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• links for 2011-01-03

  - by Bob Rhubart

  Using Solaris zfs + iscsi targets with Oracle VM (Wim Coekaerts Blog) "I was playing with my Oracle VM setup and needed some shared storage that was block based. I did not have a storage array available but I did have a Solaris box, that I use for Oracle VDI, available." - Wim Coekaerts (tags: oracle otn solaris oraclevm virtualization) DanT's GridBlog: Oracle Grid Engine: Changes for a Bright Future at Oracle "Today, we are entering a new chapter in Oracle Grid Engine’s life. Oracle has been working with key members of the open source community to pass on the torch for maintaining the open source code base to the Open Grid Scheduler project hosted on SourceForge." - Dan Templeton (tags: oracle gridengine) Oracle Fusion Middleware Security: How do I secure my services? "I've been up early for a couple of days talking to a customer about how they should secure their services,' says Chris Johnson. "I'm going to tell you what I told them." (tags: oracle fusionmiddleware security) OldSpice your Innovation - Dangers of Status Quo E2.0 | Enterprise 2.0 Blogs "If organizations only leverage E2.0 technologies in a 'me too' fashion, they are essentially using a bucket to bail water from a leaking ship." - John Brunswick (tags: oracle enteprise2.0) The Aquarium: GlassFish in 2011 - What to expect A look into the Glassfish crystal ball... (tags: oracle glassfish) Andrejus Baranovskis's Blog: Fusion Middleware 11g Security - Retrieve Security Groups from ADF 11g Oracle ACE Director Andrejus Baranovskis shows you what to do when you need to access security information directly from an ADF 11g application. (tags: oracle otn fusionmiddleware security adf) @eelzinga: Book review : Oracle SOA Suite 11g R1 Developer's Guide "What I really liked in this book...was the compare/description of the Oracle Service Bus. The authors did a great job on describing functionality of components existing in the SOA Suite and how to model them in your own process." - Oracle ACE Eric ElZinga (tags: oracle oracleace soa bookreview soasuite)

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• What's the proper way to merge two projects in source control software

  - by Mallow

  I'm using Fossil-SCM to maintain my projects. Since I don't work in a team I usually have just a very linear branch of development: 1.0 - 1.1 - 1.2 I'm wondering what the procedure is when you have one project who's task is about to be given to a related project. And thereby rendering the first project obsolete. Although I tend to rewrite most of my code if I don't remember having already written it, I still would like to keep the code archived. And I'ld rather not have a fossil repo that just is dead. Can I merge it? Is that the proper way of handling this? For example the code was extracting data from an excel file in order to format an HTML page. Now, I've convinced my employer to move their excel spreadsheet into a database to decrease redundancy, increase efficiency and yaddy yadda. Since I can now make logical queries that don't have to jump hoops to preform using the database I won't need the extra vbs files that originally manipulated the excel file. Technically I would be porting part of the existing code into the current new project. Since it already has it's own trunk, would it be advisable to combine the trunk of a different project to this one, and how would I do that exactly?? SO I guess my tree would look like this, and I haven't seen examples of software branching that resemble this inverted tree before so I'm wondering what the norm for a situation like this?

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• How can I use the dualforward parameter in my unity shader to use lightmaps and normal maps together?

