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• I don't see any stacktrace running webapp with JBoss

  - by anna

  hi everyone. I have some very annoying trouble with jboss. I'm developing simple web-app using richfaces and I'm facing the problem that when I deploy and run application in browser jboss shows just following message: This page contains the following errors: error on line 12 at column 16: internal error Below is a rendering of the page up to the first error. And that's all. No stacktrace! It's so uneasy to search for a source of problem. Could anyone help me to "turn on" stacktracing?

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• problems, custum wrap (class) around PDO, doesn't work

  - by Knarf

  DB::construct(); $STH = DB::prepare('INSERT INTO users (username, password, email, activationkey) VALUES (?, UNHEX(?), ?, ?)'); var_dump($STH); $result = $STH->execute(array('test', 'nils', '[email protected]', '227a038fe9c81515b514cb152188e95c')); echo "working? <br />"; if($result == false) echo 'noooo...'; It outputs and doesn't put anything in the database. Works with a similare code with DPO just without my DB class. But I doesn't get any errors. Anyone have an idea what the problem could be? object(PDOStatement)#2 (1) { ["queryString"]=> string(87) "INSERT INTO users (username, password, email, activationkey) VALUES (?, UNHEX(?), ?, ?)" } working? <br /> noooo...

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• ASP.NET MVC - how to modify requested URLs?

  - by Marek

  The baidu spider seems to be adding ¤ to end of some crawled urls (it seems that it happens with urls containing single unicode character as the last character) The baidu-requested url looks like this: site.com/abc/ä¤ while site.com/abc/ä is the valid url and as linked from many places on my site. The internal problem is that a different route is matched for this kind of url and an unhandled exception occurs. I would not like to lose baidu because of too many 500 errors on the site. I would like to change the requested URL to a different URL by removing the added character before any ASP.NET MVC processing of the request starts. Can I write a request filter/http module or something similar in ASP.NET MVC to remove the trailing '¤' from the urls? I would not like to alter my routes to counter-hack this behavior.

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• Is it kEatSpeed or kSpeedEat?

  - by bobobobo

  I have a bunch of related constants that are not identical. What's the better way to name them? way #1 kWalkSpeed kRunSpeed kEatSpeed kDrinkSpeed Or, way #2 kSpeedWalk kSpeedRun kSpeedEat kSpeedDrink If we evaluate these based on readability understandability not bug prone with subtle errors due to using wrong variable name I think way #1 wins readability, they tie for understandability, and way #2 wins for not bug prone. I'm not sure how often it happens to others, but when variable names like this get long, then its easy to write kSpeedEatingWhenInAHurry when you really meant kSpeedEatingWhenInHome, especially when using autocomplete. Any perspectives?

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• Algorithm for calculating indefinite integrals

  - by mbac32768

  Suppose I have an integral that's bounded on one (or both) ends by (-)infinity. AFAICT, I can't analytically solve this problem, it takes brute force (e.g. using a Left Riemann Sum). I'm having trouble generalizing the algorithm so that it sets the proper subdivisions; I'll either do far too much work to calculate something trivial, or not do nearly enough and have huge aliasing errors. Answering in any language is cool, but maybe someone with better google-fu can end this quickly. :) Is what I'm looking for as impossible as trying to measure the British coastline?

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• Reuse C++ Header files

  - by Amrish

  Guys, I have a Visual C++ solution with 2 projects AlgorithmA & AlgorithmB and both share a common header file RunAlgo.h with the class declaration. Each project in the solution has its own unique implementation for the header file. I am trying to compile a DLL out of the common header file RunAlgo.h and add reference to this DLL in the projects AlgorithmA & AlgorithmB. I have then included separate RunAlgo.cpp definition file in both my projects. The problem is that I am getting linker errors while compiling the new DLL project which has only the header file. So, the question is Can a header file with only class declaration be compiled into a DLL (Similar to class library containing an Interface in C#)? For the above scenario, is there a better approach to reuse the common Header file among projects? Should the above method work (re-check my code?)

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• Trick to getting initWithNibFile to be invoked?

  - by PhazeZero

  I've implemented a View Controller, and I'm trying to do some very basic initialization in initWithNibFile...which I understand to be the designated initializer for View Controller objects. I've tried to put breakpoints on the code, and have put very simple NSLog statements into it as well. Regardless...I'm not seeing it be executed (and the object i'm attempting to alloc/init inside the function is also not being allocated - so I'm about 99% sure I'm not hitting the code. Is there something I need to do elsewhere to cause this method to be invoked? I'm getting a clean build, no warnings or errors. And the app successfully loads up the View, and I can invoke a ButtonClick method I've coded and connected to this same View Controller. Any suggestions would be appreciated. TC

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• rails: has_many :through + polymorphism validation?

