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  • Great Blog Comments

    - by Paul Sorensen
    Just a quick note to let you know that in the interest of keeping the most useful content available here on the Oracle Certification Blog, we do moderate the comments. We welcome (and encourage dialog, questions, comments, etc) here on the topics at hand. We'll never 'censor' out a comment just because we don't like it - in fact, this is how we often learn ways in which we can do better. But of course we will filter out the typical list like anyone else: crude/offensive remarks, foul language, reference to illegal activity, etc. We will also often redirect any customer-service type inquiries to [email protected] where they can best be handled.Also, if you have a question of a general nature, please research it on the Oracle Certification website first. We often won't respond to questions asking such as "tell me how to get 11g ocp", as we've already made sure that you have that kind of information available. Now if we've inadvertently 'hidden' something on our site (gulp), then fair enough - please let us know that you're having a hard time finding it and we'll be sure to try and "unbury it" ;-)Additionally, you may have more of an 'opinion' type question, such as "should I do 'x' certification or 'y' certification." For these, we highly recommend checking on the Oracle Technology Network (OTN) Certification Forum, where you can engage in peer-to-peer discussions, share techniques, advice and best practices with others in the field.In the meantime, please continue to share your thoughts, ideas, opinions, tech tips etc - we look forward to seeing them and passing them wherever we can!QUICK LINKS:Oracle Certification WebsiteEmail - Customer ServiceOracle Technology Network (OTN) Certification Forum

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  • ArchBeat Link-o-Rama for August 2, 2013

    - by OTN ArchBeat
    Podcast: Data Warehousing and Oracle Data Integrator - Part 2 Part to of the discussion about Data Warehousing and Oracle Data Integrator focuses on a discussion of how data warehousing is changing and the forces driving that change. Panelists for this discussion are Uli Bethke, Oracle ACE Director Cameron Lackpour, Oracle ACE Director (and guest producer) Gurcan Orhan, and Michael Rainey. Case Management In-Depth: Cases & Case Activities Part 1 – Acivity Scope | Mark Foster FMW solution architect Mark Foster kicks off a new series with a look at the decisions made on the scope of BPM process case activities. Video: Quick Intro to WebLogic Maven Plugin 12.1.2 | Mark Nelson This YouTube video by FMW solution architect Mark Nelson offers a quick introduction to the basics of installing and using the new Oracle WebLogic 12.1.2 Maven Plugin. Running the Managed Coherence Servers Example in WebLogic Server 12c | Tim Middleton FMW solution architect Tim Middleton shares the technical details on the new Managed Coherence Servers feature and outlines how you can run the sample application available with a WebLogic Server 12.1.2 install. What’s wrong with how we develop and deliver SOA Applications today? | Mark Nelson "When we arrive at the go-live day, we have a lot of fear and uncertainty," says solution architect Mark Nelson of the typical SOA practice. "We have no idea if the system is going to work in production. We have never tested it under a production-like load, and we have not really tested it for performance, longevity, etc." OTN Latin America Tour 2013 | Kai Yu Oracle ACE Director Kai Yu shares the session abstracts from his participation in the 2013 Oracle Technology Network Latin America conference tour, which made its way through OUG conferences in Ecuador, Guatemala, Panama, and Costa Rica. Webcast: Latest Security Innovations in Oracle Database 12c Oracle Database 12c includes more new security capabilities than any other release in Oracle history! In this webcast Roxana Bradescu (Director, Oracle Database Security Product Management) will discuss these capabilities and answer your questions. (Registration required.) Thought for the Day "The main goal in life career-wise should always be to try to get paid to simply be yourself." — Kevin Smith (Born August 2, 1970) Source: brainyquote.com

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  • Why is Quicksort called "Quicksort"?

    - by Darrel Hoffman
    The point of this question is not to debate the merits of this over any other sorting algorithm - certainly there are many other questions that do this. This question is about the name. Why is Quicksort called "Quicksort"? Sure, it's "quick", most of the time, but not always. The possibility of degenerating to O(N^2) is well known. There are various modifications to Quicksort that mitigate this problem, but the ones which bring the worst case down to a guaranteed O(n log n) aren't generally called Quicksort anymore. (e.g. Introsort). I just wonder why of all the well-known sorting algorithms, this is the only one deserving of the name "quick", which describes not how the algorithm works, but how fast it (usually) is. Mergesort is called that because it merges the data. Heapsort is called that because it uses a heap. Introsort gets its name from "Introspective", since it monitors its own performance to decide when to switch from Quicksort to Heapsort. Similarly for all the slower ones - Bubblesort, Insertion sort, Selection sort, etc. They're all named for how they work. The only other exception I can think of is "Bogosort", which is really just a joke that nobody ever actually uses in practice. Why isn't Quicksort called something more descriptive, like "Partition sort" or "Pivot sort", which describe what it actually does? It's not even a case of "got here first". Mergesort was developed 15 years before Quicksort. (1945 and 1960 respectively according to Wikipedia) I guess this is really more of a history question than a programming one. I'm just curious how it got the name - was it just good marketing?

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  • Silverlight Cream for November 27, 2011 -- #1176

    - by Dave Campbell
    In this Issue: Matt Eland, Parag Joshi, Jerrel Blankenship, and Joost van Schaik. Above the Fold: WP7: "Safe event detachment base class for Windows Phone 7 behaviors" Joost van Schaik Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com:31 Days of Mango | Day #22: App ConnectMatt Eland takes the reigns of Jeff's blog for Day 22 and is talking about App Connect... App Connect allows apps to be listed on Quick Cards relative to an app's subject matter, and Quick Cards are items that appear in searches to let users find out more info... check out the blog post if you're not familiar with this31 Days of Mango | Day #21: SocketsJeff's Day 21 is written by Parag Joshi, and is on sockets... and is building a WP7 app for posting restaurant orders to a Silverlight OOB app running on a host machine... good sized tutorial and discussion, plus a project to download and play with31 Days of Mango | Day #20: Creating RingtonesJerrel Blankenship has Day 20 for Jeff Blankenburg's 31 Days of Mango and is discussing Ringtones... how to create and save a custom ringtone for your userSafe event detachment base class for Windows Phone 7 behaviorsJoost van Schaik revisits his Safe Event Detachment pattern for WP7 and built a base class to take care of the initialization involved to be kind to us, the developers... code includedStay in the 'Light!Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCreamJoin me @ SilverlightCream | Phoenix Silverlight User GroupTechnorati Tags:Silverlight    Silverlight 3    Silverlight 4    Windows PhoneMIX10

