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  • Introducing the ADF Desktop Integration Troubleshooting Guide

    - by Juan Camilo Ruiz
    Since the addition of ADF Desktop Integration to the ADF Framework, a number of customers internal and external, have started extending their applications in use cases around integration with MS Excel. In an effor to share the knowledge collected since the product came out, we are happy to launch the ADF Desktop Integration Troubleshooting Guide, where usera can find an active collection of best practices to figuring out how to best approach issues while using ADF Desktop Integration. Be sure to bookmark this link and make sure to check it out, plenty of scenarios are covered and more will be added as we continue identifying them. 

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  • Minimal set of critical database operations

    - by Juan Carlos Coto
    In designing the data layer code for an application, I'm trying to determine if there is a minimal set of database operations (both single and combined) that are essential for proper application function (i.e. the database is left in an expected state after every data access call). Is there a way to determine the minimal set of database operations (functions, transactions, etc.) that are critical for an application to function correctly? How do I find it? Thanks very much!

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  • Mysql my.cnf as simbolic link in Ubuntu 12.04

    - by Juan Cruz
    I am not able to use symlink for my.cnf file (Ubuntu 12.04 server). I added the alias to /etc/apparmor.d/tunables/alias file (as I did for 10.04 and worked) but I get: May 30 16:00:01 ip-10-242-209-203 kernel: [176926.213403] type=1400 audit(1338393601.350:244): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/mysqld" name="/opt/data/my.cnf" pid=18128 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 May 30 16:00:01 ip-10-242-209-203 kernel: [176926.222016] init: mysql main process (18128) terminated with status 1 May 30 16:00:01 ip-10-242-209-203 kernel: [176926.222084] init: mysql respawning too fast, stopped As a workaround I added the following line /etc/mysql/my.cnf r, to the /etc/apparmor.d/local/usr.sbin.mysqld file. The default configuration is /etc/mysql/*.cnf r, Is this a bug? is an apparmor bug or a mysql bug? It seems that that configuration has changed since MySql 5.1 (https://bugs.launchpad.net/ubuntu/+source/mysql-5.1/+bug/619172) but now worked for me. Thanks!

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  • Recommended Approach to Secure your ADFdi Spreadsheets

    - by juan.ruiz
    ADF desktop integration leverages ADF security to provide access to published spreadsheets within your application. In this article I discussed a good security practice for your existing as well as any new spreadsheets that you create. ADF Desktop integration uses the adfdiRemoteServlet to process and send request back and fort from and to the ADFmodel which is allocated in the Java EE container where our application is deployed. In other words this is one of the entry points to the application server. Having said that, we need to make sure that container-based security is provided to avoid vulnerabilities. So what is needed? For existing an new ADFdi applications you need to create a Security Constraint for the ADFdi servlet on the Web.xml file of our application. Fortunately JDeveloper 11g provides a nice visual editor to do this. Open the web.xml file and go to the security category Add a new Web Resource Collection give it a meaningful name and on the URL Pattern add /adfdiRemoteServlet click on the Authorization tab and make sure the valid-users  role is selected for authorization and Voila! your application now is more secured.

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  • Indicator-cpufreq does not work at 12.04 ¿infinite loop insaid?

    - by Juan
    Good night, i want to use indicator-cpufreq, but it is not possible, i think that when i start it, i get an infinite loop and it doesnt start I think i am doing it well, here you have a snapshoot when i try to start it http://i.stack.imgur.com/mvaYf.jpg But 6 or 7 minutes later, it continues at the same point, i have to stop it with Ctrl-c, and shows that: http://i.stack.imgur.com/Vi0pp.jpg It says:" Traceback (most recent call last): File "/usr/bin/indicator-cpufreq", line 82, in gtk.main() KeyboardInterrupt" I do not have idea of what do for fix that, i hope you can help me to do that Thanks for your time and sorry about my english

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  • JDeveloper 11g R1 (11.1.1.4.0) - New Features on ADF Desktop Integration Explained

