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• Today in the OTN Lounge (Tuesday October 2, 2012)

  - by Bob Rhubart

  Here's a quick rundown of today's activities in the OTN Lounge:   (OTN Lounge hours today: 8:00 am - 7:00 pm) 9:00 am - 1:00 pm RAC Attack Learn about Oracle Real Application Clustering (RAC) in this collaborative event. You'll work with experts from the IOUG RAC SIG to get an Oracle Database 11gR2 RAC cluster running inside a virtual machine. For more information: RAC attack at Oracle Open World (Pythian Blog) RAC Attack - Oracle Cluster Database at Home/Events (WikiBooks) 4:30 pm - 8:00 pm Oracle Social Network Developer Challenge Office Hours Find information, expertise, and a collaborative work environment for those participating in the OSN Developer Challenge. Click here for more information. 4:30 pm - 6:00 pm Oracle Database / Oracle Fusion Middleware Tweet Meet Free as in beer! Oracle Database and Oracle Fusion Middleware tweeters, gather in the OTN Lounge for refreshments and conversation with fellow tweeters and Oracle Database and Middleware experts. The OTN Lounge is located in the Howard St. Tent, between 3rd and 4th, directly between Moscone North and Moscone South. Access to the OTN Lounge requires an Oracle OpenWorld or JavaOne conference badge.

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• I'm a student learning C++ and I've recently found out about Ruby. Would learning (some of) Ruby help me with C++ or would it just confuse me?

  - by Von32

  Hi! As the title says, I'm a student that will be starting my second year of C++ very soon. I've discovered Ruby, however. While I've heard much buzz about the language before, I've disregarded it because I always thought it wasn't something that would be useful. However, I've found a number of FANTASTIC tutorials on ruby and am interested in learning it (probably because it seems so straightforward). Would playing around with ruby be a good or bad idea? I understand that there's not such thing as bad knowledge, but I'm afraid that Ruby will only confuse me when dealing with C++. How different from C++ is it? I've read it's based on C in some way, but my google-fu seems to be horrible today. How useful is Ruby in the real world? I'm not specifically asking about jobs- I'm more interested in what sort of applications may come from this language. Any specific examples worth looking at? Going back to Question two- I've read some posts on here that Ruby and C++ can hold hands once in a while. How flexible is this relationship? Is it rarely that this would work? Thank you Very much for your time! EDIT: This has to be the one community on the internet that doesn't suck. Why have I never posted before? You guys are awesome!

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• Is there a resource that explains the benefits of layered programming?

  - by P.Brian.Mackey

  Some developers I know favor what I would call a procedural programming style. I recognize that procedural programming has its uses, albeit not in the business application world of .NET programming. So let's say we have a winform application with a buttonclick event. The buttonclick handles everything from the UI configuration to the database call and data manipulation. So you end up with a method that is 100's of lines of code long. Outside the fact that this code can't be considered test-able for various reasons, this style of programming is fragile to change. I can talk bout OO, Anti-patterns, etc. The problem is that any distinct topic I can dream up requires a great deal of explanation to understand the potential benefits. Outside of finding a new job (lots of businesses program this way), how can I teach these kinds of developers how to write better code? Obviously we can't sit around a round table and discuss pro's and con's all day due to time constraints and real work that has to be done. Although, training and intense training is the only thing I can think of to fix these problems. Not to say I write perfect code, I most certainly do not. I do believe there are certain best practices that should be followed as a rule E.G. OO in the context of .NET. The most common excuse I hear is "we can't write code fast enough if we do it like that".

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• ArchBeat Link-o-Rama for 2012-03-21

  - by Bob Rhubart

  Webcast: Simplify Oracle RAC Deployment with Oracle VM event.on24.com Tuesday March 20, 2012 - 9am PT / Noon ET Learn how you can: Deploy an Oracle (RAC) Database environment in minutes with Oracle VM templates Create, deploy or convert existing systems into highly available cluster environments Instantly respond to changing demand by relocating resources between servers Speakers: Ronen Kofman – Product Management Director, Oracle Markus Michalewicz – Senior Principal Product Manager, Oracle Webcast: Oracle Business Intelligence Mobile event.on24.com Event Date: Wednesday, March 28, 2012 Time: 10 a.m. PT / 1 p.m. ET Speakers: Pete Manhardt – Director Enterprise Information at Smiths Group, plc Shailesh Shedge – Director BI & Analytics Practice at Ascentt Manan Goel – Director BI Product Marketing at Oracle Seth's Blog: The extraordinary software development manager sethgodin.typepad.com "Being good at programming is insufficient qualification for becoming a world class software project manager/leader," says marketing guru Seth Godin. Mismatch: Developer skills and customer demands | Floyd Teter orclville.blogspot.com "Those of us in the developer community may need to reconsider the law of supply and demand," says Oracle ACE Director Floyd Teter, "and get on with the process of matching our skills to the demands of our customers." SOA gets mobilized; mobile gets SOA-ized: survey | Joe McKendrick www.zdnet.com "Maybe mobile is the killer app for SOA that actually will convince people to adopt the architectural style." Integrating with Oracle Fusion Applications: Discovering Integration Artifacts | Rajesh Raheja rraheja.wordpress.com Rajesh Raheja briefly discusses "the ease with which integrations are now possible using standards-based technologies with enterprise applications." Chargeback and showChargeback and showback...both a 'throw back' | Tom Laszewski blogs.oracle.com Tom Laszeski discusses strategies for tracking and applying the costs of "IT services, hardware or software to the business unit in which they are used." GlassFish 4.0 Virtualization Progress - VirtualBox | The Aquarium blogs.oracle.com Want to spawn GlassFish instances as VirtualBox virtual machines? The Aquarium shares resources that will help you get it done. Thought for the Day "Spring is the time of plans and projects." — Leo Tolstoy

