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• JFXtras Project: More cool features for your JavaFX app

  - by terrencebarr

  JFXtras in an open source project that provides a bunch of interesting components and pieces to make your JavaFX application even more productive, engaging, and, yes, sexy. And saves you coding time along the way. Check out the new JFXtras Ensemble demo, which showcases in one fell swoop all the features and bits you can take advantage of. Also, bookmark Jim Weaver’s excellent blog to keep up with all things JavaFX and rich client. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: JavaFX, JFXtras, Open Source

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• Speaking tomorrow @ JAX, Mainz, Germany

  - by terrencebarr

  Just a quick note: I’ll be speaking at the JAX conference in Mainz, Germany, tomorrow: “JavaFX 2: Java, RIA, Web, and more”, April 17, 18:00 The talk will be giving an overview of JavaFX 2.0, top features, demos, tools, and the roadmap of what’s in store for the technology in 2012 and beyond. Also, be sure to check out the other Oracle sessions: “Java everywhere – The Vision becomes true, again”, Dennis Leung, April 17, 9:00 “Die Oracle-Java-Plattformstrategie zeigt klare Konturen”, Wolfgang Weigend, April 18, 17:30 “Lambdas in Java 8: their Design and Implementation”, Maurizio Cimadamore, April 18, 17:30 “OpenJDK Build Workshop”, Frederik Öhrström, April 18, 20:45 “The Future of Java on Multi-Core, Lambdas, Spliterators and Methods“, Frederik Öhrström, April 19, 10:15 For a complete list of all sessions, see here. Cheers, – Terrence Filed under: Mobile & Embedded Tagged: JavaFX, JAX

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• What is the best way to learn how to develop drivers?

  - by Kenneth

  At some point in my career I would definitely like to get involved in some embedded programming. I was thinking that starting out with developing some drivers would be a good place to develop my abilities in the regard. I'm open to doing so on either windows or linux platform (eventually will want to probably attempt both). What tools would you recommend that I look into to get me started on this project? Any other resources that you have found to be helpful (i.e. books, websites, programs, etc)? Any advice/recommendations? Thanks!

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• Object Oriented programming on 8-bit MCU Case Study

  - by Calvin Grier

  I see that there's a lot of questions related to OO Programming here. I'm actually trying to find a specific resource related to embedded OO approaches for an 8 bit MCU. Several years back (maybe 6) I was looking for material related to Object Oriented programming for resource constrained 8051 microprocessors. I found an article/website with a case history of a design group that used a very small RAM part, and implemented many Object based constructs during their C design and development. I believe it was an 8051. The project was a success, and managed to stay inside the very small ROM/RAM they had available. I'm attempting to find it again, but Google can't locate it. The article was well written, and recommended a "mixed" approach using C methods for inheritance and encapsulation - if I recall correctly. Can anyone help me locate this article?

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• SceneManagers as systems in entity system or as a core class used by a system?

  - by Hatoru Hansou

  It seems entity systems are really popular here. Links posted by other users convinced me of the power of such system and I decided to try it. (Well, that and my original code getting messy) In my project, I originally had a SceneManager class that maintained needed logic and structures to organize the scene (QuadTree, 2D game). Before rendering I call selectRect() and pass the x,y of the camera and the width and height of the screen and then obtain a minimized list containing only visible entities ordered from back to front. Now with Systems, originally in my first attempt my Render system required to get added all entities it should handle. This may sound like the correct approach but I realized this was not efficient. Trying to optimize It I reused the SceneManager class internally in the Renderer system, but then I realized I needed methods such as selectRect() in others systems too (AI principally) and make the SceneManager accessible globally again. Currently I converted SceneManager to a system, and ended up with the following interface (only relevant methods): /// Base system interface class System { public: virtual void tick (double delta_time) = 0; // (methods to add and remove entities) }; typedef std::vector<Entity*> EntitiesVector; /// Specialized system interface to allow query the scene class SceneManager: public System { public: virtual EntitiesVector& cull () = 0; /// Sets the entity to be used as the camera and replaces previous ones. virtual void setCamera (Entity* entity) = 0; }; class SceneRenderer // Not a system { vitual void render (EntitiesVector& entities) = 0; }; Also I could not guess how to convert renderers to systems. My game separates logic updates from screen updates, my main class have a tick() method and a render() method that may not be called the same times. In my first attempt renderers were systems but they was saved in a separated manager, updated only in render() and not in tick() like all other systems. I realized that was silly and simply created a SceneRenderer interface and give up about converting them to systems, but that may be for another question. Then... something does not feel right, isn't it? If I understood correctly a system should not depend on another or even count with another system exposing an specific interface. Each system should care only about its entities, or nodes (as optimization, so they have direct references to relevant components without having to constantly call the component() or getComponent() method of the entity).