    - by juan.ruiz
    One of the areas that introduced many new features on the latest release (11.1.1.4.0)  of JDeveloper 11g R1 is ADF Desktop integration - in this article I’ll provide an overview of these new features. New ADF Desktop Integration Ribbon in Excel - After installing the ADF desktop integration add-in and depending on the mode in which you open the desktop integration workbook, the ADF Desktop integration ribbon for design time and runtime are displayed as a separate tab within Excel. In previous version the ADF Desktop integration environment used to be placed inside the add-ins tab. Above you can see both, design time ribbon as well as runtime ribbon. On the design time ribbon you can manage the workbook and worksheet properties, worksheet component properties, diagnostics, execution and publication of the workbook. The runtime version of the ribbon is totally customizable and represents what it used to be the runtime menu on the spreadsheet, in this ribbon you can include all the operations and actions that could be executed by the end user while working with the spreadsheet data. Diagnostics - A very important aspect for developers is how to debug or verify the interactions of the client with the server, for that ADF desktop integration has provided since day one a series of diagnostics tools. In this release the diagnostics tools are more visible and are really easy to configure. You can access the client console while testing the workbook, or you can simple dump all the messages to a log file – having the ability of setting the output level for both. Security - There are a number of enhancements on security but the one with more impact for developers is tha security now is optional when using ADF Desktop Integration. Until this version every time that you wanted to work with ADFdi it was a must that the application was previously secured. In this release security is optional which means that if you have previously defined security on your application, then you must secure the ADFdi servlet as explained in one of my previous (ADD LINK) posts. In the other hand, if but the time that you start working with ADFdi you have not defined security, you can test and publish your workbooks without adding security. Support for Continuous Integration - In this release we have added tooling for continuous integration building. in the ADF desktop integration space, the concept translates to adding functionality that developers can use to publish ADFdi workbooks as part of their entire application build. For that purpose, we have a publish tool that can be easily invoke from an ANT task such that all the design time workbooks are re-published into the latest version of the application building process. Key Column - At runtime, on any worksheet containing editable tables you will notice a new additional column called the key column. The purpose of this column is to make the end user aware that all rows on the table need to be selected at the time of sorting. The users cannot alter the value of this column. From the developers points of view there are no steps required in order to have the key column included into the worksheets. Installation and Creation of New Workbooks - Both use cases can be executed now directly from JDeveloper. As part of the Tools menu options the developer can install the ADF desktop integration designer. Also, creating new workbooks that previously was done through that convert tool shipped with JDeveloper is now automatic done from the New Gallery. Creating a new ADFdi workbook adds metadata information information to the Excel workbook so you can work in design time. Other Enhancements Support for Excel 2010 and the ADF components ready-only enabled don’t allow to change its value – the cell in Excel is automatically protected, this could cause confusion among customers of previous releases.

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  • Using Oracle ADF with Oracle E-Business Suite Webcast Nov 2

    - by Juan Camilo Ruiz
    If you are using Oracle ADF with Oracle E-Business Suite or ar thinking on embarking on a project with these two technologies - make sure you mark your calendar for this coming Friday, November 2nd at 8.00 a.m. PST. Sara Woodhull, Siva Puthurkattil from Lake County Illinois and I will be having a re-run of the session we delivered at Oracle OpenWorld, but this time on a Webcast. All the information on how to register and access the dial-in information is available from the Oracle E-Business Suite ATG team blog on the following link: https://blogs.oracle.com/stevenChan/entry/atg_live_webcast_november_2nd Don't miss this opportunity to learn! 

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  • E-Business Suite, ADF, Mobile and Eclipse: Oracle OpenWorld is Here!