  - by ramonrails

  I am trying to achieve this. Any hints? A project has many users through join model A user has many projects through join model Admin class inherits User class. It also has some Admin specific stuff. Admin like inheritance for Supervisor and Operator Project has one Admin, One supervisor and many operators. Now I want to 1. submit data for project, admin, supervisor and operator in a single project form 2. validate all and show errors on the project form. Project has_many :users, :through = :projects_users User has_many :projects, :through = :projects_users ProjectsUser = :id integer, :user_id :integer, :project_id :integer, :user_type :string ProjectUser belongs_to :project, belongs_to :user, :polymorphic = true Admin < User Supervisor < User Operator < User Is the approach correct? Any and all suggestions are welcome.

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• Why does System.Threading.Timer callback successfully update UI?

  - by Geo P

  I have several System.Threading.Timers on my form application with callbacks that update the UI...successfully - i.e. without throwing errors. I had built these earlier, before I knew that UI should not be updated on any thread other than the UI thread. Now I am confused as to why it does not throw cross-thread exceptions when I am updating UI on these separate threading.timer threads? I will be changing these callbacks so that the UI updates are invoked on UI thread, but I am curious as to why this works. Edit: My application is a WinForms Application.

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• Casting to global variable from LPVOID - C

  - by Jamie Keeling

  I am trying to cast data to a struct from a parameter passed into my method, I need the data to be passed to a global variable as it is needed elsewhere in my application. I have tried the following but I get errors saying that diceResult is an undeclared identifier Here is the code itself: //Structure to hold dice data typedef struct diceData { int dice1; int dice2; }; struct diceResult; DWORD WINAPI UnpackDiceData(LPVOID sentData) { //Unpack data struct diceData unpackedData = *((struct diceData*)sentData); diceResult.dice1 = unpackedData.dice1; diceResult.dice2 = unpackedData.dice2; } I don't understand why it won't recognise it being there when it's clearly global.

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• Two view App with root template view

  - by Tieman

  Hi I was wanted to do Application witch have a root template view with a nice logo on top or something adn load other views just below (here is what I have right now: Test App ) But I have a little problem. If I'll remove a comment in file TestAppDelegate.m on line 58 //[currentView release]; Application will crash with bunch of errors when I try to switch views. But if I comment this line Project analyzer is telling me that I have a potential leak with currentView variable. Can somebody spare some time and see in that code what I did wrong?

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• iPhone, special characters in JSON Response

  - by eddit

  Writing an iphone app, and I'm getting my data from a REST API that returns JSON. My problem is, some of the data has special characters embedded and Im getting errors. Example: MartÌn Petite-RiviËre-Saint-FranÁois Here is my current code: NSString *jsonString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding]; NSMutableArray *tempResults = [[[jsonString JSONValue] objectForKey:@"getRegionResortsLastUpdatedResponse"] objectForKey:@"return"]; Whenever the data has special characters in it "jsonString" return "(null)", otherwise everything works fine. Is this something I can handle on my end, or does the API need to be modified to output the character codes?

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• Jsonp cross-domain ajax

  - by Guillaume le Floch

  I'm working on an application which use ajax call to get html from the server. When I run it on the server, everything works fine. But when I'm running on a localhost, I've a 'Access-Control-Allow-Origin' error. I looked arround and it seems like using jsonp could be the solution. So, my ajax call looks like that: $.ajax({ url: url, dataType: 'jsonp', crossDomain: true, type: 'GET', success: function(data){ // should put the data in a div }, error: function(){ //do some stuff with errors } }); I get html from the server, but I always have this error: Uncaught SyntaxError: Unexpected token < Is there a way to wrap the jsonp response in html? Thanks!

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• Django Inherited Field Access

  - by Rick

  As of the most current version, Django does not allow a subclass to have a variable with the same name as a variable in its superclass, if that variable is a Field instance. I need a subclass to modify this variable, which I call 'department'. Calling my classes super and sub, I need sub to modify the department variable it inherits from super. If I redeclare it, Django throws a field error. Of course, if I don't, department is not in scope for reassignment. If super has no department I get database errors. I get weird behaviour when I try rewriting init: def __init__(self): super(theSuperClass, self).__init__() TypeError: super(type, obj): obj must be an instance or subtype of type Anyone have any idea how to do this?

