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Oracle GoldenGate 11g Certified Implementation Beta Exam Available

- by Irem Radzik

We have great news for Oracle Data Integration partners: Oracle GoldenGate 11g Certified Implementation Beta Exam is now available. The Oracle GoldenGate 11g Certified Implementation Exam Essentials (1Z1-481) exam is designed for individuals who possess a strong foundation and expertise in selling and implementing Oracle Data Integration 11g solutions. This certification covers topics such as: Oracle GoldenGate 11g Overview Architecture Overview, Configuring Oracle GoldenGate Parameters, Mapping and Transformation Overview, Configuration Options, Managing and Monitoring Oracle GoldenGate 11g. This certification helps OPN members differentiate themselves in the marketplace through proven in-depth expertise and helps their partner company qualify for the Oracle Data Integration 11g Specialization Criteria. We recommend up-to-date training and field experience. OPN members earning this certification will be recognized as OPN Certified Specialists. Request a discounted beta voucher today using the OPN Beta Certified Specialist Exam Voucher Request Form. You can take the exam now at a near-by Pearson VUE testing center.

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Unlock the Java EE 6 Platform using NetBeans 7.1

- by arungupta

NetBeans IDE provide tools, templates, and code generators that can be used for the specifications that are part of the Java EE 6 Platform. In a recent article Geertjan builds a simple end-to-end application using the standard Model-View-Controller architecture. It uses Java Persistence API 2, Servlets 3, JavaServer Faces 2, Enterprise Java Beans 3.1, Context and Dependency Injection 1.0, and Java API for RESTful Web Services 1.1 showing the complete stack. A self-paced and an extensive hands-on lab covering this article and much more is also available here. A video (47-minutes) explaining how to build a similar application can be viewed here.

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Software design methods for Java or any other programming language

- by IkerB

I'm junior programmer and I would like to know how professionals write their code or which steps they follow when they are creating new software. I mean, which steps they follow, which programming methodology, software architecture design application software, etc. I would like to find a tutorial where they explain from the beginning which steps I have to follow from The Idea I have in my mind to the final version of the application in any language. Or perhaps how is your programming steps or rules that you used to follow. Because everytime I want to create the an application I spend few time on the design and a lot of time coding (I know, that's not good).

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How important is using the same language for client and server?

- by Makita

I have been evaluating architecture solutions for a mobile project that will have a web-service/app in addition to native apps and have been looking at various libraries, frameworks, and stacks like Meteor, this being a sort of "open stack package framework", is tightly bound with Node.js. There is a lot of talk about the benefits of using the same language both client and server side, and I'm not getting it. I could understand if you want to mirror the entire state of a web application on both client and server but struggling to find other wins... Workflow efficiency? I'm trying to understand why client/server language parity is considered to be a holy grail. Why does client/server language parity matter in software development?

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The November 12 Edition is Here - Oracle Virtualization Newsletter

- by Chris Kawalek

We are pleased to announce the November 2012 edition of the Oracle Virtualization newsletter is now ready for you to read! It has a shiny new look and lots of great content, including: Oracle OpenWorld 2012 highlights and videos Advanced I/O Virtualization Architecture for Consolidating High-Performance Workloads video What's New in Oracle Secure Global Desktop 4.7 video Self-paced Oracle VM hands on labs news Information on the Oracle VM Storage Connect Plug-in For NetApp Storage Webcasts, white papers, events, and more... Read the November edition here. Subscribe now.

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Direct X-forwarding

- by Sean Houlihane

I'm struggling to set up X-forwarding between 2 different machines on my local network and my ubuntu desktop. I'm able to connect using ssh x-forwarding one one machine, but the other machine (a Qnap TS-219P II) seems to have a less functional build of SSH on it, and I'd rather use a simpler approach. I've set $DISPLAY, and done 'xauth list $DISPLAY' on the desktop, then 'xauth add ' on the remote machine. From the remote machine, I just get xterm xterm Xt error: Can't open display: 192.168.0.4:0.0 Now, oddly, if I connect via ssh -X, there is a different magic cookie for the tunnelled port (but neither seems to work). I'm wondering if there is a port which needs to be enabled to permit X connections from the LAN? If so, how? The proper solution might be to re-build all the packages which are preventing X-forwarding from working on my QNAP machine, but lets assume for the purposes of this question that I've tried building enough packages on that architecture already and want to run X without the overhead of encryption.