    - by Juan Camilo Ruiz
    Oracle OpenWorld 2012 is around the corner! Lots of exciting news and content awaits for all attendees next week - the theme of my participation: ADF and E-Business Suite integration, together with ADF development in Oracle Enterprise Eclipse Package and JDeveloper.If you are coming to San Francisco and are a reader of this blog, you might be wondering what I'll be doing next week and also what should you attend? So, the following is the list of activities where I'll be participating or that I recommend you should not miss:First and foremost: On Thursday Oct. 4: Using Oracle ADF with Oracle E-Business Suite: The Full Integration View.  11.15 a.m - Moscone West 3003:  This is an emerging hot topic among both ADF and Oracle E-Business Suite Customers. In this session I'll be doing a presentation with Sara Woodhull from the Applications Technology Group (ATG) in Oracle E-Business Suite and Siva Puthurkattil from Lake County, Illinois. Sunday, Sept. 30:  I'll be hanging out at the ADF EMG User Day, learning directly from our users and Gurus. Monday, Oct. 1: Don't miss Chris Tonas's keynote for developers - at 10:45 am. Salon 8 at the Marriot - The Future of Development for Oracle Fusion—From Desktop to Mobile to Cloud. Then: At 12.15 p.m. Moscone West 3014 - Extend Oracle Fusion Apps to Tablets/Smartphones with Oracle Mobile Technology Followed by: At 1.45 p.m. Moscone West 3002/3004 -  Extend Oracle Applications to Mobile Devices with Oracle’s Mobile Technologies I'll be participating in a couple of Hands-On Labs: Build Mobile Applications for Oracle E-Business Suite 1:45 PM- Marriott Marquis - Salon 10A And: Introduction to ADF 3.15 p.m - Marrriott Marquis - Salon 3/4. Tuesday, Oct. 2: I'll be at the Oracle Enterprise Pack for Eclipse demo booth showing some nice demos on ADF development with Eclipse. Wednesday, Oct. 3: Mobile Apps for Oracle E-Business Suite with Oracle ADF Mobile and Oracle SOA Suite 10:15 AM - Moscone West - 3001. Let's have a beer at the Oracle ADF Developer Meetup. OTN Louge 4:30 p.,m - 5.30 p.m! Thursday, Oct. 4: After my session, come to experience ADF development in Eclipse at the Oracle ADF for Java EE Developers with Oracle Enterprise Pack for Eclipse HandsOn Lab 12.45 p,m - Marriot room 3/4. All the Oracle OpenWorld related sessions can be found here: ADF - http://goo.gl/eJFNi Mobile: http://goo.gl/mGoRM E-Business Suite: http://goo.gl/5NqMd

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  • Adding a Role to a Responsibility for Use with the Oracle E-Business Suite SDK for Java JAAS Implementation

    - by Juan Camilo Ruiz
    This new post on the series of ADF integration with Oracle E-Business Suite, was written by Sara Woodhull, Principal Product Manager on the Oracle E-Business Suite Applications Technology team. Based on a previous post of the series, a reader asked what to do if you have an existing responsibility assigned to lots of users, instead of the UMX role that the Oracle E-Business Suite SDK for Java JAAS Implementation requires.  It would be tedious to assign a new role directly to hundreds or thousands of users, so naturally we’d like to avoid that if possible. Most people don’t know this, but it’s possible to assign a UMX role to a responsibility in Oracle User Management. Once you do that, users with your responsibility will all inherit your UMX role automatically. You can then proceed with using your UMX role with JAAS for ADF. Here is how to assign a UMX role to a responsibility in Oracle E-Business Suite: In the User Management responsibility, go to the Roles & Role Inheritance page. Search for the responsibility you want. In the search results table, click the “View In Hierarchy” icon for your responsibility. Note that the codes for responsibilities start with FND_RESP, while the codes for roles start with UMX. In the Role Inheritance Hierarchy, click on the Add Node icon (green plus + ) for your responsibility. Now you will see what appears to be the same page again but it is a little different (note the text at the top telling you the role you select will be inherited…).  This time, either search or expand nodes until you find your custom UMX role.  Use the Quick Select to choose that role. You will be sent back to the first screen, where you should see a confirmation message at the top. On the same page you can verify that the custom UMX role is underneath the responsibility.  You may need to expand one or more nodes to see the UMX role under the responsibility. You might see some other roles that have been inherited as well. Now that your users have the UMX role, you can test that the UMX role is being passed through to your ADF application through the Oracle E-Business Suite SDK for Java JAAS feature. Happy coding!

