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• 7-minute Community GlassFish Clustering Screencast

  - by alexismp

  Community member Faissal has recently put up a 7-minute screencast of an un-edited setup of a GlassFish cluster. His clustering setup spans across a mac and a virtualized Ubuntu host. It can probably be further simplified using the SSH provisioning feature (asadmin install-node) to avoid logging into remote machines. You may remember John's GlassFish clustering in under 10 minutes, a very successful video which was based on version 2. Since that we've put out a number of demos on YouTube for our 3.1.x versions including a full webinar replay.

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• Getting My Head Around Immutability

  - by Michael Mangold

  I'm new to object-oriented programming, and one concept that has been taking me a while to grasp is immutability. I think the light bulb went off last night but I want to verify: When I come across statements that an immutable object cannot be changed, I'm puzzled because I can, for instance, do the following: NSString *myName = @"Bob"; myName = @"Mike"; There, I just changed myName, of immutable type NSString. My problem is that the word, "object" can refer to the physical object in memory, or the abstraction, "myName." The former definition applies to the concept of immutability. As for the variable, a more clear (to me) definition of immutability is that the value of an immutable object can only be changed by also changing its location in memory, i.e. its reference (also known as its pointer). Is this correct, or am I still lost in the woods?

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• The Top 5 Business Challenges in Financial Services. Oracle Process Accelerators as a Solution By Lance Shaw

  - by JuergenKress

  Here at Oracle, we continue to release Process Accelerators for additional solutions.  These Accelerators help achieve process excellence faster with end-to-end implementations of common business processes.  They are Ready-to-use and extensible, and include industry specific best practices. One common industry where Process Accelerators are used to speed the delivery of business process management solutions is Financial Services.  We've recently produced a whitepaper that identifies the top five business challenges in the financial services industry and outlines how adopting Oracle Process Accelerators can give a competitive edge. To get the whitepaper please visit our website. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Technorati Tags: financial services,process accelerators,Lance Shaw,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• Problem installing Oracle 10g Express edition

  - by abhi

  I have installed Oracle 10g Express edition in Ubuntu 10.10 and it doesn't show or ask to give my password during installation. When I click on "start database" it gave the warning "Operation failed, abhi is not a member of 'dba' group." and when clink on "Run SQL command line" it shows /usr/lib/oracle/xe/app/oracle/product/10.2.0/server/bin/nls_lang.sh: 114: [[: not found When I click on "GOTO Database home page", it opens Mozilla's "Ubuntu Google search page". Can anyone help me get my Oracle to work or tell me how to remove that because it is also not getting removed. I tried all the commands that are given as suggestions by Ubuntu. Please help me because I don't want to format my Ubuntu.

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• Java Developers: Open-source Modules, Great Tools, Opportunity.

  - by Paul Sorensen

  The role of Java developer may just be better than ever. An excellent article in Java Magazine discusses the availability of web-based tools that help development teams more effectively manage their projects and modules. If you are a Java developer you should definitely read this article. I especially like the Expert Opinions scattered throughout the article. These highlight real-world usage of the latest and greatest development tools.  As you consider steps to move your career forward, consider Java certification. Oracle has over 15 unique Java certification credentials available. The process of becoming certified in Java and preparing for your exams will require you to study, learn and practice (code). All of this activity will help you sharpen your skills and increase your working knowledge of Java - making you a better developer and more valuable member of your team. You can use the Certification Finder on the Oracle certification homepage to find a Java certification that is right for you. Thanks! 

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• Skeletal Animation - Automatically apply skeleton to model

  - by Randomman159

  Looking at websites such as mixamo.com or some game's development systems such as the animation editor for Overgrowth (http://www.youtube.com/watch?v=-RpqbC5-Z0E), i see that the skeleton in these situations is automatically being applied to the models. I really don't expect (though wouldn't mind) code that does this, but i really am looking for some sort of pointer in the direction, or how they go about this. If any of you have done this, or know how to, please do reply, i don't want to spend the next week trying to crack it, then another to actually code it :P Thanks all :) Just for a bit more information, i am in C# working with OpenTK with my own custom model loader, etc. but i can easily adjust any given code / concept to fit with mine :)

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• Is it good practice to use functions just to centralize common code?

