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• I'm trying to install postgresql on 12.04, and it's just not working

  - by Pointy

  I've got a new installation and I'm trying to get Postgresql working. The database was installed and I started a restoration from a dump on another machine, but that ran into problems because I had forgotten to install the "contrib" package. I used "pg_dropcluster" to drop the old cluster so I could start from scratch, and that's when things went weird. The first manifestation of this was that /etc/postgresql was just empty. I uninstalled the postgresql package and reinstalled, several times, to no avail. Is there something I can do to figure out why apt is confused here? I've done this many times on many systems and never seen anything like this happen.

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• Map, Set use cases in a general web app

  - by user2541902

  I am currently working on my own Java web app (to be shown in interview to get a Java job). So I've not worked on Java in professional environment, so no guidance. I have database, entity classes, JPA relationships. Use cases are like, user has albums, album has pics, user has locations, location has co-ordinates etc. I used List (ArrayList) everywhere. I can do anything with List and DB, get some entry, find etc. For example, I will keep the list of users in List, then use queries to get some entry (why would I keep them in Map with id/email as key?). I know very well the working and features, implementing classes of Map, Set. I can use them for solving some algorithm, processing some data etc. In interviews, I get asked have you worked with these, where have you used them etc. So, Please tell me cases where they should be used (DB or any popular real use case).

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• OTN APAC Tour 2012: Bangkok, Thailand - Oct 22, 2012

  - by Mike Dietrich

  Roy had done some of the South America OTN Tour 2012 dates earlier this year in Peru and Chile. And I'm looking forward to present next Monday, October 22nd, 2012, on the OTN Tour 2012 in Bangkok, Thailand. The event will be held at the Eastin Grand Hotel in Bangkok. Register today for the OTN APAC Tour 2012 in Bangkok, Thailand! Presentations will include: 9:30am - 10:15am:Best Practices for Upgrading to Oracle Database 11.2 1:00pm - 1:45pm:How to improve Upgrade Performance - Real Speed, Real Customers, Real Secrets 2:45pm - 3:30pm:Oracle Data Pump: Overview and Best Practices Plus presentations  about Security, RMAN and other topics by Francisco Alvarez and others. Please find the complete agenda here. Looking forward to meet you on Monday - CU there

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• Dealing with technical debt

  - by Desolate Planet

  This is a question that I often ask myself when working with developers. I've worked at four companies so far, and I've noticed a lack of attention to keeping code clean and dealing with technical debt that hinders future progress in a software app. For example, the first company I worked for had written a database from scratch rather than take something like MySQL and that created hell for the team when refacoring or extending the app. I've always tried to be honest and clear with my manager when he discusses projections, but management doesn't seem interested in fixing what's already there and it's horrible to see the impact it has on team morale and in their attitude towards others. What are your thoughts on the best way to tackle this problem? What I've seen is people packing up and leaving and the company becomes a revolving door with developers coming and and out and making the code worse. How do you communicate this to management to get them interested in sorting out technical debt?

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• Webcast Replay: Extreme Performance for Consolidated Workloads with Oracle Exadata

  - by kimberly.billings

  If you missed our live webcast Extreme Performance for Consolidated Workloads with Oracle Exadata last week, the replay is now available. Watch the free on-demand webcast in which Tim Shetler, Vice President of Oracle Database Product Management, and Richard Exley, Consulting Member of Technical Staff, discuss how Oracle Exadata can help you can significantly improve application performance and reduce infrastructure costs by consolidating transaction processing, data warehousing, or mixed workloads on Oracle Exadata. Note: (1) Turn off pop-up blockers if the slides do not advance automatically. (2) Slides are available for download. var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• .NET DAL and arhitecture

  - by Parhs

  I have seen lots of articles but none really help me. That is because I want to use dapper as a DAL. Should I create repositories with special functions? Like getStaffActive()? If I use repositories I can implement with dapper-extension a generic crud I have no idea how to handle database connection. Where to open the connection? If I do this at every function then how am I supposed to use transaction scope? Somehow the repositories I work with should share a connection in order transaction to work. But how to do this? Openning connection in BLL? If I use queries and execute them directly then still the same thing.