  - by Raphaeltm

  I'm using the free version of unity and I would like to combine lightmaps with specularity and normal maps. After doing a -bunch- of research, I've figured out that there doesn't seem to be any easy way to do this in the free version of unity, which doesn't support deferred rendering/easy use of dual lightmaps. However, it looks like it's possible, by writing a custom shader, using the "dualforward" parameter in a shader, switching the lightmapping mode to "dual lightmaps" and turning on "Use in forward ren." (basically, writing a shader that specifies the use of dual lightmaps, which should allow for a combination of lightmaps and normal maps) So I downloaded the source code for the default shaders (because all I need is a normal specular bumped shader) and added "dualforward" to the parameters: Shader "Bumped Specular Dual Lightmaps" { Properties { _Color ("Main Color", Color) = (1,1,1,1) _SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 1) _Shininess ("Shininess", Range (0.03, 1)) = 0.078125 _MainTex ("Base (RGB) Gloss (A)", 2D) = "white" {} _BumpMap ("Normalmap", 2D) = "bump" {} } SubShader { Tags { "RenderType"="Opaque" } LOD 400 CGPROGRAM #pragma surface surf BlinnPhong dualforward sampler2D _MainTex; sampler2D _BumpMap; fixed4 _Color; half _Shininess; struct Input { float2 uv_MainTex; float2 uv_BumpMap; }; void surf (Input IN, inout SurfaceOutput o) { fixed4 tex = tex2D(_MainTex, IN.uv_MainTex); o.Albedo = tex.rgb * _Color.rgb; o.Gloss = tex.a; o.Alpha = tex.a * _Color.a; o.Specular = _Shininess; o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap)); } ENDCG } FallBack "Specular" } This, however, doesn't seem to work. When I keep the "dualforward" param, every object that uses it seems to be lit by the one directional light in the scene. When I remove the "dualforward" param, it they look like normal lightmapped objects with no normal maps or specularity. I noticed that the support for "dualforward" seems to be new in v.3.4.2, so I made sure to download it (I was running 3.4.1), but it still doesn't work. Anybody have any advice for me?

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• Ubuntu 12.04 Server ping gateway responds with destination host unreachable

  - by blckblttkd

  I consider myself fairly avid with Ubuntu and Linux, but this one has me stumped. I built up a Xen Server using Ubuntu 12.04 as the base operating system. It has multiple domUs running on it. My home network has a statically defined network where I got all the network connectivity going peachy. The server was moved to a permanent home this morning. So, the network configuration on the main system had to change. Again, another static network, but now I can't ping the upstream gateway from the host. As the VMs use this NIC over a bridge, they too are broken. Ping responds with "destination host unreachable." I simplified the networking down to a simple static network as seen below (no bridge or anything) just to get it to work. Here's the contents of my /etc/network/interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 216.7.188.228 gateway 216.7.188.225 netmask 255.255.255.240 broadcast 216.7.188.255 network 216.7.188.0 dns-nameservers 8.8.8.8 8.8.4.4 Here's the contents of route -n 0.0.0.0 216.7.188.225 0.0.0.0 UG 100 0 0 eth0 216.7.188.224 0.0.0.0 255.255.255.240 U 0 0 0 eth0 And the results of pinging the gateway: PING 216.7.188.225 (216.7.188.225) 56(84) bytes of data. From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable Again, this worked in one network flawlessly (obviously with different parameters in the interfaces file). I did try using eth1 (as there are two NICS on the server (in case the MAC address got flipped on bootup). No success there. Yes, the cable is in the right port now :) Any thoughts? I appreciate the help!

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• Non-Obvious Topics to Learn for Game Development

  - by ashes999

  I've been writing games for around 10 years now (from QBasic to C# and everything in-between). I need to start stretching my skills into different areas. What are other, surprising topics I should read up on? Expected topics would include the usual suspects: Programming language of your choice Scripting language Source control Project management (or Agile) Graphics API Maybe some AI (A* path-finding?) Physics (projectile physics) Unit testing (automated testing) I'm looking for more esoteric topics; things that you don't expect to need to know, but if you do know them, they make a difference. This could include things like: Art skills (drawing, lighting, colouring, layout, etc.) Natural language processing The physics of sound (sound-waves, doppler effect, etc.) Personally, I feel that having technical art skills (eg. can make decent art-work if you can only come up with ideas; or, following Photoshop/GIMP tutorials) was the most beneficial for me. This is not intended to be an open-ended question; I'm looking for specific skills that helped you and you expect will continue to benefit you in the short- and long-term.

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• Is it possible to to have all pre-unity effects in latest ubuntu?

