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JavaOne Latin America Early Bird Discount: R$300,00 Off

- by Tori Wieldt

Learn how to code in Java more efficiently, pick up Java best practices, and participate in world-class networking at JavaOne Latin America—all for R$300,00 less if you register by 16 November. Have you ever wondered how to construct embedded Java applications for next-generation smart devices? Want to profit from client-side solutions using JavaFX, or simply build modern applications in Java 7? Techniques for these and much more are showcased at JavaOne Latin America—and you’re invited! Choose from more than 50 sessions, multiple demos, plus keynotes and hands-on labs. Topics include: Core Java Platform JavaFX and Rich User Experiences Java EE, Web Services, and the Cloud Java ME, Java Embedded, and Java Card Secure Your Place Now—Register now! Para mais informações ou inscrição ligue para (11) 2875-4163.

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trouble running multiple domains on tomcat behind apache via mod_jk

- by mkoryak

I am having trouble setting up tomcat6 with 2 virtual hosts, behind apache2. if i have just one host defined in tomcat, and one jk worker, everything works fine. as soon as i define another jk worker and a corresponding tomcat host i get this error in jk.log: 9:3075328656] [info] ajp_connect_to_endpoint::jk_ajp_common.c (922): Failed opening socket to (69.164.218.75:8009) (errno=111) [Tue Feb 08 03:08:13 2011] [17159:3075328656] [error] ajp_send_request::jk_ajp_common.c (1507): (dogself) connecting to backend failed. Tomcat is probably not started or is listening on the wrong port (errno=111) [Tue Feb 08 03:08:13 2011] [17159:3075328656] [info] ajp_service::jk_ajp_common.c (2447): (dogself) sending request to tomcat failed (recoverable), because of error during request sending (attempt=2) [Tue Feb 08 03:08:13 2011] [17159:3075328656] [error] ajp_service::jk_ajp_common.c (2466): (dogself) connecting to tomcat failed. [Tue Feb 08 03:08:13 2011] [17159:3075328656] [info] jk_handler::mod_jk.c (2615): Service error=-3 for worker=dogself my tomcat server.xml looks like this: <Service name="Catalina"> <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" URIEncoding="UTF-8" redirectPort="8443" /> <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> <Engine name="Catalina" defaultHost="dogself.com"> <Realm className="org.apache.catalina.realm.UserDatabaseRealm" resourceName="UserDatabase"/> <Host name="dogself.com" appBase="webapps-dogself" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> </Host> <Host name="nousophia.com" appBase="webapps-test" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> </Host> </Engine> </Service> my workers.properties looks like this: # workers.properties - ajp13 # # List workers worker.list=dogself,nousophia # Define dogself worker.dogself.port=8009 worker.dogself.host=dogself.com worker.dogself.type=ajp13 worker.nousophia.port=8009 worker.nousophia.host=nousophia.com worker.nousophia.type=ajp13 tomcat is started/restarted i followed these directions for setting it up: http://stackoverflow.com/questions/1765399/linking-apache-to-tomcat-with-multiple-domains can someone confirm that it would work as above?

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AutoVue 20.2.1 for Agile Released

- by Angus Graham

Oracle's AutoVue 20.2.1 for Agile PLM is now available on Oracle's Software Delivery Cloud. This latest release allows Agile PLM customers to take advantage of new AutoVue 20.2.1 features in the following Agile PLM environments: 9.3.x, 9.2.2.x, 9.2.1.x. AutoVue 20.2.1 delivers improvements in the following areas: New Format Support: AutoVue 20.2 adds support for the latest versions of popular file formats including: 2D CAD: AutoCAD 2013 MCAD: Inventor 2013, AutoCAD Mechanical 2013, Unigraphics NX8, JT 9.2 through 9.5, CATIA v5-6 R2012, Creo Parametric 2.0 ECAD: Altium Designer New Platform Support: Client and server support has been extended to the following platforms: Java 7 JVM Google Chrome Browser Oracle VM 2 virtualization environment Installer Improvements: Ensures ports used by AutoVue are not in use - if they are, the admin will be prompted to select alternate ports. Click here to access the latest AutoVue Format Support Sheet.

