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• Emacs 24.1: How do I restore i-search Ctrl-Y behavior from older versions?

  - by Eric

  In emacs 24.1, when you do Ctrl-Y in an interactive search, it yanks the kill buffer into the search string ("it pastes the clipboard contents" in any-other-app's language) and tries to match it. In the last 20 versions or so, pressing Ctrl-Y matches the rest of the current line. I have two very common use cases: Match this line, revert the buffer, and search for the line (less often:) Where else is this text in the buffer? I tried modifying /lisp/isearch.el, switching the bindings for isearch-yank-line (which I want) and isearch-yank-kill (which I'm fine binding to the ridiculous \M-s\C-e key sequence). But I don't think this file even gets picked up. But I don't think this file even gets loaded. If I explicitly load it, I still get the 24.1 behavior. Here's my change: (add-hook 'isearch-mode-hook (lambda () (define-key isearch-mode-map "\C-y" 'isearch-yank-line) (define-key isearch-mode-map "\M-s\C-e" 'isearch-yank-kill) )) No change in the behavior. I even tried hacking isearch.el, still no change. This is on Windows btw, but I suspect it doesn't matter. Could someone tell me how I can restore the old binding?

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• Why did you start with Linux ? And why did you continue using it ?

  - by Stefano Borini

  I'd like to know the reasons that moved you towards Linux. Personally, I started because we had to use a Digital for the Fortran 77 exercises during my first year at the university. Linux was installed on many university computers, and I got interested in it. I always liked to code (on the C64) in basic and assembler, but I knew nothing about other languages. I soon discovered a chat engine called NUTS, and the idea of becoming proficient in C appealed me, so I started hacking the code. To do so, I needed a Unix at home, so I bought a Slackware 3.4 and installed it on my Pentium 166. I then continued using it for many years, reason being that I had pleasure in learning new things and the openness of information about the internals. It was a great learning platform. I then moved to osx because I enjoy the power of Unix with the beauty and efficiency of its interface. I am interested in your answer because I believe that the panorama has changed somehow. Although I still guess to find many "hackers" interested in Linux for the sake of knowledge, I also believe that there are other reasons (work, friends, bought a netbook).

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• Verizon overbilling me ?

  - by bek

  I have verizon air card for my internet. Which is called vz manager. I have had it for about a year. Keeping within my usage allowance the whole time until 3 months ago, when my bill came in my 5,000 g allowance was ran to 18,000. It has continued to do so through the last 3 months. My usage reset itself yesterday for the new month. I got on google for about 5 minutes and chatted for about an hour yesterday online. Mind you that I have never done anything any different then i do everyday. I do not download music or watch videos on my computer, nothing like that. Well since last night a 8 pm my usage sayd 1109.525 gb. ALREADY! For being on the internet for an hour with no downloads. What could be causing this, please thrown me some ideas. Verizon is checking on the problem, but that usually doesnt get me the answer i want. Can someone be hacking my card and using internet through it, has told me that that is not possible, however I think with the internet anytihng is possible.

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• VzAccess Manager.

  - by bek

  I have verizon air card for my internet. Which is called vz manager. I have had it for about a year. Keeping within my usage allowance the whole time until 3 months ago, when my bill came in my 5,000 g allowance was ran to 18,000. It has continued to do so through the last 3 months. My usage reset itself yesterday for the new month. I got on google for about 5 minutes and chatted for about an hour yesterday online. Mind you that I have never done anything any different then i do everyday. I do not download music or watch videos on my computer, nothing like that. Well since last night a 8 pm my usage sayd 1109.525 gb. ALREADY! For being on the internet for an hour with no downloads. What could be causing this, please thrown me some ideas. Verizon is checking on the problem, but that usually doesnt get me the answer i want. Can someone be hacking my card and using internet through it, has told me that that is not possible, however I think with the internet anytihng is possible.

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• List of Upcoming Appearances

