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  • How do I profile memory usage in my project

    - by Gacek
    Are there any good, free tools to profile memory usage in C# ? Details: I have a visualization project that uses quite large collections. I would like to check which parts of this project - on the data-processing side, or on the visualization side - use most of the memory, so I could optimize it. I know that when it comes to computing size of the collection the case is quite simple and I can do it on my own. But there are also certain elements for which I cannot estimate the memory usage so easily. The memory usage is quite big, for example processing a file of size 35 MB my program uses a little bit more than 250 MB of RAM.

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  • Writing a report

    - by wvd
    Hello all, Since some time I've been investigating more time into profiling things better, really think about how to do a thing and why. Now I'm going to start a new project, where I will be writing a report about. The report will be about anything what I wrote in the project, why, and I'll be investigating some things and do particular research about them. I've seen some reports, such as game programming in Haskell using FRP. However, after reading several reports they all seem to be build different. I have a few questions about writing a report: 1] What are the things I really should include, and what are the things I really shouldn't include? 2] Is it useful to include graphs about different methods/approaches to a several problem, where you only included one into your project, to show WHY you didn't include the other methods. Or should I just explain the method/approach used into the project. 3] Should I only be writing the report after I've completed the project, or should I also write pages about what I expect, how I'm going to build the software? Thanks, William van Doorn

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  • Maintaining traceability up-to-date as project evolves

    - by Catalin Piti?
    During various projects, I needed to make sure that the use case model I developed during the analysis phase is covering the requirements of the project. For that, I was able to have some degree of traceability between requirement statements (uniquely identified) and use cases (also uniquely identified). In some cases, enabling traceability implied some additional effort that I considered (and later proved) to be a good investment. Now, the biggest problem I faced was to maintain this traceability later, when things started to change (as a result of change requests, or as a result of use case changes). Any ideas of best practices for traceability maintenance? (It can apply to other items in the project - e.g. use cases and test cases, or requirements and acceptance test cases) Later edit Tools might help, but they can't detect gaps or errors in traceability. Navigation... maybe, but no warranty that the traceability is up-to-date or correct after applying the changes.

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  • Spring / Hibernate project with Tomcat and JQuery.

    - by Tiago
    Hi, I have a Dynamic Web Project that implements Spring and Hibernate using a Tomcat Server (v6). I'm lauching Tomcat with my Eclipse Galileo and I'm not getting any errors in the console but Tomcat is rendering my webpages randomly. The page just keep loading but without displaying anything, there's nothing on the console either. When I go in debug mode, it goes throught the right steps, everything seems alright. When I display the source code on the web browser (Firefox latest build) it shows me the right code that is needed to display the page I called. What am I not getting here? Plus when I stop Tomcat, it renders a part of the page. I'm wondering if JQuery could be the problem? The thing is that it's a collaborative project and that the others managed to run the web application in the most alright way. Please, share your experience with me.

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  • how often is a project scrapped?

    - by I__
    first example: i worked on a vb.net application for several months. the client paid, said thank you, and posted it on their website. their site is not functional and has not been functional for a while. another company asked me to develop a c# application for their biotech business. i worked on it for a year. they paid me, said thank you. the project was not finished but they just forgot about it. how often do you get a project, get paid for it, and then the client completely forgets about it? they dont ask for support, and they just leave it hanging. does this happen often?

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  • Version control PHP Web Project

    - by Adam Lerman
    We have a php project that we would like to version control. Right now there are three of us working on a "Dev" version of the project that all have our Eclipse linked to it with just an external folder, and thus no version control. What is the right way, and what is the best way, to version control this (not necessarily the same I dont think) We have a SVN set up but just need to find a good way to check in and check out that lets us test on the dev server. Any ideas?

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  • In what package should a "Settings" class be placed?

    - by Tom
    I'm in the middle of building an application but found myself too easily creating new packages without keeping the project's structure in mind. Now, I'm trying to redo the whole project structure on paper first. I am using a Settings class with public properties, accessed as settings for several other classes around the project. Now, since this Settings class applies for the whole project, I am unsure if it should be packaged and if so, in what kind of package should it exist? Or should it be in the root (the default package) with the main application class? I've been thinking about putting it in my utils package, then again I don't think it really is an utlity. Any strategies on how to decide on such package structure for example for a Settings class?

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  • Sharing Code, Images and Core Data models across iPhone and Mac project

    - by Robert
    Hi, I am maintaining a fairly large mac project and an iphone client for this project. Some code as well as some images and core data models are shared between these two projects. I want to create a shared framework containing this shared components but to my surprise, frameworks like we cocoa developers known them are not supported on the iphone os. Currently I see the following options: a) Include the files in both projects (much tedious work) b) Create a static library for both projects and manually copying the images/core data models c) Create a static lib for iphone and a framework for mac Any suggestions?

