application that handles customers stocks investment portfolio. I am using two datastore kinds: Stocks - Contains unique stock name and its daily percent change. UserTransactions - Contains information regarding a specific purchase of a stock made by a user : the value of the purchase along with a reference to Stock for the current purchase. db.Model python modules: class Stocks (db.Model): stockname = db.StringProperty(multiline=True) dailyPercentChange=db.FloatProperty(default=1.0) class UserTransactions (db.Model): buyer = db.UserProperty() value=db.FloatProperty() stockref = db.ReferenceProperty(Stocks) Once an hour I need to update the database: update the daily percent change in Stocks and then update the value of all entities in UserTransactions that refer to that stock. The following python module iterates over all the stocks, update the dailyPercentChange property, and invoke a task to go over all UserTransactions entities which refer to the stock and update their value: Stocks.py # Iterate over all stocks in datastore for stock in Stocks.all(): # update daily percent change in datastore db.run_in_transaction(updateStockTxn, stock.key()) # create a task to update all user transactions entities referring to this stock taskqueue.add(url='/task', params={'stock_key': str(stock.key(), 'value' : self.request.get ('some_val_for_stock') }) def updateStockTxn(stock_key): #fetch the stock again - necessary to avoid concurrency updates stock = db.get(stock_key) stock.dailyPercentChange= data.get('some_val_for_stock') # I get this value from outside ... some more calculations here ... stock.put() Task.py (/task) # Amount of transaction per task amountPerCall=10 stock=db.get(self.request.get("stock_key")) # Get all user transactions which point to current stock user_transaction_query=stock.usertransactions_set cursor=self.request.get("cursor") if cursor: user_transaction_query.with_cursor(cursor) # Spawn another task if more than 10 transactions are in datastore transactions = user_transaction_query.fetch(amountPerCall) if len(transactions)==amountPerCall: taskqueue.add(url='/task', params={'stock_key': str(stock.key(), 'value' : self.request.get ('some_val_for_stock'), 'cursor': user_transaction_query.cursor() }) # Iterate over all transaction pointing to stock and update their value for transaction in transactions: db.run_in_transaction(updateUserTransactionTxn, transaction.key()) def updateUserTransactionTxn(transaction_key): #fetch the transaction again - necessary to avoid concurrency updates transaction = db.get(transaction_key) transaction.value= transaction.value* self.request.get ('some_val_for_stock') db.put(transaction) The problem: Currently the system works great, but the problem is that it is not scaling well… I have around 100 Stocks with 300 User Transactions, and I run the update every hour. In the dashboard, I see that the task.py takes around 65% of the CPU (Stock.py takes around 20%-30%) and I am using almost all of the 6.5 free CPU hours given to me by app engine. I have no problem to enable billing and pay for additional CPU, but the problem is the scaling of the system… Using 6.5 CPU hours for 100 stocks is very poor. I was wondering, given the requirements of the system as mentioned above, if there is a better and more efficient implementation (or just a small change that can help with the current implemntation) than the one presented here. Thanks!! Joel

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• Configuration Element Collection Section

  - by Matt

  I would like to set up a custom app configuration element collection section like this <logSectionGroup> <logSection name="Testttt"> <properties name ="Pride"> <pathName="TestingLog.txt"/> <deleteRetention="100"/> <deleteZeroRetention="5"/> <wildcard="*.txt"/> </properties> <properties name ="Adhoc"> <pathName="blah.txt"/> <deleteRetention="70"/> <deleteZeroRetention="3"/> <wildcard="*.*"/> </properties> </logSection> </logSectionGroup> Is this possible? Properties would be the configuration element, and log section would be the configuration element collection. The problem is, I've only seen where you can have multiple instances of a single element instead of multiple elements. <Section name="Section1"> <Section name="Section1"> <SubSection name="SubSection1"> <Item name="Item1" /> <Item name="Item2" /> </SubSection> <SubSection name="SubSection2"> <Item name="Item1" /> <Item name="Item2" /> </SubSection> </Section> When you use GetElementKey() you have it return element "name" in the above example but how would you return 4 different elements like "pathName" "deleteRetention" etc. Here is my Definition for PropElement Public Class PropElement Inherits ConfigurationElement <ConfigurationProperty("pathName", IsRequired:=True)> _ Public Property PathName() As String Get Return CStr(Me("pathName")) End Get Set(ByVal value As String) Me("pathName") = value End Set End Property <ConfigurationProperty("deleteRetention", DefaultValue:="0", IsRequired:=False)> _ Public Property DeleteRetention() As Integer Get Return CStr(Me("deleteRetention")) End Get Set(ByVal value As Integer) Me("deleteRetention") = value End Set End Property <ConfigurationProperty("deleteZeroRetention", DefaultValue:="0", IsRequired:=False)> _ Public Property DeleteZeroRetention() As Integer Get Return CStr(Me("deleteZeroRetention")) End Get Set(ByVal value As Integer) Me("deleteZeroRetention") = value End Set End Property <ConfigurationProperty("wildcard", DefaultValue:="*.*", IsRequired:=False)> _ Public Property Wildcard() As String Get Return CStr(Me("wildcard")) End Get Set(ByVal value As String) Me("wildcard") = value End Set End Property End Class