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• ARM TechCON 2013 presentation: Java SE 8 Compact Profiles

  - by hinkmond

  I'll be giving a technical session presentation at ARM TechCON 2013 this Wed. 10/30 @ 11:30am. So if you are in Santa Clara, Calif. come over to the conference and hear me present on this fun-filled topic! See: Java SE 8 Compact Profiles Here's a quote: Java SE 8 has a new Compact Profiles feature that allows for three new specification–compliant subsets of Java SE 8 APIs. Compact Profiles will enable the creation of Java SE 8 runtimes that support configurations that previously were possible only with the CDC version of J2ME... It's an important topic in today's mad, mad world of Embedded Development. You never want to develop in Java for small devices with your Compact Profiles. It's just not what you'd want! Hinkmond

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• 0.00006103515625 GB of RAM. Is .NET MicroFramework part of Windows CE?

  - by Rocket Surgeon

  The .NET MicroFramework claims to work on 64K RAM and has list of compatible targets vendors. At the same time, same vendors who ship hardware and create Board Support Packages (vendors like Adeneo) keep releasing something named Windows 7 CE BSP for the same hardware targets. Obviously the OS as heavy as WinCE needs more than 64K RAM. So, somehow .NET MicroFramework is relevant to WinCE, but how ? Is it part of bigger OS or is it base of it, or are both mutually exclusive ? Background: 0.00006103515625 GByte of RAM is same as 64Kbyte of RAM. I am looking for possiblity to use Microsoft development tools for small target like BeagleBone. http://www.adeneo-embedded.com/About-Us/News/Release-of-TI-BeagleBone Nice. Now .. where is a MicroFramework for the same beaglebone ? Is it inside the released pile ?

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• On-demand Webcast: Java in the Smart Grid

  - by Jacob Lehrbaum

  The Smart Grid is one of the most significant evolutions of our utility infrastructure in recent history. This innovative grid will soon revolutionize how utilities manage and control the energy in our homes--helping utilities reduce energy usage during peak hours, improve overall energy efficiency, and lower your energy bills. If you'd like to learn more about the Smart Grid and the role that Java is poised to play in this important initiative you can check out our on-demand webcast. We'll show you how Java solutions--including Java ME and Java SE for Embedded --can help build devices and infrastructure that take advantage of this new market. As the world's most popular developer language, Java enables you to work with a wide range of developers and provides access to tools and resources to build smarter devices, faster and more affordably.

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• How can I install an old version of libc on 12.04 and is it safe to do so?

  - by mathematician1975

  I am building an application on 12.04 and I need to run it on an embedded device. The device has libc-2.8.90.so on it and my dev machine has libc-2.15.so on it. I would like to install libc-2.8.90 onto my dev machine and attempt to link it to my application. I have searched at the Ubuntu software centre for libc-2.8.90 but I cannot find anything resembling it. Is there a way to install this on my machine from command line?? Also will my system be safe having 2 installed versions of libc at the same time? Can it lead to any instability?