  - by Chris Gardner

  Greetings. I know I have been in work sponsored hiding lately. We are working furiously on a beta project to secure a contract, and I can't really talk about it yet. Hopefully, the contracts will be soon signed. Not only will we then have money, but I can talk about all this really cool tech with which I have been playing. However, since the contract is not signed, I need to bring you people up to date with where I will be during the summer. Let's face it, you can't be a speaker / blogger without pandering to shameless self-promotion. First, I will, once again, be staffing the Hands-on-Labs at TechEd North America. Unfortunately, TechEd North America is already sold out for this year. However, if you're already going, drop by the labs and say Hi. Also, keep an eye on Twitter to track me throughout the event. Also, look for a post in a few hours with my specific picks for what content I'm looking forward to seeing this year. Immediately following TechEd North America, I will be flying into Knoxville to speak at CodeStock. I will be presenting my introduction and intermediate Xbox 360 development talks. There are a TON of great content at CodeStock this year, but there are only about 50 tickets left. After that whirlwind of work, things settle for awhile. That means I'm available to speak at your User Group, luncheon, bowling league, birthday party, anniversary, or bat mitzvah. Mid August brings us to That Conference. This one is going to be a blast. If you haven't heard of That Conference yet, you should really check it out. This will also be my introduction and intermediate Xbox 360 development talks. This is a new conference, and it looks like it will be a great one. Finally, we will turn our attention to DevLink. DevLink has the distinction of picking up my newest talk, Creating Stereoscopic 3D Graphics in XNA. On top of that, I'm giving an general Xbox 360 and Windows Phone 7 talk. DevLink has added an new "XNA and Kinect" track, so there will me a ton of great game content. That should bring us through the summer. As I solidify the Stereoscopic talk, look for some content on that to creep up on here. I will say it's the first topic I've played around with that is easier in 3D than 2D. Also, the organizers of Alabama Code Camp are still trying to reschedule the event. When that happens, I'll get that information out. Also, we are looking to expand our development team. If you are interested in working for / with me, keep an eye on the T & W Operations website. I know we're immediately looking for a junior level developer, but I think a few higher level position may come up soon. You MUST apply through the website, but drop me a personal line if you do apply. I'll keep an eye out for the application.

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• 256 Worker Role 3D Rendering Demo is now a Lab on my Azure Course

  - by Alan Smith

  Ever since I came up with the crazy idea of creating an Azure application that would spin up 256 worker roles (please vote if you like it ) to render a 3D animation created using the Kinect depth camera I have been trying to think of something useful to do with it. I have also been busy working on developing training materials for a Windows Azure course that I will be delivering through a training partner in Stockholm, and for customers wanting to learn Windows Azure. I hit on the idea of combining the render demo and a course lab and creating a lab where the students would create and deploy their own mini render farms, which would participate in a single render job, consisting of 2,000 frames. The architecture of the solution is shown below. As students would be creating and deploying their own applications, I thought it would be fun to introduce some competitiveness into the lab. In the 256 worker role demo I capture the rendering statistics for each role, so it was fairly simple to include the students name in these statistics. This allowed the process monitor application to capture the number of frames each student had rendered and display a high-score table. When I demoed the application I deployed one instance that started rendering a frame every few minutes, and the challenge for the students was to deploy and scale their applications, and then overtake my single role instance by the end of the lab time. I had the process monitor running on the projector during the lab so the class could see the progress of their deployments, and how they were performing against my implementation and their classmates. When I tested the lab for the first time in Oslo last week it was a great success, the students were keen to be the first to build and deploy their solution and then watch the frames appear. As the students mostly had MSDN suspicions they were able to scale to the full 20 worker role instances and before long we had over 100 worker roles working on the animation. There were, however, a few issues who the couple of issues caused by the competitive nature of the lab. The first student to scale the application to 20 instances would render the most frames and win; there was no way for others to catch up. Also, as they were competing against each other, there was no incentive to help others on the course get their application up and running. I have now re-written the lab to divide the student into teams that will compete to render the most frames. This means that if one developer on the team can deploy and scale quickly, the other team still has a chance to catch up. It also means that if a student finishes quickly and puts their team in the lead they will have an incentive to help the other developers on their team get up and running. As I was using “Sharks with Lasers” for a lot of my demos, and reserved the sharkswithfreakinlasers namespaces for some of the Azure services (well somebody had to do it), the students came up with some creative alternatives, like “Camels with Cannons” and “Honey Badgers with Homing Missiles”. That gave me the idea for the teams having to choose a creative name involving animals and weapons. The team rendering architecture diagram is shown below.   Render Challenge Rules In order to ensure fair play a number of rules are imposed on the lab. ·         The class will be divided into teams, each team choses a name. ·         The team name must consist of a ferocious animal combined with a hazardous weapon. ·         Teams can allocate as many worker roles as they can muster to the render job. ·         Frame processing statistics and rendered frames will be vigilantly monitored; any cheating, tampering, and other foul play will result in penalties. The screenshot below shows an example of the team render farm in action, Badgers with Bombs have taken a lead over Camels with Cannons, and both are  leaving the Sharks with Lasers standing. If you are interested in attending a scheduled delivery of my Windows Azure or Windows Azure Service bus courses, or would like on-site training, more details are here.