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  • Utilizing a third party application for GitHub in a django project

    - by Smock
    I'm trying to use a third party application located here: git://github.com/Star2Billing/django-audiofield.git I'm using Aptana Studio as my IDE. I created my project and then I clicked on the project and imported the app from the github location. It looked like it imported. I wanted to check that it imported properly before beginning any real coding so I performed manage.py validate. I got a message that stated: "No module named audiofield". I added the app to my Installed Apps settings and followed the installation instructions. I'm not sure if I'm importing it incorrectly. Also, I'm using virtualenv in Aptana. I'm not sure if this may have added to the problem. Please help.

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  • Header Files Cross Project

    - by Mike
    So I have two projects, A and B, where B is dependent on A (A is a library, while B is a console application). A uses the boost library, and has been configured to include the header and library files, but B has not. Visual studio throws an error saying the Boost Header files cannot be found (in project B). For example: error C1083: Cannot open include file: 'boost/asio.hpp': No Such file or directory [Project: B] My question is: Is there a way such that B does not have to include the Boost library as well?

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  • Help in restructuring a project

    - by mrblah
    I have a commerce application, asp.net mvc. I want it to be extensible in the sense others can create other payment providers, as long as they adhere to the interfaces. /blah.core /blah.web /blah.Authorize.net (Implementation of a payment provider using interfaces Ipaymentconfig and paymentdata class) Now the problem is this: /blah.core - PaymentData /blah.core.interfaces - IPaymentConfig where Payment Data looks like: using blah.core; public class PaymentData { public Order Order {get;set;} } IPayment data contains classes from blah.core like the Order class. Now I want to use the actual Authorize.net implementation, so when I tried to reference it in the blah.core project I got a circular dependency error. How could I solve this problem? Many have said to break out the interfaces into their own project, but the problem is PaymentData references entities that are found in blah.core also, so there doesn't seem to be a way around this (in my head anyhow). How can I redesign this?

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  • Default http/admin port in dropwizard project

    - by mithrandir
    I have a dropwizard project and I have maintained a config.yml file at the ROOT of the project (basically at the same level as pom.xml). Here I have specified the HTTP port to be used as follows: http: port:9090 adminPort:9091 I have the following code in my TestService.java file public class TestService extends Service<TestConfiguration> { @Override public void initialize(Bootstrap<TestConfiguration> bootstrap) { bootstrap.setName("test"); } @Override public void run(TestConfiguration config, Environment env) throws Exception { // initialize some resources here.. } public static void main(String[] args) throws Exception { new TestService().run(new String[] { "server" }); } } I expect the config.yml file to be used to determine the HTTP port. However the app always seems to start with the default ports 8080 and 8081. Also note that I am running this from eclipse. Any insights as to what am I doing wrong here ?

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  • Updating textfield in doctrine produces an exception

    - by james-murphy
    I have a textfield that contains say for example the following text:- "A traditional English dish comprising sausages in Yorkshire pudding batter, usually served with vegetables and gravy." This textfield is in a form that simply updates an item record using it's ID. If I edit part of the textfield and replace "and gravy." with "humous." So that the textfield now contains "A traditional English dish comprising sausages in Yorkshire pudding batter, usually served with vegetables and humous." I get the following exception:- Fatal error: Uncaught exception 'Doctrine_Query_Exception' with message 'Unknown component alias humous' in C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php:780 Stack trace: C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php(767): Doctrine_Query_Abstract-getQueryComponent('humous') C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Set.php(58): Doctrine_Query_Abstract-getAliasDeclaration('humous') C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php(2092): Doctrine_Query_Set-parse('i.details = 'A ...') C:\Projects\nitrous\lightweight\system\database\Doctrine\Query.php(1058): Doctrine_Query_Abstract-_processDqlQueryPart('set', Array) C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php(971): Doctrine_Query-getSqlQuery(Array) C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php(1030): Doctrine_Query_Abstract-_execute(Array) C:\Projects\nitrous\lightweight\system\appl in C:\Projects\nitrous\lightweight\system\database\Doctrine\Query\Abstract.php on line 780 I'm using Doctrine 1.0.6 hooked into CodeIgniter 1.7.0 if anyone is interested. My doctrine query that actually performs the update looks as follows:- public function updateItems($id, $arrayItem) { $query = new Doctrine_Query(); $query->update('Item i'); foreach($arrayItem as $key => $value) { $query->set('i.'.$key, "'".$value."'"); } $query->where('i.id = ?', $id); return $query->execute(); } This seems bizarre because if i replace the entire string "A traditional English dish comprising sausages in Yorkshire pudding batter, usually served with vegetables and humous." with something completely different like just "test" it doesn't throw an exception and works just fine. This baffles me... is it a bug in Doctrine or have I missed something?