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• How to organize unit/integration test in BDD

  - by whatf

  So finally after reading a lot, I have understood that the difference between BDD and TDD is between T & B. But coming from basic TDD background, what I used to was, first write unittest for database models write test for views (at this point start with integration test as well, along with unittests) write more integration tests for testing UI stuff. What would be a correct way to approach BDD. Say I have a simple blog application. Given : When a user logs in. He should be shown list of all his posts. But for this, I need a model with a row user, another row blog posts. So how do we go about writing tests? when do we create fixtures? When do we write integration (selenium) tests?

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• Open source login solution

  - by David

  Authentication is such a general problem, which most websites have to implement. There are a few commercial solutions, but all lack sufficient functionality to customize the registration process. Therefore, I am looking for an open-source alternative. I am using PHP and with PostgreSQL as database, but as far as I understand one could utilize authentication solutions using other technologies and integrate them into our site in various ways. Therefore, I am looking for such solutions in any technology apart from those requiring Microsoft infrastructure... I would prefer Open Source solution, which have already implemented the following features: Has password recovery procedure Username is the email address of the user Has "Remember me" functionailty (meaning that the user is logged in automatically without seeing the login page) email address verification Google has gotten me nowhere on this and neither a search on this site...

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• Configuring trace file size and number in WebCenter Content 11g

  - by Kyle Hatlestad

  Lately I've been doing a lot of debugging using the System Output tracing in WebCenter Content 11g.  This is built-in tracing in the content server which provides a great level of detail on what's happening under the hood.  You can access the settings as well as a view of the tracing by going to Administration -> System Audit Information.  From here, you can select the tracing sections to include.  Some of my personal favorites are searchquery,  systemdatabase, userstorage, and indexer.  Usually I'm trying to find out some information regarding a search, database query, or user information.  Besides debugging, it's also very helpful for performance tuning. [Read More] 

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• Oracle Catalog – product overview for middleware

  - by JuergenKress

  Are you looking for quick overview of all the Oracle product and solutions? The answer is the Oracle Catalog which helps you to understand the whole stack from hardware, database, middleware all the way to applications. A great source and helpful for sales persons and customers. Make sure you add the file to your mobile device. 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 Mix Forum Technorati Tags: Catalog,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• DBA Best Practices: A Blog Series

  - by Argenis

    Introduction After the success of the “Demystifying DBA Best Practices” Pre-Conference that my good friend Robert Davis, a.k.a. SQLSoldier [Blog|Twitter] and I delivered at multiple events, including the PASS Summit 2012, I have decided to blog about some of the topics discussed at the Pre-Con. My thanks go to Robert for agreeing to share this content with the larger SQL Server community. This will be a rather lengthy blog series - and as in the Pre-Con, I expect a lot of interaction and feedback. Make sure you throw in your two cents in the comments section of every blog post. First topic that I’ll be discussing in this blog series: The thing of utmost importance for any Database Administrator: the data. Let’s discuss the importance of backups and a solid restore strategy. Care to share your thoughts on this subject in the comments section below?

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• Key Windows Phone Development Concepts

