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  • Am I misunderstanding chown and chmod?

    - by isomorphismes
    I want to either extend the size of my guest partition or figure out how to copy stuff from the guest partition to my normal /home directory. (Because of some other problems I can only run Xorg as guest, but I can log into virtual console as myself or root.) Here's the motivation: I want to torrent a large file. It's larger than my guest filesystem. But I have plenty of space on my real drive, I just can't log into it graphically. So I tried to set up a "pipe" to get the file out of the tmpfs. I did: su -u myself #catch mkdir ~/receiver_dir sudo su cd /tmp/guest-lkj567UIO/ #throw ln -s mario_pipe /home/myself/receiver_dir chown -R guest-lkj567UIO /home/myself/receiver_dir chown -R guest-lkj567UIO /tmp/guest-lkj567UIO/mario_pipe chmod -R a+rw /home/myself/receiver_dir chmod -R a+rw /tmp/guest-lkj567UIO/mario_pipe su -u guest-lkj567UIO cd /tmp/guest-lkj567UIO cd mario_pipe touch something #success! However, when I try to torrent to /tmp/guest-lkj567UIO/mario_pipe, Transmission says I don't have write permissions. But it looks like I just wrote there? And that everybody (a+rw) can write there in fact? Maybe this indicates I don't actually understand chown and chmod but nothing from their man pages pops out.

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  • Partner Showcase -- GreyHeller

    - by PeopleTools Strategy
    This is the next in a series of posts spotlighting some of our creative partners.  GreyHeller is a PeopleSoft-focused software company founded by PeopleTools alumni Larry Grey and Chris Heller.  GreyHeller’s products focus on addressing the technology needs of PeopleSoft customers in the areas of mobile Enablement, reporting/business intelligence, security, and change management.  The company helps customers protect and extend their investment in PeopleSoft.GreyHeller’s products and services are in use by nearly 100 PeopleSoft customers on 6 continents.  Their product solutions are lightweight bolt-ons--extensions to a customer’s PeopleSoft environment requiring no new infrastructure.  This makes for rapid implementations.A major area of interest for PeopleSoft customers these days is mobile enablement.  GreyHeller's current mobile implementations include the following customers: Texas Christian University (Live:  TCU student newspaper article here) Coppin State University (Live) University of Cambridge (June go-live) HealthSouth (June go-live) Frostburg State Univrsity (Q3 go-live) Amedisys (Q3 go-live) GreyHeller maintains a PeopleTools-focused blog that provides tips, techniques, and code snippets aimed at helping PeopleSoft customers make the most of their PeopleSoft system.  In addition to their blog, the GreyHeller team conducts and records weekly webinars that demonstrate latest PeopleTools features and Tips and techniques.  Recordings of these webinars can be accessed here.Visit GreyHeller’s web site for more information on the company and its work.

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  • Extending AutoVue Through the API

    - by GrahamOracle
    The AutoVue API (previously called the “VueBean” API) is a great way to extend AutoVue Client/Server Deployment – specifically the client component – beyond the out-of-the-box capabilities and into new use-cases. In addition to having a solid grasp of J2SE programming, make sure to leverage the following resources if you’re developing or interested in developing customizations/extensions to AutoVue Client/Server Deployment: Programmer’s Guide: Before all else, read through the AutoVue API Programmer’s Guide to get an understanding of the architecture of the API. The Programmer’s Guide is included with the installation of AutoVue, and is posted on the Oracle Technology Network (OTN) website for the recent versions of AutoVue: http://www.oracle.com/technetwork/documentation/autovue-091442.html Javadocs: The AutoVue API Javadocs document the many packages, classes, and methods available to you. The Javadocs are included in the product installation under the \docs\JavaDocs\VueBean folder (easiest starting point is through the file index.html). Integrations Forum: If you have development questions that aren’t answered through the documentation, feel free to register and post in the public AutoVue Integrations Forum. For more information refer to the following blog post from October 2010: https://blogs.oracle.com/enterprisevisualization/entry/exciting_news_autovue_integrat Code Samples: Although the Oracle Support team’s scope of Support for API/customization topics is to answer questions regarding information already provided in the documentation (i.e. not to design or develop custom solutions), there are cases where Support comes across interesting samples or code snippets that may benefit various customers. In those cases, our Support team posts the samples into the Oracle knowledge base, and tracks them through a single reference note. The link to the KM Note depends on how you currently access the My Oracle Support portal: Flash interface: https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=REFERENCE&id=1325990.1 (New) HTML interface: https://supporthtml.oracle.com/epmos/faces/ui/km/SearchDocDisplay.jspx?type=DOCUMENT&id=1325990.1 Happy coding!