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  • Caching strategies for entities and collections

    - by Rob West
    We currently have an application framework in which we automatically cache both entities and collections of entities at the business layer (using .NET cache). So the method GetWidget(int id) checks the cache using a key GetWidget_Id_{0} before hitting the database, and the method GetWidgetsByStatusId(int statusId) checks the cache using GetWidgets_Collections_ByStatusId_{0}. If the objects are not in the cache they are retrieved from the database and added to the cache. This approach is obviously quick for read scenarios, and as a blanket approach is quick for us to implement, but requires large numbers of cache keys to be purged when CRUD operations are carried out on entities. Obviously as additional methods are added this impacts performance and the benefits of caching diminish. I'm interested in alternative approaches to handling caching of collections. I know that NHibernate caches a list of the identifiers in the collection rather than the actual entities. Is this an approach other people have tried - what are the pros and cons? In particular I am looking for options that optimise performance and can be implemented automatically through boilerplate generated code (we have our own code generation tool). I know some people will say that caching needs to be done by hand each time to meet the needs of the specific situation but I am looking for something that will get us most of the way automatically.

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  • how do I write a functional spec quickly and efficiently

    - by giddy
    So I just read some fabulous articles by Joel on specs here. (Was written in 2000!!) I read all 4 parts, but Im looking for some methodical approaches to writing my specs. Im the only lonely dev, working on this fairly complicated app (or family of apps) for a very well known finance company. I've never made something this serious, I started out writing something like a bad spec, an overview of some sorts, and it has wasted a LOT of my time. Ive also made 3 mockup-kinda-thingies for my client so I have a good understanding of what they want. Also released a preview (a throw away working app with the most basic workflow), and Ive only written and tested some of the very core/base systems. I think the mistake Ive been making so far is not writing a detailed spec, so Im getting to it now. So the whole thing comprises of An MVC website (for admins & data viewing) 2 Silverlight modules (For 2 specific tasks) 1 Desktop Application Im totally short on time, resources and need to get this done quick, also, need to make sure these guys read it up equally quick and painlessly. So how do I go about it, Im looking for any tips, any real world stuff, how do you guys usually do it? Do you make a mock screenie of every dialog/form/page? Im thinking of making a dummy asp.net web forms project, then filling in html files in folders and making it look like my mvc url structure. Then having a section in the spec for the website and write up a page for every URL Ive got with a screenie. For my win forms app, Ive made somewhat of a demo Win Form project, would I then put in a dialog or stucture everything as I would in the real app and then screen shot it?

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  • The Exceptional EXCEPT clause

    - by steveh99999
    Ok, I exaggerate, but it can be useful… I came across some ‘poorly-written’ stored procedures on a SQL server recently, that were using sp_xml_preparedocument. Unfortunately these procs were  not properly removing the memory allocated to XML structures – ie they were not subsequently calling sp_xml_removedocument… I needed a quick way of identifying on the server how many stored procedures this affected.. Here’s what I used.. EXEC sp_msforeachdb 'USE ? SELECT DB_NAME(),OBJECT_NAME(s1.id) FROM syscomments s1 WHERE [text] LIKE ''%sp_xml_preparedocument%'' EXCEPT SELECT DB_NAME(),OBJECT_NAME(s2.id) FROM syscomments s2 WHERE [text] LIKE ''%sp_xml_removedocument%'' ‘ There’s three nice features about the code above… 1. It uses sp_msforeachdb. There’s a nice blog on this statement here 2. It uses the EXCEPT clause.  So in the above query I get all the procedures which include the sp_xml_preparedocument string, but by using the EXCEPT clause I remove all the procedures which contain sp_xml_removedocument.  Read more about EXCEPT here 3. It can be used to quickly identify incorrect usage of sp_xml_preparedocument. Read more about this here The above query isn’t perfect – I’m not properly parsing the SQL text to ignore comments for example - but for the quick analysis I needed to perform, it was just the job…

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  • SQL SERVER – Storing Variable Values in Temporary Array or Temporary List

    - by pinaldave
    SQL Server does not support arrays or a dynamic length storage mechanism like list. Absolutely there are some clever workarounds and few extra-ordinary solutions but everybody can;t come up with such solution. Additionally, sometime the requirements are very simple that doing extraordinary coding is not required. Here is the simple case. Let us say here are the values: a, 10, 20, c, 30, d. Now the requirement is to store them in a array or list. It is very easy to do the same in C# or C. However, there is no quick way to do the same in SQL Server. Every single time when I get such requirement, I create a table variable and store the values in the table variables. Here is the example: For SQL Server 2012: DECLARE @ListofIDs TABLE(IDs VARCHAR(100)); INSERT INTO @ListofIDs VALUES('a'),('10'),('20'),('c'),('30'),('d'); SELECT IDs FROM @ListofIDs; GO When executed above script it will give following resultset. Above script will work in SQL Server 2012 only for SQL Server 2008 and earlier version run following code. DECLARE @ListofIDs TABLE(IDs VARCHAR(100), ID INT IDENTITY(1,1)); INSERT INTO @ListofIDs SELECT 'a' UNION ALL SELECT '10' UNION ALL SELECT '20' UNION ALL SELECT 'c' UNION ALL SELECT '30' UNION ALL SELECT 'd'; SELECT IDs FROM @ListofIDs; GO Now in this case, I have to convert numbers to varchars because I have to store mix datatypes in a single column. Additionally, this quick solution does not give any features of arrays (like inserting values in between as well accessing values using array index). Well, do you ever have to store temporary multiple values in SQL Server – if the count of values are dynamic and datatype is not specified early how will you about storing values which can be used later in the programming. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • I need advice on laptop purchase for university [closed]