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• overwrite existing entity via bulkloader.Loader

  - by Ray Yun

  I was going to CSV based export/import for large data with app engine. My idea was just simple. First column of CSV would be key of entity. If it's not empty, that row means existing entity and should overwrite old one. Else, that row is new entity and should create new one. I could export key of entity by adding key property. class FrontExporter(bulkloader.Exporter): def __init__(self): bulkloader.Exporter.__init__(self, 'Front', [ ('__key__', str, None), ('name', str, None), ]) But when I was trying to upload CSV, it had failed because bulkloader.Loader.generate_key() was just for "key_name" not "key" itself. That means all exported entities in CSV should have unique 'key_name' if I want to modify-and-reupload them. class FrontLoader(bulkloader.Loader): def __init__(self): bulkloader.Loader.__init__(self, 'Front', [ ('_UNUSED', lambda x: None), ('name', lambda x: x.decode('utf-8')), ]) def generate_key(self,i,values): # first column is key keystr = values[0] if len(keystr)==0: return None return keystr I also tried to load key directly without using generate_key(), but both failed. class FrontLoader(bulkloader.Loader): def __init__(self): bulkloader.Loader.__init__(self, 'Front', [ ('Key', db.Key), # not working. just create new one. ('__key__', db.Key), # same... So, how can I overwrite existing entity which has no 'key_name'? It would be horrible if I should give unique name to all entities..... From the first answer, I could handle this problem. :) def create_entity(self, values, key_name=None, parent=None): # if key_name is None: # print 'key_name is None' # else: # print 'key_name=<',key_name,'> : length=',len(key_name) Validate(values, (list, tuple)) assert len(values) == len(self._Loader__properties), ( 'Expected %d columns, found %d.' % (len(self._Loader__properties), len(values))) model_class = GetImplementationClass(self.kind) properties = { 'key_name': key_name, 'parent': parent, } for (name, converter), val in zip(self._Loader__properties, values): if converter is bool and val.lower() in ('0', 'false', 'no'): val = False properties[name] = converter(val) if key_name is None: entity = model_class(**properties) #print 'create new one' else: entity = model_class.get(key_name) for key, value in properties.items(): setattr(entity, key, value) #print 'overwrite old one' entities = self.handle_entity(entity) if entities: if not isinstance(entities, (list, tuple)): entities = [entities] for entity in entities: if not isinstance(entity, db.Model): raise TypeError('Expected a db.Model, received %s (a %s).' % (entity, entity.__class__)) return entities def generate_key(self,i,values): # first column is key if values[0] is None or values[0] in ('',' ','-','.'): return None return values[0]

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• Cross-site request forgery protections: Where do I put all these lines?