  - by iamserious

  I've been an Ubuntu dilettante for a long, long time. It is not my primary OS but I've always had it on all my laptops and desktop machines for over 8 years now. What I really, really like(d) about ubuntu (or linux, for that matter) was the effects - desktop cube, wobbly windows and other such "cool" effects. Needless to say, I was heartbroken with Unity. I gave it the benefit of doubt and tried to like it, tried to love it. Stuck with it for over a year. But I recently came to the conclusion that unity is really not for me. I want my old ubuntu back, with all it's eye candy effects. I tried messing around with ccsm but it only seemed to make the matters worse. Now, I could just install the old version of ubuntu - but getting my bamboo pen and Nvidia to work with it is a son of a.. anyway, the point is, old version of ubuntu is outdated to work with my newer machines. I'd rather have a new version of ubuntu but without unity- I don't know what the eye candy stuff is called - and so my question is this - Is it possible to rid ubuntu of unity and get all the eye candy stuff and if it is not possible, can you please advice me what other linux supports all the effects, please? I've searched high and low for unity alternatives but didn't find any satisfactory solutions; so I think my question is mainly about what other linux flavour is better suited for the task - sorry if it is out of topic.

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• Why was my site rejected for Google Adsense?

  - by hyuun jjang

  I have a 3 year old blog and its got around 16 articles/tutorials about some programming problems and solutions. It's getting pretty much a lot of view lately so I decided to apply for a google adsense account. When I first applied via blogger, google replied with the following statement: Page Type: In order to participate in Google AdSense, publishers' websites and application information must satisfy the following guidelines: - Your website must be your own top-level domain (www.example.com and not www.example.com/mysite). - You must provide accurate personal information with your application that matches the information on your domain registration. - Your website must contain substantial, original content... So, as I understood it, I decide to buy a domain and point my blogger blog to that new naked domain. and here is the newly bought domain where all the contents of my old blog resides. http://icodeya.com/ I reapplied, hoping that this time, I will make the cut. But then I got this reply Further detail: Unable to review your site: While reviewing http://www.icodeya.com/, we found that your site was down or unavailable. We suggest you check whether there was a typo in the URL submitted. When your site is operational, you can resubmit your application with the correct site by following the directions below. I'm a bit disappointed. Maybe I did something wrong with DNS configuration or something. But you can clearly see that my site is fully functional. I heard that google sends robots to crawl on to the site etc. It's just sad because I invested on a domain name, and now I can't even find ways to earn from it. Any tips?

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• Bounding volume hierarchy - linked nodes (linear model)

  - by teodron

  The scenario A chain of points: (Pi)i=0,N where Pi is linked to its direct neighbours (Pi-1 and Pi+1). The goal: perform efficient collision detection between any two, non-adjacent links: (PiPi+1) vs. (PjPj+1). The question: it's highly recommended in all works treating this subject of collision detection to use a broad phase and to implement it via a bounding volume hierarchy. For a chain made out of Pi nodes, it can look like this: I imagine the big blue sphere to contain all links, the green half of them, the reds a quarter and so on (the picture is not accurate, but it's there to help understand the question). What I do not understand is: How can such a hierarchy speed up computations between segments collision pairs if one has to update it for a deformable linear object such as a chain/wire/etc. each frame? More clearly, what is the actual principle of collision detection broad phases in this particular case/ how can it work when the actual computation of bounding spheres is in itself a time consuming task and has to be done (since the geometry changes) in each frame update? I think I am missing a key point - if we look at the picture where the chain is in a spiral pose, we see that most spheres are already contained within half of others or do intersect them.. it's odd if this is the way it should work.

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• XNA: How to make the Vaus Spacecraft move left and right on directional keys pressed?

  - by Will Marcouiller

  I'm currently learning XNA per suggestion from this question's accepted answer: Where to start writing games, any tutorials or the like? I have then installed everything to get ready to work with XNA Game Studio 4.0. General Objective Writing an Arkanoid-like game. I want to make my ship move when I press either left or right keys. Code Sample protected override void Update(GameTime gameTime) { // Allows the game to exit if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed) this.Exit(); // TODO: Add your update logic here #if WINDOWS if (Keyboard.GetState().IsKeyDown(Keys.Escape)) this.Exit(); else { if (Keyboard.GetState().IsKeyDown(Keys.Left)) MoveLeft(gameTime); } #endif // Move the sprite around. BounceEnergyBall(gameTime); base.Update(gameTime); } void MoveLeft(GameTime gameTime) { // I'm not sure how to play with the Vector2 object and its position here!... _vausSpacecraftPos /= _vausSpacecraftSpeed.X; // This line makes the spacecraft move diagnol-top-left. } Question What formula shall I use, or what algorithm shall I consider to make my spaceship move as expected left and right properly? Thanks for your thoughts! Any clue will be appreciated. I am on my learning curve though I have years of development behind me (already)!