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• How to nicely inform to the user that an unknown error has happened?

  - by Jaime Soriano

  There are several guidelines for error reporting, that are usually based on giving to the user useful information when he or she does something wrong, but to give this kind of information you need to be handling the error and know that it can happen. There are also tons of articles about designing 404 error pages. But, what can you do when it's a new, unhandled error provoked by a failure in the shoftware? Are there some guidelines about how to nicely report totally unexpected errors in a web site, as an unexpected error 500? What header message should be shown in that case? something like "Sorry, an unexpected error has ocurred" would be enough? What information should be given? Should it have mechanisms to help to report the failure to developers? Which ones?

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• Creating an AJAX Form for a Polymorphic Object in Rails

  - by Isaac Yerushalmi

  I am trying to create an AJAX form for a polymorphic associated model. I created "Comments" which have a polymorphic association with all objects you can comment on (i.e. user profiles, organization profiles, events, etc). I can currently add comments to objects using a form created by: form_for [@commentable, @comment] do |f| I am trying to make this form via Ajax but I keep getting errors. I've tried at least ten different pieces of code, using remote_form_tag, remote_form_for, etc..with all different options, and nothing works. The comment does not get inserted into the database. Can anyone please tell me how I can make the above form ajax-enabled?

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• wcf service on mobile 5.0

  - by user554271

  hi everyone, I have writed a primitive wcf (vs 2010) service and created proxy files by svcutil. Later I created a mobile project on vs2008 and added proxy files on project but this error occured. Error 1 The type or namespace name 'ServiceContractAttribute' does not exist in the namespace 'System.ServiceModel' (are you missing an assembly reference?) C:\Users\Abb\Documents\Visual Studio 2008\Projects\WCF\MobileService\MobileClient\Sample.cs the proxy files runs well on console application (vs 2008) but there is errors on mobile. System.ServiceModel doesnot support ServiceContractAttribute.

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• Maven project dependecy against JDK version

  - by Andrea Polci

  I have projects that need to be build with a specific version of the JDK. The problem isn't in the source and target parameters but in the jars of the runtime used during compilation. In some cases I get a compilation error if I try to compile with the wrong JDK, but sometimes the build is successful and I get runtime errors when using the jars. For example in eclipse I have the ability to establish the execution enviroment for the project in the .classpath file. Is there a way to handle such situation in maven? What I would like to have is the ability to handle JRE dependency like other dependencies of the project in the POM file.

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• Python If Statement Defaults to an elif

  - by Brad Carvalho

  Not sure why my code is defaulting to this elif. But it's never getting to the else statement. Even going as far as throwing index out of bound errors in the last elif. Please disregard my non use of regex. It wasn't allowed for this homework assignment. The problem is the last elif before the else statement. Cheers, Brad if item == '': print ("%s\n" % item).rstrip('\n') elif item.startswith('MOVE') and not item.startswith('MOVEI'): print 'Found MOVE' elif item.startswith('MOVEI'): print 'Found MOVEI' elif item.startswith('BGT'): print 'Found BGT' elif item.startswith('ADD'): print 'Found ADD' elif item.startswith('INC'): print 'Found INC' elif item.startswith('SUB'): print 'Found SUB' elif item.startswith('DEC'): print 'Found DEC' elif item.startswith('MUL'): print 'Found MUL' elif item.startswith('DIV'): print 'Found DIV' elif item.startswith('BEQ'): print 'Found BEQ' elif item.startswith('BLT'): print 'Found BLT' elif item.startswith('BR'): print 'Found BR' elif item.startswith('END'): print 'Found END' elif item.find(':') and item[(item.find(':') -1)].isalpha(): print 'Mya have found a label' else: print 'Not sure what I found'

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• Codeigniter Template library, add_js() method

  - by Karl

  using This Template Library when i try and use the add_js() function it errors out. I add the regions $_scripts to the template header file but when i load the page it says undefined variable _scripts. any thoughts? changed <?= $_scripts ?> to <?= (isset($_scripts)) ? $_scripts : “”; ?> and obviously i lose the error but the js file still isnt loading. I did an echo at each step though the add_js() method and the output is correct. I also did an output of $this-js and they both had the corret output. So it gets through the get_js method fine and sets the class variable fine but i dont get anything added to the actual page.

