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  • reduce memory footprint of java virtual machine

    - by Lorenzo Boccaccia
    I've a citrix server where multiple users use a multiple java application. Is there a way to reduce the memory footprint of the jvm itself? The max heap is already set fairly low (64MB), as the permgen (32MB) space and we're to the point that the jvm itself uses way more memory than the application itself (the committed area is around 350MB) I'm looking for a way to reduce the jvm ram usage or to make the all the applications run within the same jvm or any other way of sharing common pages between running jvm (if possible) or try switch to switch to a jvm if a jvm exists having optimizations relative to this scenario currently using windows 2003 server and sun java virtual machine 1.6

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  • Creating an expandable, cross-platform compatible program "core".

    - by Thomas Clayson
    Hi there. Basically the brief is relatively simple. We need to create a program core. An engine that will power all sorts of programs with a large number of distinct potential applications and deployments. The core will be an analytics and algorithmic processor which will essentially take user-specific input and output scenarios based on the information it gets, whilst recording this information for reporting. It needs to be cross platform compatible. Something that can have platform specific layers put on top which can interface with the core. It also needs to be able to be expandable, for instance, modular with developers being able to write "add-ons" or "extensions" which can alter the function of the end program and can use the core to its full extent. (For instance, a good example of what I'm looking to create is a browser. It has its main core, the web-kit engine, for instance, and then on top of this is has a platform-specific GUI and can also have add-ons and extensions which can change the behavior of the program.) Our problem is that the extensions need to interface directly with the main core and expand/alter that functionality rather than the platform specific "layer". So, given that I have no experience in this whatsoever (I have a PHP background and recently objective-c), where should I start, and is there any knowledge/wisdom you can impart on me please? Thanks for all the help and advice you can give me. :) If you need any more explanation just ask. At the moment its in the very early stages of development, so we're just researching all possible routes of development. Thanks a lot

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  • Compiling zip component for PHP 5.2.11 in MAMP PRO

    - by Zlatoroh
    I installed MAMP PRO on my Macbook Pro (10.6) some time ago. Now I would like to use zip functions in php. I found that I must add zip.so to my extension folder and edited php.ini. On my computer I have two different versions of PHP one in MAMP folder and other in user/lib which was pre-installed on my system. Now I wish to compile my zip library for MAMP version. I got zip sources for my version of PHP then in terminal called function /Applications/MAMP/bin/php5/bin/phpize so it uses mamp php version ./configure make then I moved compile zip.so to extensions/no-debug-non-zts-20060613. When MAMP is launched it returns this error [11-Apr-2010 16:33:27] PHP Warning: PHP Startup: zip: Unable to initialize module Module compiled with module API=20090626, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These options need to match in Unknown on line 0 Can somebody explain to me how to do this the right way.

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  • *nix OS that is easy to update to latest software

    - by rjstelling
    I need to configure a server (*nix) that runs our (bespoke) CMS and Applications. In the past I have defaulted to using Cent OS 5, but I find this outdated difficult to upgrade the software to the versions we require. For example, we need PHP 5.3, but CentOS 5 has 5.2. Updating is fine but breaks something else (normally MySQL support in PHP). Eventually it will get to a situation where I can't upgrade because of missing dependancies and incompatible versions. Error: Missing Dependency: httpd = 2.2.3-43.el5.centos.3 is needed by package httpd-devel-2.2.3-43.el5.centos.3.i386 (updates) Is there a better alternative OS for hassle free updates, I need: Apache 2.2.17 (the development version for apxs) MySQL 5.5.8 PHP 5.3.5

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  • Engineered to Inform, Inspire, Entertain

    - by Oracle OpenWorld Blog Team
    by Karen Shamban Take note! Oracle OpenWorld keynote lineup announced  The lineup for the keynotes at this year's Oracle OpenWorld conference has just been announced.  Expert speakers will provide insights into industry trends, the latest technology developments and futures, as well as key strategies for achieving business efficiency and innovation. Critical business drivers such as engineered systems, cloud computing, customer experience, and business analytics and big data will be featured topics. Executive keynotes include: Oracle CEO Larry Ellison on "Hardware and Software, Engineered to Work Together: Why It's a Different Approach" and "The Oracle Cloud: Where Social is Built In" Oracle President Mark Hurd discussing "Shift Complexity" with SVP of Oracle Database Development Andrew Mendelsohn,  and "See More, Act Faster: Oracle Business Analytics" Oracle EVP of Product Development Thomas Kurian focusing on "The Oracle Cloud: Oracle's Cloud Platform and Applications Strategy" Oracle EVP of Systems John Fowler, Oracle Chief Corporate Architect Edward Screven, and Oracle SVP of Systems Technology Juan Loiaza on "Oracle Cloud Infrastructure and Engineered Systems: Fast, Reliable, Virtualized" For more information on speakers, topics, and schedule, go to the Oracle OpenWorld Keynotes page.