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• Oracle Java Olympics Between Russia, Ukraine, Belarus, Ukraine and Kazakhstan

  - by Tori Wieldt

  Last month, 151 universities in 11 locations (Saint-Petersburg, Moscow, Donetsk, Tomsk, Odessa, Rostov-on-Don, Ekaterinburg, Khabarovsk, Almaty, Kiev, and Samara) competed in the second round of the Oracle Java Olympics. For two weeks in February, the best university students from Russia, Ukraine, Belarus, Ukraine and Kazakhstan were invited to compete with each other and prove just how good they are in Java programming.  A team of engineers from Oracle Development center in Saint-Petersburg prepared the set of problems to solve during the competition. To win, participants needed to show deep knowledge of Java technologies from Classloader and NIO to Reflection and JavaDB. Students in each location had a PC with Oracle JDK 1.7u2 and Netbeans 7.1.  As a testing system, the organizers used the open source software Ejudge (with several tweaks specifically for the competition).  Participants submitted their solutions to the remote server where they were tested by prepared test harnesses. All results were posted in real-time. "I followed the competition coming in from the many sites, and it was a really exciting experience, like a horse race or football game!" exclaimed Java Evangelist Alexander Belokrylov. Congratulations to everyone who competed! The Olympic finals will on April 4th. 

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• why the difference in google search result using script for search and using a browser for search

  - by Jayapal Chandran

  I wrote a code to find the position in google search result for a search keyword. I also did the same with the browser. Both the results are different. Let me explain in detail here. I have a website and i wanted to know on which page number my domain appears for a search string. Like when i search for 'code snippets' i wanted to find in google search on which page number a certain domain appears. I wrote a php code to search page by page starting from page 1 to page n. I did the same task using a browser. The script returned page 4 and when browsed i can see the domain appearing in second page. here is the search string i use in my code. /search?hl=en&output=search&sclient=psy-ab&q=code+snippets&start=0&btnG= and for each request i change the start=0 to start=1, start=2, etc... and in the response i will check whether my domain appears in it. any idea for this different in search results?

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• Going on 15 months for me...

  - by Ratman21

  About 5 face to face interviews, 4 telephone ones and except for the two weeks Census Job. But, after 15 months looking for work, I am still with out a JOB. What is wrong here or with me? Let’s see, hard worker (check), self motivated to do well on a Job (Check), Certified CompTIA A+, Security+  and Network+ Technician (Check), 20 + years experience in “IT” (CHECK), in good health, in 20 years of work only 15 days off due to health issues (Check), 18 years experience as technical Help Desk support (Check), can still work better than younger personal (Check), Strong trouble shooting skills for software, computer hard ware and circuit issues (Check) and Multiple software languages (Hey I have done some programming) Check. Hmm I don’t see any problem with me (of course I could have missed something, please let me know if you see what I am missing).    Now as to what have I been up to since I last blogged. The same things of course, Job hunting, job hunting and study.   I have set up sim of my home LAN and will be adding a wireless print server to the sim and in real life, soon.  I was able to pull up and copy the examples of Cisco router commands that I had on my old lap top, to my newer PC. Every time I used a new command while working the NOC on my last job.   I would cut and past a copy of the command on the router (and what it did) I was working on.  Along with notes on the problem and commands use for same router. I used these to make documentation for on how to handle these types of issues, for the other Operation Techs. My old notes are helping me in studying for the CCENT test.    As to Love Dare, I think it will take more like 40 weeks, than the 40 days of the book. Yes I am making progress, slow but, it is progress. I will have more on that in my next blog.

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• install libreoffice in Ubuntu 12.04 is impossible

  - by user1587239

  What is wrong with Ubuntu repositories? sudo apt-get install libreoffice Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: libreoffice : Depends: libreoffice-core (= 1:3.5.4-0ubuntu1.1) but it is not going to be installed Depends: libreoffice-writer but it is not going to be installed Depends: libreoffice-calc but it is not going to be installed Depends: libreoffice-impress but it is not going to be installed Depends: libreoffice-draw but it is not going to be installed Depends: libreoffice-math but it is not going to be installed Depends: libreoffice-base but it is not going to be installed Depends: libreoffice-filter-mobiledev but it is not going to be installed Depends: libreoffice-java-common (>= 1:3.5.4~) but it is not going to be installed Recommends: libreoffice-gnome but it is not going to be installed or libreoffice-kde but it is not going to be installed E: Unable to correct problems, you have held broken packages.