    - by Systemic33
    I'm currently in University studying Computer Science/IT/Information Technology. And this first year i've managed to do with the laptop I had; an ASUS Eee PC 1000H with a 10.1" screen. But this is getting way too underpowered and small for programming more than just quick programming introduction excercises. So I'm looking to buy a more suitable laptop. It's not supposed to be a desktop replacement though, since I've got a pretty good desktop already with a 24" monitor. So the kinda laptop I want to buy is one suited for university. If this bears any significance, I'm working in Java atm, but I will likely work with lots of other things incl. web development. I'm looking to spend about $1700 plus/minus. And it should be powerful/big enough for working on programming projects as well as the usual university stuff like MATLAB, Maple, etc out "in the field", and sometimes for maybe a week when visiting my parents. What I'm looking at right now is the ASUS Zenbook UX31A with the 1920 x 1080 resolution on 13.3" IPS display. But I'm kinda nervous that this will be too petite for programming. In essence i'm looking for a powerfull computer, that has good enough battery, and looks good. I would love suggestions or any type of feedback, either with maybe a better choice, or input on how its like programming on 13" laptops. Very much thanks in advance for anyone who even went through all that! PS. I don't want a mac, or my inner karma would commit Seppuku xD But experiences from working on the 13" Macbook Air would kinda be equivalent to the Zenbook i'm considering, so I would love to hear that. tl;dr The quick brown fox jumps over the lazy dog ;)

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  • Great Example of a Simple Cost-Benefit Analysis

    - by BuckWoody
    I saw a post the other day that you should definitely go check out. It’s a cost/benefit decision, and although the author gives it a quick treatment and doesn’t take all points in the decision into account, you should focus on the process he follows. It’s a quick and simple example of the kind of thought process we should have as data professionals when we pick a server, a process, or application and even platform software. The key is to include more than just the price of a piece of software or hardware. You need to think about the “other” costs in the decision, and then make the right one. Sometimes the cheapest option is the cheapest, and other times, well, it isn’t. I’ve seen this played out not only in the decision to go with a certain selection, but in the options or editions it comes in. You have to put all of the decision points in the analysis to come up with the right answer, and you have to be able to explain your logic to your team and your company. This is the way you become a data professional, not just a DBA. You can check out the post here – it deals with Azure, but the point is the process, not Azure itself: http://blogs.msdn.com/eugeniop/archive/2010/03/19/windows-azure-guidance-a-simplistic-economic-analysis-of-a-expense-migration.aspx Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • To encryption=on or encryption=off a simple ZFS Crypto demo

    - by darrenm
    I've just been asked twice this week how I would demonstrate ZFS encryption really is encrypting the data on disk.  It needs to be really simple and the target isn't forensics or cryptanalysis just a quick demo to show the before and after. I usually do this small demo using a pool based on files so I can run strings(1) on the "disks" that make up the pool. The demo will work with real disks too but it will take a lot longer (how much longer depends on the size of your disks).  The file hamlet.txt is this one from gutenberg.org # mkfile 64m /tmp/pool1_file # zpool create clear_pool /tmp/pool1_file # cp hamlet.txt /clear_pool # grep -i hamlet /clear_pool/hamlet.txt | wc -l Note the number of times hamlet appears # zpool export clear_pool # strings /tmp/pool1_file | grep -i hamlet | wc -l Note the number of times hamlet appears on disk - it is 2 more because the file is called hamlet.txt and file names are in the clear as well and we keep at least two copies of metadata. Now lets encrypt the file systems in the pool. Note you MUST use a new pool file don't reuse the one from above. # mkfile 64m /tmp/pool2_file # zpool create -O encryption=on enc_pool /tmp/pool2_file Enter passphrase for 'enc_pool': Enter again: # cp hamlet.txt /enc_pool # grep -i hamlet /enc_pool/hamlet.txt | wc -l Note the number of times hamlet appears is the same as before # zpool export enc_pool # strings /tmp/pool2_file | grep -i hamlet | wc -l Note the word hamlet doesn't appear at all! As a said above this isn't indended as "proof" that ZFS does encryption properly just as a quick to do demo.

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  • ArchBeat Link-o-Rama for 10-18-2012

    - by Bob Rhubart
    WebLogic Server 11gR1 Interactive Quick Reference | WebLogic Partner Community EMEA "The WebLogic Server 11gR1 Administration interactive quick reference," explains Juergen Kress, "is a multimedia tool for various terms and concepts used in WebLogic Server architecture. This tool is available for administrators for online or offline use. This is built as a multimedia web page which provides descriptions of WebLogic Server Architectural components, and references to relevant documentation. This tool offers valuable reference information for any complex concept or product in an intuitive and useful manner." Oracle ACE Directors Nordic Tour 2012 : Venues and BI Presentations | Mark Rittman Oracle ACE Director Mark Rittman shares information on the Oracle ACE Director Tour, as the community leaders make their way through the land of the midnight sun, with events in Copenhagen, Stockholm, Oslo and Helsinki. The yearly AMIS Review from Oracle Open World and JavaOne – slides available | Lucas Jellema Oracle ACE Director Lucas Jellema presents the complete collection of presentations from the latest edition of AMIS Technology's annual review of "news, trends, announcements, special finds and interesting rumors" from Oracle OpenWorld and JavaOne. Fujitsu: Cloud Building with Oracle VM and Oracle Enterprise Manager 12c In this video, Oracle ACE Director Debra Lilley from Fujitsu discusses Cloud Services delivery using Oracle VM 3 and Oracle Enterprise Manager 12c. Webcast: ResCare Solves Content Lifecycle Challenges with Oracle WebCenter – October 30 Learn how ResCare solves content lifecycle challenges with Oracle WebCenter. Speakers: Joe Lichtefeld, VP of Application Services & PMO, ResCare Wayne Boerger, Product Manager, TEAM Informatics Doug Thompson, EVP Global Development, TEAM Informatics Date: Tuesday, October 30, 2012 Time: 10:00 a.m. PT / 1:00 p.m. ET Thought for the Day "There is only one thing more painful than learning from experience and that is not learning from experience." — Archibald McLeish (May 7, 1892 – April 20, 1982) Source: softwarequotes.com

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  • OpenWorld Suggest-a-Session Voting on Oracle Mix now OPEN!