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• How to Hibernate from .NET Apps and How to enable Hibernate in Windows XP

  The usage of Computer desktop or laptop is increased all around the world phenomenally. This link gives you the picture on how power consumption is for various devices we use daily. to reduce the power consumption Hibernate is one of the best way provided by default in Windows Vista or Windows 7. Hibernate feature enables you to close the machine without closing your applications, that means the applications will be restored as they were once we restart the machine. Hibernate feature is not enabled in Windows XP by default. I’ve seen many people that they run (do not switch off) the machines months and months as they do not want to close the windows or applications running in Windows XP. below are the steps to enable Hibernate in Windows XP. Right click on Desktop. Click on properties. Go to screen save tab. Click on power button Select Hibernate tab Check the checkbox “Enabled Hibernate” Apply the settings. Now when you try to shutdown, “Shut down windows” dialog shows “Hibernate” options. Now you can safely close the machine without closing your applications or windows as they will be restored once you on the machine. </SPAN? Some time you might want to provide this future programmatically for the applications you develop for windows. Generally you might want to provide this option in windows applications where process needs huge time. Download managers are the one of the best example. below is the code to do a Hibernate from the .NET code. using System.Windows.Forms;namespace CodeKicks.WinApp.Machine{ public static class MyMachineHelper { public static void DoHibernate() { //Application.SetSuspendState(PowerState.Suspend, true, false); Application.SetSuspendState(PowerState.Hibernate, true, false); } }} span.fullpost {display:none;}

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• Talking JavaOne with Rock Star Charles Nutter

  - by Janice J. Heiss

  JavaOne Rock Stars, conceived in 2005, are the top rated speakers from the JavaOne Conference. They are awarded by their peers who through conference surveys recognize them for their outstanding sessions and speaking ability. Over the years many of the world’s leading Java developers have been so recognized.We spoke with distinguished Rock Star, Charles Nutter. A JRuby Update from Charles NutterCharles Nutter of Red Hat is well known as a lead developer of JRuby, a Ruby implementation of Java that is tightly integrated with Java to allow for the embedding of the interpreter into any Java application with full two-way access between the Java and the Ruby code. Nutter is giving the following sessions at this year’s JavaOne: CON7257 – “JVM Bytecode for Dummies (and the Rest of Us Too)” CON7284 – “Implementing Ruby: The Long, Hard Road” CON7263 – “JVM JIT for Dummies” BOF6682 – “I’ve Got 99 Languages, but Java Ain’t One” CON6575 – “Polyglot for Dummies” (Both with Thomas Enebo) I asked Nutter, to give us the latest on JRuby. “JRuby seems to have hit a tipping point this past year,” he explained, “moving from ‘just another Ruby implementation’ to ‘the best Ruby implementation for X,’ where X may be performance, scaling, big data, stability, reliability, security, and a number of other features important for today's applications. We're currently wrapping up JRuby 1.7, which improves support for Ruby 1.9 APIs, solves a number of user issues and concurrency challenges, and utilizes invokedynamic to outperform all other Ruby implementations by a wide margin. JRuby just gets better and better.” When asked what he thought about the rapid growth of alternative languages for the JVM, he replied, “I'm very intrigued by efforts to bring a high-performance JavaScript runtime to the JVM. There's really no reason the JVM couldn't be the fastest platform for running JavaScript with the right implementation, and I'm excited to see that happen.”And what is Nutter working on currently? “Aside from JRuby 1.7 wrap-up,” he explained, “I'm helping the Hotspot developers investigate invokedynamic performance issues and test-driving their new invokedynamic code in Java 8. I'm also starting to explore ways to improve the general state of dynamic languages on the JVM using JRuby as a guide, and to help the JVM become a better platform for all kinds of languages.”

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• .NET Reflector Pro T-shirt contest - and the winner is...