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• What do I need to know to design a language and write a interpreter for it?

  - by alFReD NSH

  I know this question has been asked and even there are thousands of books and articles about it. But the problem is that there are too many, and I don't know are they good enough, I have to design a language and write a interpreter for it. The base language is javascript (using nodejs) but it's ok if the compiler was written in another language that I can use from node. I had done a research about compiler compilers in JS, there is jison (Bison implementaion in JS), waxeye, peg.js. I decided to give jison a try, due to the popularity and its being used by coffee script, so it should be able to cover my language too. The grammar definition syntax is similar to bison. But when I tried read the bison manual it seemed very hard to understand for me. And I think it's because I don't know a lot of things about what I'm doing. Like I don't what is formal language theory. I am experienced in Javascript (I'm more talented in JS than most average programmers). And also know basic C and C++ (not much experience but can write a working code for basic things). I haven't had any formal education, so I may not be familiar with some software engineering and computer science principles. Though everyday I try to grasp a lot of articles and improve. So I'm asking if you know any good book or article that can help me. Please also write why the resource you're suggesting is good. --update-- The language I'm trying to create, is not really complicated. All it has is expressions (with or without units), comparisons and logical operators. There are no functions, loops, ... The goal is to create a language that non-programmers can easily learn. And to write customized validations and calculations.

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• Hosting several HTTP servers on single domain name

  - by Nakilon

  Several people have got a single domain name server.company.com server, where they are now supposed to host their infrastructure or temporal projects, written in different ways even in different programming languages. How do they divide the domain? Split into subdomains: john.server.company.com, kate.server.company.com, etc. This would need a lot of admins' assistance, time, etc. -- there would be no way for John and Kate to do it themselves. Split into url namespaces: server.company.com/john/, server.company.com/kate/, etc. Pro: They now can make a single welcome page at root with any additional info (if they need?) Con: Each server would need to know their namespace string constant, and hrefs like / whould need patching. Split into ports: server.company.com:8080, server.company.com:8081, etc. and make a single :80 welcome page. Pro: They still can make a single welcome page at :80 Con: ??? I would like to know more pros and cons for 2 and 3 solution.

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• How to represent an agile project to people focused on waterfall [closed]

  - by ahsteele

  Our team has been asked to represent our development efforts in a project plan. No one is unhappy with our work or questioning our ability to deliver, we are just participating in an IT cattle call for project plans. Trouble is we are an agile team and haven't thought about our work in terms of a formal project plan. While we have a general idea of what we are working on next we aren't 100% sure until we plan an iteration. Until now our team has largely operated in a vacuum and has not been required to present our methodology or metrics to outside parties. We follow most of the practices espoused in Extreme Programming. We hold quarterly planning meetings to have a general idea of the stories we are going to work on for a quarter. That said, our stories are documented on 3x5 cards and are only estimated at the beginning of the iteration in which they are going to be worked. After estimation we document the story in Team Foundation Sever. During an iteration, we attach code to stories and mark stories as completed once finished. From this data we are able to generate burn down and velocity charts. Most importantly we know our average velocity for an iteration keeping us from biting off more than we can chew. I am not looking to modify the way we do development but want to present our development activities in a report that someone only familiar with waterfall will understand. In What Does an Agile Project Plan Look Like, Kent McDonald does a good job laying out the differences between agile and waterfall project plans. He specifies the differences in consumable bullets: An agile project plan is feature based An Agile Project Plan is organized into iterations An Agile Project Plan has different levels of detail depending on the time frame An Agile Project Plan is owned by the Team Being able to explain the differences is great, but how best to present the data?

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• How do I install the EW-7318Ug wireless drivers?