    - by keith.laker
    Last year the Oracle OpenWorld team decided to use Oracle Mix as a way to select some of the papers for OpenWorld and this year we are following the same process. The majority of papers for this year's conference have already been selected, however, there are some presentation slots still available so the OpenWorld team are giving you the chance to vote on which papers you want to see at this year's OpenWorld conference.The voting process has just opened and will close on June 20. I did a quick search on the list of sessions one paper really caught my eye: Case Study: Real-Time data warehousing and fraud detection with Oracle 11gR2 by Dr. Holger Friedrich. As a data warehouse product manager I would love to see this paper selected. I have attended a number of presentations over the years given by Holger and he is an excellent, knowledgeable and entertaining presenter. The subject area is, for me, very interesting as it covers topics that I know are important to our customers and this case study highlights the innovative use of key database features. I would strongly encourage everyone to please vote for this paper. You can vote for Holger's presentation by going here:https://mix.oracle.com/oow10/proposals/10566-case-study-real-time-data-warehousing-and-fraud-detection-with-oracle-11gr2There are some rules relating to the voting process and these are all explained here: https://mix.oracle.com/oow10/faqA Quick Overview of the voting rules?1) You have to a member of the Oracle Mix communityBut membership is free! To sign up for a Mix account and you are one your way. You can sign-up by clicking on the "Create an Account" link in the top right corner of the Oracle Mix home page: https://mix.oracle.com/2) You have to vote for 3 different papersBased on last year’s voting pattern, the Mix team found that a number of participants were only voting for their own sessions. This year voters are required to vote on at least three sessions. How do I find the list of presentations? The full list of all available presentations is here: https://mix.oracle.com/oow10/proposalsGood luck and happy voting. Look forward to seeing you all at OpenWorld.

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  • Fn key sticks down

    - by Oli
    Just bought my significant other a shiny new Samsung Q330 13" netbook, stuck an OCZ Agility in it and installed Maverick. Just as a quick aside, this is a devastating combination. Graphics work perfectly and it cold-boots to desktop in about 7 seconds. Very quick. But (common to laptops) I've got a couple of problems. I'll start with the most problematic and start a new thread for the other. Like a lot of laptops, there is a Fn (function) modifier to allow some keys to have another purpose. When I tried to alter the brightness of the screen by tapping Fn+Down, it worked but kept on going until it was as dim as it could go. I tapped Fn+Up and it went to the other extreme. After that the entire keyboard ceases to work properly because the Fn modifier appears to be locked. Additionally, and as a direct side effect, I think, clicking on things doesn't result in a standard result. It's as if control is being held. A reboot is the only thing that seems to fix these problems. This isn't a problem if you don't touch the Fn key but as there are two of them on the keyboard, an accident is going to happen sooner than later, requiring a reboot (and probably some data loss). I don't have a lot of experience with laptops (I prefer my hulking great desktop) so this isn't my area of expertise. I'm open to all suggestions, even disabling the two Fn keys until we can find a better solution.

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  • Read-only lock on a SharePoint site collection, or Why can't I edit anymore?

    - by PeterBrunone
    Monday morning, the calls started.  For some reason, long-time users were unable to edit list items.  I figured we had a permissions issue, so I popped in to look at the Site Settings -- and found that I couldn't.  A quick trip to Central Administration showed that I was still listed as a Site Collection Administrator, but I had no power at all on the site collection in question.A quick glance at the logs told me that the server had recently shut down unexpectedly (this is a Hyper-V virtual machine).  Apparently, in the confusion, somehow SharePoint decided to lock the site collection as Read Only.  This can be remedied in one of two ways:1)  In Central Administration, go to Application Management->SharePoint Site Management->Site collection quotas and locks.  Once you have arrived, select the correct application and site collection, and you will have the opportunity to view and set the lock status of the collection (it most likely will be set to "Read-only", and you'll want to move that radio button to "Not locked").2)  Fire up stsadm and issue the following command:stsadm -o setsitelock -url http://myportalsitecollection -lock none

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  • Simple monitoring of a Raspberry Pi powered screen - Part 2

    - by Chris Houston
    If you have read my previous blog post Raspberry Pi entrance signed backed by Umbraco - Part 1 which describes how we used a Raspberry Pi to drive an Entrance sign for QV Offices you will have seen I mentioned a follow up post about monitoring the sign.As the sign is mounted in the entrance of the building on the ground floor and the reception is on the 1st floor, this meant that if there was a fault of any kind showing on the screen, the first person to see this was inevitably one of QV Offices' clients as they walked into the building.Although the QV Offices' team were able to check the Umbraco website address that the sign uses, this did not always mean that everything was working as expected. We noticed a couple of times that the sign had Wifi issues (it is now hard wired) and this caused the Chromium browser to render a 404 error when it tried to refresh the screen.The simple monitoring solutionWe added the following line to our refresh script, so that after the sign had been refreshed a screen shot of the Raspberry Pi would be taken:import -display :0 -window root ~/screenshot.jpgFinally we wrote a small Crontab task that ran on a QV Offices Mac that grabs this screen shot and saved it on the desktop, admittedly we have used a package that it not mega secure, but in reality this is an internal system that only runs an office sign, so we are not to concerned about it being hacked.*/5 * * * * /usr/local/bin/sshpass -p 'password' /usr/bin/scp [email protected]:screenshot.jpg Desktop/QVScreenShot.jpgAs the file icon updates, if the image changes, this gives a quick visual indication of the status of the sign, if for some reason the icon does not look correct the QV Offices administrator can just click on the file to see the exact image currently displayed on the sign.Sometimes a quick and easy solution is better than a more complex and expensive one.