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  • Debugging Django project problem.

    - by Wasim
    Hi all, I asked this question before, but had no replies, maybe I wasn't so clear. I'm trying to debug a django project using MySQL database. If I run the admin or trying to use the shell to communicate to the data base every thing is well and I can do every thing. I installed MySQLdb for Python 2.6. I installed PyDev on my Apatana studio. Configured the Debugging with runserver 8001 --noreload. When I start debugging , When I arrive to the following code in C:\Python26\Lib\site-packages\django\db\backends\mysql\base.py try: import MySQLdb as Database except ImportError, e: from django.core.exceptions import ImproperlyConfigured raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e) I get an import error : django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: DLL load failed: The specified module could not be found. I trying to ge more deeply with the import MySQLdb as Database line , it goes to the C:\Python26\Lib\site-packages\MySQLdb__init__.py and fail in the line import _mysql. I can't understand the problem. When running the Django admin every thing is ok, but with debugging it fails to work. Any help please. Thanks in advance.

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  • Deploying ASP.Net MVC application

    - by a_m0d
    I've recently reached the stage where an ASP.net MVC application I am developing is ready to be deployed to the production server. I've worked out how to publish the application - I've got all the files on the server, and can access them over the internet. However, I can't work out how to deploy my database. The server has the SQL Server Management Studio Express installed, as the database used is a SQL Server Express database. I have the server instance up and running - I just don't know how to add the tables, etc. to the database. I have created the "CREATE TABLE" scripts on the development machine, but as far as I can see, Management Studio does not provide any way to actually run these scripts. I have looked through all the menu items that I could see, and none of them worked. Even using the "Create new query..." option and pasting the script in didn't work. When I try "File-Open..." and select a script to run, set the correct database from the dropdown list on the toolbar, and then execute the script, it complains about not finding the database file (even when I set the USE [...] statement to the correct path. Deleting the USE [...] statement, the script complains that it can't find the [dbo].[Invoices] object; however, it shouldn't be able to find it, because its trying to create it! tl;dr: What's the best way to make sure that the database on the production machine matches the database on my development machine?

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  • Managing multiple customer databases in ASP.NET MVC application

    - by Robert Harvey
    I am building an application that requires separate SQL Server databases for each customer. To achieve this, I need to be able to create a new customer folder, put a copy of a prototype database in the folder, change the name of the database, and attach it as a new "database instance" to SQL Server. The prototype database contains all of the required table, field and index definitions, but no data records. I will be using SMO to manage attaching, detaching and renaming the databases. In the process of creating the prototype database, I tried attaching a copy of the database (companion .MDF, .LDF pair) to SQL Server, using Sql Server Management Studio, and discovered that SSMS expects the database to reside in c:\program files\Microsoft SQL Server\MSSQL.1\MSSQL\DATA\MyDatabaseName.MDF Is this a "feature" of SQL Server? Is there a way to manage individual databases in separate directories? Or am I going to have to put all of the customer databases in the same directory? (I was hoping for a little better control than this). NOTE: I am currently using SQL Server Express, but for testing purposes only. The production database will be SQL Server 2008, Enterprise version. So "User Instances" are not an option.

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  • Connection Pool Strategy: Good, Bad or Ugly?

    - by Drew
    I'm in charge of developing and maintaining a group of Web Applications that are centered around similar data. The architecture I decided on at the time was that each application would have their own database and web-root application. Each application maintains a connection pool to its own database and a central database for shared data (logins, etc.) A co-worker has been positing that this strategy will not scale because having so many different connection pools will not be scalable and that we should refactor the database so that all of the different applications use a single central database and that any modifications that may be unique to a system will need to be reflected from that one database and then use a single pool powered by Tomcat. He has posited that there is a lot of "meta data" that goes back and forth across the network to maintain a connection pool. My understanding is that with proper tuning to use only as many connections as necessary across the different pools (low volume apps getting less connections, high volume apps getting more, etc.) that the number of pools doesn't matter compared to the number of connections or more formally that the difference in overhead required to maintain 3 pools of 10 connections is negligible compared to 1 pool of 30 connections. The reasoning behind initially breaking the systems into a one-app-one-database design was that there are likely going to be differences between the apps and that each system could make modifications on the schema as needed. Similarly, it eliminated the possibility of system data bleeding through to other apps. Unfortunately there is not strong leadership in the company to make a hard decision. Although my co-worker is backing up his worries only with vagueness, I want to make sure I understand the ramifications of multiple small databases/connections versus one large database/connection pool.