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• json jquery post request

  - by John

  <script type="text/javascript"> $(document).ready(function() { $("a").click(function() { var content = $('#content').html(); var data = {"content":content}; $.ajax({ type: "POST", dataType: "json", url: "ajax.php", data: {content:content}, success function (data) { alert('Hello!'); } }); }); }); </script> <div id="content"><?php echo $content; ?></div> ajax.php echo json_encode($_POST['content']); ?> Nothing happens... WhatI really want to achieve is to get that alert box and get the return data, but I am lost since I don't get any errors or nothing.

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• Can I detect unused extra parameters passed to javascript methods?

  - by Pablojim

  In Javascript I can call any method with more than the necessary amount of parameters and the extra parameters are silently ignored. e.g. letters = ['a','b','c'] //correct letters.indexOf('a') //This also works without error or warning letters.indexOf('a', "blah", "ignore me", 38) Are there ways to detect cases where this occurs? My motivation is that in my experience cases where this occurs are usually bugs. Identification of these by code analysis or at runtime would help track these errors down. These cases are especially prevalent where people are expecting alterations to base types which may not have occurred. Logging a warning where this happens e.g. Date.parse('02--12--2012', 'dd--MM--YYYY') Notes: To be clear I would like a solution that doesn't involve me sprinkling checks all over my code and other peoples' code.

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• Adding Apache common dependency to Play Framework 2.0

  - by Mooh

  i want to import org.apache.commons.io but i'm getting this error: [info] Compiling 1 Java source to /home/ghost/Bureau/app/play-2.0.1/waf/target/scala-2.9.1/classes... [error] /home/ghost/Bureau/app/play-2.0.1/waf/app/controllers/Application.java:9: error: package org.apache.commons.io does not exist [error] import org.apache.commons.io.*; [error] ^ [error] /home/ghost/Bureau/app/play-2.0.1/waf/app/controllers/Application.java:41: error: cannot find symbol [error] FileUtils.copyFile(file, destinationFile); [error] ^ [error] symbol: variable FileUtils [error] location: class Application [error] 2 errors [error] {file:/home/ghost/Bureau/app/play-2.0.1/waf/}waf/compile:compile: javac returned nonzero exit code [error] application - Play can't find package org.apache.commons.io . How i can i add it as a dependency ?

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• "Can't Connect to Server" from 2nd virtual host on VPS