  - by EpsilonVector

  I run across this problem a lot. For example, I currently write a read function and a write function, and they both check if buf is a NULL pointer and that the mode variable is within certain boundaries. This is code duplication. This can be solved by moving it into its own function. But should I? This will be a pretty anemic function (doesn't do much), rather localized (so not general purpose), and doesn't stand well on its own (can't figure out what you need it for unless you see where it is used). Another option is to use a macro, but I want to talk about functions in this post. So, should you use a function for something like this? What are the pros and cons?

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• Design patterns for effects between actors and technology

  - by changelog

  I'm working on my first game, and taking the opportunity to brush up my C++ (I want to make as much of it as portable as I can.) Whilst working on the technology tree and how it affects actors (spaceships, planets, crew, buildings, etc) I can't find a pattern that decouples these entities enough to feel like a clean approach. Just as an idea, here's the type of effects these actors can have on one another (and techs too) An engineer inside a spaceship boosts its shield A hero in a spaceship in a fleet increases morale A technology improves spaceships' travel distance A building in a planet improves its production The best I can come up with is the Observer pattern, and basically manage it more or less manually (when a crew member enters a spaceship, fire the event; when a new building is built in a planet, fire the event, etc etc.) but it seems to be too tightly coupled to me. I would love to get some ideas about how to approach this better.

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• No windows whatsoever after compiz reset

  - by Shashank Singh

  Currently using 12.04. This time I was trying to use the application switcher, and it asked me to resolve a few conflicts most of which were not easy to comprehend. So after some yes and no dialogue boxes leading me nowhere, I thought a reset should set things fine. However, after preferences-reset to default, I can't see any window!! NONE whatsoever except the log out one when I press ctrl+alt+del All I can see is the wallpaper and the mouse pointer. I cant even see the terminal or anything when I press alt+f2. I am posting this when I switch to ubuntu 2d (I cant make out the difference between the two, but this just works for now almost the same way)

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• Session Mania: Content Catalog & Suggest-a-Session

  - by Justin Kestelyn

  As ably reported in the Oracle Technology Network blog, the Oracle Develop Conference's content catalog is now public (as are the catalogs for JavaOne and Oracle OpenWorld), meaning you can now explore technical sessions scheduled for the conf to your heart's content."But something's missing", you may tell yourself. "Where is my favorite subject, the one I happen to also be an expert on?" Well, there's good news for you, too: The Suggest-A-Session project has returned. It works thus: Submit a session idea via Oracle Mix and ask your colleagues, Oracle Mix community, friends and anyone else you know to vote for your session. (You must be an Oracle Mix member to vote.) Voting is open through June 20. For the most part, the top voted sessions will be selected for the Oracle Develop Conf (or Oracle OpenWorld) official agenda. See the FAQ for fine print.Apparently some people have already jumped into this loophole, including Oracle ACE Director Marco Gralike, who has "gone video" on us: Why wait? Suggest-a-session!

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• Role of an entity state in a component based system?

  - by Paul

  Component-based entity systems are all the rage these days; everyone seems to agree they are the way to go, but no one really has a definitive implementation of such a system. I was wondering, what role do entity states (walking-left, standing, jumping, etc) have in a CBS? Do they act like controllers (i.e. they handle events and change the entity's attributes based on those events)? What about cases where a state would, for example, require that the entity enters no-clip mode? Should, that state, when it enters, maybe set the CollisionComponent of the entity to a null pointer or something? (Then, on exit, the state should restore the entity's CollisionComponent to its previous state.) Also, I guess it's the current state's job to change the entity's state to something else, right?

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• Fusion Middleware Sales Plays 2014

  - by JuergenKress

  Please invite your sales persons and pre-sales persons to watch this short Oracle Fusion Middleware Sales Play overview webcast. Ed Zou, Vice President product management gives insights what and how to position the Oracle middleware solutions including customer examples. Watch the webcast here. At our WebLogic Community Workspace (WebLogic Community membership required) you can find the sales kits for: WebLogic 12c FY15 sales resources and Mobile Platform 12c FY15 sales resources. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: sales,Ed Zou,education,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Functions returning pointers

  - by fg nu

  C++ noob here. I have a very basic question about a construct I found in the C++ book I am reading. // class declaration class CStr { char sData[256]; public: char* get(void); }; // implementation of the function char* CStr::get(void) { return sData; } So the Cstr::get function is obviously meant to return a character pointer, but the function is passing what looks like the value (return sData). Does C++ know to return the address of the returned object? My guess would have been that the function definition would be return &sData.