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  • Oracle BPM Marketing Update

    - by JuergenKress
    Thanks to Ajay Khanna from the global marketing team for the comprehensive BPM marketing overview: Content and Collateral Whitepaper: What's New in Oracle BPM Suite 11g: Review By Bruce Silver Business Driven Process Management Analyst Report: [Ovum] SWOT Assessment: Oracle BPM Suite 11g Solution Brief: Managing Unpredictability with BPM for Adaptive Case Management Solution brief: BPM in the Public Sector: Increasing Efficiency and Responsiveness Datasheet: Automating Financial Reports Approval with Oracle Process Accelerators Financial Services Loan Origination Business Account Opening Electronic Forms Management Public Sector Incident Reporting Oracle Process Accelerators for Horizontal Solutions Employee Onboarding References: BPM Suite Customers in Action Video: Avea Legal Department runs Better with BPM University of Melbourne Improves Efficiency with Oracle BPM Press: San Joaquin County Leverages Oracle to Deliver Better Services to its 650,000 Residents On-Demand Assets Webcast: New Directions with Business-Driven BPM - New Oracle BPM Suite Extend Your Applications with Oracle Business Process Management Screen Cast: Customer Experience on Your Mind? Think BPM + Social + Mobile Video: Introducing Oracle BPM Suite Assessment Tool : BPM Maturity Self Assessment Blog Series Transforming Public Sector With Process Excellence New Oracle Process Accelerators in Financial Services & Telco Blog: Detect, Analyze, Act Fast with BPM Part I - Manage Processes, the way Octopus does Part II - Perry Mason and the Case of the Unstructured Process Part III - Managing the Unstructured, the Flexible and the Adaptive Resource Kits BPM Resource Kit Financial Services: BPM in Financial Services Public Sector: Transforming Public Sector with Process Excellence 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 Mix Forum Technorati Tags: BPM,bpm marketing,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • UK Pilot Event: Fusion Applications Release 8 Simplified UI: Extensibility & Customization of User Experience

    - by ultan o'broin
    Interested? Of course you are! But read on to understand the what, why, where, and the who and ensure this great opportunity is right for you before signing up. There will be some demand for this one, so hurry! What: A one-day workshop where Applications User Experience will preview the proposed content for communicating the user experience (UX) tool kit intended for the next release of Oracle Fusion Applications. We will walk through the content, explain our approach and tell you about our activities for communicating to partners and customers how to customize and extend their Release 8 user experiences for Oracle Fusion Applications with composers and the Oracle Application Development Framework Toolkit. When and Where: Dec. 11, 2013 @ Oracle UK in Thames Valley Park Again: This event is held in person in the UK. So ensure you can travel! Why: We are responding to Oracle partner interest about extending and customizing Simplified UIs for Release 7, and we will be use the upcoming release as our springboard for getting a powerful productivity and satisfaction message out to the Oracle ADF enterprise methodology development community, Fusion customer implementation and tailoring teams and to our Oracle partner ecosystem. This event will also be an opportunity for attendees to give Oracle feedback on the approach too, ensuring our messaging and resources meets your business needs or if there is something else needed to get up and running fast! Who: The ideal participants for this workshop are who will be involved in system implementation roles for HCM and CRM Oracle Fusion Applications Release 8, as well as seasoned ADF developers supporting Oracle Fusion Applications. And yes, Cloud is part of the agenda! How to Register: Use this URL: http://bit.ly/UXEXTUK13 If you have questions, then send them along right away to [email protected]. Deadline: Please RSVP by November 1, 2013.

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  • EclipseLink does multitenancy. Today.