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  • K-12 and Cloud considerations

    - by user736511
    Much like every other Public Sector organization, school districts in the US and Canada are under tremendous pressure to deliver consistent and modern services while operating with reduced budgets, IT personnel shortages, and staff attrition.  Electronic/remote learning and the need for immediate access to resources such as grades, calendars, curricula etc. are straining IT environments that were already burdened with meeting privacy requirements imposed by both regulators and parents/students.  One area viewed as a solution to at least some of the challenges is the use of "Cloud" in education.  Although the concept of "Cloud" is nothing new in education with many providers supplying educational material over the web, school districts defer previously-in-house-hosted services to established commercial vendors to accommodate document sharing, app hosting, and even e-mail.  Doing so, however, does not reduce an important risk, that of privacy.  As always, Cloud implementations are viewed in a skeptical manner because of the perceived reduction in sensitive data management and protection thereof, although with a careful approach and the right tooling, the benefits realized by Clouds can expand to security and privacy.   Oracle's comprehensive approach to data privacy and identity management ensures that the necessary tools are available to support regulations, operational efficiencies and strong security regardless of where the sensitive data is stored - on premise or a Cloud.  Common management tools, role-based access controls, access policy management and engineered systems provided by Oracle can be the foundational pieces on which school districts can build their Cloud implementations without having to worry about security itself. Their biggest challenge, and it is a positive one, is how to best take advantage of Oracle's DB Security and IDM functionality to reduce operational costs while enabling modern applications and data delivery to those who needs access to it. For more information please refer to http://www.oracle.com/us/products/middleware/identity-management/overview/index.html and http://www.oracle.com/us/products/database/security/overview/index.html.

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  • Wessty: Live with HTML 5 (2011 Speaker Tour)

    - by David Wesst
    That’s right: Wessty is on tour. Okay, the banner and the tour is a little over the top, but I am really excited about my upcoming speaking engagements to spread the word about HTML 5! I have already kicked off the tour with the Winnipeg Code Camp last weekend with the world premiere of HTML 5 for .NET Pro presentation, and the turn out fantastic. It was the last presentation of the day, but we still had some great questions about the new standard and got to see how HTML 5 can fit into .NET web applications today. In any case, above you can see the confirmed presentations that I will be doing so far in 2011, but there are a few more events that I have heard about that I hope to add to that list. Ultimately, expect that list to be updated over the course of the year as the year is young and there are plenty of conferences coming up! Presentation Resources As the tour continues, I will be posting the slides and the source code for the demonstrations up here on my site. They will be free of charge and give you the chance to review the demos and hopefully take advantage of some of the cool things you see in the presentations. Become part of the Tour If you are considering hosting an event where you think that HTML 5 could use a voice, drop me a line and let me know. I am always looking for opportunities to grow the tour to talk not just about HTML 5, but a variety of topics that relate to user interface and user experience development. This post also appears at http://david.wes.st

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  • Devoxx 2011 Started Today

    - by Yolande
    Devoxx 2011, organized by Java user group in Belgium, is the biggest Java conference in Europe. The first two University Days set the tone for the weeklong conference with its in-depth technical sessions lead by luminaries from the Java community and industry experts. Each day is a great mix of 3 hour sessions and hands-on labs, 30 minute Tools-in-Action sessions giving tips for faster and better application development and the traditional Birds-of-a-Feather sessions in the evening. Java sessions for today and tomorrow: - Next Gen Enterprise Apps - Bert Ertman and Paul Bakker talked about new Java EE 6 APIs that reduces the need for boilerplate code and configuration. - JavaFX 2.0 – A Java developer’s guide - Stephen Chin and Peter Pilgrim will give an overview of new version and how Java developers can take advantage of it - Java Rich Clients with JavaFX 2.0 - Richard Bair and Jasper Potts will get into JavaFX 2.0 APIs - Building an end-to-end application using Java EE 6 and NetBeans - Arun Gupta will showcase how to write Java EE 6 applications more effectively. - The OpenJDK Community BOF with Dalibor Topic Starting Tuesday, come by the Oracle booth to chat about technology, enter our raffle and have a beer every day at 18:45 The sessions will be available on Parleys website after the conference. In the meantime, you can learn a lot about those Java technologies on our website: - JavaFX 2.0 tutorials and documentation - OpenJDK - News from the GlassFish community - JavaEE 6 resources - JavaOne sessions