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Repacked proprietary software keeps updating the same deb

- by Johannes

I repacked a proprietary program delivered as tar file to a deb file for having a company wide repository. I used reprepro to set up a repository and signed it. A unix timestamp is faking a versioning numbering, so I can have different (real) versions installed at the same time. Almost everything works as expected. The deb file looks like this: mysoft8.0v6_1366455181_amd64.deb Only problem on a client machine it tries to install the same deb file over and over again because it thinks its an update. What do I miss: control file in deb package looks like this: Package: mysoft8.0v6 Version: 1366455181 Section: base Priority: optional Architecture: amd64 Installed-Size: 1272572 Depends: Maintainer: me Description: mysoft 8.0v6 dpkg repackaging and the config in the repository: /mirror/mycompany.inc/conf/distributions: Origin: apt.mycompany.inc Label: apt repository Codename: precise Architectures: amd64 i386 Components: main Description: Mycompany debian/ubuntu package repo SignWith: yes Pull: precise Help much appreciated Added guide: This Is the guide I used to create the repository.

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AngularJS: structuring a web application with multiple ng-apps

- by mg1075

The blogosphere has a number of articles on the topic of AngularJS app structuring guidelines such as these (and others): http://www.johnpapa.net/angular-app-structuring-guidelines/ http://codingsmackdown.tv/blog/2013/04/19/angularjs-modules-for-great-justice/ http://danorlando.com/angularjs-architecture-understanding-modules/ http://henriquat.re/modularizing-angularjs/modularizing-angular-applications/modularizing-angular-applications.html However, one scenario I have yet to come across for guidelines and best practices is the case where you have a large web application containing multiple "mini-spa" apps, and the mini-spa apps all share a certain amount of code. I am not referring to the case of trying to have multiple ng-app declarations on the same page; rather, I mean different sections of a large site that have their own, unique ng-app declaration. As Scott Allen writes in his OdeToCode blog: One scenario I haven't found addressed very well is the scenario where multiple apps exist in the same greater web application and require some shared code on the client. Are there any recommended approaches to take, pitfalls to avoid, or good sample structures of this scenario that you can point to?

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Java web UI framework like ASP.NET MVC?

- by Ethel Evans

I'm doing some web apps for personal projects that might be shared out with my friends. I'm trying to use skills that will help me at work, but don't have $$ to spend on Visual Studio right now and don't want to try to cobble something together with Express Editions. Since I've been sort of wanting to bring my Java skills up to date and the main skills I want to work on are design and architecture skills, this isn't a big deal - except that I have no idea how to track down the right UI framework. I know I want something based on MVC, to get more practice with frameworks for that design pattern (we're using ASP .NET MVC2 at work). The UIs that I'll be making will be pretty simple - data entry, buttons, text, images. They will need AJAX. Any thoughts about which frameworks to look at? I'll be watching the comments, if anyone wants additional clarification on what I'm looking for.

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How do I resize my emacs22 window?

- by Evan

I tried searching for answers but can't find any. I'm running Ubuntu 10.04 LTS and have emacs22 installed: ii emacs22 22.2-0ubuntu9 The GNU Emacs editor (Emacs 22) ii emacs22-bin-common 22.2-0ubuntu9 The GNU Emacs editor's shared, architecture dependent file ii emacs22-common 22.2-0ubuntu9 The GNU Emacs editor's common infrastructure ii emacsen-common 1.4.19ubuntu1 Common facilities for all emacsen I find that I cannot resize the outer frame (X window) of the emacs session. When I move the mouse to the corner of the window, it doesn't change into the resize icon.... help!

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Logic in Entity Components Systems

- by aaron

I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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IBM simule le cerveau d'un singe avec son supercalculateur Blue Gene/Q qui a émulé 530 milliards de neurones

IBM simule le cerveau d'un singe avec son supercalculateur Blue Gene/Q qui a émulé 530 milliards de neurones IBM vient de réaliser de nouvelles prouesses dans le domaine de l'intelligence artificielle. La division de recherche de la société a simulé avec succès 530 milliards de neurones dans un réseau basé sur le modèle CoCoMac (connectivité structurelle dans le cerveau d'un singe). Le système est basé sur le supercalculateur IBM Blue Gene/Q du laboratoire de recherche Livermore Lawrence. Ce système comprend 1 024 « compute nodes » par armoire et 17 noyaux de processus par « compute nodes », reposant sur l'architecture IBM TrueNorth Cognitive Computing. Le...

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How to install packages which apt-get can't find?