  - by user69731

  I'm on Ubuntu 12.04 and I need to install & configure Internet connection. I want to use montor mode in Wireshark. After Ubuntu installation my wireless card was recognized but it doesn't connect to the Internet. Internal wireless card works well. What should I do? I'm new to Linux. PC:~$ ifconfig -a eth0 Link encap:Ethernet HWaddr 64:31:50:0f:d4:70 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:45 Base address:0x8000 eth1 Link encap:Ethernet HWaddr e0:2a:82:aa:2d:3e inet addr:192.168.0.101 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::e22a:82ff:feaa:2d3e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:20978 errors:0 dropped:0 overruns:0 frame:364651 TX packets:20949 errors:171 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:19299119 (19.2 MB) TX bytes:3024858 (3.0 MB) Interrupt:19 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4788 errors:0 dropped:0 overruns:0 frame:0 TX packets:4788 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:387017 (387.0 KB) TX bytes:387017 (387.0 KB) wlan1 Link encap:Ethernet HWaddr 00:1f:1f:44:c1:a4 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:10508 errors:0 dropped:0 overruns:0 frame:0 TX packets:6143 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14831319 (14.8 MB) TX bytes:644606 (644.6 KB) PC:~$ iwconfig lo no wireless extensions. wlan1 IEEE 802.11bg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:on eth1 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:225 Noise level:162 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 eth0 no wireless extensions.

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• Top tweets SOA Partner Community – November 2012

  - by JuergenKress

  Dear SOA partner community member Too many different product from Oracle, no idea how do they fit together? Get a copy of the Oracle catalog, an excellent overview of the Oracle middleware portfolio. BPM is a key solution to this portfolio. To position BPM to your customers you can find many use case ideas in the paper BPM 11g Patterns and industry specific value propositions for Financial Services & Insurance & Retail. Many more Process Accelerators (11.1.1.6.2) have become available. It is an excellent demo and starting point for BPM projects. Our SOA Suite team published the most important OOW presentation at the OTN website. The Oracle SOA proactive support team is running a series of blog posts about SOA and JMS Introductory. To become an expert in SOA, Bob highlighted the latest list of SOA books. For OSB projects we recommend the EAIESB OSB poster. Thanks to all the experts who contributed and shared their SOA & BPM knowledge this month again. Please feel free to send us the link to your blog post via twitter @soacommunity: Undeploy multiple SOA composites with WLST or ANT by Danilo Schmiedel Fault Handling Slides and Q&A by Vennester Installing Oracle Event Processing 11g by Antoney Reynolds Expanding the Oracle Enterprise Repository with functional documentation by Marc Kuijpers Build Mobile App for E-Business Suite Using SOA Suite and ADF Mobile By Michelle Kimihira A brief note for customers running SOA Suite on AIX platforms By Christian ACM - Adaptive Case Management by Peter Paul BPM 11g - Dynamic Task Assignment with Multi-level Organization Units By Mark Foster Oracle Real User Experience Insight: Oracle's Approach to User Experience Hope to see you at the Middleware Day at UK Oracle User Group Conference 2012 in Birmingham. Jürgen Kress Oracle SOA & BPM Partner Adoption EMEA To read the newsletter please visit http://tinyurl.com/soanewsNovember2012 (OPN Account required) To become a member of the SOA Partner Community please register at http://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: SOA Community newsletter,SOA Community,Oracle SOA,Oracle BPM,BPM Community,OPN,Jürgen Kress

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• How do you encode Algebraic Data Types in a C#- or Java-like language?

  - by Jörg W Mittag

  There are some problems which are easily solved by Algebraic Data Types, for example a List type can be very succinctly expressed as: data ConsList a = Empty | ConsCell a (ConsList a) consmap f Empty = Empty consmap f (ConsCell a b) = ConsCell (f a) (consmap f b) l = ConsCell 1 (ConsCell 2 (ConsCell 3 Empty)) consmap (+1) l This particular example is in Haskell, but it would be similar in other languages with native support for Algebraic Data Types. It turns out that there is an obvious mapping to OO-style subtyping: the datatype becomes an abstract base class and every data constructor becomes a concrete subclass. Here's an example in Scala: sealed abstract class ConsList[+T] { def map[U](f: T => U): ConsList[U] } object Empty extends ConsList[Nothing] { override def map[U](f: Nothing => U) = this } final class ConsCell[T](first: T, rest: ConsList[T]) extends ConsList[T] { override def map[U](f: T => U) = new ConsCell(f(first), rest.map(f)) } val l = (new ConsCell(1, new ConsCell(2, new ConsCell(3, Empty))) l.map(1+) The only thing needed beyond naive subclassing is a way to seal classes, i.e. a way to make it impossible to add subclasses to a hierarchy. How would you approach this problem in a language like C# or Java? The two stumbling blocks I found when trying to use Algebraic Data Types in C# were: I couldn't figure out what the bottom type is called in C# (i.e. I couldn't figure out what to put into class Empty : ConsList< ??? >) I couldn't figure out a way to seal ConsList so that no subclasses can be added to the hierarchy What would be the most idiomatic way to implement Algebraic Data Types in C# and/or Java? Or, if it isn't possible, what would be the idiomatic replacement?

