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Fabien Cadet

Service Oriented Agony | 8th Light, 2012-02-01 by Bob Martin - 7 views

blog.8thlight.com/...Service-Oriented-Agony.html

software architecture SOA pitfalls

shared by Fabien Cadet on 23 Feb 12 - No Cached
  • The structure seems obvious to system designers who have grown tired of single monolithic systems and want to break those systems up into components and services. What could be more natural than to break the system along the lines of data base managment?
  • Unfortunately this is a huge violation of the Single Responsibility Principle — or its big brother the Common Closure Principle.
  • These principles tell us to group together things that change together, and keep apart things that change for different reasons.
  • ...6 more annotations...
  • When you separate things that change for the same reasons, you have to make changes in many different places in the system.
  • So it’s a lot of work just to get anything working.
  • Moreover, when you group together things that change for different reasons, you expose the components of the system to collateral damage, thrashing, CM collisions, and a whole host of other problems.
  • So what’s the solution? First of all, I question whether the system needed to be partitioned into services.
  • Services are expensive and complicated, you should only create them if you absolutely need to. It’s always easier to live in a single process. Remember Martin Fowler’s first law of distributed objects: Don’t distribute your objects.
  • Many systems could be streamlined, and development made much faster, if the system designers paid more attention to the Single Responsibility Principle.
Joel Bennett

PowerToys for the Class Designer and Distributed System Designer - CodePlex - 0 views

www.codeplex.com/modeling

Development VSAddins PowerToys Designers

shared by Joel Bennett on 14 Dec 08 - Cached
  • Joel Bennett on 14 Dec 08
     
    Provides a common set of features for the Class Designer and Distributed System Designers, such as pan/zoom window and rich formatting commands, HTML export and nested type creation commands...
Vincent Tsao

Asterisk at Home or Asterisk at Work in 30 MINUTES :: AsteriskNOW | - 0 views

www.asterisknow.org

opensource linux asterisknow

shared by Vincent Tsao on 05 Nov 08 - Cached
  • Vincent Tsao on 05 Nov 08
     
    Asterisk® in minutes. AsteriskNOW is an open source Software Appliance; a customized Linux distribution that includes Asterisk (the leading open source telephony engine and tool kit), the AsteriskGUI™, and all other software needed for an Asterisk system. AsteriskNOW is easy to install, and offers flexibility, functionality and features not available in advanced, high-cost proprietary business systems.
Joel Bennett

Why You Should Switch from Subversion to Git -- Carsonified - 0 views

carsonified.com/...-switch-from-subversion-to-git

Development version-control SourceControl SVN git comparison introduction

shared by Joel Bennett on 14 Sep 09 - Cached
  • Joel Bennett on 14 Sep 09
     
    "You may want to give it a second look. Not just at distributed version control systems, but at the real role of version control in your creative toolkit. In this article, I'm going to introduce you to Git, my favorite DVCS, and hopefully show you why it is not only a better version control system than Subversion, but also a revolutionary way to think about how you get your work done."
Paris Polyzos

Application Request Routing : The Official Microsoft IIS Site - 0 views

www.iis.net/...applicationrequestrouting

iis arr distributed systems

shared by Paris Polyzos on 11 Aug 10 - Cached
  • rules based on the URL, HTTP headers, and server variables to determine the most appropriate Web application server for each request
  • ARR enable hosting providers to route requests from clients to specific Web application servers in a server farm by creating an affinity between the client and server.
  • They can easily add or remove servers from a server farm to match demand throughput without impacting application availability
  • ...5 more annotations...
  • ARR is able to cache on disk any HTTP traffic that passes through the server
  • hierarchy of IIS Web servers running ARR, CDNs and hosting providers are able to considerably reduce the network traffic that traverses up to the origin server.
  • Health monitoring
  • Disk-based caching
  • Warming up cache mode
  • Paris Polyzos on 11 Aug 10
     
    enables Web server administrators, hosting providers, and Content Delivery Networks (CDNs) to increase Web application scalability and reliability through rule-based routing, client and host name affinity, load balancing of HTTP server requests, and distributed disk caching
Joel Bennett