    - by alexismp
    So you heard Java EE 7 will be about the cloud, but that didn't mean a whole lot to you. Then it was characterized as PaaS, something in between IaaS and SaaS. And finally it all became clear when referenced as support for multitenancy. Or did it? When it comes to JPA and persistence is general, multitenancy is defined as the ability to share a database schema among various groups of users (i.e. tenants). This means that there is no database setup or reconfiguration required as the data is co-located in the same database. EclipseLink 2.3 (the Indigo train release) let's you do just that by supporting tenant discriminator column(s) via annotations or XML with applications providing values for these discriminators via an API or PU configuration. Check out details here. EclipseLink 2.3 is scheduled to be the default and supported JPA provider for GlassFish 3.1.1. Another nice feature of this release is the ability to extend persistence units on the fly. The GlassFish Podcast has an interview up with EclipseLink's Doug Clarke. Expect more on multitenancy across the Java EE spectrum as the specification work progressed.

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  • Oracle Unveils AutoVue Release 20.1

    - by prasenjit.niyogi(at)oracle.com
    We are extremely pleased to announce the availability of Oracle's AutoVue Release 20.1. AutoVue 20.1 is the latest major release of the family of Enterprise Visualization solutions from Oracle. Highlights of the release include: Unparalleled new format support and enhancements for 3D CAD, 2D, CAD, ECAD and PDF documents New capabilities that support end-to-end design to manufacture processes in the Electronics & High Tech space, that allow manufacturing engineers to perform accurate manufacturability reviews through better support for variants, overlays and polarity Significant printing enhancements, such as printing of markup notes; support for Excel file print settings; and print in grayscale; which serve to optimize paper-based business processes Powerful integration enablement capabilities to extend visualization into existing enterprise architectures and systems; including AutoVue Hotspots that enable visual navigation and action by linking visual data to structured enterprise data, and new AutoVue Document Print Services (DPS) to enrich enterprise applications with format and platform agnostic printing of any document type Improvements for cost-effective AutoVue deployment and administration, including support for virtualization Release 20.1 Webcast - Attend the webcast on April 13th at 12:00 pm EST to discover what is new and exciting in the latest release. Encourage your customers, prospects, and partners to attend. Title: Oracle Unveils AutoVue Release 20.1 Channel: Oracle AutoVue Channel Register Here: http://www.brighttalk.com/webcast/26282 To discover more about the latest release, and to find out what the customers and partners are saying about the value of this offering, check out the: What's New is AutoVue 20.1 Datasheet You can also learn all about the latest format support here AutoVue 20.1 Format Support Sheet We look forward to seeing you at the webcast. If you have any questions feel free to ask, and we will answer it in this forum. Enjoy AutoVue 20.1!

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  • Directional and orientation problem

    - by Ahmed Saleh
    I have drawn 5 tentacles which are shown in red. I have drew those tentacles on a 2D Circle, and positioned them on 5 vertices of the that circle. BTW, The circle is never be drawn, I have used it to simplify the problem. Now I wanted to attached that circle with tentacles underneath the jellyfish. There is a problem with the current code but I don't know what is it. You can see that the circle is parallel to the base of the jelly fish. I want it to be shifted so that it be inside the jelly fish. but I don't know how. I tried to multiply the direction vector to extend it but that didn't work. // One tentacle is constructed from nodes // Get the direction of the first tentacle's node 0 to node 39 of that tentacle; Vec3f dir = m_tentacle[0]->geNodesPos()[0] - m_tentacle[0]->geNodesPos()[39]; // Draw the circle with tentacles on it Vec3f pos = m_SpherePos; drawCircle(pos,dir,30,m_tentacle.size()); for (int i=0; i<m_tentacle.size(); i++) { m_tentacle[i]->Draw(); } // Draw the jelly fish, and orient it on the 2D Circle gl::pushMatrices(); Quatf q; // assign quaternion to rotate the jelly fish around the tentacles q.set(Vec3f(0,-1,0),Vec3f(dir.x,dir.y,dir.z)); // tanslate it to the position of the whole creature per every frame gl::translate(m_SpherePos.x,m_SpherePos.y,m_SpherePos.z); gl::rotate(q); // draw the jelly fish at center 0,0,0 drawHemiSphere(Vec3f(0,0,0),m_iRadius,90); gl::popMatrices();

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  • Is it possible to build a single game to run in Facebook & Google+?