- by newcomer

Hi, I need these packages to build Android source. But I am getting this error: $ sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev [sudo] password for asdf: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libc6-dev-i386 E: Unable to locate package lib32ncurses5-dev E: Unable to locate package ia32-libs E: Unable to locate package lib32readline5-dev E: Unable to locate package lib32z-dev I tried to download & install say libc6-dev-i386 debian package form here. But when I double click on the .deb file Ubuntu Software Manager says wrong architecture 'amd64'. (My OS: Ubuntu 10.10 (updated), Processor: AMD phenom II.)

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Chicago Architects Group – Document Generation Architectures

- by Tim Murphy

Thank you to everyone who came out to the Chicago Architects Group presentation last night. It seemed like the weather has a way of keeping a large portion of the people who registered from making the meeting. There was some lively networking going on before and after the meeting. I enjoyed the questions that people had during the presentation. It helped to bring out some of the challenges with dealing with the OOXML and ODF standards from an architecture perspective. I have posted the Slides and Code. Feel free to contact me with any questions. For those of you who missed the presentation I will be giving a similar one at the Lake County .NET Users Group on June 24th. The next CAG presentation will be July 20th. The presentation will be Architecting A BI Installation by David Leininger. Look for the registration to open in the next day or so. del.icio.us Tags: Chicago architects Group,OOXML,ODF,BI,LCNUG,slides,code

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RPC protocols comparison

- by Ricardo

I have to select a protocol/technology to use for communicating a client-server architecture, with support both for Python and C. The main requirements are: Symmetrical communication in between ends: clients establish a connection and servers can send data back to clients through the same connection. Avoid excessive overhead by using HTTP or a big stack (if possible, TCP direct communication). TLS/SSL support for secure communications. Ease of implementation. For that, I evaluated the following protocols/communications technologies. Is the information on this table accurate and correct? (*1) TLS support for RPyC is based in a no-longer supported Python library.

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Webcast Series: Accelerate Business-Critical Database Deployments with Oracle Optimized Solutions

- by ferhat

Join us for this two-part Webcast series and learn how to safely consolidate business-critical databases and deliver quantifiable benefits to the business: Save up to 75% in operational and acquisition costs Save millions of dollars consolidating legacy infrastructure Leverage best practices from thousands of customer environments Increase end user productivity with 75% faster time to operations and 4x faster throughput The Oracle Optimized Solution for Oracle Database provides extensive guidelines for architecting and deploying complete database solutions that deliver superior performance and availability while minimizing cost and risk. Oracle’s world-class engineering teams work together to define these optimal architectures using Oracle's powerful SPARC M-Series and SPARC T-Series servers together with Oracle Solaris and Oracle's SAN, NAS, and flash-based storage to run the industry-leading Oracle Database. Quite simply, the Oracle Optimized Solution for Oracle Database makes it easier for you to deliver and manage business critical database environments that are fast, secure and cost-effective. Available On-Demand PART 1: Why Architecture Matters When Deploying Business-Critical Databases PART 2: How To Consolidate Databases Using Oracle Optimized Solutions Presented by: Lawrence McIntosh, Principal Enterprise Architect, Oracle Optimized Solutions Ken Kutzer, Principal Product Manager, Infrastructure Solutions, Oracle

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How Orchard works

I just finished writing a long documentation topic on the Orchard project wiki that aims at being a good starting point for developers who want to understand the architecture, structure and general philosophy behind the Orchard CMS. It is not required reading for anyone who only wants to write Orchard modules and themes but hopefully it will help people who want to evaluate the platform and start writing patches. Read it here: http://orchardproject.net/docs/How-Orchard-works.ashx...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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October 2012 Chicago IT Architects Group Meeting Recap

- by Tim Murphy

It seemed very ironic that the day we have a presentation on the architecture of building applications for Windows 8 the Surface tablet is opened for pre-order. Tom Benton started the evening enlightening the attendees on the user experience for those who had not seen it yet. He even passed around his table from last year’s Build conference for everyone to play with. This was followed with a tour of the capabilities and structures that make up a Windows Store App on Windows 8. Taking it to its conclusion, he rounded out the discussion by covering the certification and deployment process. As usual it was great to see a lot of familiar faces last night. We are always looking for more people to join in our discussions. Stay tuned here for announcements up upcoming meetings and topics. Also, if you have a topic you would like to present or see presented feel free to contact me through this blog. del.icio.us Tags: Chicago Information Technology Architects Group,CITAG,Winodws 8,Windows Store,Tom Benton