  - by Laila

  Three weeks ago, I kicked off a T-shirt design contest. We've been eagerly poring over the results and today, it's finally announcement time! Although many of you raced to design some great t-shirts for us, we ended up with a clear winner who came up with a nice design and an original slogan that accurately represents what .NET Reflector Pro lets you do: decompile and debug C# and VB.NET code. So, the winner is... Mandeep Sangha! Mandeep sent us the following awesome design via the Twitter account, mss_10: We liked the combination of detective and superhero elements through the magnifying glass and the slogan. Batman (possibly the most eminent of detective-superheroes?) would be proud to wear this under his suit. Mandeep will become the happy owner of a free copy of .NET Reflector Pro and an exciting box of Red Gate goodies... as well as a copy of their very own t-shirt once it's been brought to life by our printing shop! The t-shirts will bear the name of their designer, and will be made available at .NET developer events around the world, such as conferences, tradeshows and user group events. Congratulations, Mandeep! We'll be in touch to sort out the details of your prizes. But that wasn't the only great design we received. We chose three runners-up as well: Sam Beauvois: http://twitpic.com/1vvsi9 Sherwin Rice: http://www.greenwaytechno.com/img/tee-1.png Mathieu Grétry: http://blog.section9.be/public/tshirt_reflector_01.png Thanks to you all for taking part in the contest. You'll all receive a free license for .NET Reflector Pro! We'll get in touch with you individually through twitter, so that we can get you your prizes. Keep an eye out for this T-shirt - it'll soon be making its way to an event near you!

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• moving from wpf to html5

  - by HighCore

  I don't even know if this is the right StackExchange site to post this question. If it isn't, please excuse me and please let me know which would be the right one. I am an experienced WPF developer, and I seriously love the technology. I feel pretty good when working with XAML, bindings, templates, triggers, MVVM and all the WPF world of goodness. Now I have recieved a job offer which surpasses my current salary by 50%. It a position to work as a C# developer in an ASP.Net MVC4 + HTML5 project. I have never EVER in my whole life worked with ASP.Net, nor HTML and I never ever did a web page or web application before. I certainly find myself worried that I will lose all the comfort and joy I live every day coding in WPF. And in the other hand I understand and have seen in these 3/4 months of job hunting that there's a LOT of ASP.Net and really really little or no WPF in the job market (at least here), so I somehow feel forced towards it. So, my question is: Can anybody who had to go thru this type of change tell me the pros and cons of working with these technologies from a developer's perspective? I don't care about open-source / non-microsoft or non-desktop, I care about REAL development experience in every day working with these techs, and whether ASP.Net MVC 4 + HTML + JS is as crappy as I think it is comparing it to WPF.

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• Oracle Magazine: Getting started with SQL Analytics

  - by KLaker

  I am currently working on a series of podcasts covering the broad categories of our SQL analytical functions and features and while I was doing some research I came across of series of four articles in the Oracle Magazine. This series of article is written by Melanie Caffrey who is a senior development manager at Oracle. She is a coauthor of Expert PL/SQL Practices for Oracle Developers and DBAs (Apress, 2011) and Expert Oracle Practices: Oracle Database Administration from the Oak Table (Apress, 2010). The four articles are under the banner "Technology: SQL 101" and parts 9, 10, 11 and 12 cover SQL analytics. Here are the links to the four articles: Jan 2013 Having Sums, Averages, and Other Grouped Data March 2013 A Window into the World of Analytic Functions May 2013 Leading Ranks and Lagging Percentages: Analytic Functions, Continued July 2013 Pivotal Access to Your Data: Analytic Functions, Concluded The articles cover topics such as GROUP BY, SUM, AVG, HAVING, window functions, RANK, FIRST, LAST, LAG, LEAD etc.   The great news is that  you can try out the examples in this series. All you need is access to an Oracle Database instance. All the schemas, data sets and SQL statements that you will need can be downloaded from a link included in the January article.    I hope you find this series of articles useful.

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• Multiple audio sources on a single gameObject in unity

  - by angryInsomniac

  So, I have an audio system set up wherein I have loaded all my audio clips centrally and play them on demand by passing the requesting audioSource into the sound manager. However, there is a complication wherein if I want to overlay multiple looping sounds, I need to have multiple audio sources on an object, which is fine , so I created two in my script instantiated them and played my clips on them and then the world went crazy. For some reason, when I create two audio Sources in an object only the latest one is ever used, even if I explicitly keep objects separated, playing a clip on one or the other plays the clip on the last one that was created, furthermore, either this last one is not created in the right place or somehow messes with the rolloff rules because I can hear it all across my level, havign just one source works fine, but putting a second one on it causes shit to go batshit insane. Does anyone know the reason / solution for this ? Some pseudocode : guardSoundsSource = (AudioSource)gameObject.AddComponent("AudioSource"); guardSoundsSource.name = "Guard_Sounds_source"; // Setup this source guardThrusterSource = (AudioSource)gameObject.AddComponent("AudioSource"); guardThrusterSource.name = "Guard_Thruster_Source"; // setup this source // play using custom Sound manager soundMan.soundMgr.playOnSource(guardSoundsSource,"Guard_Idle_loop" ,true,GameManager.Manager.PlayerType); // this method prints out the name of the source the sound was to be played on and it always shows "Guard_Thruster_Source" even on the "Guard_Idle_loop" even though I clearly told it to use "Guard_Sounds_source"