  - by brilliant

  Hello, I was looking for a python code that would be able to log in from "Google App Engine" to some of my accounts on some websites (like yahoo or eBay) and was given this code: import urllib, urllib2, cookielib url = "https://login.yahoo.com/config/login?" form_data = {'login' : 'my-login-here', 'passwd' : 'my-password-here'} jar = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(jar)) form_data = urllib.urlencode(form_data) # data returned from this pages contains redirection resp = opener.open(url, form_data) # yahoo redirects to http://my.yahoo.com, so lets go there instead resp = opener.open('http://mail.yahoo.com') print resp.read() Unfortunately, this code didn't work, so I asked another question here and one supporter among other things said this: "You send MD5 hash and not plain password. Also you'd have to play along with all kinds of CSRF protections etc. that they're implementing. Look: <input type="hidden" name=".tries" value="1"> <input type="hidden" name=".src" value="ym"> <input type="hidden" name=".md5" value=""> <input type="hidden" name=".hash" value=""> <input type="hidden" name=".js" value=""> <input type="hidden" name=".last" value=""> <input type="hidden" name="promo" value=""> <input type="hidden" name=".intl" value="us"> <input type="hidden" name=".bypass" value=""> <input type="hidden" name=".partner" value=""> <input type="hidden" name=".u" value="bd5tdpd5rf2pg"> <input type="hidden" name=".v" value="0"> <input type="hidden" name=".challenge" value="5qUiIPGVFzRZ2BHhvtdGXoehfiOj"> <input type="hidden" name=".yplus" value=""> <input type="hidden" name=".emailCode" value=""> <input type="hidden" name="pkg" value=""> <input type="hidden" name="stepid" value=""> <input type="hidden" name=".ev" value=""> <input type="hidden" name="hasMsgr" value="0"> <input type="hidden" name=".chkP" value="Y"> <input type="hidden" name=".done" value="http://mail.yahoo.com"> <input type="hidden" name=".pd" value="ym_ver=0&c=&ivt=&sg="> I am not quite sure where he got all these lines from and where in my code I am supposed to add them. Do You have any idea? I know I was supposed to ask him this question first, and I did, but he never returned, so I decided to ask a separate question here.

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• Sessions not persisting between requests

  - by klonq

  My session objects are only stored within the request scope on google app engine and I can't figure out how to persist objects between requests. The docs are next to useless on this matter and I can't find anyone who's experienced a similar problem. Please help. When I store session objects in the servlet and forward the request to a JSP using: getServletContext().getRequestDispatcher("/example.jsp").forward(request,response); Everything works like it should. But when I store objects to the session and redirect the request using: response.sendRedirect("/example/url"); The session objects are lost to the ether. In fact when I dump session key/value pairs on new requests there is absolutely nothing, session objects only appear within the request scope of servlets which create session objects. It appears to me that the objects are not being written to Memcache or Datastore. In terms of configuring sessions for my application I have set <sessions-enabled>true</sessions-enabled> In appengine-web.xml. Is there anything else I am missing? The single paragraph of documentation on sessions also notes that only objects which implement Serializable can be stored in the session between requests. I have included an example of the code which is not working below. The obvious solution is to not use redirects, and this might be ok for the example given below but some application data does need to be stored in the session between requests so I need to find a solution to this problem. EXAMPLE: The class FlashMessage gives feedback to the user from server-side operations. if (email.send()) { FlashMessage flash = new FlashMessage(FlashMessage.SUCCESS, "Your message has been sent."); session.setAttribute(FlashMessage.SESSION_KEY, flash); // The flash message will not be available in the session object in the next request response.sendRedirect(URL.HOME); } else { FlashMessage flash = new FlashMessage(FlashMessage.ERROR, FlashMessage.INVALID_FORM_DATA); session.setAttribute(FlashMessage.SESSION_KEY, flash); // The flash message is displayed without problem getServletContext().getRequestDispatcher(Templates.CONTACT_FORM).forward(request,response); } FlashMessage.java import java.io.Serializable; public class FlashMessage implements Serializable { private static final long serialVersionUID = 8109520737272565760L; // I have tried using different, default and no serialVersionUID public static final String SESSION_KEY = "flashMessage"; public static final String ERROR = "error"; public static final String SUCCESS = "success"; public static final String INVALID_FORM_DATA = "Your request failed to validate."; private String message; private String type; public FlashMessage (String type, String message) { this.type = type; this.message = message; } public String display(){ return "<div id='flash' class='" + type + "'>" + message + "</div>"; } }

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• On android how would I go about creating a prompt for an app that requires a user to enter a username before fully launching the app?