    - by Songo
    I was asked by my customer to build a Facebook game. The game would be something similar to Mafiawars.com where the game is hosted on a server and run through a frame on Facebook. The thing is after several days of negotiations with the customer and near the finalization of the requirements he mentioned something strange. He said that if the game was successful on Facebook then we may add it to Google+ too. I thought he meant that we'll develop a new version for Google+, but he refused as he argued that the game should be able to support both sites and he won't pay for the same game twice. Now I haven't developed neither Facebook nor Google+ games before, so I don't know if it is possible to build a single Facebook/Google+ game. How would you react to such requirement? How would you design such an application? Notes I confirmed with the customer that he wasn't talking about using Open ID he wanted full integration (sharing post, friend requests,..etc.) I really don't want to lose that customer for numerous reasons (He even agreed to extend the project time to compensate for the time I need to learn Facebook/Google+ APIs)

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  • Overwhelmed by complex C#/ASP.NET project in Visual Studio 2008

    - by Darren Cook
    I have been hired as a junior programmer to work on projects that extend existing functionality in a very large, complex solution. The code base consists of C#, ASP.NET, jQuery, javascript, html and xml. I have some knowledge of all these in addition to fair knowledge of object-oriented programming and its fundamental concepts of inheritance, abstraction, polymorphism and encapsulation. I can follow code up through its base classes, interfaces, abstract classes and understand a large part of the code that I read while doing this. However, this solution is so humongous and so many things get tied together whenever I navigate through the code that I feel absolutely overwhelmed. I often find myself unable to fully follow everything that is going on with objects being serialized, large amounts of C# and javascript operating on the same pages and methods being called from template files that consist mainly of markup. I love learning about code, but trying to deal with this really stresses me out. Additionally, I do know that a significant amount of unit testing has been done but I know nothing about unit testing or how to utilize it. Any advice anyone could offer me regarding dealing with a large code base while using Visual Studio 2008 would be greatly appreciated. Are there tools that I can use to help get a handle on what is going on? Perhaps there are things even in Visual Studio that I am not aware of. How can I follow the code to low level functionality in order to get a better grasp of what is going on at a high level?

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  • good literature for teaching object oriented thinking in C [closed]

    - by Dipan Mehta
    Quite often C is the primary platform for the development. And when things are large scale, I have seen partitioning of the system as different objects is quite a natural thing. Some or many of the object orientated analysis and design principles are used here very well. This is not a debate question about whether or not C is a good candidate for object oriented programming or not. This is also NOT a question how to do OO in C. You can refer to this question and there are probably many such citations. As far as I am concerned, I have learned some of this things while working with many open source and commercial projects. (libjpeg, ffmpeg, Gstreamer which is based on GObject). I can probably extend a few references that explains some of these concepts such as - 1. Event Helix article, 2. Linux Mag article 3. one of my answers which links Schreiner's reference. Unfortunately, when we induct younger folks, it seems too hard to make them learn all of it the hard way. Usually, when we say it's C, a general reaction is to throw away all of the "Object thinking". Looking for help extending above references from those who have been in the similar areas of work. Are there any good formal literature that explains how Object thinking can be made to use while you are working in C? I have seen tons of book on general "object oriented paradigms" but they all focus on advanced languages mostly not in C. You see most C books - but most focus only on the syntax and the obfuscated corners of C and that's it. There are hardly ANY good reference, specially books or any systematic (I mean formal) literature on how to apply OO in C. This is very surprising given that so many large scale open source projects use C which are truly using this very well; but we hardly see any good formal literature on this subject.