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• Drawing multiple triangles at once isn't working

  - by Deukalion

  I'm trying to draw multiple triangles at once to make up a "shape". I have a class that has an array of VertexPositionColor, an array of Indexes (rendered by this Triangulation class): http://www.xnawiki.com/index.php/Polygon_Triangulation So, my "shape" has multiple points of VertexPositionColor but I can't render each triangle in the shape to "fill" the shape. It only draws the first triangle. struct ShapeColor { // Properties (not all properties) VertexPositionColor[] Points; int[] Indexes; } First method that I've tried, this should work since I iterate through the index array that always are of "3s", so they always contain at least one triangle. //render = ShapeColor for (int i = 0; i < render.Indexes.Length; i += 3) { device.DrawUserIndexedPrimitives<VertexPositionColor> ( PrimitiveType.TriangleList, new VertexPositionColor[] { render.Points[render.Indexes[i]], render.Points[render.Indexes[i+1]], render.Points[render.Indexes[i+2]] }, 0, 3, new int[] { 0, 1, 2 }, 0, 1 ); } or the method that should work: device.DrawUserIndexedPrimitives<VertexPositionColor> ( PrimitiveType.TriangleList, render.Points, 0, render.Points.Length, render.Indexes, 0, render.Indexes.Length / 3, VertexPositionColor.VertexDeclaration ); No matter what method I use this is the "typical" result from my Editor (in Windows Forms with XNA) It should show a filled shape, because the indexes are right (I've checked a dozen of times) I simply click the screen (gets the world coordinates, adds a point from a color, when there are 3 points or more it should start filling out the shape, it only draws the lines (different method) and only 1 triangle). The Grid isn't rendered with "this" shape. Any ideas?

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• Drawing lines in 3D space

  - by DeadMG

  When attempting to draw a line in 3D space with D3DPT_LINELIST, then Direct3D gives me an error about an invalid vertex declaration, saying that it cannot be converted to an FVF. I am using the same vertex declaration and shader/stream setup as for my D3DPT_TRIANGLELIST rendering which works absolutely correctly. How can I use D3DPT_LINELIST to render some lines in 3D space? Edit: Oopsie, forgot my codeses. Here's my raw Draw call. D3DCALL(device->SetStreamSource(1, PerBoneBuffer.get(), 0, sizeof(PerInstanceData))); D3DCALL(device->SetStreamSourceFreq(1, D3DSTREAMSOURCE_INSTANCEDATA | 1)); D3DCALL(device->SetStreamSource(0, LineVerts, 0, sizeof(D3DXVECTOR3))); D3DCALL(device->SetStreamSourceFreq(0, D3DSTREAMSOURCE_INDEXEDDATA | lines.size())); D3DCALL(device->SetIndices(LineIndices)); PerInstanceData* data; std::vector<Wide::Render::Line*> lines_vec(lines.begin(), lines.end()); D3DCALL(PerBoneBuffer->Lock(0, lines.size() * sizeof(PerInstanceData), reinterpret_cast<void**>(&data), D3DLOCK_DISCARD)); std::for_each(lines.begin(), lines.end(), [&](Wide::Render::Line* ptr) { data->Color = D3DXColor(ptr->Colour); D3DXMATRIXA16 Translate, Scale, Rotate; D3DXMatrixTranslation(&Translate, ptr->Start.x, ptr->Start.y, ptr->Start.z); D3DXMatrixScaling(&Scale, ptr->Scale, 1, 1); D3DXMatrixRotationQuaternion(&Rotate, &D3DQuaternion(ptr->Rotation)); data->World = Scale * Rotate * Translate; }); D3DCALL(PerBoneBuffer->Unlock()); D3DCALL(device->DrawIndexedPrimitive(D3DPRIMITIVETYPE::D3DPT_LINELIST, 0, 0, 2, 0, 1)); Here's my vertex declaration: D3DVERTEXELEMENT9 BasicMeshVertices[] = { {0, 0, D3DDECLTYPE_FLOAT3, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_POSITION, 0}, {1, 0, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 0}, {1, 16, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 1}, {1, 32, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 2}, {1, 48, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_TEXCOORD, 3}, {1, 64, D3DDECLTYPE_FLOAT4, D3DDECLMETHOD_DEFAULT, D3DDECLUSAGE_COLOR, 0}, D3DDECL_END() }; The LineIndices are just 0, 1 and the LineVerts are just {0,0,0} and {1,0,0}, to represent a unit 3D line along the X axis.