  - by racl101

  I'll preface this with I'm really new to working on Android. So I have to work on an existing app and create a screen that prompts the user for a username if one isn't entered then it won't launch the currently existing main activity (i.e. it won't fully launch the app. Instead it will just sit on that screen until a username is entered.) I suppose that it's tantamount to a web app login page in that it will not let a user past that page if the user is not authenticated and authorized. However, there's no authentication nor authorization in this app. Instead, on first run a user must simply register with a username and that username gets saved to the database and for any subsequent runs the app's main activity will just start because a user has registered to that phone. In fact, the app will not prompt the user for their name again unless the app gets deleted with all its data and reinstalled again. This implicitly means that I have to save the user's name in the database or some other kind of storage. So I was wondering what would be the best way of doing this in an app with an existing main activity? Should I try to accomplish this on that existing main activity or create a new activity to display this prompt screen and, in effect, block the main activity from running until the user enters their name? Any tutorials or links would be helpful and thank you in advance for any help.

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• How do I improve my Facebook app's visibility in the Application Directory?

  - by Chris Barnhill

  I have a Facebook app that is nearly impossible to locate in the Facebook App Directory. You have to search for the app name to find it. Browsing apps does not work. I would like to find a way to have my app appear near the top of the App Directory so when user's browse the apps they will quickly and easily find it. Is there a way to accomplish this?

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• Can't run ASP.NET MVC 2 web app on IIS 7.5

  - by Portman

  I'm trying to run an ASP.NET MVC 2 web application under IIS on Windows 7, but I get a 403.14 error. Here are the steps to reproduce: Open Visual Studio 2010 Create a new ASP.NET MVC 2 project called MvcApplication1 Shift+F5 to run the app. You should see http://localhost:{random_port}/ and the page will render correctly. Click on MvcApplication1, and select "Properties". Go to the "Web" section. Select "Use Local IIS Web server" and create a virtual directory. Save. Shift+F5 to run the app. You should see http://localhost/MvcApplication1/ and an IIS error HTTP Error 403.14 - Forbidden The Web server is configured to not list the contents of this directory.. It's clear that for whatever reason, ASP.NET routing is not working correctly. Things I've already thought of and tried: Verified that all IIS features are enabled in "Turn Windows features on or off". Verified that the default website is configured to use .NET 4.0 Reassigned ASP.NET v4 scripmaps via aspnet_regiis -i in the v4.0.30319 directory. Here's the most amazing part - this is on a just-built machine. New copy of Windows 7 x64 Ultimate, clean install of Visual Studio 2010 Premium, no other websites and no other work performed. Anything else I can try?

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• PDF rendering crashes app Core Graphics

  - by Felixyz

  EDIT: The memory leaks turned out to be unrelated to the crashes. Leaks are fixed but crashes remain, still mysterious. My (iPhone) app does lots of PDF loading and rendering, some of it threaded. Sometime, it seems always after I flush a page cash after getting a memory warning, the app crashes with a bad access when trying to draw a pdf page stored in an NSData object. Here is one example trace: #0 0x3016d564 in CGPDFResourcesGetResource () #1 0x3016d58a in CGPDFResourcesGetResource () #2 0x3016d94e in CGPDFResourcesGetExtGState () #3 0x3015fac4 in CGPDFContentStreamGetExtGState () #4 0x301629a8 in op_gs () #5 0x3016df12 in handle_xname () #6 0x3016dd9e in read_objects () #7 0x3016de6c in CGPDFScannerScan () #8 0x30161e34 in CGPDFDrawingContextDraw () #9 0x3016a9dc in CGContextDrawPDFPage () But sometimes I get this instead: Program received signal: “EXC_BAD_ACCESS”. (gdb) bt #0 0x335625fa in objc_msgSend () #1 0x32c04eba in CFDictionaryGetValue () #2 0x3016d500 in get_value () #3 0x3016d5d6 in CGPDFResourcesGetFont () #4 0x3015fbb4 in CGPDFContentStreamGetFont () #5 0x30163480 in op_Tf () #6 0x3016df12 in handle_xname () #7 0x3016dd9e in read_objects () #8 0x3016de6c in CGPDFScannerScan () #9 0x30161e34 in CGPDFDrawingContextDraw () #10 0x3016a9dc in CGContextDrawPDFPage () Is this an indication that I've mistakenly deallocated an object? It's hard for me to decode what's happening here. This is how I create and retain the various objects involved: // Some data was just loaded from the network and is pointed to by "data" self.pdfData = data; _dataProviderRef = CGDataProviderCreateWithData( NULL, [_pdfData bytes], [_pdfData length], NULL ); _documentRef = CGPDFDocumentCreateWithProvider(_dataProviderRef); _pageRef = CGPDFDocumentGetPage(_documentRef, 1); CGPDFPageRetain(_pageRef); _pdfFrame = CGPDFPageGetBoxRect(_pageRef, kCGPDFArtBox); So the NSData object is retained, and I explicitly retain the page reference. The data provider and the document are already retained by the create-functions. And here is my dealloc method: -(void)dealloc { if (_pageRef) CGPDFPageRelease(_pageRef); if (_documentRef) CGPDFDocumentRelease(_documentRef); if (_dataProviderRef) CGDataProviderRelease(_dataProviderRef); self.pdfData = nil; [super dealloc]; } Am I doing anything wrong? Even an assurance that I'm not, with explanation, would be a help.