  - by Tim Murphy

  As I am doing more development in and out of the enterprise arena for Windows Phone I decide I would study for the 70-599 test.  I generally take certification tests as a way to force me to dig deeper into a technology.  Between the development and studying I decided it would be good to put a post together of key development features in Windows Phone 7 environment.  Contrary to popular belief the launch of Windows Phone 8 will not obsolete Windows Phone 7 development.  With the launch of 7.8 coming shortly and people who will remain on 7.X for the foreseeable future there are still consumers needing these apps so don’t throw out the baby with the bath water. PhoneApplicationService This is a class that every Windows Phone developer needs to become familiar with.  When it comes to application state this is your go to repository.  It also contains events that help with management of your application’s lifecycle.  You can access it like the following code sample. 1: PhoneApplicationService.Current.State["ValidUser"] = userResult; DeviceNetworkInformation This class allows you to determine the connectivity of the device and be notified when something changes with that connectivity.  If you are making web service calls you will want to check here before firing off. I have found that this class doesn’t actually work very well for determining if you have internet access.  You are better of using the following code where IsConnectedToInternet is an App level property. private void Application_Launching(object sender, LaunchingEventArgs e){ // Validate user access if (Microsoft.Phone.Net.NetworkInformation.NetworkInterface.NetworkInterfaceType != Microsoft.Phone.Net.NetworkInformation.NetworkInterfaceType.None) { IsConnectedToInternet = true; } else { IsConnectedToInternet = false; } NetworkChange.NetworkAddressChanged += new NetworkAddressChangedEventHandler(NetworkChange_NetworkAddressChanged);}void NetworkChange_NetworkAddressChanged(object sender, EventArgs e){ IsConnectedToInternet = (Microsoft.Phone.Net.NetworkInformation.NetworkInterface.NetworkInterfaceType != Microsoft.Phone.Net.NetworkInformation.NetworkInterfaceType.None);} Push Notification Push notification allows your application to receive notifications in a way that reduces the application’s power needs. This MSDN article is a good place to get the basics of push notification, but you can see the essential concept in the diagram below.  There are three types of push notification: toast, Tile and raw.  The first two work regardless of the state of the application where as raw messages are discarded if your application is not running.   Live Tiles Live tiles are one of the main differentiators of the Windows Phone platform.  They allow users to find information at a glance from their start screen without navigating into individual apps.  Knowing how to implement them can be a great boost to the attractiveness of your application. The simplest step-by-step explanation for creating live tiles is here. Local Database While your application really only has Isolated Storage as a data store there are some ways of giving you database functionality to develop against.  There are a number of open source ORM style solutions.  Probably the best and most native way I have found is to use LINQ to SQL.  It does take a significant amount of setup, but the ease of use once it is configured is worth the cost.  Rather than repeat the full concepts here I will point you to a post that I wrote previously. Tasks (Bing, Email) Leveraging built in features of the Windows Phone platform is an easy way to add functionality that would be expensive to develop on your own.  The classes that you need to make yourself familiar with are BingMapsDirectionsTask and EmailComposeTask.  This will allow your application to supply directions and give the user an email path to relay information to friends and associates. Event model Because of the ability for users to switch quickly to switch to other apps or the home screen is just one reason why knowing the Windows Phone event model is important.  You need to be able to save data so that if a user gets a phone call they can come back to exactly where they were in your application.  This means that you will need to handle such events as Launching, Activated, Deactivated and Closing at an application level.  You will probably also want to get familiar with the OnNavigatedTo and OnNavigatedFrom events at the page level.  These will give you an opportunity to save data as a user navigates through your app. Summary This is just a small portion of the concepts that you will use while building Windows Phone apps, but these are some of the most critical.  With the launch of Windows Phone 8 this list will probably expand.  Take the time to investigate these topics further and try them out in your apps. del.icio.us Tags: Windows Phone 7,Windows Phone,WP7,Software Development,70-599

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• Oracle University Nuovi corsi (Week 23)

  - by swalker

  Oracle University ha recentemente rilasciato i seguenti nuovi corsi in inglese: Engineered Systems Exadata Database Machine Administration Workshop (Training On Demand) Development Tools Oracle Fusion Middleware 11g: Build Applications with ADF I (Training On Demand) Fusion Middleware Oracle AIA Foundation Pack 11g: Developing Applications (Training On Demand) Oracle Exalogic Elastic Cloud Administration (Training On Demand) Oracle GoldenGate 11g Fundamentals for Oracle (Training On Demand) Oracle Fusion Middleware 11g: Build Applications with ADF I (Training On Demand) Oracle WebCenter Portal 11g: Spaces Administration (3 giorni) Java Architect Enterprise Applications with Java EE (5 giorni) Hyperion Oracle Hyperion Planning 11.1.2: Create & Manage Applications (Training On Demand) Oracle Hyperion Financial Mgmt 11.1.2: Create & Manage Applications (Training On Demand) Per ulteriori informazioni e per conoscere le date dei corsi, contattate il vostro Oracle University team locale. Rimanete in contatto con Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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• Intro to NoSQL with RavenDB