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Managing Custom Series

- by user702295

Custom series that have been added should be done with client Defined Prefix, ex. ACME Final Forecast, so they are can be identified as non-standard series. With that said, it is not always done, so beginning in v7.3.0 there is a new column called Application_Id in the Computed_Fields table. This is the table that stores the Series information. Standard Series will have have a prefix similar to COMPUTED_FIELD, while a custom series will have an Application_Id value similar to 9041128B99FC454DB8E8A289E5E8F0C5. So a SQL that will return the list of custom series in your database might look something like this: select computed_title Series_Name, application_id from computed_fields where application_id not like '%COMPUTED_FIELD%' order by 1;

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Managing Custom Series

- by user702295

Custom series that have been added should be done with client Defined Prefix, ex. ACME Final Forecast, so they are can be identified as non-standard series. With that said, it is not always done, so beginning in v7.3.0 there is a new column called Application_Id in the Computed_Fields table. This is the table that stores the Series information. Standard Series will have have a prefix similar to COMPUTED_FIELD, while a custom series will have an Application_Id value similar to 9041128B99FC454DB8E8A289E5E8F0C5. So a SQL that will return the list of custom series in your database might look something like this: select computed_title Series_Name, application_id from computed_fields where application_id not like '%COMPUTED_FIELD%' order by 1;

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ASP.NET MVC 2 Released!

- by kaleidoscope

ASP.NET MVC 2 Released! ASP.NET MVC 2 Features ASP.NET MVC 2 adds a bunch of new capabilities and features. Some of the new features and capabilities include: § New Strongly Typed HTML Helpers § Enhanced Model Validation support across both server and client § Auto-Scaffold UI Helpers with Template Customization § Support for splitting up large applications into ‘Areas’ § Asynchronous Controllers support that enables long running tasks in parallel § Support for rendering sub-sections of a page/site using Html.RenderAction § Lots of new helper functions, utilities, and API enhancements § Improved Visual Studio tooling support More details can be found at http://www.azurejournal.com/2010/03/aspnet-MVC-2-released/ http://www.asp.net/mvc/ Anish, S

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Situations that require protecting files against tampering when stored on a users computer

- by Joel

I'm making a 'Pokémon Storage System' with a Client/Server model and as part of that I was thinking of storing an inventory file on the users computer which I do not wish to be edited except by my program. An alternative to this would be to instead to store the inventory file on the server and control it's editing by sending commands to the server but I was wondering if there are any situations which require files to be stored on a users computer where editing would be undesirable and if so how do you protect the files? I was thinking AES with some sort of checksum?

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SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

- by Barkat Ullah

Server details: RAM: 16GB HDD: 1000GB OS: Linux 2.6.32-220.7.1.el6.x86_64 Processor: 6 Core Please see the link below for my # top preview: I can often see the error mentioned in title in my plesk panel and my /etc/my.cnf configuration are as below: bind-address=127.0.0.1 local-infile=0 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql max_connections=20000 max_user_connections=20000 key_buffer_size=512M join_buffer_size=4M read_buffer_size=4M read_rnd_buffer_size=512M sort_buffer_size=8M wait_timeout=300 interactive_timeout=300 connect_timeout=300 tmp_table_size=8M thread_concurrency=12 concurrent_insert=2 query_cache_limit=64M query_cache_size=128M query_cache_type=2 transaction_alloc_block_size=8192 max_allowed_packet=512M [mysqldump] quick max_allowed_packet=512M [myisamchk] key_buffer_size=128M sort_buffer_size=128M read_buffer_size=32M write_buffer_size=32M [mysqlhotcopy] interactive-timeout [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid open_files_limit=8192 As my server httpd conf is set to /etc/httpd/conf.d/swtune.conf and the configuration is as below: at prefork.c: <IfModule prefork.c> StartServers 8 MinSpareServers 10 MaxSpareServers 20 ServerLimit 1536 MaxClients 1536 MaxRequestsPerChild 4000 </IfModule> If I run grep -i maxclient /var/log/httpd/error_log then I can see everyday this error: [root@u16170254 ~]# grep -i maxclient /var/log/httpd/error_log [Sun Apr 15 07:26:03 2012] [error] server reached MaxClients setting, consider raising the MaxClients setting [Mon Apr 16 06:09:22 2012] [error] server reached MaxClients setting, consider raising the MaxClients setting I tried to explain everything that I changed to keep my server okay, but maximum time my server is down. Please help me which parameter can I change to keep my server okay and my sites can load fast. It is taking too much time to load my sites.