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• "Google a raté le coche avec Chrome OS" affirment certains experts qui s'inquiètent des retards pris par le système d'exploitation

  "Google a raté le coche avec Chrome OS", affirment certains experts qui s'inquiètent des retards pris par système d'exploitation de Google Chrome OS aurait du voir le jour en 2010. Et pourtant, personne encore ne l'a vu pointer le bout de son nez. Du coup, certains experts s'inquiètent. Pour eux, le marché change vite, trop vite. Chrome OS est destiné a équiper les appareils de puissance moindre, comme les netbooks et les ordinateurs lowcost. Seulement : "il y a un an, personne n'aurait pu prédire les grands changements qui sont survenus". Ce que les analystes veulent dire, c'est qu'au moment où Google à annoncé son produit, les netbooks avaient le vent en poupe. Aujourd'hui, ils so...

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• Is there a real name policy in the Ubuntu community?

  - by martin001

  I'm not ashamed to be a part of Ubuntu, but I'm trying to keep the number of web search hits for my real name low, which is kinda impossible if you use a Launchpad account. So, I'm wondering if there is a real name policy in the Ubuntu community, or if it's okay to use a pseudonym/nick name/fake name? While it might be okay to use nick names on IRC and in forums, how about these topics: Adding an OpenPGP key to Launchpad. Signing the Ubuntu Code of Conduct. Becoming an Ubuntu member. Code contributions (e.g., signing the Canonical CLA). Thanks in advance for your answers!

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• iAs to WebLogic upgrade marketing campaign

  - by JuergenKress

  We are very interested to roll out our marketing campaign to additional countries. You can find the updated marketing kit, now including a demo at our WebLogic Community Workspace (WebLogic Community membership required) As an great example please see the C2B2 Youtube video If you are interested to run this campaign in your country please contact your local Oracle A&C partner manager or marketing manager or myself Jürgen Kress. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: ias to WebLogic,WebLogic basic,ias upgrade,C2B2,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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• The Road to New Orleans: IT Grand Prix

  - by Enrique Lima

  Four teams race for charity. They need your help. Four teams of MCPs are racing to TechEd in New Orleans on a quest to win $10,000 for the charity of their choice. But they can't win without your help--pick a team, join their pit crew, and earn them points toward victory! While they're on the ground, they need your help in the cloud--pick a team, join their virtual pit crew, and earn them points by meeting online challenges. Join us, be part of this amazing drive to raise awareness and help out by becoming part of the virtual pit crew. I am a pit crew member for the Gold Team.

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• Why do some opensouce libraries lack comments?

  - by entropy

  I don't know if this happens to most Opensource libraries, but many of I know and use (for example OpenSSL, Webkit, ...) they all lack comments, or contain very few comments. Not to mention their very few documents, it is hard to read their source code. We can hardly understand what a member variable means, or what this function does. This seems to be against coding standard practice Why is that? How can people collaborate to these opensource with very few comments?

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• How do I draw video frames onto the screen permanently using XNA?

  - by izb

  I have an app that plays back a video and draws the video onto the screen at a moving position. When I run the app, the video moves around the screen as it plays. Here is my Draw method... protected override void Draw(GameTime gameTime) { Texture2D videoTexture = null; if (player.State != MediaState.Stopped) videoTexture = player.GetTexture(); if (videoTexture != null) { spriteBatch.Begin(); spriteBatch.Draw( videoTexture, new Rectangle(x++, 0, 400, 300), /* Where X is a class member */ Color.White); spriteBatch.End(); } base.Draw(gameTime); } The video moves horizontally acros the screen. This is not exactly as I expected since I have no lines of code that clear the screen. My question is why does it not leave a trail behind? Also, how would I make it leave a trail behind?