  - by dgreen

  I did a talk on RavenDB back on 9/19/2012. Here was my abstract: "RavenDB is a document database which is gaining popularity in the 'NoSQL' movement. This session will introduce you to some non-relational concepts and describe how they compare/contrast with the relational solutions you're already familiar with. We'll go through the basics of RavenDB and show how easy it is to use from .NET” My next goal is to figure out how to post the slidedeck here (and maybe the code samples if I'm feeling ambitious). Then, the slides can be downloaded for only three easy payments of $39.99. However  for this one time special offer they are currently being given away absolutely FREE with a signup to http://meetup.trinug.org Footnote: I probably shouldn't have to say this, but my last comment about charging for my slidedeck was a joke. I have an odd sense of humor for those who don't already know me :)

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• Oracle Open World 2012 – Middleware update

  - by JuergenKress

  OpenWorld General Session 2012: Middleware In this general session, listen how developers leverage new innovations in their applications and customers achieve their business innovation goals with Oracle Fusion Middleware. We uploaded the key Fusion Middleware presentations (ppt format) in our SOA Community Workspace OFM OOW2012.pptx BPM Preview of Oracle BPM PS6.ppt and (Oracle Partner confidential) Please visit our SOA Community Workspace (SOA Community membership required). Read our First feedback from our ACE Directors: Guido Schmutz: My presentations at Oracle OpenWorld 2012 Lucas Jellema: OOW 2012 – Larry Ellison’s Keynote Announcements: Exa, Cloud, Database And from Antony Reynolds Many tweets #soacommunity with the latest OOW information have been posted on twitter. The First impressions are posted on our facebook page. 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 Mix Forum Technorati Tags: OOW 2012,OOW,presentations,slides,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• How important is the unit test in the software development?

  - by Lo Wai Lun

  We are doing software testing by testing a lot if I/O cases, so developers and system analysts can open reviews and test for their committed code within a given time period (e.g. 1 week). But when it come across with extracting information from a database, how to consider the cases and the corresponding methodology to start with? Although that is more likely to be a case studies because the unit-testing depends on the project we have involved which is too specific and particular most of the time. What is the general overview of the steps and precautions for unit-testing?

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• Removal of the JDBC-ODBC Bridge from Java SE 8 JDK

  - by user12629431

  Starting with Java SE 8, the JDBC-ODBC Bridge will no longer be included with the JDK. The JDBC-ODBC Bridge has always been considered transitional and a non-supported product[1] that was only provided with select JDK bundles and not included with the JRE. The JDBC-ODBC bridge provides limited support for JDBC 2.0 and does not support more recent versions of the JDBC specification. I would recommend that you use a JDBC driver provided by the vendor of your database or a commercial JDBC Driver instead of the JDBC-ODBC Bridge. [1]http://docs.oracle.com/javase/7/docs/technotes/guides/jdbc/bridge.html.

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• How activity id affects calculations such as schedule % complete when using a baseline?

  - by Jeffrey McDaniel

  Fields such as schedule % complete, planned value costs, etc. that use a baseline to help determine the value depend on the activity id's to match between the baseline project and the current project. If the activity id is changed the link is broken. In the P6 power client there is an internal guid that allows you to change the activity id in either the baseline or current project and still have these values related. In the P6 Reporting Database the activity id is used as the joining characteristic between which activities are a match between a baseline project and a current project.