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  • ArchBeat Link-o-Rama for 2012-09-28

    - by Bob Rhubart
    Follow the action: OTN's YouTube Channel Check out what's happening at Oracle OpenWorld and JavaOne with video coverage by the OTN crew. New interviews and more posted daily on the OTN YouTube channel. Whiteboards, not red carpets. OTN Architect Day Los Angeles. Oct 25. Free event. Yes, it's Tinsel Town, but the stars at this event are experts in the use of Oracle technologies in today's architectures. This free event includes a full slate of technical sessions and peer interaction covering cloud computing, SOA, and engineered systems–and lunch is on us. Register now. Thursday October 25, 2012, 8:00 a.m. – 5:00 p.m. Sofitel Los Angeles, 8555 Beverly Boulevard, Los Angeles, CA 90048 Overview about the 5th SOA, Cloud and Service Technology Symposium | Jan van Zoggel Middleware consultant and author Jan van Zoggel shares an overview of three of the sessions he attended at this week's SOA, Cloud, and Service Technology Forum in the UK. OOW 2012: Questions to get answered during this conference | Lucas Jellema Oracle ACE Director Lucas Jellema shares "a quick list of some of the questions that are on the top of my head to get answered during thus year's conference." The list may be quick, but it is quit detailed, and well worth a look. Front-ending a SAML Service Provider with OHS | Andre Correa Oracle Fusion Middleware A-Team member Andre Correa shares a follow-up to a previous post covering Integrating OBIEE 11g into Weblogic's SAML SSO. Thought for the Day "Simplicity is prerequisite for reliability." — Edsger W. Dijkstra (May 11, 1930 – August 6, 2002) Source: SoftwareQuotes.com

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  • Smarter Search Results in NetBeans IDE 7.2

    - by Geertjan
    After you search your code using NetBeans IDE (using Ctrl-F for "Find" or Ctrl-H for "Replace"), you see the Search Results window, which looks like this: At least, the above is how it looks in NetBeans IDE 7.2. Before that, you didn't have all those extra columns (which can be displayed in the Search Results window after clicking the small button top right in the view) and you also didn't have the quick search (which is invoked by typing directly into the Search Results window), as can be seen here: So, the Search Results window now provides a lot more info than before. Being able to know the path to a file I've found, as well as the last modification date, file size, and the number of matches within the file, is useful at the end of a search process. In the NetBeans IDE 7.2 New & Noteworthy, the above changes are described in the Utilities section, as well as in the Quick Search in OutlineView section, where you can read that these are generic solutions that can be used in your own OutlineViews. Other OutlineViews in NetBeans IDE 7.2, such as the Debugger window, now also have these new features. A related article worth reading is Beefed Up Code Navigation Tools in NetBeans IDE 7.2. 

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  • Why does Android make good coding so difficult?

    - by metacircle
    my daily work is writing tools in C#/WPF. After over more than 1 year on the job now, I came to love MVVM, IoC Containers, XAML (and more). It's pure fun to write code, since simple, maintainable and extendable code just comes naturally when you follow a few basic patterns. In my free time I really want to write some apps, mainly for my own personal use. I want to write apps for fun and not to make money or anything, that being said, paying an annual fee to be allowed to use my own apps on my own device is a total no-go for me. So I am not able to code for Windows Phone and am also not able to use Xamarin on Android (which is sad since Visual Studio + Resharper is programmers heaven). So I am stuck with Android "classic" Java development. Everytime I sit down at home to create an app, or improve some of the code I have already written I get annoyed very quick because getting good, decoupled code is just so hard to accomplish. It feels like everything you have to do in Android to create a good architecture is a workaround instead of being the way things are meant to be. Writing the UI in xml is fine, but everything else is one big code mess. Even all the tutorials do all their coding in the code behind. For 'hello world' this is fine, but for anything bigger this gets messy very very quick. This is where the fun for me ends. It's just no fun anymore because I just spend 90% of my time refactoring and thinking of workarounds how to make my code more maintainable with all the restrictions Android puts on me. Am I missing a crucial part or is this just the way Android is meant to be? Do you have any suggestions how to learn 'the fun way' of Android programming.

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  • Simple Introduction to using the Enterprise Manager SOA/BPM Facade API by Jaideep Ganguli

    - by JuergenKress
    There may be times when you need to expose just a small section of what is displayed in the Enterprise Manager console for SOA/BPM (EM console). A simple example can be where stakeholders on the systems integration or customer teams want to monitor a dashboard of statistics on how many instances of a composite have been created and how many have faulted. You can see this in the EM, as shown below Some of these stakeholders may not have knowledge of  EM console and they just want a quick view into the statistics, without having to navigate EM. This post describes how to use the Oracle Fusion Middleware Infrastructure Management Java API  for Oracle SOA Suite (also called the Facade API)  to build a custom ADF page to display this information. If you want a quick introduction in using the Facade API, this post is for you. Read the complete article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Technorati Tags: Enterprise Manager,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • What makes you look like a bad developer (ie a hacker) [on hold]

    - by user134583
    This comes from a lot of people about me, so I have to look at myself. So I would wonder what make one a bad developer (ie a hacker). These are a few things about me I used IDE intensively, all features, you name it: auto-completion, refactoring, quick fixes, open type, view hierarchy, API documentation, etcc When I deal with writing code for a project in domain I am not used to (I can't have fluency in this, this is new), I only have a very rough high level ideas. I don't use the standard modeling diagrams for early detail planning. Unorthodox diagrams that I invented when I need to draw the design in details. I don't use UML or similar, I find them not enough. I divide the sorts of diagram I drew into 3 types. Very high level diagrams which probably can be understood by almost anybody. Data entity diagram used for modeling data objects only (like ER diagrams and tree for inheritances and composition). Action diagrams for agents/classes and their interactions on data objects they contain. Constantly changing the interface (public methods) between interacting agents/classes if the need arises. I am more refrained when the interface and the module have matured Write initial concept code in a quick hackie way just so that the module works in the general cases so that I can play around with it. The module will be re-factored intensively after playing around so I could see more corner cases that I couldn't or (wouldn't want) anticipate before writing code. Using JUnit for integration-like test by using TestSuite class and ordering Unit test classes in the suite Using debugger almost anytime there is a problem instead of reading the code Constantly search on the internet for how to do some thing with some library that I haven't used a lot. So judgment, am I a bad developer? a hacker? Put in other words, to make sure this is not considered off-topic: - Is this bad practice to make your code too agile during incubating/prototyping phase of software development - Is it bad practice to use JUnit for integration testing, (I know there are other framework for integration testing, but those frameworks are for a specific products, not general)

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  • Can you recommend a game server for a facebook board game?