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  • Using runtime generic type reflection to build a smarter DAO

    - by kerry
    Have you ever wished you could get the runtime type of your generic class? I wonder why they didn’t put this in the language. It is possible, however, with reflection: Consider a data access object (DAO) (note: I had to use brackets b/c the arrows were messing with wordpress): public interface Identifiable { public Long getId(); } public interface Dao { public T findById(Long id); public void save(T obj); public void delete(T obj); } Using reflection, we can create a DAO implementation base class, HibernateDao, that will work for any object: import java.lang.reflect.Field; import java.lang.reflect.ParameterizedType; public class HibernateDao implements Dao { private final Class clazz; public HibernateDao(Session session) { // the magic ParameterizedType parameterizedType = (ParameterizedType) clazz.getGenericSuperclass(); return (Class) parameterizedType.getActualTypeArguments()[0]; } public T findById(Long id) { return session.get(clazz, id); } public void save(T obj) { session.saveOrUpdate(obj); } public void delete(T obj) { session.delete(obj); } } Then, all we have to do is extend from the class: public class BookDaoHibernateImpl extends HibernateDao { }

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  • Deleting Unused Swaps Partions

    - by Nikita Kononov
    Good evening everyone , I got a little issue with Swap Partitions. Due to some issues after installing Ubuntu first time, I reinstalled it and now I have 3 Swaps. Here is sudo fdisk -l result Disk /dev/sda: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xaa9693fe Device Boot Start End Blocks Id System /dev/sda1 2048 52430847 26214400 1c Hidden W95 FAT32 (LBA) /dev/sda2 * 52430848 540677076 244123114+ 7 HPFS/NTFS/exFAT /dev/sda3 540678142 1465147391 462234625 5 Extended Partition 3 does not start on physical sector boundary. /dev/sda5 1452750848 1465147391 6198272 82 Linux swap / Solaris /dev/sda6 1440352256 1452742655 6195200 82 Linux swap / Solaris /dev/sda7 540678144 1427951615 443636736 83 Linux /dev/sda8 1427953664 1440339967 6193152 82 Linux swap / Solaris So Swaps in /dev/sda5 and /dev/sda6 are no longer in use as far as I understand and thus I was planning to delete them, however faced a problem. What I did is download and burn Gparted Live CD and boot it up, tried to delete those partitions but I have no idea how to add 12GB unallocated memory to the existing OS partition in this case to /dev/sda7 Is there anyway I can delete 2 swaps and extend unallocated memory to /dev/sda7 partion? Thank you in advance!

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  • Book Review: Professional ASP.Net MVC4

    - by Sam Abraham
    The past few weeks have been particularly busy as I continue to dedicate a bigger portion of my free time to refreshing my memory and enhancing my knowledge of best practices pertaining to technologies we plan on using for a major upcoming project. In this blog post, I will be providing a brief overview of my latest reading “Professional ASP.Net MVC4” by Jon Galloway, Phil Haack, Brad Wilson and K. Scott Allen. This book is a must read for web developers looking to enhance their MVC expertise with best practices and tips shared from recognized industry experts. This book takes the reader on a 16-chapter long journey towards being a better ASP.NET MVC developer with chapter 16 putting all information covered in practical context by dissecting the implementation of Nuget.org, a real-life open-source, ASP.NET MVC project.  All code samples referenced in this book are conveniently accessible via NuGet, a free, open-source Library package manager that installs as a Visual Studio Extension. Chapters 2, 3 and 4 thoroughly cover MVC’s various components: Controllers “C”, Views “V” and Models “M” respectively. Chapter 5 covers additional extension methods (Helpers) provided to speed and ease the use of common HTML elements such as forms, textboxes, grids, to name a few… Chapter 6 tackles built-in validation while providing examples and use cases on implementing custom validation that plugs into the MVC framework. Chapters 7 thru 13 discusses the latest on Membership, Ajax, Routing, NuGet and the ASP.Net Web API. Chapters 12 (Dependency Injection) and 13 (Unit Testing) demonstrate a big competitive advantage of MVC with its ease of test-ability and plug-ability. Chapters 14 and 15 targets the advanced developer showcasing how to extend MVC to customize and replace every piece in the framework.In conclusion, I strongly recommend Professional ASP.NET MVC 4 as an excellent read for both developers already using MVC as well as those getting started with the framework.   Many thanks to the Wiley/Wrox User Group Program for their support of our West Palm Beach Developers’ Group.  You can access my reviews of books I recently read: Professional ASP.NET Design Patterns Professional WCF 4.0 Inside Windows Communication Foundation Inside Microsoft SQL Server 2008 series