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  • C# Multiple Property Sort

    - by Ben Griswold
    As you can see in the snippet below, sorting is easy with Linq.  Simply provide your OrderBy criteria and you’re done.  If you want a secondary sort field, add a ThenBy expression to the chain.  Want a third level sort?  Just add ThenBy along with another sort expression. var projects = new List<Project>     {         new Project {Description = "A", ProjectStatusTypeId = 1},         new Project {Description = "B", ProjectStatusTypeId = 3},         new Project {Description = "C", ProjectStatusTypeId = 3},         new Project {Description = "C", ProjectStatusTypeId = 2},         new Project {Description = "E", ProjectStatusTypeId = 1},         new Project {Description = "A", ProjectStatusTypeId = 2},         new Project {Description = "C", ProjectStatusTypeId = 4},         new Project {Description = "A", ProjectStatusTypeId = 3}     };   projects = projects     .OrderBy(x => x.Description)     .ThenBy(x => x.ProjectStatusTypeId)     .ToList();   foreach (var project in projects) {     Console.Out.WriteLine("{0} {1}", project.Description,         project.ProjectStatusTypeId); } Linq offers a great sort solution most of the time, but what if you want or need to do it the old fashioned way? projects.Sort ((x, y) =>         Comparer<String>.Default             .Compare(x.Description, y.Description) != 0 ?         Comparer<String>.Default             .Compare(x.Description, y.Description) :         Comparer<Int32>.Default             .Compare(x.ProjectStatusTypeId, y.ProjectStatusTypeId));   foreach (var project in projects) {     Console.Out.WriteLine("{0} {1}", project.Description,         project.ProjectStatusTypeId); } It’s not that bad, right? Just for fun, let add some additional logic to our sort.  Let’s say we wanted our secondary sort to be based on the name associated with the ProjectStatusTypeId.  projects.Sort((x, y) =>        Comparer<String>.Default             .Compare(x.Description, y.Description) != 0 ?        Comparer<String>.Default             .Compare(x.Description, y.Description) :        Comparer<String>.Default             .Compare(GetProjectStatusTypeName(x.ProjectStatusTypeId),                 GetProjectStatusTypeName(y.ProjectStatusTypeId)));   foreach (var project in projects) {     Console.Out.WriteLine("{0} {1}", project.Description,         GetProjectStatusTypeName(project.ProjectStatusTypeId)); } The comparer will now consider the result of the GetProjectStatusTypeName and order the list accordingly.  Of course, you can take this same approach with Linq as well.

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  • Real-Time Multi-User Gaming Platform

    - by Victor Engel
    I asked this question at Stack Overflow but was told it's more appropriate here, so I'm posting it again here. I'm considering developing a real-time multi-user game, and I want to gather some information about possibilities before I do some real development. I've thought about how best to ask the question, and for simplicity, the best way that occurred to me was to make an analogy to the field (or playground) game darebase. In the field game of darebase, there are two or more bases. To start, there is one team on each base. The game is a fancy game of tag. When two people meet out in the field, the person who left his base most recently timewise captures the other person. They then return to that person's base. Play continues until everyone is part of the same team. So, analogizing this to an online computer game, let's suppose there are an indefinite number of bases. When a person starts up the game, he has a team that is located at, for example, his current GPS coordinates. It could be a virtual world, but for sake of argument, let's suppose the virtual world corresponds to the player's actual GPS coordinates. The game software then consults the database to see where the closest other base is that is online, and the two teams play their game of virtual tag. Note that the user of the other base could have a different base than the one run by the current user as the closest base to him, in which case, he would be in two simultaneous battles, one with each base. When they go offline, the state of their players is saved on a server somewhere. Game logic calls for the players to have some automaton-logic of some sort, so they can fend for themselves in a limited way using basic rules, until their user goes online again. The user doesn't control the players' movements directly, but issues general directives that influence the players' movement logic. I think this analogy is good enough to frame my question. What sort of platforms are available to develop this sort of game? I've been looking at smartfoxserver, but I'm not convinced yet that it is the best option or even that it will work at all. One possibility, of course, would be to roll out my own web server, but I'd rather not do that if there is an existing service out there already that I could tap into. I will be developing for iOS devices at first. So any suggestions would be greatly appreciated. I think I need to establish the architecture first before proceeding with this project. Note that darbase is not the game I intend to implement, but, upon reflection, that might not be a bad idea either.