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• ArchBeat Link-o-Rama for October 22, 2013

  - by OTN ArchBeat

  The road ahead for WebLogic 12c | Edwin Biemond Oracle ACE Edwin Biemond shares his thoughts on announced new features in Oracle WebLogic 12.1.3 & 12.1.4 and compares those upcoming releases to Oracle WebLogic 12.1.2. Oracle BI Apps 11.1.1.7.1 – GoldenGate Integration - Part 2: Setup and Configuration | Michael Rainey Michael Rainey continues his series with another technical article for you GoldenGate fans. There's A Virtual Developer Day in Your Future Have you experienced OTN VDD? Relax, it's not something that requires medical attention. But an OTN Virtual Developer Day event will enlarge your brain with hands-on information on Oracle technologies. Upcoming events will cover Oracle WebLogic and Coherence (Nov 5) and Oracle ADF (Nov 19). My Summary of Oracle Open World 2013 | Luis Weir SOA/Middleware specialist Luis Weir's first trip to Oracle OpenWorld was what you might call a total immersion experience. His blog post includes details about what kept him very, very busy during his OOW13 experience. Live Blog: Book Review of Building Modular Cloud Apps with OSGi by Bert Ertman and Paul Bakker | Lucas Jellema This interesting post from Oracle ACE Director Lucas Jellema is a work in progress. He's updating as he goes. Check it out. Thought for the Day padding-left: 20px; padding-right: 20px;"> "In the information age, you don't teach philosophy as they did after feudalism. You perform it. If Aristotle were alive today he'd have a talk show." — Timothy Leary, American psychologist and writer (October 22, 1920 – May 31, 1996) Source: brainyquote.com

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• Selecting a JAX-RS implementation for a new project

  - by Fernando Correia

  I'm starting a new Java project which will require a RESTful API. It will be a SaaS business application serving mobile clients. I have developed one project with Java EE 6, but I'm not very familiar with the ecosystem, since most of my experience is on the Microsoft platform. Which would be a sensible choice for a JAX-RS implementation for a new project such as described? Judging by Wikipedia's list, main contenders seem to be Jersey, Apache CXF, RESTeasy and Restlet. But the Comparison of JAX-RS Implementations cited on Wikipedia is from 2008. My first impressings from their respective homepages is that: CXF aims to be a very comprehensive solution (reminds me of WCF in the Microsoft space), which makes me think it can be more complex to understand, setup and debug than what I need; Jersey is the reference implementation and might be a good choice, but it's legacy from Sun and I'm not sure how Oracle is treating it (announcements page doesn't work and last commit notice is from 4 months ago); RESTeasy is from JBoss and probably a solid option, though I'm not sure about learning curve; Restlet seems to be popular but has a lot of history, I'm not sure how up-to-date it is in the Java EE 6 world or if it carries a heavy J2EE mindset (like lots of XML configuration). What would be the merits of each of these alternatives? What about learning curve? Feature support? Tooling (e.g. NetBeans or Eclipse wizards)? What about ease of debugging and also deployment? Is any of these project more up-to-date than the others? How stable are them?

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• Is it just me or is this a baffling tech interview question

  - by Matthew Patrick Cashatt

  Background I was just asked in a tech interview to write an algorithm to traverse an "object" (notice the quotes) where A is equal to B and B is equal to C and A is equal to C. That's it. That is all the information I was given. I asked the interviewer what the goal was but apparently there wasn't one, just "traverse" the "object". I don't know about anyone else, but this seems like a silly question to me. I asked again, "am I searching for a value?". Nope. Just "traverse" it. Why would I ever want to endlessly loop through this "object"?? To melt my processor maybe?? The answer according to the interviewer was that I should have written a recursive function. OK, so why not simply ask me to write a recursive function? And who would write a recursive function that never ends? My question: Is this a valid question to the rest of you and, if so, can you provide a hint as to what I might be missing? Perhaps I am thinking too hard about solving real world problems. I have been successfully coding for a long time but this tech interview process makes me feel like I don't know anything. Final Answer: CLOWN TRAVERSAL!!! (See @Matt's answer below) Thanks! Matt

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• ArchBeat Link-o-Rama Top 20 for April 1-9, 2012