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  • How can I get cross-browser consistent behavior for TR heights within a table with a set height? [migrated]

    - by Dan
    I have an arbitrary number of tables with an arbitrary number of rows in each, and all tables are the same height. My initial approach was to just set the overall height of the table and hope the rows were smart enough to distribute themselves appropriately. That's not the case. I have 4 different behaviors going on with 4 browsers, but I need them to all render at the very least in a similar way. Safari & Chrome (WebKit): All rows are equal height, creating scroll bars as needed and fitting within table height. Firefox: All rows are the height necessary to fit their content, with the remaining rows overflowing out of the table. Additionally, If the content of the rows does not take up all of the height, only the part of the table with content in it takes the background (though it seems, through use of Firebug, that the actual table [and TR] extend to the bottom of the proper table height). IE: All rows are the height necessary to fit their content, with the remaining rows overflowing out of the table. Obviously this only includes one version of each browser and additional variation would likely appear with more being tested. Ideally, a solution where the browser renders TRs with less content smaller than those with larger content, while still using scrolling within the variable height TRs when the overall height of the table is not enough would be optimum. I could potentially see a solution to achieve that with JS, but can it be done with CSS? Or, if not, can the behavior that WebKit displays be made to work across the browsers? Thanks! PS: Example can be found here.

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  • Need advice on framework design: how to make extending easy

    - by beginner_
    I'm creating a framework/library for a rather specific use-case (data type). It uses diverse spring components, including spring-data. The library has a set of entity classes properly set up and according service and dao layers. The main work or main benefit of the framework lies in the dao and service layer. Developers using the framework should be able to extend my entity classes to add additional fields they require. Therefore I made dao and service layer generic so it can be used by such extended entity classes. I now face an issue in the IO part of the framework. It must be able to import the according "special data type" into the database. In this part I need to create a new entity instance and hence need the actual class used. My current solution is to configure in spring a bean of the actual class used. The problem with this is that an application using the framework could only use 1 implementation of the entity (the original one from me or exactly 1 subclass but not 2 different classes of the same hierarchy. I'm looking for suggestions / desgins for solving this issue. Any ideas?

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  • Register to Attend the AutoVue 20.2 Webcast on April 3, 2012

    - by Pam Petropoulos
    Want to learn more about the latest AutoVue 20.2 release?               Discover what this latest major release of AutoVue can do for you. Join Celine Beck, AutoVue Product Management and Strategy Manager, during this live webcast to discover how the new release can transform your business processes and extend the value of your visualization investment. Hear how customers and partners are improving their workflows and creating differentiated offerings thanks to AutoVue enterprise visualization.   Date: Tuesday, April 3, 2012                                                                                                                                                            Time: 11:00 a.m. EST   Click here to register for this event.   For complete details about the new release, also check out the What’s New in AutoVue 20.2 Datasheet, available here.

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  • Loadbalancing Questions

    - by Van Holtz
    I have been learning networking for about 4 months. Wrote a single standalone Multiplayer server and succeeded with authoritative approach. Now I want to extend it by splitting the single server into clusters to allow even more players to log in to avoid latency issues. Now I have protyped the Loadbalancing server and its running pretty good so far. This is my architecture, I have a master server which acts as a proxy, every sub servers(chat, login, game) connect to the master server as well as all the clients. when a client connects, Client Request: Send Request - MS(Master) - Decides which SS(SubServer) to forward to - Forwards Request to SS - SS - Analyze Message - Send Response to MS - Decides which Client to forward to - Forwards Response to Client Well, it looks like its going through lots of stages. it takes double the time to process the message than a single server approach. i feel like my model isnt the best or i may be wrong. is there any better model or the one they use in professional games? I still want a Master-SubServer approach. I just want to clarify that I'm going in the right direction before writing all my codes. Thanks for any answer :)

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  • How should I load level data in java?