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  • Cloudera Manager CDH5 - Installation Failure on Oozie Database

    - by Nerrve
    While doing the installation, i keep getting a failure on the step "Creating Oozie database" java.lang.Exception: DB schema exists at org.apache.oozie.tools.OozieDBCLI.validateDBSchema(OozieDBCLI.java:877) at org.apache.oozie.tools.OozieDBCLI.createDB(OozieDBCLI.java:184) at org.apache.oozie.tools.OozieDBCLI.run(OozieDBCLI.java:127) at org.apache.oozie.tools.OozieDBCLI.main(OozieDBCLI.java:78) How do i fix this? Where do i get the password/username/dbname for the PostgreSQL database to drop the existing schema? I tried cat /etc/cloudera-scm-server/db*.properties | grep pass and /var/lib/cloudera-scm-server-db/data/generated-password.txt but the passwords don't work!

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  • Graphite SQLite3 DatabaseError: attempt to write a readonly database

    - by Anadi Misra
    Running graphite under apache httpd, with slqite database, I have the correct folder permissions [root@liaan55 httpd]# ls -ltr /var/lib | grep graphite drwxr-xr-x. 2 apache apache 4096 Aug 23 19:36 graphite-web and [root@liaan55 httpd]# ls -ltr /var/lib/graphite-web/ total 68 -rw-r--r--. 1 apache apache 65536 Aug 23 19:46 graphite.db syncdb also seems to have gone fine [root@liaan55 httpd]# sudo -su apache bash-4.1$ whoami apache bash-4.1$ python /usr/lib/python2.6/site-packages/graphite/manage.py syncdb /usr/lib/python2.6/site-packages/graphite/settings.py:231: UserWarning: SECRET_KEY is set to an unsafe default. This should be set in local_settings.py for better security warn('SECRET_KEY is set to an unsafe default. This should be set in local_settings.py for better security') /usr/lib/python2.6/site-packages/django/conf/__init__.py:75: DeprecationWarning: The ADMIN_MEDIA_PREFIX setting has been removed; use STATIC_URL instead. "use STATIC_URL instead.", DeprecationWarning) /usr/lib/python2.6/site-packages/django/core/cache/__init__.py:82: DeprecationWarning: settings.CACHE_* is deprecated; use settings.CACHES instead. DeprecationWarning Creating tables ... Creating table account_profile Creating table account_variable Creating table account_view Creating table account_window Creating table account_mygraph Creating table dashboard_dashboard_owners Creating table dashboard_dashboard Creating table events_event Creating table auth_permission Creating table auth_group_permissions Creating table auth_group Creating table auth_user_user_permissions Creating table auth_user_groups Creating table auth_user Creating table django_session Creating table django_admin_log Creating table django_content_type Creating table tagging_tag Creating table tagging_taggeditem You just installed Django's auth system, which means you don't have any superusers defined. Would you like to create one now? (yes/no): yes Username (leave blank to use 'apache'): root E-mail address: [email protected] Password: Password (again): Superuser created successfully. Installing custom SQL ... Installing indexes ... Installed 0 object(s) from 0 fixture(s) bash-4.1$ exit and the local-settings.py file is as follows STORAGE_DIR = '/var/lib/graphite-web' INDEX_FILE = '/var/lib/graphite-web/index' DATABASES = { 'default': { 'NAME': '/var/lib/graphite-web/graphite.db', 'ENGINE': 'django.db.backends.sqlite3', 'USER': '', 'PASSWORD': '', 'HOST': '', 'PORT': '' } } I still get this error [Sat Aug 23 19:47:17 2014] [error] [client 10.42.33.238] File "/usr/lib/python2.6/site-packages/django/db/backends/sqlite3/base.py", line 344, in execute [Sat Aug 23 19:47:17 2014] [error] [client 10.42.33.238] return Database.Cursor.execute(self, query, params) [Sat Aug 23 19:47:17 2014] [error] [client 10.42.33.238] DatabaseError: attempt to write a readonly database not sure what is missing in this configuration

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  • How to deploy local project to Amazon

    - by Nai
    I have a small webapp written in Python/Django which works fine on my local machine. I've been tinkering and setting up my server on the free tier of Amazon EC2 by following online tutorials. However, the tutorials I have found so far shows you how to setup your instance and stops there. So my question is, how do I get my local webapp onto my Amazon instance? FYI, I'm a sys admin/web dev. noob. Thanks.

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