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• How should a site respond to automated login attempts with phony usernames?

  - by qntmfred

  For the last couple weeks I've been seeing a consistent stream of 15-30 invalid login attempts per hours on my site. Many of them are non-sensical usernames that nobody would ever register for real, and often contain typical spam-related keywords. They all come from different IP addresses so I can't just IP block/throttle the requests. I'm not worried about unauthorized access to real accounts since they aren't using real usernames. And if it were a member of my site trying to brute force logins, they could easily scrape the valid usernames from the site, so I'm not worried about that kind of malicious behavior either. But what's the point of this type of activity? What would whichever bot operator is doing this have to gain by attempting all these logins?

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• What is the best C++ interview question?

  - by David Thielen

  If you could ask a C++ programmer one question to measure their C++ skills, what would it be? The question I think is best is: Can you call "delete this;" inside a member function? (I put this as a link so you can think it through first, then go to The Best C++ Interview Question – Ever! to see the correct answer.) I don't ask this because I expect most people to know the answer. If they did it would not be that useful a question. I ask to see if they can work their way to the correct answer and how they do so.

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• What's a viable way to get public properties from child objects?

  - by Raven Dreamer

  I have a GameObject (RoomOrganizer in the picture below) with a "RoomManager" script, and one or more child objects, each with a 'HasParallelagram' component attached, likeso: I've also got the following in the aforementioned "RoomManager" void Awake () { Rect tempRect; HasParallelogram tempsc; foreach (Transform child in transform) { try { tempsc = child.GetComponent<HasParallelogram>(); tempRect = tempsc.myRect; blockedZoneList.Add(new Parallelogram(tempRect)); Debug.Log(tempRect.ToString()); } catch( System.NullReferenceException) { Debug.Log("Null Reference Caught"); } } } Unfortunately, attempting to assign tempRect = tempsc.myRect causes a null pointer at run time. Am I missing some crucial step? HasParallelgram is an empty script with a public Rect set in the editor and nothing else. What's the proper way to get a child's component?

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• Group method parameter or individual parameter?

  - by Nassign

  I would like to ask on method parameters design consideration. I am usually deciding between using individual variables as parameters versus grouping them to a class or dictionary as one parameter. Is there such a rule when you should use individual parameter against using a class or a dictionary to group the parameter? Individual parameter - Straight forward, strongly typed Dictionary parameter - Very extensible, like HTTP request but cannot be strongly typed. Class parameter - Extensible by adding member to the class parameter, strongly typed. I am looking for a design reference on when to use which? Note: I am not sure if this question is valid in programmers but I definitely think it would be closed in stackoverflow, If it is still not valid, please point me to the proper page.

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• Having a generic data type for a database table column, is it "good" practice?

  - by Yanick Rochon

  I'm working on a PHP project where some object (class member) may contain different data type. For example : class Property { private $_id; // (PK) private $_ref_id; // the object reference id (FK) private $_name; // the name of the property private $_type; // 'string', 'int', 'float(n,m)', 'datetime', etc. private $_data; // ... // ..snip.. public getters/setters } Now, I need to perform some persistence on these objects. Some properties may be a text data type, but nothing bigger than what a varchar may hold. Also, later on, I need to be able to perform searches and sorting. Is it a good practice to use a single database table for this (ie. is there a non negligible performance impact)? If it's "acceptable", then what could be the data type for the data column?

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• Decrease mouse sensitivity below the standard limit.

  - by Bruce Connor

  I've got a USB mouse attached to my Ubuntu notebook. This mouse is (unfortunately) really sensitive, and so it sometimes gets hard to hit small icons with the mouse pointer. This is really a hardware issue, it's not a bug and it's not Ubuntu's/gnome's fault. Still, I would very much like to this issue through software (solving through hardware would imply buying a new mouse). Back in Windows, if I set the sensitivity as really low it was comfortable enough. In Ubuntu, even the lowest sensitivity and acceleration available (in the SystemPrerencesMouse menu) is still frustrating. How can I decrease it below the default minimum? I tried xset, but it seems xset only deals with acceleration and threshold, but not actual sensitivity.

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