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• Oracle Technology Network July 2012 Special Offers

  - by programmarketingOTN

  Oracle Technology Network July 2012 New offers are here!  Manning is offering 41% off The Well Grounded Java Developer and Oracle Press has added a discount on the eBook for Effective MySQL: Backup and Recovery.  To learn more and get the discount codes/links please go to the OTN Member Discount page.Lets not forget the other GREAT offers still going on as well - Packt Publishing Offers -  25% off - Oracle SOA Infrastructure Implementation Certification Handbook (1Z0-451 Oracle BPM Suite 11g Developer's cookbook Pearson Offers - 35% off Java Applications ArchitectureApress Offers - 40% off Beginning Database Design ENDS July 6th!Murach Offers - 30% off Oracle SQL and PL/SQL Safari Books Online - 10-day free trial + 20% off unlimited access to Safari Books Online for 6 monthsOracle Store Discounts - Save 10% on Your Next Purchase from the Oracle Store!

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• Internal HDs that don't contain the OS aren't accessable unless I try to manually browse them

  - by Hrafn

  So I have 4 internal hard drives, one that contains the OS (Ubuntu 12.04), all ext4. After starting the computer up, and without having tried to access the drives (File manager, terminal etc) it seems like the drives haven't been mounted. If I go into the "Disks" utility I see that the disks haven't been mounted. Programs that try to access the HD's during startup throw an error. For example my music player can't find the library, my note taking software can't find the database etc. But after opening the drive in a file manager everything works. I've checked SMART on all the disks and everything is a ok. Any and all ideas would be appreciated.

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• Run Java application as a different user [on hold]

  - by Harihar Das

  I need to run a few perl scripts from a Java GUI application. I am using Runtime API to do that. However, few of the perl scripts need to run under a specific user account to have special credentials to access specialized resources (e.g. Database, Files). I have heard of alleviating user access using UAC. But till now I am not able to find the solution. Please help me on how to run a process under a different user login. Is there anything similar to c# impersonization in Java?

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• SQL Server 2012 Cumulative Update #1 is available!

  - by AaronBertrand

  While I joked earlier this month that SQL Server 2012 Service Pack 1 was released on the same day as General Availability (hey, it's Microsoft's fault since they decided to GA on April 1), this time it isn't a joke. Today Microsoft has released Cumulative Update #1 for SQL Server 2012 . About half of the fixes affect the database engine. Analysis Services and Data Quality Services make up the bulk of the remainder. If you're running SQL Server 2012 now, I suggest you apply the update. This would...(read more)

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• Declarative Transactions in Node.js

  - by James Kingsbery

  Back in the day, it was common to manage database transactions in Java by writing code that did it. Something like this: Transaction tx = session.startTransaction(); ... try { tx.commit(); } catch (SomeException e){ tx.rollback(); } at the beginning and end of every method. This had some obvious problems - it's redundant, hides the intent of what's happening, etc. So, along came annotation-driven transactions: @Transaction public SomeResultObj getResult(...){ ... } Is there any support for declarative transaction management in node.js?

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• Greatly Enhanced LINQ Capabilities in Devart ADO.NET Data Providers

  Devart has recently announced the release of dotConnect products for Oracle, MySQL, PostgreSQL, and SQLite - ADO.NET providers that offer Entity Framework support, LINQ to SQL support, and contain an ORM model designer for developing LINQ to SQL and EF models based on different database engines. New dotConnect ADO.NET Providers offer advanced LinqConnect ORM solution (formerly known as Devart LINQ support) closely compatible with Microsoft LINQ to SQL and having its own advanced features. Devart...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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• Splitting Logic, Data, Layout and "Hacks"

  - by fjdumont

  Sure, we all heard of programming patterns such as MVVM, MVC and such. But that isn't really what I'm looking into as Layout, Data and Logic is already pretty much split up (XML-Layout markup, Database, insert your language of choice here). The platform I am developing for is hard to maintain over the updated versions and older OSes. The project significantly grew up over the last few months and dealing with different platform versions really is a pain. For example simply disabling an user interface control for all existing versions took me around 40 lines of code in the logic layer, wrangling around with invocation, delegation, singletons that provide UI handling and so on. Is there a clean way to keep track of those "hacks" by maybe excluding it into separate classes or even packages? Should I overwrite existing framework code in order to handle my requirements correctly? If so, does that concept have a name?

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