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Calling all developers building ASP.NET applications

- by Laila Lotfi

We know that developers building desktop apps have to contend with memory management issues, and we’d like to learn more about the memory challenges ASP.NET developers are facing. To be more specific, we’re carrying out some exploratory research leading into the next phase of development on ANTS Memory Profiler, and our development team would love to speak to developers building ASP.NET applications. You don’t need to have ever used ANTS profiler – this will be a more general conversation about: - your current site architecture, and how you manage the memory requirements of your applications on your back-end servers and web services. - how you currently diagnose memory leaks and where you do this (production server, or during testing phase, or if you normally manage to get them all during the local development). - what specific memory problems you’ve experienced – if any. Of course, we’ll compensate you for your time with a $50 Amazon voucher (or equivalent in other currencies), and our development team’s undying gratitude. If you’d like to participate, please just drop me a line on [email protected].

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PHP API to trade products from eshop through REST/xml

- by Donatas Veikutis

I need algorithm, or PHP api example, or existing decision how to make system for trade big information for B2B xml with goods information. Now I try to use Slim framework to do that system. But for me need some documentation what architecture have to be in here. System requiments is simple: User have autentification username and password Then he can see which product groups assigned to it Then he can see all product with information (price, title, description, images, specifications etc.). Its will the easiest way to get a free php api for that I think, and try too edit some code. But I did not found anything.

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How much server bandwidth does an average RTS game require per month?

- by Nat Weiss

My friend and I are going to write a multiplayer, multiplatform RTS game and are currently analyzing the costs of going with a client-server architecture. The game will have a small map with mostly characters, not buildings (think of DotA or League of Legends). The authoritative game logic will run on the server and message packet sizes will be highly optimized. We'd like to know approximately how much server bandwidth our proposed RTS game would use on a monthly basis, considering these theoretical constants: 100 concurrent users maximum 8 players maximum per game 10 ticks per second Bonus: If you can tell us approximately how much server RAM this kind of game would use that would also help a great deal. Thanks in advance.

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Computer Networks UNISA - Chap 8 – Wireless Networking