  - by Bob Rhubart

  The top 20 most popular items shared via my social networks for the week of April 1 - 8, 2012. Webcast: Oracle Maximum Availability Architecture Best Practices w/Tom Kyte - April 12 Oracle Cloud Conference: dates and locations worldwide Bad Practice Use Case for LOV Performance Implementation in ADF BC | Oracle ACE Director Andresjus Baranovskis How to create a Global Rule that stores a document’s folder path in a custom metadata field | Nicolas Montoya MySQL Cluster 7.2 GA Released How to deal with transport level security policy with OSB | Jian Liang Webcast Series: Data Warehousing Best Practices http://bit.ly/I0yUx1 Interactive Webcast and Live Chat: Oracle Enterprise Manager Ops Center 12c Launch - April 12 Is This How the Execs React to Your Recommendations? | Rick Ramsey Unsolicited login with OAM 11g | Chris Johnson Event: OTN Developer Day: MySQL - New York - May 2 OTN Member discounts for April: Save up to 40% on titles from Oracle Press, Pearson, O'Reilly, Apress, and more Get Proactive with Fusion Middleware | Daniel Mortimer How to use the Human WorkFlow Web Services | Oracle ACE Edwin Biemond Northeast Ohio Oracle Users Group 2 Day Seminar - May 14-15 - Cleveland, OH IOUG Real World Performance Tour, w/Tom Kyte, Andrew Holdsworth, Graham Wood WebLogic Server Performance and Tuning: Part I - Tuning JVM | Gokhan Gungor Crawling a Content Folio | Kyle Hatlestad The Java EE 6 Example - Galleria - Part 1 | Oracle ACE Director Markus Eisele Reminder: JavaOne Call For Papers Closing April 9th, 11:59pm | Arun Gupta Thought for the Day "A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable." — Leslie Lamport

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• I'm a student learning C++ and I've recently found out about Ruby. Would learning (some of) Ruby help me with C++ or would it just confuse me?

  - by Von32

  As the title says, I'm a student that will be starting my second year of C++ very soon. I've discovered Ruby, however. While I've heard much buzz about the language before, I've disregarded it because I always thought it wasn't something that would be useful. However, I've found a number of FANTASTIC tutorials on ruby and am interested in learning it (probably because it seems so straightforward). Would playing around with ruby be a good or bad idea? I understand that there's not such thing as bad knowledge, but I'm afraid that Ruby will only confuse me when dealing with C++. How different from C++ is it? I've read it's based on C in some way. I've read some posts on here that Ruby and C++ can hold hands once in a while. How flexible is this relationship? Is it rarely that this would work? How useful is Ruby in the real world? I'm not specifically asking about jobs- I'm more interested in what sort of applications may come from this language. Any specific examples worth looking at?

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• How to make an object stay relative to another object

  - by Nick

  In the following example there is a guy and a boat. They have both a position, orientation and velocity. The guy is standing on the shore and would like to board. He changes his position so he is now standing on the boat. The boat changes velocity and orientation and heads off. My character however has a velocity of 0,0,0 but I would like him to stay onboard. When I move my character around, I would like to move as if the boat was the ground I was standing on. How do keep my character aligned properly with the boat? It is exactly like in World Of Warcraft, when you board a boat or zeppelin. This is my physics code for the guy and boat: this.velocity.addSelf(acceleration.multiplyScalar(dTime)); this.position.addSelf(this.velocity.clone().multiplyScalar(dTime)); The guy already has a reference to the boat he's standing on, and thus knows the boat's position, velocity, orientation (even matrices or quaternions can be used).

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• Let's introduce the Oracle Enterprise Data Quality family!

  - by Sarah Zanchetti

  The Oracle Enterprise Data Quality family of products helps you to achieve maximum value from their business applications by delivering fit-­for-­purpose data. OEDQ is a state-of-the-art collaborative data quality profiling, analysis, parsing, standardization, matching and merging product, designed to help you understand, improve, protect and govern the quality of the information your business uses, all from a single integrated environment. Oracle Enterprise Data Quality products are: Oracle Enterprise Data Quality Profile and Audit Oracle Enterprise Data Quality Parsing and Standardization Oracle Enterprise Data Quality Match and Merge Oracle Enterprise Data Quality Address Verification Server Oracle Enterprise Data Quality Product Data Parsing and Standardization Oracle Enterprise Data Quality Product Data Match and Merge Also, the following are some of the key features of OEDQ: Integrated data profiling, auditing, cleansing and matching Browser-based client access Ability to handle all types of data – for example customer, product, asset, financial, operational Connection to any JDBC-compliant data sources and targets Multi-user project support (role-based access, issue tracking, process annotation, and version control) Services Oriented Architecture (SOA) - support for designing processes that may be exposed to external applications as a service Designed to process large data volumes A single repository to hold data along with gathered statistics and project tracking information, with shared access Intuitive graphical user interface designed to help you solve real-world information quality issues quickly Easy, data-led creation and extension of validation and transformation rules Fully extensible architecture allowing the insertion of any required custom processing  If you need to learn more about EDQ, or get assistance for any kind of issue, the Oracle Technology Network offers a huge range of resources on Oracle software. Discuss technical problems and solutions on the Discussion Forums. Get hands-on step-by-step tutorials with Oracle By Example. Download Sample Code. Get the latest news and information on any Oracle product. You can also get further help and information with Oracle software from: My Oracle Support Oracle Support Services An Information Center is available, where you can find technical information and fast solutions to the most common already solved issues: Information Center: Oracle Enterprise Data Quality [ID 1555073.2]