    - by Yekmer Simsek
    I am seeking a game server that will scale well. All commercial and/or free software alternatives are welcome. Game will be a boardgame that is similar to poker. Some technical details are listed below. There will be a table which consists of 4 people, to send them message I need a channel manager. A table will be ready to play for at least 5 minutes. There should be a reliable channel manager. People will wait for some time(i.e.) and if they are not playing they will be kicked by server, so there will be a reliable timed task queue to execute some tasks. It should be quick enough to response and show the changes to all 4 people on that table simultaneously.To achive this server should have a powerfull I/O library. I think to use inmemory to have quick response times, but it comes with scalability problems. And some variables should be thread safe so a variable should be thread safe between multiple nodes. Flash(AS3) and Unity (.Net 2.0 C# mono) client API's should be available for socket connection. PS: I am using Reddwarf server, it lacks of documentation and multiple node.

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  • localhost/phpmyadmin pulls blank page

    - by Atul Modi
    When I tried configuring local machine as a Internet Gateway with website development capabilities over it and I installed all required software into it. I also had disable the selinux into it. But PROBLEM is when I do http://localhost/phpMyAdmin or all lower case than the page shows it as a blank page. I am pasting code from httpd.conf file into this as well as from phpMyAdmin.conf file I am using Fedora 16 for this. httpd.conf ServerTokens OS ServerRoot "/etc/httpd" PidFile run/httpd.pid Timeout 60 KeepAlive Off MaxKeepAliveRequests 100 KeepAliveTimeout 5 StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 4000 StartServers 4 MaxClients 300 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 Listen 80 LoadModule auth_basic_module modules/mod_auth_basic.so LoadModule auth_digest_module modules/mod_auth_digest.so LoadModule authn_file_module modules/mod_authn_file.so LoadModule authn_alias_module modules/mod_authn_alias.so LoadModule authn_anon_module modules/mod_authn_anon.so LoadModule authn_dbm_module modules/mod_authn_dbm.so LoadModule authn_default_module modules/mod_authn_default.so LoadModule authz_host_module modules/mod_authz_host.so LoadModule authz_user_module modules/mod_authz_user.so LoadModule authz_owner_module modules/mod_authz_owner.so LoadModule authz_groupfile_module modules/mod_authz_groupfile.so LoadModule authz_dbm_module modules/mod_authz_dbm.so LoadModule authz_default_module modules/mod_authz_default.so LoadModule authn_dbd_module modules/mod_authn_dbd.so LoadModule dbd_module modules/mod_dbd.so LoadModule ldap_module modules/mod_ldap.so LoadModule authnz_ldap_module modules/mod_authnz_ldap.so LoadModule include_module modules/mod_include.so LoadModule log_config_module modules/mod_log_config.so LoadModule logio_module modules/mod_logio.so LoadModule env_module modules/mod_env.so LoadModule ext_filter_module modules/mod_ext_filter.so LoadModule mime_magic_module modules/mod_mime_magic.so LoadModule expires_module modules/mod_expires.so LoadModule deflate_module modules/mod_deflate.so LoadModule headers_module modules/mod_headers.so LoadModule usertrack_module modules/mod_usertrack.so LoadModule setenvif_module modules/mod_setenvif.so LoadModule mime_module modules/mod_mime.so LoadModule dav_module modules/mod_dav.so LoadModule status_module modules/mod_status.so LoadModule autoindex_module modules/mod_autoindex.so LoadModule info_module modules/mod_info.so LoadModule dav_fs_module modules/mod_dav_fs.so LoadModule vhost_alias_module modules/mod_vhost_alias.so LoadModule negotiation_module modules/mod_negotiation.so LoadModule dir_module modules/mod_dir.so LoadModule actions_module modules/mod_actions.so LoadModule speling_module modules/mod_speling.so LoadModule userdir_module modules/mod_userdir.so LoadModule alias_module modules/mod_alias.so LoadModule substitute_module modules/mod_substitute.so LoadModule rewrite_module modules/mod_rewrite.so LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so LoadModule proxy_ftp_module modules/mod_proxy_ftp.so LoadModule proxy_http_module modules/mod_proxy_http.