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  • How to host a scalable social networking app

    - by christopher-mccann
    I am in the middle of developing a social networking application for a very select user niche which could scale to a few million users. Right now I have always hosted applications on RackSpace Cloud and I have no issues with them at all - always been a really good service and never had any downtime. My question is though does anyone think that cloud computing is not the way to host scalable web apps? Or can anyone with experience of this recommend a better solution. I have always shunned trying to run big servers from my own facilities as I think it seems silly to go to the expense of bringing in big alternative power supplies and all the other necessary precautions when other companies already do this. I looked at managed hosting services but this proved to be a bit too expensive for us at the start and the scalability of it wasnt good enough - it would take a day or two to get a new server provisioned. Therefore I ended up on a cloud platform. If anyone has any recommendations or advice it would be greatly appreciated.

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  • Java Spotlight Episode 88: HTML 5 and JavaFX 2 with Gerrit Grunwalt

    - by Roger Brinkley
    Interview with Gerrit Grundwalt on HTML 5 and JavaFX 2. Joining us this week on the Java All Star Developer Panel is Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Java FX 2.1.1 Documentation updated on the docs.oracle.com/javafx website. Lightview: JavaFX 2 real-time visualizer for Glassfish JavaFX Programmatic POJO Expression Bindings (Part 1 & 2) The Enterprise Side of JavaFX - Leverage the power of FX Markup Language to define the UI for enterprise applications Events June 26-28, Jazoon, Zurich, Switzerland Jun 27, Houston JUG July 5, Java Forum, Stuttgart, Germany Jul 13-14, IndicThreads, Delhi July 30-August 1, JVM Language Summit, Santa Clara Feature InterviewGerrit Grunwald is working as a software engineer at Canoo Engineering AG (Basel, Switzerland). He is responsible for visualizations of all kinds. His technical interests include Java desktop development and specifically the subareas - JavaFX, Java Swing and HTML5 controls.He's a decent frequent blogger (http://www.harmonic-code.org), founder and leader of the Java User Group in Muenster (Germany), where he's also living. He has been involved in the IT industry since 1996, when he began to study physics at the University of Applied Sciences Muenster (Germany). Mail Bag What’s Cool Tab Sweep

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  • Which one is better offline method for large scale application

    - by Manish Pansiniya
    We've a big data management website used by several property. Some of our customers have downtime (they can't access net for an hour or two). We want our site to support offline data viewing and inventory management (typical data search and add/remove) and when the user goes online we can sync the changes back to our central database. Customers use several platforms like Windows, iOS, etc. We've been looking into several different options, here are the major choices - Develop offline web app supported in HTML5. Develop a 'fallback' mechanism and interact with data from the app cache as explained in here (http://www.htmlgoodies.com/html5/tutorials/introduction-to-offline-web- applications-using-) Develop a desktop based cross platform solution. I remember the old MONO which has been popular. Here's a post (What do you suggest for cross platform apps, including web cross-platform-apps-including-web) and another one (Technology choice for cross platform development (desktop and phone)? platform-development-desktop-and-phone?rq=1) I realize the the desktop solution might be hard to maintain and result in some compatibility issues and demand test environments. Can HTML5 handle moderate to high level complexity and data flow? Or would it be better to rely on a desktop based app for better scalability & performance?

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  • What options do I have for creating customized keyboard shortcuts?

    - by Moses
    As I am getting more heavily into programming as a job and no longer as a hobby, I am definitely in need of some ways to improve my productivity. One thing that would definitely help in that respect is being able to create customized keyboard shortcuts for text/code snippets. For instance, holding down CMD+L+O+R+E+M will output a paragraph or two of the Lorem ipsum filler text, or CMD+F+U creates a function declaration. What I am ideally looking for is a database where I can store formatted text snippets, bind them to my choice of keystrokes, and then have the text paste whenever I perform the associated keystrokes. Are there any stand-alone applications that can do this for a Mac. Also, are there any text editors / IDEs that have this ability built in?

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  • Why not have a High Level Language based OS? Are Low Level Languages more efficient?