  - by chaoskreator

  I'm using Debian 7 Wheezy and Apache 2.2.22, and I'm setting up Virtual Hosts for a number of websites on my VPS. I've successfully configured the VirtualHost directives for one of the sites, but the second one continually gives "Problem Loading Page" in Firefox. I've run configtest and it has verified all my syntax is correct, and I've checked all the permissions. Everything on the 2nd domain is pretty much copy/pasted from the first, so I'm not sure what the issue is, as there are no entries into /var/log/apache2/error.log other than where I have reloaded the configurations: /# cat /var/log/apache2/error.log [Thu May 29 01:19:00 2014] [notice] Graceful restart requested, doing restart [Thu May 29 01:19:00 2014] [info] Init: Seeding PRNG with 656 bytes of entropy [Thu May 29 01:19:00 2014] [info] Init: Generating temporary RSA private keys (512/1024 bits) [Thu May 29 01:19:00 2014] [info] Init: Generating temporary DH parameters (512/1024 bits) [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(253): shmcb_init allocated 512000 bytes of shared memory [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(272): for 511920 bytes (512000 including header), recommending 32 subcaches, 133 indexes each [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(306): shmcb_init_memory choices follow [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(308): subcache_num = 32 [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(310): subcache_size = 15992 [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(312): subcache_data_offset = 3208 [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(314): subcache_data_size = 12784 [Thu May 29 01:19:00 2014] [debug] ssl_scache_shmcb.c(316): index_num = 133 [Thu May 29 01:19:00 2014] [info] Shared memory session cache initialised [Thu May 29 01:19:00 2014] [info] Init: Initializing (virtual) servers for SSL [Thu May 29 01:19:00 2014] [info] mod_ssl/2.2.22 compiled against Server: Apache/2.2.22, Library: OpenSSL/1.0.1e [Thu May 29 01:19:00 2014] [notice] Apache/2.2.22 (Debian) PHP/5.4.4-14+deb7u9 mod_ssl/2.2.22 OpenSSL/1.0.1e mod_perl/2.0.7 Perl/v5.14.2 configured -- resuming normal operations [Thu May 29 01:19:00 2014] [info] Server built: Mar 4 2013 22:05:16 [Thu May 29 01:19:00 2014] [debug] prefork.c(1023): AcceptMutex: sysvsem (default: sysvsem) I've ensured to enable each vhost with a2ensite {sitename.conf} with no errors there, either. Below are the contents of the configuration files... /etc/apache2/apache2.conf # Global configuration # LockFile ${APACHE_LOCK_DIR}/accept.lock PidFile ${APACHE_PID_FILE} Timeout 300 KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 5 ## ## Server-Pool Size Regulation (MPM specific) ## # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # worker MPM # StartServers: initial number of server processes to start # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadLimit: ThreadsPerChild can be changed to this maximum value during a # graceful restart. ThreadLimit can only be changed by stopping # and starting Apache. # ThreadsPerChild: constant number of worker threads in each server process # MaxClients: maximum number of simultaneous client connections # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # event MPM # StartServers: initial number of server processes to start # MinSpareThreads: minimum number of worker threads which are kept spare # MaxSpareThreads: maximum number of worker threads which are kept spare # ThreadsPerChild: constant number of worker threads in each server process # MaxClients: maximum number of simultaneous client connections # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_event_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> # These need to be set in /etc/apache2/envvars User ${APACHE_RUN_USER} Group ${APACHE_RUN_GROUP} # # AccessFileName: The name of the file to look for in each directory # for additional configuration directives. See also the AllowOverride # directive. # AccessFileName .htaccess # # The following lines prevent .htaccess and .htpasswd files from being # viewed by Web clients. # <Files ~ "^\.ht"> Order allow,deny Deny from all Satisfy all </Files> DefaultType None HostnameLookups Off ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel debug # Include module configuration: Include mods-enabled/*.load Include mods-enabled/*.conf # Include list of ports to listen on and which to use for name based vhosts Include ports.conf # # The following directives define some format nicknames for use with # a CustomLog directive (see below). # If you are behind a reverse proxy, you might want to change %h into %{X-Forwarded-For}i # # LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %O" common LogFormat "%{Referer}i -> %U" referer LogFormat "%{User-agent}i" agent <Directory "/var/www"> Order allow,deny Allow from all Require all granted </Directory> # Include generic snippets of statements Include conf.d/ # Include the virtual host configurations: Include sites-enabled/*.conf NameVirtualHost *:80 /etc/apache2/sites-available/site1.net.conf <VirtualHost *:80> ServerName site1.net ServerAlias site1.net *.site1.net DocumentRoot "/var/www/site1" ErrorLog "/var/www/site1/logs/error.log" CustomLog "/var/www/site1/logs/access.log" vhost_combined <Directory "/var/www/site1"> Options None AllowOverride All Order allow,deny Allow from all Satisfy Any </Directory> </VirtualHost> /etc/apache2/sites-available/site2.com.conf <VirtualHost *:80> ServerName site2.com ServerAlias site2.com *.site2.com DocumentRoot "/var/www/site2" ErrorLog "/var/www/site2/logs/error.log" CustomLog "/var/www/site2/logs/access.log" vhost_combined <Directory "/var/www/site2"> Options None AllowOverride All Order allow,deny Allow from all Satisfy Any </Directory> </VirtualHost> I've also tried setting NameVirtualHost like: Listen 80 NameVirtualHost 23.88.121.82:80 NameVirtualHost 127.0.0.1:80 and the VirtualHost Directives: <VirtualHost 23.88.121.82:80> ... </VirtualHost> for both sites, but that causes the first site to fail, as well. I'm wondering if I need to set up individual IPs for each site, possibly? I have 2 more IPv4 and 3 IPv6 addresses available, if that would make a difference. Also, in the grand scheme of things, I will need to enable SSL for the first site. I've been reading that I'll need to basically just mimic the directives for listening on port 80, only on port 443, and make sure mod_ssl is enabled? EDIT: I just ran apache2 -t to test the config files that way, and got the error: apache2: bad user name ${APACHE_RUN_USER}. However, apachectl configtest returns Syntax OK. There are no other mentions of errors with the mutex anywhere else, however. I was pretty sure if there was an error with the user apache was supposed to run under, the server wouldn't start at all... EDIT 2: Restarting apache fixed the bad user name error.

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• VS2005 Compilation Problem with Settings

  - by vijay.j

  I am trying to integrate PJNSMTPCONNECTION CLASSES in my project; they say that those classes do not use MFC. My project is with the setting like MT, and using standard library linking. When I try to compile, I am getting CSTRING not defined and fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h> If I include afx.h and remove windows.h, I am getting iDLLMain already defined errors. How do I resolve these problems, please?

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