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• 12.0.4.3 - Missing Battery Icon, auto Suspend not working, Keyboard shortcuts volume up/down no longer working

  - by Navraj

  Problems I am experiencing: Battery Icon not showing up unity bar (top right corner). Volume Up/Down/Mute not working. Bluetooth hot keys described above also not working.Brightness up/down keys on this keyboard no longer working (apple wireless keyboard) Laptop no longer suspends when lid is shut. I have to go to 'power' button on top right corner and click on 'Suspend' All was working flawlessly until I did the following: I have recently upgraded to Nvidia propriety driver version 319 {version recommended}. Installed Xscreensaver and then removed it and went back to default screensaver. Done a system update (1st since installing) and now currently running: Linux 3.8.0-32-generic #47~precise1-Ubuntu SMP Wed Oct 2 16:19:35 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux NOTE: Base system was ubuntu 12.04.3 installed from ISO however lsb_release reports "No LSB modules are available" 4.installed psensor. I have check power setting (via Settings) and power setting via dconf-editor and set to recommended settings as described in posts detailing solution to this problem. - I have disabled 1) Nvdia settings at startup and 2) psensor at startup but this does not help. I am using an HP DV7 with 2GB Nvidia card. Not using any fancy graphics features. Recommendations? Thanks.

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• How to manage drawing loop when changing render targets

  - by George Duckett

  I'm managing my game state by having a base GameScreen class with a Draw method. I then have (basically) a stack of GameScreens that I render. I render the bottom one first, as screens above might not completely cover the ones below. I now have a problem where one GameScreen changes render targets while doing its rendering. Anything the previous screens have drawn to the backbuffer is lost (as XNA emulates what happens on the xbox). I don't want to just set the backbuffer to preserve its contents as I want this to work on the xbox as well as PC. How should I manage this problem? A few ideas I've had: Render every GameScreen to its own render target, then render them all to the backbuffer. Create some kind of RenderAction queue where a game screen (and anything else I guess) could queue something to be rendered to the back buffer. They'd render whatever they wanted to any render target as normal, but if they wanted to render to the backbuffer they'd stick that in a queue which would get processed once all rendertarget rendering was done. Abstract away from render targets and backbuffers and have some way of representing the way graphics flows and transforms between render targets and have something manage/work out the correct rendering order (and render targets) given what rendering process needs as input and what it produces as output. I think each of my ideas have pros and cons and there are probably several other ways of approaching this general problem so I'm interested in finding out what solutions are out there.

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• Where can I find design exercises to work on?

  - by Oak

  I feel it's important to continue practicing my problem-solving skills. Writing my own mini-projects is one way, but another is to try and solve problems posted online. It's easy to find interesting programming quizzes online that require applying clever algorithms to solve - Project Euler is one well-known example. However, in a lot of real-life projects the design of the software - especially in the initial phases - has a large impact and at later stages it cannot be tweaked as easily as plain algorithms. In order to improve these skills, I'm looking for any collection of design problems. When I say "design", I mean the abstract design of a software solution - for example what modules will there be and what are the dependencies between them, how data will flow in the program, what sort of data needs to be saved in the database, etc. Design problems are those problems that are critical to solve in the early stages of any project, but their solution is a whiteboard diagram without a single line of code. Of course these sort of problems do not have a single correct solution, but I'll be especially happy with any place that also displays pros and cons of the typical solutions that might be used to approach the problem.