    - by Matthew G.
    I'm setting up my engine for a certain action/arcade game to have a set of commands that would look something like this. Set landscape to grass Create rocks at ... Create player at X, Y Set goal to "Get to point X Y" Spawn enemy at X, Y I'd then have each object knowing what it has to do, and acting on its own. I've been thinking about how to store this data. External data files could be parsed by a level class, and certain objects can be spawned through that. I could also create a base level class and extend it for each level, but that'd create a large amount of classes. Another idea is to have one level parser class, but have a case for each level. This would be extremely silly and bulky, but I mention it because I found that I did this at 2 AM last night. I'm finally getting why I have to plan out my inheritances, though. RIP project. I might be completely missing another option.

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  • Inheritance vs containment while extending a large legacy project

    - by Flot2011
    I have got a legacy Java project with a lot of code. The code uses MVC pattern and is well structured and well written. It also has a lot of unit tests and it is still actively maintained (bug fixing, minor features adding). Therefore I want to preserve the original structure and code style as much as possible. The new feature I am going to add is a conceptual one, so I have to make my changes all over the code. In order to minimize changes I decided not to extend existing classes but to use containment: class ExistingClass { // .... existing code // my code adding new functionality private ExistingClassExtension extension = new ExistingClassExtension(); public ExistingClassExtension getExtension() {return extension;} } ... // somewhere in code ExistingClass instance = new ExistingClass(); ... // when I need a new functionality instance.getExtension().newMethod1(); All functionality that I am adding is inside a new ExistingClassExtension class. Actually I am adding only these 2 lines to each class that needs to be extended. By doing so I also do not need to instantiate new, extended classes all over the code and I may use existing tests to make sure there is no regression. However my colleagues argue that in this situation doing so isn't a proper OOP approach, and I need to inherit from ExistingClass in order to add a new functionality. What do you think? I am aware of numerous inheritance/containment questions here, but I think my question is different.

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  • November New Member Offers

    - by Cassandra Clark - OTN
    Happy November!  OTN has worked with its partners to bring you more new offers or extend their existing ones.Oracle Press New Offer-Oracle Technology Network members get 40% off the newest Oracle Press titles by Oracle ACE Mark Rittman, Oracle Business Intelligence 11g Developers Guide and Oracle Exalytics Revealed  (ebook format only).Extended Offers - Oracle Store - Save 10% on Your Next Software Purchase from the Oracle StorePearson Publistiong - 35% off Hacker’s Delight Manning Publishing - 41% off the MEAP, eBook and print format of the following books: Making Java Groovy OCA Java SE 7 Programmer I Certification Guide Safari Books Online - OTN members get 30 days of free access + 20% off unlimited access to Safari Books Online for 6 months. Packt Publishing - 25% off the print books and 35% off the eBooks listed below: Getting Started with Oracle Data Integrator 11g: A Hands-On Tutorial Oracle Business Intelligence Enterprise Edition 11g: A Hands-On Tutorial  Oracle Certified Associate, Java SE 7 Programmer Study Guides. Murach  Publishing -  Get 30% off for OTN members - Murach’s SQL Server 2012 for Developers by Bryan Syverson and Joel Murach. Get all of this From the OTN Member Discount Page!

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  • Versioning APIs

    - by Sharon
    Suppose that you have a large project supported by an API base. The project also ships a public API that end(ish) users can use. Sometimes you need to make changes to the API base that supports your project. For example, you need to add a feature that needs an API change, a new method, or requires altering of one of the objects, or the format of one of those objects, passed to or from the API. Assuming that you are also using these objects in your public API, the public objects will also change any time you do this, which is undesirable as your clients may rely on the API objects remaining identical for their parsing code to work. (cough C++ WSDL clients...) So one potential solution is to version the API. But when we say "version" the API, it sounds like this also must mean to version the API objects as well as well as providing duplicate method calls for each changed method signature. So I would then have a plain old clr object for each version of my api, which again seems undesirable. And even if I do this, I surely won't be building each object from scratch as that would end up with vast amounts of duplicated code. Rather, the API is likely to extend the private objects we are using for our base API, but then we run into the same problem because added properties would also be available in the public API when they are not supposed to be. So what is some sanity that is usually applied to this situation? I know many public services such as Git for Windows maintains a versioned API, but I'm having trouble imagining an architecture that supports this without vast amounts of duplicate code covering the various versioned methods and input/output objects. I'm aware that processes such as semantic versioning attempt to put some sanity on when public API breaks should occur. The problem is more that it seems like many or most changes require breaking the public API if the objects aren't more separated, but I don't see a good way to do that without duplicating code.