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  • Ubuntu 12.04 - Brightness controls not working

    - by Juan Manuel Zolezzi Volpi
    Controls from "Brightness and Lock" were not working so I've tried a solution that involved changing grub, which I'm detailing below: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 #GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" After doing this, the brightness control dissapeared like you can see at http://screencloud.net/img/screenshots/6b90d56604b70cc749a632d0bc005a20.png Any ideas? Would love to be able to configure Brightness or even use apps like F.lux to regulate it automatically. Edit: I've modified the following line to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" and now the brightness controls are back, but whatever I change the brightness remains the same. Just in case I'm using Intel H77

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  • 3DS Max exporting too many vertexes for model

    - by Juan Pablo
    I have a sample model of a cube and a buddha downloaded from internet in 3ds format which I can load correctly into my program and view them without problem, but wanted to try and create my own model. I created a simple box mesh in 3ds max, and exported it as .3ds (Converted to mesh - export as .3ds) When inspecting the .3ds file with a hex viewer, I was expecting to see 8 vertexes and 12 faces declared (as the model I downloaded from internet). But what i found was that it listed 26 vertexes, and 12 faces! And when I try to load that file with my .3ds viewer, my parser isn't detecting the face block (0x4120), which is strange because it worked for other objects downloaded from internet. Do I have to set any special property in order to export a 3ds file with minimum vertexes and a vertex-index list?

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  • Web 2.0 Solutions with Oracle WebCenter 11g &ndash; Book Review

    - by juan.ruiz
    Recently I obtained a copy of the book Web 2.0 Solutions with Oracle Web Center 11g from Packt Publishing, right away I noticed that one of the authors of this book is a good and long time colleague of  mine Plinio Arbizu, whom I have joined for different developer events in Latin America in the past. In this entry you will find my review of the book. Chapter 1: What's Oracle WebCenter? Provides you with basic knowledge to understand the pieces of WebCenter and the role that these pieces play in the overall Oracle Fusion Middleware strategy. Chapter 2 and 3: Will guide you through installation process and set up instructions, required to start developing Web2.0 applications. The screenshots are very helpful. Chapter 4: The chapter will guide you through a series of steps for creating a basic HelloWorld application that uses ADF/Webservices/WebCenter framework to understand the relevant pieces that are part of the architecture in large Web2.0 solutions for WebCenter. One caveat on this chapter is that the use HTML in combination with ADF Faces is not a recommended practice, because in some cases (not in this one) HTML code generated by the components can conflict with existent HTML code place on the same page... so be careful. Chapter 5: Describes the basics to understand the usage of ADF Faces Rich Client Components, with templates and ADF Business components. Chapter 6: This chapter explains how to encapsulate, deploy and consume ADF UIs as JSR 168 portlets in a declarative way Chapter 7: Explains some of the WebCenter services and the different ways that these services can be integrated within WebCenter applications. Chapter 8: Goes over how to include a series of  WebCenter services provided out-of-the-box within applications. This chapter presents a simple and clear way of how to include RSS feeds, search capabilities, tagging and discussions using practical samples that are easy to follow. Chapter 9: Presents an important component of Oracle WebCenter - the composer. Through the composer and Oracle Metadata Services the composer adds all the functionality to perform end-user personalizations, which is a very common user case when working with portals. The concept is self-explanatory when running over the practice developed in this chapter. Chapter 10: Provides an introduction to WebCenter spaces, explaining common concepts about installation, administration (role creation, group creation, etc) and through a sample, the readers can put everything in practice on their own environments. Summary: This book would provide the reader with a fast start to work with Oracle WebCenter 11g  and its different components. In my opinion the book targets the developer audience, rather than the Portal type of audience, or content generator. For the readers of this book I recommend that to better understand the concepts discussed, first you need to understand the basics on Oracle Application Development Framework. Believe me you can thank me later!

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  • The New OEPE 12.1.1.2 is Out - ADF Development and More

    - by Juan Camilo Ruiz
    Yes you are reading it right. Having announced just last week the general availability of our OEPE release 12.1.1.1.1 which includes support for developing applications to the Oracle Cloud. Today we are happy to announce the release of OEPE 12c (12.1.1.2) which includes various improvements for Webservices policies and security, and new features for implementing ADF applications in Eclipse Juno (3.8.1 and 4.2.1) as well as, bug fixes for other areas of the product - all of the above on top of Oracle Cloud support from the previous release. Many of the new features on this release have been added based on the feedback that we got from the ADF community, so, many thanks to you all and please, keep them coming! The main new features for this release are: ADF Bindings support on Taskflow activities on the diagram. Support for multi-node tree component bidings. Automatic ID generation for ADF Faces components. Support drag-n-drop of components and bindings into the page outline in addition to the regular jsp editor. Improved Webservices policies and security.  You can download the new versión from here. Remenber that you can send us your feedback or post your questions on our forum on OTN The OEPE Team. 