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• xcode linker error on iPhone app (Only on simulator)

  - by RexOnRoids

  Im getting this linker error that won't let me compile. It only happens on the simulator. KEY POINTS: - Happens only in simulator - Similar to THIS question, but found no FRAMEWORK_SEARCH_PATHS in my .pbxproj file - Though my OS is 10.6.2, I had to build target 1.5 to avoid other linker errors - libxml2.dylib IS required and is in my Frameworks group - The other cited libraries I have never heard of. - Tried bringing in those other Libs under frameworks, didn't solve. Build SpaceTweet of project SpaceTweet with configuration Debug Ld build/Debug-iphonesimulator/SpaceTweet.app/SpaceTweet normal i386 cd "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)" setenv MACOSX_DEPLOYMENT_TARGET 10.5 setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk "-L/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator" -L/Users/Scott/Desktop "-L/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/../../libYAJLIPhone-0" -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk/usr/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/usr/lib "-F/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator" -filelist "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/SpaceTweet.build/Debug-iphonesimulator/SpaceTweet.build/Objects-normal/i386/SpaceTweet.LinkFileList" -mmacosx-version-min=10.5 -framework Foundation -framework UIKit -framework CoreGraphics -framework AVFoundation -framework MessageUI -lYAJLIPhone -lxml2 -o "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator/SpaceTweet.app/SpaceTweet" ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libxml2.dylib, missing required architecture i386 in file ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libSystem.dylib, missing required architecture i386 in file ld: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libobjc.A.dylib, missing required architecture i386 in file collect2: ld returned 1 exit status Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1 CLUE: Again, MY question is very similar to THIS SOLVED QUESTION except that in my case I did NOT find a FRAMEWORK_SEARCH_PATHS entry in the .pbxproj file in my project bundle and thus could not solve in the manner in which that question was solved.

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• "Content is not allowed in prolog" when parsing perfectly valid XML on GAE