    - by rtindru
    Without being presumptuous, I would like you to consider the possibility of this. Most OS today are based on pretty low level languages (mainly C/C++) Even the new ones such as Android uses JNI & underlying implementation is in C In fact, (this is a personal observation) many programs written in C run a lot faster than their high level counterparts (eg: Transmission (a bittorrent client on Ubuntu) is a whole lot faster than Vuze(Java) or Deluge(Python)). Even python compilers are written in C, although PyPy is an exception. So is there a particular reason for this? Why is it that all our so called "High Level Languages" with the great "OOP" concepts can't be used in making a solid OS? So I have 2 questions basically. Why are applications written in low level languages more efficient than their HLL counterparts? Do low level languages perform better for the simple reason that they are low level and are translated to machine code easier? Why do we not have a full fledged OS based entirely on a High Level Language?

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  • Perform action based on load avg

    - by sfx
    I'm running some web applications on an debian server and have to struggle with ddos attacks sometimes. It's eating up all my resources and I can't ssh anymore into the server. An idea was to drop all connections if the load avg is too high, so there are still resources for me and accept new connections if the load avg is low enough. Since this has to work under heavy load I'm afraid a cronjob wouldn't be fast enough or take too much resources. tl;dr: Is there a way to configure the behavior if the load avg is above a specific threshold?

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  • Intraforest user account merge with Active Directory

    - by Neobyte
    I have a scenario where there is a root domain (RD) and two child domains (CD1 and CD2). Users have accounts on both CD1 and CD2, with identical samAccountNames, names etc, and various applications either use the CD1 or CD2 account for authentication to resources. I need to collapse CD2 into CD1, so I want to merge the accounts together. However ADMT does not allow me this option (merge options are greyed out), I think because it does not support intraforest merge of accounts (although it does not explicitly state this anywhere in the documentation). My question is - what is the easiest way for me to merge these accounts? Ultimately all I really need (I think) is for the SID of CD2\user1 to be added to the SIDHistory of CD1\user1 - is there a tool that supports this? Computer accounts and profiles are not a concern for this scenario. Group migration is unlikely to be an issue either - CD2\user1 is usually granted resource access through membership of a group on CD1.

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  • how to make a very large radmind image, faster

    - by Wang
    Making the new Snow Leopard radmind image* for my lab involves manipulating over 50GB of applications, including passing them over the network. Each try takes four hours or more, and if it fails there's no apparent way to pick up again from partway through. Instead I have to delete all the data (a minutes-long operation) and start over. Furthermore, one successful upload just means now I get to test whether the image works; if it doesn't, I can look forward to repeating the upload as many times as I need to troubleshoot. How can I do this faster and/or smarter?

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  • Focus Follows Mouse or Sloppy Focus on Mac OS X

    - by jtimberman
    "Focus follows mouse" or "sloppy focus" is a feature common to X11 window managers on Linux/Unix, including GNOME, KDE, CDE, XFCE and window managers like Enlightenment, Fluxbox and Window Maker. It is also available via TweakUI on Windows. Some individual applications on OS X, like iTerm support it. What is it? Simply put, the window where the mouse pointer is has focus, rather than having to click a window for it to gain focus. Does the native GUI for OS X support this, with some hidden setting? Or, is there a good third party application that will do this?

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  • Openoffice.org: Mouse wheel one row at a time possible?

    - by Maksee
    I noticed this in Excel, now in OpenOffice.org calc. One small change in mouse wheel leads to 3 rows (line) change. Is it possible to change in Calc OR/AND in Excel? EDIT: Yes, I know about system wide setting about the number of lines for one notch of scroll. But in some applications this setting is interpreted related to size in pixels so scrolling is predictable, but for some like spreadsheet is not. Since the height of line in a cell differ depending of the cell content, with other setting as 1 you will have a guarantee of unpredictable content before your eyes with only one notch.

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  • Hot swapping for Linux web/database servers

    - by Art
    Is there a way to perform the following under Linux: There are two web servers, main and backup There are two database servers (postgres), main and backup Web Servers are in sync with each other, ie. configuration/content/applications are the same Backup database is continuously synced up with main database. If either of main servers goes down, it's being replaced with backup one on the fly. When main database server goes back up, all the data from backup server is uploaded to it. Essentially, I need the hot swapping working automatically with no or minimal user intervention, if possible. Recovery procedure is preferably automatic but can include some manual steps.