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• Preventing Windows version of Vim from destroying other file systems permissions

  - by dborba

  I am currently using the windows version of gVim to edit source files on a networked drive mapped to a linux system, as well as local files created in cygwin. The problem is that the windows version of gVim destroys the original file permissions on the respective systems. IE: Files on cygwin are defaulted to 077. When edited by the windows version of vim they are saved as 777.This problem doesn't even occur when using ms-notepad (as well as all other editors I've tried), so I am not quite sure why gVim does it. A possible solution would be to use cygwin's gVim for everything, but that's rather cumbersome as it requires running an x11 environment to support it, and it causes some problems when running some commands from within gVim (or vim for that matter) when working on the networked drive. Any ideas how I might be able to maintain the existing file permissions? Edit: This morning while on a different machine the problem with cygwin did not occur. Cygwin & gVim were the same version, however the other machine is running WinXP while the machine the problem is occurring on runs Win7.

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• Strange difference in bash behavior across systems

  - by pinkie_d_pie_0228

  I have two systems, an Ubuntu computer and an Android tablet. I have built and configured bash for Android to be used in adb, so it's the same version as my Ubuntu bash, and they use mostly the same bashrc and configuration, and the same exact options set by shopt. However, there is a slight difference in that the Android bash behaves as I expect when I I try to tab-complete something using a variable in it, but the Ubuntu bash doesn't. #Android ls $HOME/loc<tab> => ls $HOME/local #As expected Basically, the variable is taken into account when completing. But then #Ubuntu ls $HOME/loc<tab> => ls \$HOME/loc #Undesired behavior. The list of options is as follows, and is the same in both builds of bash. autocd:checkwinsize:cmdhist:expand_aliases:extglob:extquote:force_fignore:histappend:interactive_comments:progcomp:promptvars:sourcepath What can be making the Ubuntu version escape the $ instead of using it for completion as in the Android build? What can I do to make both work the same way? Any help will be greatly appreciated.

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• Monitoring AWS Systems Behind ElasticBeanStalk

  - by A. Avadis

  So I'm getting a company set up in the Amazon Cloud -- creating IAAS protocol/solutions/standardized implementation, etc while also being the SysAdmin for individual systems, app environments, and day-to-day uptime. One of the biggest issues I'm having is tracking various system/application logs, as well as logging/monitoring/archiving system metrics like memory usage, cpu usage, etc etc In a centralized fashion. E.g. -- Nagios + Urchin. The BIGGEST impediment to my endeavors is the following: The company application is deployed in the form of a Java *.WAR file, uploaded to an Elastic BeanStalk application environment, load balancing and auto-scaling between 3(min) and 10(max) servers, and the EC2's that run the application are fired up and disposed of ad-hoc. That is to say, I can't monitor the individual EC2's for very long because so many are being terminated then auto-provisioned/auto-scaled on the fly -- so I'd constantly be having to "monitor what I'm monitoring", and continuously remove/add EC2 machine addresses to my monitoring lists. IS there some sort of way to use monitoring tools like Zabbix or Nagios to monitor the ElasticBeanStalk, and have it automatically add on new EC2's, and remove terminated/failed EC2's from its monitoring list automatically? Furthermore, is there anything I can do with GrayLog to achieve similar results with the aggregation/centralization of my application logs from multiple EC2 instances into ONE consolidated set of logs/events? If not GrayLog, is there ANYTHING LIKE GrayLog that can automatically detect what EC2 members are being added/removed from the environment, and collect the logs from them automatically? Any and all advice or direction is appreciated. Thanks much, and cheers!!

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• Patch management on multiple systems