  - by Adrian Petrescu

  Hey guys, I've been beating my head against this absolutely infuriating bug for the last 48 hours, so I thought I'd finally throw in the towel and try asking here before I throw my laptop out the window. I'm trying to parse the response XML from a call I made to AWS SimpleDB. The response is coming back on the wire just fine; for example, it may look like: <?xml version="1.0" encoding="utf-8"?> <ListDomainsResponse xmlns="http://sdb.amazonaws.com/doc/2009-04-15/"> <ListDomainsResult> <DomainName>Audio</DomainName> <DomainName>Course</DomainName> <DomainName>DocumentContents</DomainName> <DomainName>LectureSet</DomainName> <DomainName>MetaData</DomainName> <DomainName>Professors</DomainName> <DomainName>Tag</DomainName> </ListDomainsResult> <ResponseMetadata> <RequestId>42330b4a-e134-6aec-e62a-5869ac2b4575</RequestId> <BoxUsage>0.0000071759</BoxUsage> </ResponseMetadata> </ListDomainsResponse> I pass in this XML to a parser with XMLEventReader eventReader = xmlInputFactory.createXMLEventReader(response.getContent()); and call eventReader.nextEvent(); a bunch of times to get the data I want. Here's the bizarre part -- it works great inside the local server. The response comes in, I parse it, everyone's happy. The problem is that when I deploy the code to Google App Engine, the outgoing request still works, and the response XML seems 100% identical and correct to me, but the response fails to parse with the following exception: com.amazonaws.http.HttpClient handleResponse: Unable to unmarshall response (ParseError at [row,col]:[1,1] Message: Content is not allowed in prolog.): <?xml version="1.0" encoding="utf-8"?> <ListDomainsResponse xmlns="http://sdb.amazonaws.com/doc/2009-04-15/"><ListDomainsResult><DomainName>Audio</DomainName><DomainName>Course</DomainName><DomainName>DocumentContents</DomainName><DomainName>LectureSet</DomainName><DomainName>MetaData</DomainName><DomainName>Professors</DomainName><DomainName>Tag</DomainName></ListDomainsResult><ResponseMetadata><RequestId>42330b4a-e134-6aec-e62a-5869ac2b4575</RequestId><BoxUsage>0.0000071759</BoxUsage></ResponseMetadata></ListDomainsResponse> javax.xml.stream.XMLStreamException: ParseError at [row,col]:[1,1] Message: Content is not allowed in prolog. at com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(Unknown Source) at com.sun.xml.internal.stream.XMLEventReaderImpl.nextEvent(Unknown Source) at com.amazonaws.transform.StaxUnmarshallerContext.nextEvent(StaxUnmarshallerContext.java:153) ... (rest of lines omitted) I have double, triple, quadruple checked this XML for 'invisible characters' or non-UTF8 encoded characters, etc. I looked at it byte-by-byte in an array for byte-order-marks or something of that nature. Nothing; it passes every validation test I could throw at it. Even stranger, it happens if I use a Saxon-based parser as well -- but ONLY on GAE, it always works fine in my local environment. It makes it very hard to trace the code for problems when I can only run the debugger on an environment that works perfectly (I haven't found any good way to remotely debug on GAE). Nevertheless, using the primitive means I have, I've tried a million approaches including: XML with and without the prolog With and without newlines With and without the "encoding=" attribute in the prolog Both newline styles With and without the chunking information present in the HTTP stream And I've tried most of these in multiple combinations where it made sense they would interact -- nothing! I'm at my wit's end. Has anyone seen an issue like this before that can hopefully shed some light on it? Thanks!

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• iPhone app linker error on Snow Leopard (Only on simulator)

  - by RexOnRoids

  Im getting this linker error that won't let me compile. It only happens on the simulator. NOTE: - OSX 10.6.2 but had to use 10.5 as build target to avoid other linker errors - libxml2.dylib IS required and is in my Frameworks group - The other cited libraries I have never heard of. - Tried bringing in those other Libs under frameworks, didn't solve. Build SpaceTweet of project SpaceTweet with configuration Debug Ld build/Debug-iphonesimulator/SpaceTweet.app/SpaceTweet normal i386 cd "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)" setenv MACOSX_DEPLOYMENT_TARGET 10.5 setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk "-L/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator" -L/Users/Scott/Desktop "-L/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/../../libYAJLIPhone-0" -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk/usr/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/usr/lib "-F/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator" -filelist "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/SpaceTweet.build/Debug-iphonesimulator/SpaceTweet.build/Objects-normal/i386/SpaceTweet.LinkFileList" -mmacosx-version-min=10.5 -framework Foundation -framework UIKit -framework CoreGraphics -framework AVFoundation -framework MessageUI -lYAJLIPhone -lxml2 -o "/Users/Scott/Desktop/iPhone Dev/SpaceTweet(Experimental)/build/Debug-iphonesimulator/SpaceTweet.app/SpaceTweet" ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libxml2.dylib, missing required architecture i386 in file ld: warning: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libSystem.dylib, missing required architecture i386 in file ld: in /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/libobjc.A.dylib, missing required architecture i386 in file collect2: ld returned 1 exit status Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 failed with exit code 1

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