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so LoadModule proxy_connect_module modules/mod_proxy_connect.so LoadModule cache_module modules/mod_cache.so LoadModule suexec_module modules/mod_suexec.so LoadModule disk_cache_module modules/mod_disk_cache.so LoadModule cgi_module modules/mod_cgi.so LoadModule version_module modules/mod_version.so Include conf.d/*.conf User apache Group apache ServerAdmin root@localhost UseCanonicalName Off DocumentRoot "/var/www/html" Options FollowSymLinks AllowOverride None Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all UserDir disabled DirectoryIndex index.html index.htm index.php AccessFileName .htaccess Order allow,deny Deny from all Satisfy All TypesConfig /etc/mime.types DefaultType text/plain MIMEMagicFile conf/magic HostnameLookups Off ErrorLog logs/error_log LogLevel warn LogFormat "%h %l %u %t \"%r\" %s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %s %b" common LogFormat "%{Referer}i - %U" referer LogFormat "%{User-agent}i" agent CustomLog logs/access_log combined ServerSignature On Alias /icons/ "/var/www/icons/" Options Indexes MultiViews FollowSymLinks AllowOverride None Order allow,deny Allow from all # Location of the WebDAV lock database. DAVLockDB /var/lib/dav/lockdb ScriptAlias /cgi-bin/ "/var/www/cgi-bin/" AllowOverride None Options None Order allow,deny Allow from all IndexOptions FancyIndexing VersionSort NameWidth=* HTMLTable Charset=UTF-8 AddIconByEncoding (CMP,/icons/compressed.gif) x-compress x-gzip AddIconByType (TXT,/icons/text.gif) text/* AddIconByType (IMG,/icons/image2.gif) image/* AddIconByType (SND,/icons/sound2.gif) audio/* AddIconByType (VID,/icons/movie.gif) video/* AddIcon /icons/binary.gif .bin .exe AddIcon /icons/binhex.gif .hqx AddIcon /icons/tar.gif .tar AddIcon /icons/world2.gif .wrl .wrl.gz .vrml .vrm .iv AddIcon /icons/compressed.gif .Z .z .tgz .gz .zip AddIcon /icons/a.gif .ps .ai .eps AddIcon /icons/layout.gif .html .shtml .htm .pdf AddIcon /icons/text.gif .txt AddIcon /icons/c.gif .c AddIcon /icons/p.gif .pl .py AddIcon /icons/f.gif .for AddIcon /icons/dvi.gif .dvi AddIcon /icons/uuencoded.gif .uu AddIcon /icons/script.gif .conf .sh .shar .csh .ksh .tcl AddIcon /icons/tex.gif .tex AddIcon /icons/bomb.gif core AddIcon /icons/back.gif .. AddIcon /icons/hand.right.gif README AddIcon /icons/folder.gif ^^DIRECTORY^^ AddIcon /icons/blank.gif ^^BLANKICON^^ DefaultIcon /icons/unknown.gif ReadmeName README.html HeaderName HEADER.html IndexIgnore .??* *~ # HEADER README* RCS CVS *,v *,t AddLanguage ca .ca AddLanguage cs .cz .cs AddLanguage da .dk AddLanguage de .de AddLanguage el .el AddLanguage en .en AddLanguage eo .eo AddLanguage es .es AddLanguage et .et AddLanguage fr .fr AddLanguage he .he AddLanguage hr .hr AddLanguage it .it AddLanguage ja .ja AddLanguage ko .ko AddLanguage ltz .ltz AddLanguage nl .nl AddLanguage nn .nn AddLanguage no .no AddLanguage pl .po AddLanguage pt .pt AddLanguage pt-BR .pt-br AddLanguage ru .ru AddLanguage sv .sv AddLanguage zh-CN .zh-cn AddLanguage zh-TW .zh-tw LanguagePriority en ca cs da de el eo es et fr he hr it ja ko ltz nl nn no pl pt pt-BR ru sv zh-CN zh-TW ForceLanguagePriority Prefer Fallback AddDefaultCharset UTF-8 AddType application/x-tar .tgz AddType application/x-httpd-php .php AddType application/x-httpd-php .xml AddHandler application/x-httpd-php .xml AddType application/x-compress .Z AddType application/x-gzip .gz .tgz AddType application/x-x509-ca-cert .crt AddType application/x-pkcs7-crl .crl AddHandler type-map var AddType text/html .shtml AddOutputFilter INCLUDES .shtml Alias /error/ "/var/www/error/" AllowOverride None Options IncludesNoExec AddOutputFilter Includes html AddHandler type-map var Order allow,deny Allow from all LanguagePriority en ForceLanguagePriority Prefer Fallback ErrorDocument 400 /error/HTTP_BAD_REQUEST.html.var ErrorDocument 401 /error/HTTP_UNAUTHORIZED.html.var ErrorDocument 403 /error/HTTP_FORBIDDEN.html.var ErrorDocument 404 /error/HTTP_NOT_FOUND.html.var ErrorDocument 405 /error/HTTP_METHOD_NOT_ALLOWED.html.var ErrorDocument 408 /error/HTTP_REQUEST_TIME_OUT.html.var ErrorDocument 500 /error/HTTP_INTERNAL_SERVER_ERROR.html.var ErrorDocument 503 /error/HTTP_SERVICE_UNAVAILABLE.html.var BrowserMatch "Mozilla/2" nokeepalive BrowserMatch "MSIE 4.0b2;" nokeepalive downgrade-1.0 force-response-1.0 BrowserMatch "RealPlayer 4.0" force-response-1.0 BrowserMatch "Java/1.0" force-response-1.0 BrowserMatch "JDK/1.0" force-response-1.0 BrowserMatch "Microsoft Data Access Internet Publishing Provider" redirect-carefully BrowserMatch "MS FrontPage" redirect-carefully BrowserMatch "^WebDrive" redirect-carefully BrowserMatch "^WebDAVFS/1.[0123]" redirect-carefully BrowserMatch "^gnome-vfs/1.0" redirect-carefully BrowserMatch "^XML Spy" redirect-carefully BrowserMatch "^Dreamweaver-WebDAV-SCM1" redirect-carefully Order allow,deny Allow from all # phpMyAdmin.conf Alias /phpMyAdmin /usr/share/phpMyAdmin Alias /phpmyadmin /usr/share/phpMyAdmin Order Allow,Deny Allow from All Allow from 127.0.0.1 Allow from ::1 Order Allow,Deny Allow from All Allow from 127.0.0.1 Allow from ::1 Order Deny,Allow Deny from All Allow from None Order Deny,Allow Deny from All Allow from None Order Deny,Allow Deny from All Allow from None Can anyone help into this area please. Urgent reply will be appreciatable because i am struggling since one and half month for this matter. thank you, Atul

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  • Showing an Action on a TopComponent Node