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• Oracle OpenWorld 2011 Call For Papers is Now Open

  - by ruth.donohue

  What is Call for Papers? First, let’s take a small step back. Oracle OpenWorld is the world's largest event dedicated to helping enterprises understand and harness the power of information and the best place to see that technology in action. Oracle OpenWorld showcases the customers and partners whose innovation with Oracle translates to better business results. In addition, there are many opportunities to network with Oracle employees, partners and customers. Oracle OpenWorld 2011 will be held October 2-6 in San Francisco. (Note: Oracle hosts other OpenWorld conferences in China and South America, usually in December) Call for Papers is your opportunity to submit a topic to present at Oracle OpenWorld. When submitting your topic, be sure to describe what you plan to discuss and the value of the presentation to other attendees. So think about the interesting and exciting things you have done with Siebel CRM or Oracle CRM On Demand (or any Oracle product), and submit your topic. The deadline is Sunday, March 27th, so think fast. By the way, if you are selected to present at Oracle OpenWorld, you’ll receive a complimentary full conference pass! And stay tuned in the coming months, we’ll keep you posted on all of the exciting things happening with Oracle CRM at Oracle OpenWorld 2011. Start making your plans to attend now… You won’t want to miss it!   Technorati Tags: Oracle OpenWorld,OOW11,openworld

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• Unit Tests as a learning tool - a good idea?

  - by Ekkehard.Horner

  I'm interested in ways and means for learning (a) programming language(s) efficiently. I believe that using Unit Test concepts and infrastructure early in that process is a good thing, even better than starting with "Hello world". Why: To write a decent program even for a toy/restricted problem in a new language, you'll have to master many heterogenous concepts (control flow & variables & IO ...), you are tempted to glance over details just to get your program 'to work'. Putting (your understanding of) the facts about the new language in assertions with good descriptions (=success messages) enforces thinking thru/clearness/precision. Grouping topics and adding assertions to such groups is much easier than incorporation features from the 2. chapter of your "Learning X" book to your chapter 1 program. Why not: 'Real' Unit Tests are meant to output "1234 tests ok; 1 failure: saveWorld() chokes on negative input"; 'didactic' Unit Tests should output relevant facts about the new language like perl6 10-string.t # ### p5chop ... ok 13 - p5chop( "cbä" ) returns "ä" ok 14 - after that, victim is changed to "cb" # ### (p6) chop ... ok 27 - (p6) chop( "cbä" ) returns chopped copy: "cb" ok 18 - after that, victim is unchanged: "cbä" # ### chomp ... So (mis?)using Unit Tests may be counterproductive - practicing actions while learning you wouldn't use professionally. How: Writing 'didactic' Unit Tests in languages with lightweight testing systems (Perl 5/6) is easy; (mis?)using more elaborate systems (JUnit, CppUnit) may be not worth the effort or not suitable for a person just starting with a new language. So Is using Unit Tests as a learning tool a bad idea? Can the Unit Test tool(s) of your favourite language(s) used didactically? Should implementation details (eventually) be discussed here or over at stackoverflow.com?

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• The Oracle OpenWorld 2012 Call for Papers Closes April 9

  - by Kerrie Foy

  It is On! Oracle OpenWorld 2012 Call for Papers is closes April 9.   This year's OpenWorld event is September 30  - October 4, Moscone Center, San Francisco. Oracle OpenWorld is among the world’s largest industry events for good reason. It offers a vast array of learning and networking opportunities in one of the planet’s great cities.  And one of the key reasons for its popularity is the prominence of presentations by customers. If you would like to deliver a presentation based on your experience, now is the time to submit your abstract for review by the selection panel. The competition is strong: roughly 18% of entries are accepted each year from more than 3,000 submissions. Review panels are made up of experts both internal and external to Oracle. Successful submissions often (but not exclusively) focus on customer successes, how-tos, or best practices. http://www.oracle.com/openworld/call-for-papers/information/index.html What is in it for you? Recognition, for one thing. Accepted sessions are publicized in the content catalog, which goes live in mid-June, and sessions given by external speakers often prove the most popular. Plus, accepted speakers get a complimentary pass to Oracle OpenWorld with access to all sessions and networking events- that could save you up to $2,595! Be sure designate your session for inclusion in the correct track by selecting  “APPLICATIONS: Product Lifecycle Management from the Primary Track drop down menu. Looking forward to seeing you at this year's OpenWorld!