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over reporting in google analytics - social media stats

- by colmcq

I have a client and their traffic from social media reads thus: 80% from facebook 1% from Twitter This suggestsd they are not exploiting twitter at all and this was in my presentation but my boss took it out claiming twitter stats are under reported in google analytics. I can't substantiate this claim and wonder where she got this idea from. Can anyone shed light on this? Are my stats wrong and should I disregard these figures? but 80-1 seems like one hell of an under report! thanks c

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Today is my first day in the land of backbone.js

- by Andrew Siemer - www.andrewsiemer.com

I am semi-excited to say that today is my first day into the land of backbone.js. This will of course take me into many other new javascript-y areas. As I have primarily been focused on building backend systems for the past many years…with no focus on client side bits…this will be all new ground for me. Very exciting! I am sure that this endeavor will lead to writing about many new findings along the way. Expect the subject of near future postings to not be related to MVC or server side code. I am starting this journey by reading through the online book “Backbone Fundamentals”. http://addyosmani.com/blog/backbone-fundamentals/ Has anyone read this yet? Any feed back on that title. I have read though Derrick Bailey’s thoughts here and here…also very good. Any suggestions on other nuggets of learning backbone?

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How do I manipulate the Url of my Silverlight testpage.aspx?

- by Daniel

I am making an XNA game using Silverlight over the web. My testpage.aspx is linked to from a previous page where the client selects certain elements. The testpage.aspx URL changes depending on what I have sent to it. Now in my mainpage.cs file I would like to call certain functions depending on what was passed, but I am unsure how to manipulate or even access the URL. Is there a specific class in the Silverlight library I can use? Thank you for your time.

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I Need a recommendation for a CMS application with ECommerce

- by Griff

Does anyone have any recommendation for an open source solution for a robust CMS application that has a fully featured ECommerce module? I have been looking into Drupal with Ubercart -- but it looks like Ubercart is not fully up to speed with Drupal 7, and the other modules for Ecommerce don't look as robust. The CMS system should support CMIS as both client and server, and be able to run in a cloud computing environment. The system could be written in any standard web programming language, although Java would be my preference. I'm posting this question here because it seems that all CMS systems provide ECommerce as an afterthought, rather than a core feature.

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What impact would a young developer in a consultancy struggling on a project have?

- by blade3

I am a youngish developer (working for 3 yrs). I took a job 3 months ago as an IT consultant (for the first time, I'm a consultant). In my first project, all went will till the later stages where I ran into problems with Windows/WMI (lack of documentation etc). As important as it is to not leave surprises for the client, this did happen. I was supposed to go back to finish the project about a month and a half ago, after getting a date scheduled, but this did not happen either. The project (code) was slightly rushed too and went through QA (no idea what the results are). My probation review is in a few weeks time, and I was wondering, what sort of impact would this have? My manager hasn't mentioned this project to me and apart from this, everything's been ok and he has even said, at the beginning, if you are tight on time just ask for more, so he has been accomodating (At this time, I was doing well, the problems came later).

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Enable remote VNC from the commandline?