  - by Pierre

  I'm in charge of auditing the security configuration of an important farm of Unix servers. So far, I came up with a way to assess the basic configuration but not the installed updates. The very problem here is that I just can't trust the package management tools on those machine. Indeed some of them did not sync with the repository for a long time (So I can't do a "yum check-updates" on Redhat for example). Some of those servers are not even connected to the internet and use an company repository. Another problem is that I have multiple target systems: AIX, Debian, Centos/Redhat, etc... So the version could be different (AIX) and the tools available will be different. And, last but not least, I can't install anything on the target system. So I need to use a script to retrieve the information and either: process it directly or save the information to be able to process it later on a server (Which may happen to run a different distribution than the one on which the information have been retrieved). The best ideas I could come up with were: either retrieve the list of installed packages on the machine (dpkg -l for example on debian) and process it on a dedicated server (Directly parsing the "Packages" file of debian repositories). Still, the problem remains the same for AIX and Redhat... or use Nessus' scripts to assess vulnerability on the installed packages, but I find this a bit dirty. Does anyone know any better/efficient way of doing this ? P.S: I already took time to review some answers to similar problems. Unfortunately Chef, puppet, ... don't meet the requirements I have to meet. Edit: Long story short. I need to have the list of missing updates on a Unix system just like MBSA on Windows. I'm not authorized to install anything on this system as it's not mine. All I have are scripts languages. Thanks.

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• Host system resets (crashes) when using VMWare or VirtualBox and 64-bit guest systems

  - by sinni800

  I have been trying to install virtual systems on VMWare for a while now and encountered strange behaviour from my PC. The behaviour is as follows: On "automatic" virtualization mode it either outputs a cryptic error message (can MAYBE give later, if I can reproduce) right on startup (before even the BIOS) or it resets the complete HOST system (blackscreen, bios...) If I install a Windows XP on it it works well on "binary translation" mode. If I try installing Linux on it, in "binary translation" mode it crashes 1 or 2 seconds after I hit enter on the GRUB selection screen (after the first page of kernel messages rolled in) Using VirtualBox it crashes right in the BIOS. It gave me a Bluescreen though! 0x00000101: CLOCK_WATCHDOG_TIMEOUT: a clock interrupt was not received on a secondary processor within the allocated time interval NEWS: I tried VirtualBox again and it did not completely crash the computer this time. It gave me a critical error and a log file: http://pastebin.com/yKZSDs91 In conclusion, it will crash instantly if VT-x is activated. If not, it seemingly only crashed if I try to install something with 64 bits. Another update: Yes, it ONLY crashes when the guest is 64 bit! What I tried: Reinstalling Windows (my Windows installation was quite broken so it seemed natural. Didn't work though.) New BIOS What I am certain of: Virtualization extensions are activated in the BIOS What my computer specs are: ASUS P8P67 LE mainboard, newest BIOS/EFI firmware Intel Core i5 2500k Ati Radeon HD 5770 16 GB Corsair 1333mhz DDR3 RAM, 4 X 4 GB

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• Flash/Flex: play embedded AAC audio?

  - by aaaidan

  I'm pretty sure of the answer, but just wanted to check with you all. Is it possible to play an embedded AAC file in Flash/Flex somehow? I know you can playback embedded MP3 files, but I hear that you can't do that with AAC. Anyone know any sneaky ways to get around this? By way of illustration, here's come code. [Embed(source='../../audio/music02.m4a', mimeType="audio/aac")] private static const __ExampleMp4File:Class; public var myMp4Sound:Sound = new __ExampleMp4File(); public function EmbeddedAudioTest() { myMp4Sound.play(); }

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• Running a Java daemon with a GWT front-end served by embedded Jetty