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  • what is this juju status ERROR state

    - by JUAN CABALLERO
    after i do a juju bootstrap i wait until cloud init is finished. i get no juju and the following errors. ERROR state/api: websocket.Dial wss://b4exj.master:17070/: dial tcp 198.105.244.240:17070: connection timed out ERROR state/api: websocket.Dial wss://b4exj.master:17070/: dial tcp 198.105.244.240:17070: connection timed out now let me add that the b4exj.master does not reside at 198.105.244.240:17070 but at 10.x.x.x this is in ubuntu 12.04.4 MAAS 1.4 and juju 1.18 all 64bit non VM

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  • Announcement: New Tutorial - Using ADF Faces and ADF Controller with OEPE

    - by Juan Camilo Ruiz
    We are happy to announce the publication of our newest tutorial, that explores some of the latest features added in our OEPE 12c release for ADF Development. The tutorial walks you through the creation of an ADF application that uses the ADF Faces Rich Client components, in combination with the ADF Controler, ADF Model and JPA. By developing this tutorial you will work and understand various features added into OEPE 12c that are specific to ADF development such as: ADF taskflow editor Visual pageDefinition editor ADF integration with AppXRay Navigation across artifacts such as pages, pageDefinition, managed beans, etc. Property inspector for ADF Faces components. Stay tunned for more and exciting tutorials that explore this and much more OEPE features. And of course your feedback is always welcome!

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  • Visio Stencils for ADF Faces Available on SampleCode

    - by juan.ruiz
    We are pleased to announce the launch of a new tool aiming to help visual designers and UI developers to build mockups for ADF applications outside of JDeveloper in a fast and quickly way. Available through samplecode.oracle.com, the ADF Visio stencils provide you with a large set of shapes, icons and layouts representing the most commonly used visual components. You can check out this video that shows you how to get you started using the Visio stencils. Let us know what do you think about the stencils on the JDeveloper Forum, your feedback is always important to us.

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  • ADF Desktop Integration Page Now Live on OTN

    - by juan.ruiz
    I’m happy to announce that we have launched the  ADF Desktop Integration home page on OTN. This page will centralize all the resources related to desktop integration. As you can notice, currently we are providing a variety of resources to help you understand the technology as well as to improve your overall ADF desktop integration learning experience. Let us know what you think about the page and what additional resources related to ADF desktop integration you would like us to include.

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  • Don't Miss All the OEPE Action at OOW and JavaOne

    - by Juan Camilo Ruiz
    This year at Oracle Open World the OEPE team will be participating in various activities along the week. Here is the summary of all them: mark your calendars and secure your spot, we'll be showing all the new and exciting that we have been working on. Sessions: Mon 1 Oct, 2012 Time Title Location 10:45 AM - 11:45 AM General Session: The Future of Development for Oracle Fusion—From Desktop to Mobile to Cloud Marriott Marquis - Salon 8 4:45 PM - 5:45 PM General Session: Building Mobile Applications with Oracle Cloud Moscone West - 2002/2004 3:15 PM - 4:15 PM End-to-End Oracle ADF Development in Eclipse Marriott Marquis - Golden Gate C3 Wed 3 Oct, 2012 Time Title Location 3:30 PM - 4:30 PM Oracle Developer Cloud Services Marriott Marquis - Salon 7 Hands-On Lab: Thur 4 Oct, 2012 Time Title Location 12:45 PM - 1:45 PM Oracle ADF for Java EE Developers with Oracle Enterprise Pack for Eclipse Marriott Marquis - Salon 3/4 Also you can see live demos throughout the week at our demo booths over in JavaOne and Moscone Center Demos Demo Location Cloud Developer Moscone North, Upper Lobby - N-002 Oracle Eclipse Projects Hilton San Francisco, Grand Ballroom - HHJ-008 Oracle Enterprise Pack for Eclipse Moscone South, Right - S-208 Also the OEPE team will be at the first ADF Developer Meetup at OOW, on Wednesday from 4.30 p.m - 5.30 p.m  at the OTN Lounge. Let's have a beer and let us know what you think about the product. See you in San Francisco! 