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  • CentOS/Apache killing connections

    - by fin1te
    Getting a really strange error. Basically, whenever I browse to my server (http://[ip_address] or http://[hostname]), it doesn't load, and my active SSH connection drops out. I installed CentOS 5.5, and then httpd and PHP 5.3. No other applications where installed, so I can't imagine it's something else causing it. I also reinstalled CentOS 5.5 again, completely fresh, the only thing I did to it was yum install httpd, and it still caused this issue. I've changed nothing in the config or anything else. Driving me mad, has anyone heard of this? It's really frustrating since everytime I attempt to debug this issue, I get kicked off SSH and have to log back in. Theres nothing in the Apache error logs, and nothing in the access log recording my attempt. Also, the result from uname - Linux [hostname] 2.6.35.4-rscloud #8 SMP Mon Sep 20 15:54:33 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux Thank you

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  • Should app config files be in jboss/bin directory?

    - by djangofan
    I am a Integration Engineer for a software company. My development team has generated various jboss .ear applications that rely on configuration files being in the jboss/bin directory and setting the CLASSPATH externally using batch files (on Windows from an external LIB directory) rather than using jboss's internally loaded classes. Is this the right/standard way of doing things? Would some other location be better (for the config files) such as jboss/server/instancename/deploy or some other directory? Any opinons on how I can direct my development team to doing things in a best practices fashion?

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  • iis 7.0 output caching

    - by george9170
    My company is serving up deep-zoom maps. We have 100'000s jpg images being served up and was wondering if output caching would be the way to go. Our problem is latency on serving the images. I was wondering if i output caching would indeed improve latency and a general explanation about output caching. I have visisted http://blogs.iis.net/bills/archive/2007/05/02/iis7-output-caching-for-dynamic-content-dramatically-speed-up-your-asp-and-php-applications.aspx and was wondering if there are any other good sites to look at. thank you very much.

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  • How do I convert an animated GIF to a YouTube friendly video format?

    - by Dave Webb
    My son has made some animations with Pivot Stickfigure Animator which we'd like to upload to YouTube. The problem is Pivot saves as animated GIFs which I can't upload to YouTube. The Wikipedia article recommends using Windows Movie Maker to convert GIF to WMV, but unfortunatley I'm using Window 7 for which you can get the new Windows Live Movie Maker which doesn't seem to support GIFs. I Googled and found an article which said to use Beneton Movie GIF to convert animated GIF to AVI, but this seemed to rely on a 3rd Party application which wasn't installed and so failed. Installing the missing application - pjBmp2Avi - by hand and adding it to the path still didn't allow Beneton to do the conversion. I hoped FFmpeg might do the trick but this only outputs to animated GIFs, it won't read from then. Further Googling found lots of applications with 30 day trials and so on but I was hoping for something free. So any suggestions on how I can convert an animated GIF to a movie file on Windows using free (as in beer) software?

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  • Oracle releases ADF Mobile with Java ME CDC for iOS and Android

    - by hinkmond
    Finally. Oracle has released a new product that I've worked on for a while now. Oracle ADF Mobile is available for iOS and Android bringing Java ME CDC technology to iPhones and Android devices all over the world. Woot! Java. On iPhone and Android. Yeah, it's like that. See: Java and HTML5 on SmartPhones Here's a quote: Oracle announced the availability of Oracle ADF Mobile – a framework the enables the development of hybrid applications for mobile devices. Oracle ADF Mobile uses Java and HTML5 and enables developers to develop a single application that installs and runs on both iOS and Android systems. Java - Application logic is developed with the Java language. Oracle brings a lightweight Java VM embedded with each application so you can develop all your business logic in the platform neutral language you know and love! (Yes, even iOS!) Gosh, you'd think it was a big deal. Well, it was! So, go download yours today! Hinkmond

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  • System boots in console + login loop

    - by Imagicien
    I messed up my system while trying to fix permission problems for setting up a LAMP local server. I tried this solution: How to avoid using sudo when working in /var/www? without success. Then I saw this solution: Permissions issue: how can Apache access files in my Home directory? I understood that I had to change the permissions of my root directory (among others), so I executed: sudo chmod 710 / I also changed the user group on / to www-data. I also did these operations on /home. I'm pretty sure one of those commands broke something, because it's the last commands I executed, and after that, my system showed strange/broken behavior: Firefox stopped showing pages Some icons got replaced by an red X icon (meaning "Icon not found" I guess) Applications refused to launch (no reaction) After rebooting: I got a strange graphical message talking about not being able to mount something, asking me if I wanted to wait, and talking about /tmp (I forgot the message since I was in shock) My system now boots in console, and when I login, it flashes unsignificant stuff* before re-asking me to login. My important data is on Ubuntu One. I'd prefer not having to reinstall from scratch. Is there a way to regain access to my system? Thanks a lot for your help. *Looks like a terminal header with the name of the OS and other info. Doesn't seem important.

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