- by Stefan Lasiewski

I have one computer running Ubuntu 10.04, and is running Vino, the default VNC server. I have a second Windows box which is running a VNC client, but does not have any X11 capabilities. I am ssh'd into the Ubuntu host from the Windows host, but I forgot to enable VNC access on the Ubuntu host. On the Ubuntu host, is there a way for me to enable VNC connections from the Ubuntu commandline? Update: As @koanhead says below, there is no man page for vino (e.g. man -k vino and info vino return nothing), and vino --help doesn't show any help).

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How to properly URL/domain forward

- by NRGdallas

No clue on a title for this, someone feel free to suggest an edit. I have a client that has a website. He owns around 200 domains, and wants each domain to contain content from the main website. The header, footer, and navigation bars will remain the same for each domain, but the actual page content will vary (obviously duplicate content issues, open to suggestions) He wants each individual page to be its own separate domain, rather than a url within the main domain. (page1.com page2.com etc - NOT site.com/page1.html, however the file is actually hosted at site.com/page1.html - all links will direct to site.com/whatever accordingly) What would be the best place to start reading / learning on how to do this, and what concerns/considerations should be taken into mind?

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What performance degradation to expect with Nginx over raw Gunicorn+Gevent?

- by bouke

I'm trying to get a very high performing webserver setup for handling long-polling, websockets etc. I have a VM running (Rackspace) with 1GB RAM / 4 cores. I've setup a very simple gunicorn 'hello world' application with (async) gevent workers. In front of gunicorn, I put Nginx with a simple proxy to Gunicorn. Using ab, Gunicorn spits out 7700 requests/sec, where Nginx only does a 5000 request/sec. Is such a performance degradation expected? Hello world: #!/usr/bin/env python def application(environ, start_response): start_response("200 OK", [("Content-type", "text/plain")]) return [ "Hello World!" ] Gunicorn: gunicorn -w8 -k gevent --keep-alive 60 application:application Nginx (stripped): user www-data; worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 768; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; upstream app_server { server 127.0.0.1:8000 fail_timeout=0; } server { listen 8080 default; keepalive_timeout 5; root /home/app/app/static; location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_pass http://app_server; } } } Benchmark: (results: nginx TCP, nginx UNIX, gunicorn) ab -c 32 -n 12000 -k http://localhost:[8000|8080]/ Running gunicorn over a unix socket gives somewhat higher throughput (5500 r/s), but it still does't match raw gunicorn's performance.

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Do I have to deliver my utility and helper code to clients?

- by deviDave

Over the years I've created a bunch of Java utility and helper libraries which I just attach to new projects. Then, when I deliver code to my clients, I send all the code except for the libraries themselves (not JARs but source code files). A client complained that he could not compile the project as some libraries were missing. I tried explaining him about my own libraries, but he was not satisfied. How do you handle such situations? I am still apporting changes to these libraries often and I cannot compile JARs each time I start working on some new project. How to overcome this issue - not to share private libraries (personal intellectual property) and have happy clients?

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Application Migration: Windows/VB6 Apps to ASP.NET HTML5

- by Webgui

I would like to invite you to a fascinating webinar on extending applications to HTML5 and Mobile that we are doing in collaboration with Jeffrey S. Hammond, Principal Analyst serving Application Development & Delivery Professionals at Forrester Research.The webinar is free and it will will introduce the substantial changes brought on by the move to Web Applications and Open Web architectures, and the challenges it places on application development shops. We’ll also introduce how we at Gizmox are helping client navigate this mobile shift and evolve existing Windows applications with a new set of Transposition tools called Instant CloudMove. We will discuss the alternatives in the market to evolve your existing applications and focus on our transposition tools that reduce migration risk, minimize costs, and accelerate your time to market. So if you have locally installed Windows, VB6 or ASP applications that you are looking to enable as SaaS, offer over private or public Cloud platforms or allow end users with mobile accessibility then you shouldn't miss this webinar. Extending Windows Applications to HTML5 and Mobile Has Never Been Easier Tuesday, April 24, 2012 1:00 PM - 2:00 PM EST Free registration:http://www.visualwebgui.com/Gizmox/Landing/tabid/674/articleType/ArticleView/articleId/987/Extending-Windows-Applications-to-HTML5-and-Mobile-Has-Never-Been-Easier.aspx