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  • Couldn't Make It to Oracle OpenWorld? Fear Not! Upcoming: Using the Oracle E-Business Suite SDK for Java in ADF Applications Webcast

    - by Juan Camilo Ruiz
    For those of you who didn't make it at Oracle OpenWorld, we have good news. The ADF and E-Business Suite teams are well aware that various ADF and Oracle E-Business Suite customers are looking for guidance on how to work with the Oracle E-Business Suite SDK for Java in ADF applications: its capabilities, limitations, etc. As some of you might know, Sara Woodhull from the Applications Technology Group (ATG) in Oracle E-Business Suite and I delivered a session on the topic at Oracle OpenWorld last week. The good news is that we are already planning to deliver this session again as a webcast, tentatively scheduled for Nov. 2, 2012.  Stay tuned to this and the Oracle E-Business Suite Technology Stack blog for upcoming information about the webcast.

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  • Single or multiple return statements in a function [on hold]

    - by Juan Carlos Coto
    When writing a function that can have several different return values, particularly when different branches of code return different values, what is the cleanest or sanest way of returning? Please note the following are really contrived examples meant only to illustrate different styles. Example 1: Single return def my_function(): if some_condition: return_value = 1 elif another_condition: return_value = 2 else: return_value = 3 return return_value Example 2: Multiple returns def my_function(): if some_condition: return 1 elif another_condition: return 2 else: return 3 The second example seems simpler and is perhaps more readable. The first one, however, might describe the overall logic a bit better (the conditions affect the assignment of the value, not whether it's returned or not). Is the second way preferable to the first? Why?

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  • How can I make eclipse look like VS.NET 2010?

    - by Juan Manuel
    I am constantly switching between a project written in C# 4.0 and another one written in Java. I find it very difficult to read the code in Java, and I think it's because of its colors (or lack of them really) Is there any way to mimic the colors that VS.NET 2010 has inside eclipse? (even better would be to replace all its hotkeys for their equivalent in VS.NET, like ctrl+k for ctrl+f3, but I believe it would be utopic)

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  • Building a Repository Pattern against an EF 5 EDMX Model - Part 1