- by MarkPearl

After reading this section you should be able to Explain how nodes exchange wireless signals Identify potential obstacles to successful transmission and their repercussions, such as interference and reflection Understand WLAN architecture Specify the characteristics of popular WLAN transmission methods including 802.11 a/b/g/n Install and configure wireless access points and their clients Describe wireless MAN and WAN technologies, including 802.16 and satellite communications The Wireless Spectrum All wireless signals are carried through the air by electromagnetic waves. The wireless spectrum is a continuum of the electromagnetic waves used for data and voice communication. The wireless spectrum falls between 9KHZ and 300 GHZ. Characteristics of Wireless Transmission Antennas Each type of wireless service requires an antenna specifically designed for that service. The service’s specification determine the antenna’s power output, frequency, and radiation pattern. A directional antenna issues wireless signals along a single direction. An omnidirectional antenna issues and receives wireless signals with equal strength and clarity in all directions The geographical area that an antenna or wireless system can reach is known as its range Signal Propagation LOS (line of sight) uses the least amount of energy and results in the reception of the clearest possible signal. When there is an obstacle in the way, the signal may… pass through the object or be obsrobed by the object or may be subject to reflection, diffraction or scattering. Reflection – waves encounter an object and bounces off it. Diffraction – signal splits into secondary waves when it encounters an obstruction Scattering – is the diffusion or the reflection in multiple different directions of a signal Signal Degradation Fading occurs as a signal hits various objects. Because of fading, the strength of the signal that reaches the receiver is lower than the transmitted signal strength. The further a signal moves from its source, the weaker it gets (this is called attenuation) Signals are also affected by noise – the electromagnetic interference) Interference can distort and weaken a wireless signal in the same way that noise distorts and weakens a wired signal. Frequency Ranges Older wireless devices used the 2.4 GHZ band to send and receive signals. This had 11 communication channels that are unlicensed. Newer wireless devices can also use the 5 GHZ band which has 24 unlicensed bands Narrowband, Broadband, and Spread Spectrum Signals Narrowband – a transmitter concentrates the signal energy at a single frequency or in a very small range of frequencies Broadband – uses a relatively wide band of the wireless spectrum and offers higher throughputs than narrowband technologies The use of multiple frequencies to transmit a signal is known as spread-spectrum technology. In other words a signal never stays continuously within one frequency range during its transmission. One specific implementation of spread spectrum is FHSS (frequency hoping spread spectrum). Another type is known as DSS (direct sequence spread spectrum) Fixed vs. Mobile Each type of wireless communication falls into one of two categories Fixed – the location of the transmitted and receiver do not move (results in energy saved because weaker signal strength is possible with directional antennas) Mobile – the location can change WLAN (Wireless LAN) Architecture There are two main types of arrangements Adhoc – data is sent directly between devices – good for small local devices Infrastructure mode – a wireless access point is placed centrally, that all devices connect with 802.11 WLANs The most popular wireless standards used on contemporary LANs are those developed by IEEE’s 802.11 committee. Over the years several distinct standards related to wireless networking have been released. Four of the best known standards are also referred to as Wi-Fi. They are…. 802.11b 802.11a 802.11g 802.11n These four standards share many characteristics. i.e. All 4 use half duplex signalling Follow the same access method Access Method 802.11 standards specify the use of CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) to access a shared medium. Using CSMA/CA before a station begins to send data on an 802.11 network, it checks for existing wireless transmissions. If the source node detects no transmission activity on the network, it waits a brief period of time and then sends its transmission. If the source does detect activity, it waits a brief period of time before checking again. The destination node receives the transmission and, after verifying its accuracy, issues an acknowledgement (ACT) packet to the source. If the source receives the ACK it assumes the transmission was successful, – if it does not receive an ACK it assumes the transmission failed and sends it again. Association Two types of scanning… Active – station transmits a special frame, known as a prove, on all available channels within its frequency range. When an access point finds the probe frame, it issues a probe response. Passive – wireless station listens on all channels within its frequency range for a special signal, known as a beacon frame, issued from an access point – the beacon frame contains information necessary to connect to the point. Re-association occurs when a mobile user moves out of one access point’s range and into the range of another. Frames Read page 378 – 381 about frames and specific 802.11 protocols Bluetooth Networks Sony Ericson originally invented the Bluetooth technology in the early 1990s. In 1998 other manufacturers joined Ericsson in the Special Interest Group (SIG) whose aim was to refine and standardize the technology. Bluetooth was designed to be used on small networks composed of personal communications devices. It has become popular wireless technology for communicating among cellular telephones, phone headsets, etc. Wireless WANs and Internet Access Refer to pages 396 – 402 of the textbook for details.

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How do I customize the Unity launcher for different workspaces?

- by Srijan

How do I customize the Unity launcher for different workspaces for Ubuntu 12.04? I am using x86-64 bit architecture running solely Ubuntu 12.04. I have searched in the community for possible aspects of this question as per the link Different Launchers for Different Workspaces? but the links provided in this doesn't address my issue as the links are outdated and it does not exactly say how to customize the launcher. Besides the environment is now buzzing with unity 5.4 and also Ubuntu 12.10. So can someone please help me to customize the unity launcher for Ubuntu 12.04 for different workspaces? Thanks a zillion in advance. Is there any features enabling customization of launcher in different workspaces in unity 5.4?

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Using a back-end mechanism to copy files to DB and notify the application

- by BDotA

This Scenario: User copies large files to a local folder. I want to watch that folder and when a new file is dropped then go and copy it to Database, so later when coping is done I can actually use it in my application. ( A C# WinForms App). It would be awesome to also find a way to somehow get notified in the Application that hey copying the file to DB is finished and ready for use... I am using C#.net, Windows... What solutions/architecture do you suggest for this? For example having a windows service running all the time watching that folder, when something copied goes and write it to DB ... then how about getting notified? MSMQ is something I can use? don't know much about it yet. Thanks.

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ADF EMG at Oracle Open World 2012: Forms to FMW

- by ultan o'broin

A super menu of sessions from the Oracle Application Development Framework Enterprise Methodology Group (that's ADF EMG to the rest of you) folks is now lined up for Oracle Open World 2012 (OOW12). These sessions fall under the category of "The Year After the Year of the ADF Developer" and cover everything for developers of enterprise apps with the Oracle toolkits, be they coming from an Oracle Forms background or on Oracle Fusion Middleware (FMW). Sessions also explain the architecture, building and deployment of Oracle Application Development Framework (ADF) apps. Anyone interested in developing enterprise applications with ADF should be beating a path to these now. Guaranteed rock star developer (and wannabe) stuff! A great return on investment for your attendance at OOW12. See you there!

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