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  • Why is CS never a topic of conversation of the layman? [closed]

    - by hydroparadise
    Granted, every profession has it's technicalities. If you are an MD, you better know the anatomy of the human body, and if you are astronomer, you better know your calculus. Yet, you don't have to know these more advance topics to know that smoking might give you lung cancer because of carcinogens or the moon revolves around the earth because of gravity (thank you Discovery Channel). There's sort of a common knowledge (at least in more developed countries) of these more advanced topics. With that said, why are things like recursive descent parsing, BNF, or Turing machines hardly ever mentioned outsided 3000 or 4000 level classes in a university setting or between colleagues? Even back in my days before college in my pursuit of knowledge on how computers work, these very important topics (IMHO) never seem to get the light of day. Many different sources and sites go into "What is a processor?" or "What is RAM?", or "What is an OS?". You might get lucky and discover something about programming languages and how they play a role in how applications are created, but nothing about the tools for creating the language itself. To extend this idea, Dennis Ritchie died shortly after Steve Jobs, yet Dennis Ritchie got very little press compared to Steve Jobs. So, the heart of my question: Does the public in general not care to hear about computer science topics that make the technology in their lives work, or does the computer science community not lend itself to the general public to close the knowledge gap? Am I wrong to think the general public has the same thirst for knowledge on how things work as I do? Please consider the question carefully before answering or vote closing please.

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  • Leveraging NuGet as a central repository for PowerShell modules

    - by cibrax
    We have been working a lot lately with PowerShell as part of our star product at Tellago Studios, “Moesion”. One of the main features we provide in Moesion is the ability to execute PowerShell commands remotely in a given server using a web mobile interface (You can read more in my previous post about Moesion). One of the things we realized in all this time is that PowerShell lacks of a central repository where IT guys or we, the developers, can easily grab and reuse commands.  All the commands or modules are basically spread across multiple places or websites, like personal blogs, TechNet or CodePlex projects to name a few making the search of them very hard. You are usually limited to use your favorite search engine and copy what you find. In addition, there is not an easy way to reuse, extend or version these commands, which also limits any contribution that you could make to the community.  My friend Jose wrote a great post the other day about the importance of reusing PowerShell modules, and what is the mechanism to reuse them. Jose, however, based his post in a custom implementation using a GIT repository for storing the modules. We have NuGet in the .NET platform for sharing and reusing existing libraries or code, so why can’t just leverage it for reusing PowerShell modules as well ?. Some teams in Microsoft are using NuGet for distributing libraries and binaries so it would be a great thing for all of us if they also distribute the scripting interfaces in PowerShell using NuGet. This applies to the .NET OS community as well. In fact, it looks like Andrew Nurse had the same idea and implemented a project for this in BitBucket, PsGet.

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  • What is the disadvantage of using abstract class as a database connectivity in zend framework 2 instead of service locator

    - by arslaan ejaz
    If I use database by creating adapter with drivers, initialize it in some abstract class and extend that abstract class to required model. Then use simple query statement. Like this: namespace My-Model\Model\DB; abstract class MysqliDB { protected $adapter; public function __construct(){ $this->adapter = new \Zend\Db\Adapter\Adapter(array( 'driver' => 'Mysqli', 'database' => 'my-database', 'username' => 'root', 'password' => '' )); } } And use abstract class of database like this in my models: class States extends DB\MysqliDB{ public function __construct(){ parent::__construct(); } protected $states = array(); public function select_all_states(){ $data = $this->adapter->query('select * from states'); foreach ($data->execute() as $row){ $this->states[] = $row; } return $this->states; } } I am new to zend framework, before i have experience of working in YII and Codeigniter. I like the object oriented in zend so i want to use it like this. And don't want to use it through service locater something like this: public function getServiceConfig(){ return array( 'factories' => array( 'addserver-mysqli' => new Model\MyAdapterFactory('addserver-mysqli'), 'loginDB' => function ($sm){ $adapter = $sm->get('addserver-mysqli'); return new LoginDB($adapter); } ) ); } In module. Am i Ok with this approach?

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