    - by Juan
    I am part of a year long plus project that is re-writing an existing application for a client.  We have decided to develop the project using Visual Studio 2012 and .NET 4.5.  The project will be using a number of technologies and patterns to include Entity Framework 5, WCF Services, and WPF for the client UI.This is my attempt at documenting some of the successes and failures that I will be coming across in the development of the application.In building the data access layer we have to access a database that has already been designed by a dedicated dba. The dba insists on using Stored Procedures which has made the use of EF a little more difficult.  He will not allow direct table access but we did manage to get him to allow us to use Views.  Since EF 5 does not have good support to do Code First with Stored Procedures, my option was to create a model (EDMX) against the existing database views.   I then had to go select each entity and map the Insert/Update/Delete functions to their respective stored procedure. The next step after I had completed mapping the stored procedures to the entities in the EDMX model was to figure out how to build a generic repository that would work well with Entity Framework 5.  After reading the blog posts below, I adopted much of their code with some changes to allow for the use of Ninject for dependency injection.http://www.tcscblog.com/2012/06/22/entity-framework-generic-repository/ http://www.tugberkugurlu.com/archive/generic-repository-pattern-entity-framework-asp-net-mvc-and-unit-testing-triangle IRepository.cs public interface IRepository : IDisposable where T : class { void Add(T entity); void Update(T entity, int id); T GetById(object key); IQueryable Query(Expression> predicate); IQueryable GetAll(); int SaveChanges(); int SaveChanges(bool validateEntities); } GenericRepository.cs public abstract class GenericRepository : IRepository where T : class { public abstract void Add(T entity); public abstract void Update(T entity, int id); public abstract T GetById(object key); public abstract IQueryable Query(Expression> predicate); public abstract IQueryable GetAll(); public int SaveChanges() { return SaveChanges(true); } public abstract int SaveChanges(bool validateEntities); public abstract void Dispose(); } One of the issues I ran into was trying to do an update. I kept receiving errors so I posted a question on Stack Overflow http://stackoverflow.com/questions/12585664/an-object-with-the-same-key-already-exists-in-the-objectstatemanager-the-object and came up with the following hack. If someone has a better way, please let me know. DbContextRepository.cs public class DbContextRepository : GenericRepository where T : class { protected DbContext Context; protected DbSet DbSet; public DbContextRepository(DbContext context) { if (context == null) throw new ArgumentException("context"); Context = context; DbSet = Context.Set(); } public override void Add(T entity) { if (entity == null) throw new ArgumentException("Cannot add a null entity."); DbSet.Add(entity); } public override void Update(T entity, int id) { if (entity == null) throw new ArgumentException("Cannot update a null entity."); var entry = Context.Entry(entity); if (entry.State == EntityState.Detached) { var attachedEntity = DbSet.Find(id); // Need to have access to key if (attachedEntity != null) { var attachedEntry = Context.Entry(attachedEntity); attachedEntry.CurrentValues.SetValues(entity); } else { entry.State = EntityState.Modified; // This should attach entity } } } public override T GetById(object key) { return DbSet.Find(key); } public override IQueryable Query(Expression> predicate) { return DbSet.Where(predicate); } public override IQueryable GetAll() { return Context.Set(); } public override int SaveChanges(bool validateEntities) { Context.Configuration.ValidateOnSaveEnabled = validateEntities; return Context.SaveChanges(); } #region IDisposable implementation public override void Dispose() { if (Context != null) { Context.Dispose(); GC.SuppressFinalize(this); } } #endregion IDisposable implementation } At this point I am able to start creating individual repositories that are needed and add a Unit of Work.  Stay tuned for the next installment in my path to creating a Repository Pattern against EF5.

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  • Error when try to install subversion on linux [closed]

    - by Juan Carlos Vega Neira
    Possible Duplicate: Fixing Could not get lock /var/lib/dpkg/lock I have installed Ubuntu server 11.10 and after the installation finishes I installed apache server by this code. sudo apt-get install apache2 Then I tried to install subversion by this code: sudo apt-get install subversion as I saw on some blogs and got this error: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? How can I solve this error?

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  • Using packages (gems, eggs, etc.) to create decoupled architectures

    - by Juan Carlos Coto
    The main issue Seeing the good support most modern programming platforms have for package management (think gem, npm, pip, etc), does it make sense to design an application or system be composed of internally developed packages, so as to promote and create a loosely coupled architecture? Example An example of this would be to create packages for database access, as well as for authentication and other components of the system. These, of course, use external packages as well. Then, your system imports and uses these packages - instead of including their code within its own code base. Considerations To me, it seems that this would promote code decoupling and help maintainability, almost in a Web-based-vs.-desktop-application kind of way (updates are applied almost automatically, single code base for single functionality, etc.). Does this seem like a rational and sane design concept? Is this actually used as a standard way of structuring applications today? Thanks very much!

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  • Form development optimization

    - by Juan
    Like many web developers I do forms all the time. I found myself doing the same all the time: placing input fields, assigning a name to each, ajax the form, then create the PHP which involves to assign a PHP var to each $_REQUEST['var'], escape and validate data, build the html and emailing the results. So I found that 70% of the work is duplicated but I just can't duplicate a page and change the fields. I end up wasting more time reformatting, deleting and adding different fields than creating from scratch. I started planing to program a "list of IDs to html+php" converter in which I'd input all the IDs and this would output the basic html and php. Then I thought: there's got to be thousands of developers that go through this, I'd be reinventing the wheel. So this is my question, I'm trying to find that wheel that somebody must have invented already. I found this: http://www.trirand.com/blog/jqform/ which does more or less what I'm looking for but it's an expensive solution and it has too much functionality for what I'd be using it. Which tools do you use to optimize repetitive task about HTML and PHP?

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