  - by BinaryMuse

  Greetings, coders, Background Info and Code I am trying to create a daemon-type program (e.g., it runs constantly, polling for things to do) that is managed by a GWT application (servlets in a WAR) which is in turn served by an embedded Jetty server (using a WebAppContext). I'm having problems making the GWT application aware of the daemon object. For testing things, I currently have two projects: The daemon and embedded Jetty server in one (EmbJetTest), and the GWT application in another (DefaultApp). This is the current state of the code: First, EmbJetTest creates an embedded Jetty server like so, using a ServletContextListener to inject the daemon object into the web application context: EmbJetTest.server = new Server(8080); // Create and start the daemon Daemon daemon = new Daemon(); Thread thread = new Thread(daemon); thread.start(); // war handler WebAppContext waContext = new WebAppContext(); waContext.setContextPath("/webapp"); waContext.setWar("./apps/DefaultApp.war"); waContext.addEventListener(new DaemonLoader(daemon)); // Add it to the server EmbJetTest.server.setHandler(waContext); EmbJetTest.server.setThreadPool(new QueuedThreadPool(10)); // Start the server; join() blocks until we shut down EmbJetTest.server.start(); EmbJetTest.server.join(); // Stop the daemon thread daemon.stopLoop(); Daemon is a very simple object with a couple properties, at the moment. DaemonLoader is the following ServletContextListener implementation: private Daemon daemon; public DaemonLoader(Daemon daemon) { this.daemon = daemon; } @Override public void contextDestroyed(ServletContextEvent arg0) { } @Override public void contextInitialized(ServletContextEvent arg0) { arg0.getServletContext().setAttribute("daemon", this.daemon); } Then, in one of my servlets in the GWT application, I have the following code: Daemon daemon = (Daemon) this.getServletContext().getAttribute("daemon"); However, when I visit localhost:8080/webapp/* and invoke the servlet, this code throws a ClassCastException, even though the classes are of the same type. This StackOverflow answer indicates that this is because the two classes are loaded with different classloaders. Question My question is twofold. Am I even on the right track here? Am I going about this completely the wrong way? Something tells me I am, but I can't think of another way to make the daemon available to both applications. Is there a better way to communicate with the daemon from the GWT application? Should the GWT app own the daemon and somehow start the daemon itself? The daemon needs to run even if no one visits the one of the GWT app's servlets--how could I do this? If I am on the right track, how can I get around the classloader issue? Thanks in advance.

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• How to retrieve path for a file embedded in Resources (Resource Manager) - .net C#

  - by curiousone

  Hi, I am trying to retrieve file path for a html file that is embedded in resource (resx file) in VS2008 C# project. I want to give path of this file to native webbrowser control (PIEHtml) to be able to navigate (DTM_NAVIGATE) in my application. I know I can pass the string to this control using DTM_ADDTEXTW but since html text size is so big, I dont want to pass string to the control. I need to somehow extract the file path for this html file embedded inside resource manager. I tried using but this does not give the file path of html inside assembly: private ResourceManager resManager = new ResourceManager("AppName.FolderName.FileName", System.Reflection.Assembly.GetExecutingAssembly()); this.lbl.Text = resManager.GetString("StringInResources"); and also read Retrieving Resources in Satellite Assemblies but it did not solve my problem. Can somebody please provide info as to how to achieve this ? thanks,

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• accessing embedded object with jquery not working in firefox 3.6

  - by taber

  Hi, this code in my plugin used to work just fine: jQuery('#embedded_obj', context).get(0).getVersion(); and in html... <object id="embedded_obj" type="application/x-versionchecker-1.0.0.1"</object Basically trying to get the properties from an embedded object. But it looks like get(0) is returning an html object instead of the actual embedded object. For example, if I do: var launcher = jQuery('#embedded_obj', context).get(0); for(prop in launcher){ alert(prop + ': ' + launcher[prop]); } ... it alerts things like "getElementByNode," "scrollWidth," "clientLeft," "clientTop" etc. Again this worked before Firefox 3.6. Has anyone else seen this or have any ideas/suggestions? Thanks!

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• Choosing embedded EJB 3.x container to run JEE 5 app on Tomcat

  - by grigory

  I am sorry in advance if my question sounds too generic - I am doing all preliminary research myself but nothing substitutes real experience... My goal is to port a legacy JEE application (pre-EJB 3.x) to Tomcat with embedded EJB container. My choices currently stand as follows: JBoss Embeddable EJB Apache OpenEJB OW2 Consortium EasyBeans anything else? I am expecting to use JMS (with MDBs), Session beans (stateful and stateless), JPA and I am really excited about using JSF with Seam. Now, given choices above, are there any advantages in using one or another embedded EJB provider?