WiX Documentation - What is WiX, how to use it, and how to extend it. - 0 views

coolthingoftheday.blogspot.com/...-vs2010-document-ctp-what.html

Development VS2010 Installers WIX

shared by Joel Bennett on 26 Feb 09 - Cached
  • Joel Bennett on 26 Feb 09
     
    This documentation contains information about the version of WiX distributed with Visual Studio Team System code name "Rosario" November CTP. It contains information about: * What WiX is * Using WiX on the command line * Using WiX in Visual Studio * WiX Schema Reference * Advanced WiX Usage such as patch building, custom actions, and extensions * Additional help links and resources
Fabien Cadet

Herbert Simon - Wikipedia (en) - 2 views

en.wikipedia.org/...Herbert_Simon

CS AI sociology

shared by Fabien Cadet on 19 Sep 11 - Cached
  • Fabien Cadet on 19 Sep 11
     
    « Simon was among the founding fathers of several of today's important scientific domains, including artificial intelligence, information processing, decision-making, problem-solving, attention economics, organization theory, complex systems, and computer simulation of scientific discovery. He coined the terms bounded rationality and satisficing, and was the first to analyze the architecture of complexity and to propose a preferential attachment mechanism to explain power law distributions. »
florinamissah

Collaborative Program Management System - 0 views

www.slideshare.net/...cpms-49299562

Web Development Company India

shared by florinamissah on 12 Jun 15 - No Cached
  • florinamissah on 12 Jun 15
     
    Pratham Vision Collaborative project management system company is a method used to plan, coordinate, control, and monitor distributed and complex projects. It enables project experts teams to collaborate across departmental, corporate, and national boundaries and to master growing project complexity.
David Corking

Dr. Dobb's | Smartphone Operating Systems: A Developer's Perspective | March 30, 2009 - 0 views