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• Calculating 3d rotation around random axis

  - by mitim

  This is actually a solved problem, but I want to understand why my original method didn't work (hoping someone with more knowledge can explain). (Keep in mind, I've not very experienced in 3d programming, having only played with the very basic for a little bit...nor do I have a lot of mathematical experience in this area). I wanted to animate a point rotating around another point at a random axis, say a 45 degrees along the y axis (think of an electron around a nucleus). I know how to rotate using the transform matrix along the X, Y and Z axis, but not an arbitrary (45 degree) axis. Eventually after some research I found a suggestion: Rotate the point by -45 degrees around the Z so that it is aligned. Then rotate by some increment along the Y axis, then rotate it back +45 degrees for every frame tick. While this certainly worked, I felt that it seemed to be more work then needed (too many method calls, math, etc) and would probably be pretty slow at runtime with many points to deal with. I thought maybe it was possible to combine all the rotation matrixes involve into 1 rotation matrix and use that as a single operation. Something like: [ cos(-45) -sin(-45) 0] [ sin(-45) cos(-45) 0] rotate by -45 along Z [ 0 0 1] multiply by [ cos(2) 0 -sin(2)] [ 0 1 0 ] rotate by 2 degrees (my increment) along Y [ sin(2) 0 cos(2)] then multiply that result by (in that order) [ cos(45) -sin(45) 0] [ sin(45) cos(45) 0] rotate by 45 along Z [ 0 0 1] I get 1 mess of a matrix of numbers (since I was working with unknowns and 2 angles), but I felt like it should work. It did not and I found a solution on wiki using a different matirx, but that is something else. I'm not sure if maybe I made an error in multiplying, but my question is: this is actually a viable way to solve the problem, to take all the separate transformations, combine them via multiplying, then use that or not?

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• Low-level game engine renderer design

  - by Mark Ingram

  I'm piecing together the beginnings of an extremely basic engine which will let me draw arbitrary objects (SceneObject). I've got to the point where I'm creating a few sensible sounding classes, but as this is my first outing into game engines, I've got the feeling I'm overlooking things. I'm familiar with compartmentalising larger portions of the code so that individual sub-systems don't overly interact with each other, but I'm thinking more of the low-level stuff, starting from vertices working up. So if I have a Vertex class, I can combine that with a list of indices to make a Mesh class. How does the engine determine identical meshes for objects? Or is that left to the level designer? Once we have a Mesh, that can be contained in the SceneObject class. And a list of SceneObject can be placed into the Scene to be drawn. Right now I'm only using OpenGL, but I'm aware that I don't want to be tying OpenGL calls right in to base classes (such as updating the vertices in the Mesh, I don't want to be calling glBufferData etc). Are there any good resources that discuss these issues? Are there any "common" heirachies which should be used?

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• from MS Biology to BS Computer Science [on hold]

  - by Air Borne

  I'm Marco from Italy and I'd like to ask you a piece of advice about my career. I hold a Ms degree in Biology, I enjoyed a lot studying it and I got very good grades but I didn't know what to do with my degree in the real life. Few months ago, I began to read a book about Python programming (Introduction to Computer Science, Zelle J.) and I've great fun learning Python as a beginner, I wake up in the morning thinking about doing excersies and writing simple programs with python :) I'm also watching free lectures from MIT open courseware, and I'm feeling a certain degree of regrets for never asking myself what was computer science, since it seems to me it's a magic world. After weeks of doubts, I made a move :) I applied for a CS bachelor degree abroad, I got an interview and I'm going to start this great adventure next September. I feel incredibly excited at it, but a little bit scared too. Scared because sometimes I think I'm making a great mistake for my life restarting from a bachelor in a completely different area of study. Sometimes I hear people saying the IT market is bad, sometimes I hear other ones saying quite the opposite instead. Moreover, some colleagues of mine suggested me to try to get into Bioinformatics, instead of CS. My question is: I want to really discover if CS is for me, I mean the passion of my life. I know I'm just a beginner and I can't say nothing about it yet. What do you suggest me: CS or Bioinformatics? If I get a Bs in CS, could I get into bioinformatics without relevant experience, taking into account I have a Ms Biology degree? Any comment is appreciated, thanks in advance.

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