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• Embedded web server and gui framework for .NET applications

  - by Toad

  Hi, I'm looking for a framework which allows me to manage my application through a webbased GUI (using an embedded webserver) instead of winforms. Something like this: http://www.webtoolkit.eu/wt but then for .NET In my code I should be able to instantiate classes (like buttons, forms etc), and when a user browses to a given port, the app should render it as javascript/ajax etc etc. preferably, when buttons are pushed, a notification in my code should be called. this is a less specific question than another one I posted about extjs. I hope this will attract more viewers since it is more generic Thanks. Update: cassini like solutions don't fit the bill. Since the webbrowser is embedded in my application, there is no need for ASP.NET server side scripts. I would rather have the framework, call functions inside my application when things happen on the page. onButtonClicked() for instance.

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• Best Book on Operating Systems

  - by qp

  What is the best, up-to-date and comprehensive book on operating systems? Voice your opinion. I have seen recommendations for Tanenbaum's Modern Operating Systems but the reviews saying the latest edition has many conceptual errors and numerous typos make me worry.

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• WeakReferences are not freed in embedded OS

  - by Carsten König

  I've got a strange behavior here: I get a massive memory leak in production running a WPF application that runs on a DLOG-Terminal (Windows Embedded Standard SP1) that behaves perfectly fine if I run it localy on a normal desktop (Win7 prof.) After many unsucessful attempts to find any problem I put one of those directly beside my monitor, installed the ANTs MemoryProfiler and did one hour test run simulating user operations on both the terminal and my development PC. Result is, that due to some strange reasons the embedded system piles up a huge amount of WeakReference and EffectiveValueEntry[] Objects. Here are are some pictures: Development (PC): And the terminal: Just look at the class list... Has anyone seen something like this before and are there known solutions to this? Where can I get help? (PS the terminals where installed with images prepared for .net4)

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• WIndows xp embedded file-based write filter

  - by Nima Rikhtegar

  does any body know any .net wrapper class for windows xp embedded file-based write filter (FBWF)?

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• MongoDB efficient dealing with embedded documents

  - by Sebastian Nowak

  I have serious trouble finding anything useful in Mongo documentation about dealing with embedded documents. Let's say I have a following schema: { _id: ObjectId, ... data: [ { _childId: ObjectId // let's use custom name so we can distinguish them ... } ] } What's the most efficient way to remove everything inside data for particular _id? What's the most efficient way to remove embedded document with particular _childId inside given _id? What's the performance here, can _childId be indexed in order to achieve logarithmic (or similar) complexity instead of linear lookup? If so, how? What's the most efficient way to insert a lot of (let's say a 1000) documents into data for given _id? And like above, can we get O(n log n) or similar complexity with proper indexing? What's the most efficient way to get the count of documents inside data for given _id?

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• Embedded Record is not getting loaded in Ember.js

  - by Venky

  Following is the JSON data I am trying to load using ember-data: { "product" : [ { "id" : 1, "name" : "product1", "master" : { "id" : 1, "name" : "product1", "images" : [ { "id" : 1, "productUrl" : "/images/product1_1.jpg" }, { "id" : 2, "productUrl" : "/images/product1_2.jpg" } ] } }, { "id" : 2, "name" : "product2", "master" : { "id" : 2, "name" : "product2", "images" : [ { "id" : 3, "productUrl" : "/images/product2_1.jpg" }, { "id" : 4, "productUrl" : "/images/product2_2.jpg" } ] } } ] } The models are as follows: App.Product = DS.Model.extend name: DS.attr('string') description: DS.attr('string') master: DS.belongsTo('master') App.Master = DS.Model.extend images: DS.hasMany('image') App.Image = DS.Model.extend productUrl: DS.attr('string') The Application Serializer code is as follows: App.ApplicationSerializer = DS.ActiveModelSerializer.extend(DS.EmbeddedRecordsMixin, attrs: { images: { embedded : 'always' } master: { embedded : 'always' } } ) The problem is that the "master" model records are being returned empty. I am not sure, where I am going wrong. I am using the following platform configuration: ember-source (1.4.0) ember-data-source (1.0.0.beta.7) ember-rails (0.15.0) Rails (4.1.0) Thanks

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