    - by Geertjan
    Let's say you want to extend the tools in NetBeans IDE, specifically for TopComponents. When the user right-clicks in the Projects window (or Files window or Favorites window) on a Java class that extends TopComponent, a menu item should be available for branding the TopComponent. What "branding" entails is, at this stage, a secondary question. The primary question, from an implementation point of view, is "how do I create an action that is only shown when the user right-clicks on a TopComponent?" Here's the solution, in NetBeans IDE 7.2 (the "lazy" attribute, here set to false, is new in 7.2): import com.sun.source.tree.ClassTree; import com.sun.source.util.TreePathScanner; import java.awt.event.ActionEvent; import java.io.IOException; import javax.lang.model.element.Element; import javax.lang.model.element.TypeElement; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.JOptionPane; import org.netbeans.api.java.source.CompilationController; import org.netbeans.api.java.source.CompilationInfo; import org.netbeans.api.java.source.JavaSource; import org.netbeans.api.java.source.JavaSource.Phase; import org.netbeans.api.java.source.Task; import org.openide.awt.ActionID; import org.openide.awt.ActionReference; import org.openide.awt.ActionReferences; import org.openide.awt.ActionRegistration; import org.openide.awt.DynamicMenuContent; import org.openide.loaders.DataObject; import org.openide.util.ContextAwareAction; import org.openide.util.Exceptions; import org.openide.util.Lookup; import org.openide.util.NbBundle.Messages; import org.openide.util.Utilities; @ActionID(     category = "Tools", id = "org.tc.customizer.BrandTopComponentAction") @ActionRegistration(     displayName = "#CTL_BrandTopComponentAction",     lazy = false) @ActionReferences({     @ActionReference(path = "Loaders/text/x-java/Actions", position = 150) }) @Messages("CTL_BrandTopComponentAction=Brand") public final class BrandTopComponentAction extends AbstractAction implements ContextAwareAction {     private final DataObject dobj;     public BrandTopComponentAction() {         this(Utilities.actionsGlobalContext());     }     public BrandTopComponentAction(Lookup context) {         super(Bundle.CTL_BrandTopComponentAction());         this.dobj = context.lookup(DataObject.class);         //Enable the menu item only if we're dealing with a TopComponent         JavaSource javaSource = JavaSource.forFileObject(dobj.getPrimaryFile());         try {             javaSource.runUserActionTask(new ScanForTopComponentTask(this), true);         } catch (IOException ex) {             Exceptions.printStackTrace(ex);         }         //Hide the menu item if it isn't enabled:         putValue(DynamicMenuContent.HIDE_WHEN_DISABLED, true);     }     @Override     public void actionPerformed(ActionEvent ev) {         JOptionPane.showMessageDialog(null, "Hurray, I am a TopComponent!");         //Now add your code for showing a dialog,         //where the dialog will display UI for branding the TopComponent somehow         //and retrieve those branding values         //and then change the TopComponent class accordingly.     }     @Override     public Action createContextAwareInstance(Lookup actionContext) {         return new BrandTopComponentAction(actionContext);     }     private static class ScanForTopComponentTask implements Task<CompilationController> {         private final BrandTopComponentAction action;         private ScanForTopComponentTask(BrandTopComponentAction action) {             this.action = action;         }         @Override         public void run(CompilationController compilationController) throws Exception {             compilationController.toPhase(Phase.ELEMENTS_RESOLVED);             new MemberVisitor(compilationController, action).scan(                     compilationController.getCompilationUnit(), null);         }     }     private static class MemberVisitor extends TreePathScanner<Void, Void> {         private CompilationInfo info;         private final AbstractAction action;         public MemberVisitor(CompilationInfo info, AbstractAction action) {             this.info = info;             this.action = action;         }         @Override         public Void visitClass(ClassTree t, Void v) {             Element el = info.getTrees().getElement(getCurrentPath());             if (el != null) {                 TypeElement te = (TypeElement) el;                 if (te.getSuperclass().toString().equals("org.openide.windows.TopComponent")){                     action.setEnabled(true);                 } else {                     action.setEnabled(false);                 }             }             return null;         }     } } The code above is the result of combining various tutorials found on the NetBeans Platform Learning Trail.

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  • [Java] Cannot draw pixels

    - by Wilhelm
    Hello everyone. I want to print each digit of pi number as a colored pixel, so, I get na input, with the pi number, then parse it into a list, each node containing a digit (I know, I'll use an array later), but I never get this painted to screen... Can someone help me to see where I'm wrong? package edu.pi.view; import java.awt.Graphics; import java.awt.Image; import java.awt.image.MemoryImageSource; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.util.ArrayList; import java.util.List; import javax.swing.JFrame; import javax.swing.JPanel; public class Main extends JPanel { private static final long serialVersionUID = 6416932054834995251L; private static int pixels[]; private static List<Integer> pi; public static void readFile(String name) { File file = new File(name); BufferedReader reader = null; pi = new ArrayList<Integer>(); char[] digits; try { reader = new BufferedReader(new FileReader(file)); String text = null; while((text = reader.readLine()) != null) { digits = text.toCharArray(); for(char el : digits) if(el != ' ') pi.add(Character.getNumericValue(el)); } } catch (Exception e) { e.printStackTrace(); } } public void paint(Graphics gg) { readFile("c:\\pi.txt"); int h = 5; int w = 2; int color = 0xffffff; int digit; int i = 0; pixels = new int[w * h]; for (int y = 0; y < h; y++) { for (int x = 0; x < h; x++) { digit = pi.get(i); if(digit == 0) color = 0x000000; else if(digit == 1) color = 0x787878; else if(digit == 2) color = 0x008B00; else if(digit == 3) color = 0x00008B; else if(digit == 4) color = 0x008B8B; else if(digit == 5) color = 0x008B00; else if(digit == 6) color = 0xCDCD00; else if(digit == 7) color = 0xFF4500; else if(digit == 8) color = 0x8B0000; else if(digit == 9) color = 0xFF0000; pixels[i] = color; i++; } } Image art = createImage(new MemoryImageSource(w, h, pixels, 0, w)); gg.drawImage(art, 0, 0, this); } public static void main(String[] args) { JFrame frame = new JFrame(); frame.getContentPane().add(new Main()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300,300); frame.setVisible(true); } }

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