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• Simultaneous AI in turn based games

  - by Eduard Strehlau

  I want to hack together a roguelike. Now I thought about entity and world representation and got to a quite big problem. If you want all the AI to act simultaneously you would normally(in cellular automa for examble) just copy the cell buffer and let all action of indiviual cells depend on the copy. Actions which are not valid anymore after some cell before the cell you are currently operating on changed the original enviourment(blocking the path) are just ignored or reapplied with the "current"(between turns) environment. After all cells have acted you copy the current map to the buffer again. Now for an environment with complex AI and big(datawise) entities the copying would take too long. So I thought you could put every action and entity makes into a que(make no changes to the environment) and execute the whole que after everyone took their move. Every interaction on this que are realy interacting entities, so if a entity tries to attack another entity it sends a message to it, the consequences of the attack would be visible next turn, either by just examining the entity or asking the entity for data. This would remove problems like what happens if an entity dies middle in the cue but got actions or is messaged later on(all messages would go to null, and the messages from the entity would either just be sent or deleted(haven't decided yet) But what would happen if a monster spawns a fireball which by itself tracks the player(in the same turn). Should I add the fireball to the enviourment beforehand, so make a change to the environment before executing the action list or just add the ball to the "need updated" list as a special case so it doesn't exist in the environment and still operates on it, spawing after evaluating the action list? Are there any solutions or papers on this subject which I can take a look at? EDIT: I don't need information on writing a roguelike I need information on turn based ai in respective to a complex enviourment.

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• Windows Azure BidNow Sample &ndash; definitely worth a look

  - by Eric Nelson

  [Quicklink: download new Windows Azure sample from http://bit.ly/bidnowsample] On Mondays (17th May) in the  6 Weeks of Windows Azure training (Now full) Live Meeting call, Adrian showed BidNow as a sample application built for Windows Azure. I was aware of BidNow but had not found the time to take a look at it nor seems it running before. Adrian convinced me it was worth some a further look. In brief I like it :-) It is more than Hello World, but still easy enough to follow. Bid Now is an online auction site designed to demonstrate how you can build highly scalable consumer applications using Windows Azure. It is built using Visual Studio 2008, Windows Azure and uses Windows Azure Storage. Auctions are processed using Windows Azure Queues and Worker Roles. Authentication is provided via Live Id. Bid Now works with the Express versions of Visual Studio and above. There are extensive setup instructions for local and cloud deployment You can download from http://bit.ly/bidnowsample (http://code.msdn.microsoft.com/BidNowSample) and also check out David original blog post. Related Links UK based? Sign up to UK fans of Windows Azure on ning Check out the Microsoft UK Windows Azure Platform page for further links

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• Talking JavaOne with Rock Star Charles Nutter

  - by Janice J. Heiss

  JavaOne Rock Stars, conceived in 2005, are the top rated speakers from the JavaOne Conference. They are awarded by their peers who through conference surveys recognize them for their outstanding sessions and speaking ability. Over the years many of the world’s leading Java developers have been so recognized.We spoke with distinguished Rock Star, Charles Nutter. A JRuby Update from Charles NutterCharles Nutter of Red Hat is well known as a lead developer of JRuby, a Ruby implementation of Java that is tightly integrated with Java to allow for the embedding of the interpreter into any Java application with full two-way access between the Java and the Ruby code. Nutter is giving the following sessions at this year’s JavaOne: CON7257 – “JVM Bytecode for Dummies (and the Rest of Us Too)” CON7284 – “Implementing Ruby: The Long, Hard Road” CON7263 – “JVM JIT for Dummies” BOF6682 – “I’ve Got 99 Languages, but Java Ain’t One” CON6575 – “Polyglot for Dummies” (Both with Thomas Enebo) I asked Nutter, to give us the latest on JRuby. “JRuby seems to have hit a tipping point this past year,” he explained, “moving from ‘just another Ruby implementation’ to ‘the best Ruby implementation for X,’ where X may be performance, scaling, big data, stability, reliability, security, and a number of other features important for today's applications. We're currently wrapping up JRuby 1.7, which improves support for Ruby 1.9 APIs, solves a number of user issues and concurrency challenges, and utilizes invokedynamic to outperform all other Ruby implementations by a wide margin. JRuby just gets better and better.” When asked what he thought about the rapid growth of alternative languages for the JVM, he replied, “I'm very intrigued by efforts to bring a high-performance JavaScript runtime to the JVM. There's really no reason the JVM couldn't be the fastest platform for running JavaScript with the right implementation, and I'm excited to see that happen.”And what is Nutter working on currently? “Aside from JRuby 1.7 wrap-up,” he explained, “I'm helping the Hotspot developers investigate invokedynamic performance issues and test-driving their new invokedynamic code in Java 8. I'm also starting to explore ways to improve the general state of dynamic languages on the JVM using JRuby as a guide, and to help the JVM become a better platform for all kinds of languages.” Originally published on blogs.oracle.com/javaone.

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