www.ddj.com/...printableArticle.jhtml

Cellular phones PDA symbian iphone

shared by David Corking on 11 May 09 - Cached
  • The industry stewards have countered Apple's move with their own application stores, so there's a huge opportunity to write the "killer app" for one of several smartphone platforms.
  • 40 MB to less than 4 MB of free RAM
  • one-app-at-a-time requirement complicates any implementation of a copy-and-paste mechanism.
  • ...45 more annotations...
  • As a security sandbox, the iPhone OS permits only one third-party application to run at a time, and not in the background.
  • adding some useful Bluetooth profiles that supported stereo headsets, data synchronization, or the ability to implement multiplayer games would be usefu
  • iPhone OS 3, that provides some of the missing features mentioned here, such as the A2DP profile for Bluetooth, voice recording, and copy-and-paste.
  • Have to learn Objective-C; is only smartphone platform that uses it.
  • Competitors will soon catch up on the UI.
  • embed navigation and GPS plotting into applications.
  • provide their own map content
  • The OS now supports the use of accessories connected to the iPhone either through its 30-pin docking connector or wirelessly via Bluetooth. Now that the device has been "opened", you can expect an entire ecosystem to build up around the device, much like the iPod has.
  • peer-to-peer connectivity using Bonjour
  • developers can now allow users, from within the application, to purchase and obtain new content
  • No voice dial.
  • A client-server mechanism provides access to low-level system resources, and in fact the kernel itself is a server that parcels out resources to those applications that need them. This transaction scheme allows applications to exchange data without requiring direct access to the OS space.
  • C/C++ for porting existing UNIX applications, and Java to port Java ME MIDlets. As mentioned previously, the software stack offers several run-times that offer application development using WRT widgets, Flash, and Python. The primary programming language for the platform is Symbian C++,
  • Handango has managed the wide-scale distribution of Nokia applications. In February, Nokia announced plans to launch its Ovi Store, which sells applications, videos, games, pod-casts and other content, similar to Apple's App Store. The store will be accessible by Nokia S60 smartphones in May.
  • Non-standard Symbian C++ has steep learning curve, with special idioms to master. Large number of Symbian APIs to learn, since it contains hundreds of classes and thousands of member functions.
  • BlackBerry Device Software executes multiple applications simultaneously
  • Manages multiple e-mail Exchange e-mail accounts, along with support for POP3 and SMTP, and e-mails can have file attachments
  • FIPS 140-2 compliant, and supports AES or Triple DES encryption sessions via BlackBerry Enterprise Servers
  • BlackBerry Device Software has enhanced the capabilities of the platform with its own Java virtual machine (JVM), along with new Java classes that offer multitasking capabilities and UI enhancements to go beyond the capabilities of Java ME.
  • You can also take existing Java ME code and add specific BlackBerry classes to make a hybrid Java ME application
  • don't intermix MIDP 2.0 and BlackBerry API calls that perform either screen drawing or application management.
  • The catch to writing an application that uses BlackBerry API extensions is that it ties the application this smartphone. However, this is no worse than using the unique Java classes found in Google's Android.
  • Apple promotes the design goal that applications should accomplish one purpose.
  • no Flash support, and you can't download files.
  • For non-Exchange users, Apple's MobileMe online service, after some fits and starts in 2008, now supports the push of e-mails and changes to the calendar and contacts.
  • The iPhone 3G can work in tandem with Microsoft Exhange Server 2003 and 2007 to support enterprise operations.
  • Cocoa Touch is a subset of Apple's Cocoa,
  • Cocoa Touch components manage most of the writing to the screen and playing media, yet there are APIs exposed that let you access the accelerometer and camera.
  • Quartz engine is identical to the one found in Mac OS X
  • Only a select few higher-level frameworks have access to the kernel and drivers. If necessary, an application can indirectly access some of these services through C-based interfaces provided in a LibSystem library.
  • the SDK provides Dashcode, which is a framework based on a Web page composed of HTML and Javascript. You can use DashCode's simulator to write and test your web application. You can also use several other third-party frameworks to write web applications, and debug these with Aptanna Studio's tools.
  • Made by HTC, the G1 is the first smartphone using the Android platform.
  • e-mail program (which makes use of Google's Gmail), a mapping program (using the company's Google Maps), and a browser that uses WebKit, not Google's Chrome web browser
  • Android is not Java ME, nor does it support such applications
  • ability to both browse and manage multiple IM conversations. On the other hand, such heavy use of the smartphone's CPU shortens battery life significantly. Maybe Apple is on to something in limiting the number of applications that the platform can run.
  • On the positive side, the Android APIs support a touch interface (and the G1 has a capacitive touch screen), but not any multi-touch gestures.
  • copying text from the web pages is the browser isn't allowed
  • The advantage to Android's use of a different bytecode interpreter is that the DVM was designed so that multiple instances of it can run, each in their own protected memory space, and each executing an application. While this approach offers stability and a robust environment for running multiple applications, it does so at the expense of compatibility with Java ME applications.
  • Seasoned Java programmers will find the Android SDK an amalgam of Java SE and Java ME methods and classes, along with unique new ones
  • compile the Java code to generate Dalvik bytecode files, with an extension of .dex. These files, along with the manifest, graphics files, and XML files, are packaged into an .apk file that is similar to a Java JAR file.
  • The certificate that you use to generate the private key does not require a signing authority, and you can use self-signed certificates for this purpose.
  • The Developer Phone provides access to a shipping Android device without the cash outlay or contract contortions required when developing for the other platforms.
  • in February the site began supporting priced applications. Google allows developers to take seventy percent of the proceeds.
  • it's possible that you might pick up a malicious application before it is detected by the user community.
  • Open source, open platform: if you hate the mail program, some third-party is writing a better one.
  • David Corking on 11 May 09
     
    Lengthy developer's overview of Symbian, Mac OS X iPhone, Blackberry, Android. This talks about the leading app platforms except Java ME and Windows Mobile, though it does explain how Blackberry and Symbian support Java ME.
htmlslicemate.com

Say Hello to PowerShell - 0 views

net.tutsplus.com/...say-hello-to-powershell

tutorial design

shared by htmlslicemate.com on 06 Jun 13 - No Cached
  • htmlslicemate.com on 06 Jun 13
     
    PowerShell is Microsoft's task automation framework, consisting of a command-line shell, an integrated scripting environment (ISE), a scripting language built on .NET Framework, an API allowing you to host PowerShell in your .NET applications, and it is a distributed automation platform. PowerShell provides full access to COM and WMI, enabling you to perform tasks on both local and remote Windows systems. PowerShell is a new breed platform for automation, in that it solves administration and adaptability challenges by seamlessly integrating the .NET Framework. It's good for developers, administrators, testers and more. Based on .NET, the tool drives down costs, while providing developers and administrators a simple and enterprise-ready way to automate, measure and improve all of their processes.
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