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Register now for the FREE Tech Days Online Conference January 20th

- by Eric Nelson

The perfect solution to the “January blues” is a good solid few hours learning about great technology. The 'Build an app for that' Online Conference is exactly that, featuring demo-rich sessions on building applications for the browser, Windows 7, and Windows Phone 7. There are three tracks letting you choose which sessions are most relevant to you - whether you're just considering client development with Silverlight, or you've already got stuck in to an advanced project. We'll also explore new form factors such as Phone and Slate, and how to develop touch-based applications. Finally we'll cover the important subject of how to create beautifully designed user interfaces. Register now Agenda:

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Manipulating DOM using jQuery

- by bipinjoshi

By now you know how to alter existing elements and their attributes. jQuery also allows you insert, append, remove and replace elements from HTML DOM so that you can modify the document structure. For example, say you are calling some WCF service from client script and based on its return values need to generate HTML table on the fly. In this article I am going to demonstrate some of these jQuery features by developing a simple RSS gadget that grabs and displays RSS feed items in a web form.http://www.bipinjoshi.net/articles/90f4fbef-ef36-467b-8ca0-d0922a5902b0.aspx

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Best strategy (tried and tested) for using Box2D in a real-time multiplayer game?

- by Simon Grey

I am currently tackling real-time multiplayer physics updates for a game engine I am writing. My question is how best to use Box2D for networked physics. If I run the simulation on the server, should I send position, velocity etc to every client on every tick? Should I send it every few ticks? Maybe there is another way that I am missing? How has this problem been solved using Box2D before? Anyone with some ideas would be greatly appreciated!

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Game testing on Android - emulator or real devices?

- by n00bfuscator

I am working at a localization agency and we have been approached by a client about testing their games on iOS as well as Android. Testing on iOS seems fairly easy as we can just buy a couple of devices and we should be covered. For Android it seems to be completely different. From what i found, the emulator can cover all API levels, screen sizes and such, but i hear it's buggy and nothing could replace testing on real devices. With the vast amount of Android devices out there and the rate at which new devices are released it seems impossible to keep up. How can i test games (localization and functional) on Android covering all compatible devices?

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Implementing a JS templating engine with current PHP project

- by SeanWM

I'm currently working on a PHP project and quickly realizing how useful a templating engine would help me. I have a few tables whose table rows are looped out via a PHP loop. Is it possible to use just a JS templating engine (like Handlebarsjs) to also work with these tables? For example: $arr = array('red', 'green', 'blue'); echo '<table>'; foreach($arr as $value) { echo '<tr><td>' . $value . '</td></tr>'; } echo '</table>'; Now I want to add a column via an ajax call using a JS templating engine. Is this possible? Or do I have to use a templating engine for both server side and client side?

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What is the need of Odata when I have JSON ?

- by punkouter

I am trying to understand the point of Odata and when it would make sense. Right now how I work is I use ASP.NET and MVC/WebApi controller to serialize/deserialize objects into JSON and have javascript do something with it. From what I can tell the benefit of OData is being able to query directly from the URL ... But since I am writing the client and server code there is no need for that. Would anyone ever parse the results of a ODaya query in javascript?? Maybe OData is more about providing a generic endpoint for ALL clients to get detailed information from a query that JSON does not provide ? So if I was a provider of data then I suppose that is what odata is for ? Help me understand the purpose and use of REST/JSON/ODATA.

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MVC shared model different required fields on different type

- by kurasa

I have a model called Car and depending on what type of Car the user select the view is presented differently. For example the user selects from a grid of different cars and depending if it is a Volvo or a Kia or a Ford the view must allow different fields to be editable. For example with a Volvo the color is editable and is mandatory but with a Kia it is not. I would like to use the one Car class to bind the view but want the client side validation to pick up the required fields based on what type of car. I want to go only to one Action method for the Update what is a good way to approach this problem...? create a base class and inherit from it? will this give me binding problems..?

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