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• Oracle Social Network Developer Challenge: Fishbowl Solutions

  - by Kellsey Ruppel

  Originally posted by Jake Kuramoto on The Apps Lab blog. Today, I give you the final entry in the Oracle Social Network Developer Challenge, held last week during OpenWorld. This one comes from Friend of the ‘Lab and Fishbowl Solutions (@fishbowle20) hacker, John Sim (@jrsim_uix), whom you might remember from his XBox Kinect demo at COLLABORATE 12 (presentation slides and abstract) hacks and other exploits with WebCenter. We put this challenge together specifically for developers like John, who like to experiment with new tools and push the envelope of what’s possible and build cool things, and as you can see from his entry John did just that, mashing together Google Maps and Oracle Social Network into a mobile app built with PhoneGap that uses the device’s camera and GPS to keep teams on the move in touch. He calls it a Mobile GeoTagging Solution, but I think Avengers Assemble! would have equally descriptive, given that was obviously his inspiration. Here’s his description of the mobile app: My proposed solution was to design and simplify GeoLocation mapping, and automate updates for users and teams on the move; who don’t have access to a laptop or want to take their ipads out – but allow them to make quick updates to OSN and upload photos taken from their mobile device – there and then. As part of this; the plan was to include a rules engine that could be configured by the user to allow the device to automatically update and post messages when they arrived at a set location(s). Inspiration for this came from on{x} – automate your life. Unfortunately, John didn’t make it to the conference to show off his hard work in person, but luckily, he had a colleague from Fishbowl and a video to showcase his work.    Here are some shots of John’s mobile app for your viewing pleasure: John’s thinking is sound. Geolocation is usually relegated to consumer use cases, thanks to services like foursquare, but distributed teams working on projects out in the world definitely need a way to stay in contact. Consider a construction job. Different contractors all converge on a single location, and time is money. Rather than calling or texting each other and risking a distracted driving accident, an app like John’s allows everyone on the job to see exactly where the other contractors are. Using his GPS rules, they could easily be notified about how close each is to the site, definitely useful when you have a flooring contractor sitting idle, waiting for an electrician to finish the wiring. The best part is that the project manager or general contractor could stay updated on all the action (or inaction) using Oracle Social Network, either sitting at a desk using the browser app or desktop client or on the go, using one of the native mobile apps built for Oracle Social Network. I can see this being used by insurance adjusters too, and really any team that, erm, assembles at a given spot. Of course, it’s also useful for meeting at the pub after the day’s work is done. Beyond people, this solution could also be implemented for physical objects that are in route to a destination. Say you’re a customer waiting on rail shipment or a package delivery. You could track your valuable’s whereabouts easily as they report their progress via checkins. If they deviated from the GPS rules, you’d be notified. You might even be able to get a picture into Oracle Social Network with some light hacking. Thanks to John and his colleagues at Fishbowl for participating in our challenge. We hope everyone had a good experience. Make sure to check out John’s blog post on his work and the experience using Oracle Social Network. Although this is the final, official entry we had, tomorrow, I’ll show you the work of someone who finished code, but wasn’t able to make the judging event. Stay tuned.

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• Visual Studio 2012 and .NET 4.5 now Live!

  - by Tarun Arora

  Today was the formal launch event for Visual Studio 2012 and .NET 4.5, a state-of-the-art development solution for building modern applications that span connected devices and continuous services, from the client to the cloud. The event was streamed live from http://visualstudiolaunch.com, S.Somasegar corporate vice president of the Developer Division opened the key note, Jason Zander dived deeper into how to leverage Visual Studio 2012 and .NET 4.5 to build modern application. Brian Harry all the awesome features in Visual Studio 2012 to improve the application lifecycle management.   I. Summary of the announcements made today 1. Visual Studio Updates coming this fall –  VS Update will better support agile teams, enable continuous quality, elevate SharePoint development with application lifecycle management (ALM) tools, and expand Visual Studio 2012 Windows development capabilities. It will be available as a community technology preview (CTP) later this month and in final release later this calendar year. A comprehensive list of what will be on offer can be found here. 2. Visual Studio Express 2012 for Windows Desktop – Visual Studio Express 2012 for Windows Desktop brings the newest desktop development capabilities in Visual Studio 2012 to Express users, too. You would be excited to know that the express SKU will support Integration with TFS among some of the other cool features I would like to mention Unit Testing, Unit Testing, Code Analysis, dependency management with NuGet a full list and download links can be found here. 3. F# tools for Visual Studio Express 2012 for web –  This F# Tools release adds in F# 3.0 components, such as the F# 3.0 compiler, F# Interactive, IDE support, and new F# features such as type providers and query expressions to your Visual Studio 2012 express for web. More details and download links can be found here. 4. Visual Studio TFS 2012 Power Tools – The TFS 2012 Power tools brings the goodness of Best Practice Analyzer, Process Template Editor, Storyboard Shapes, Team Explorer enhancements, TFPT command line, TFS Server Backups, etc via to your TFS 2012 installation. It can be downloaded right away from here. II. Road shows There will be many more community road shows this month packaged with hours of demos and discussions. The Visual Studio UK Team has just announced that there will be four UK launch events, face to face session including a product group speaker and partner sessions: Edinburgh, 1st October Manchester, 3rd October London, 4th October Reading, 5th October III. Get Started Download Visual Studio 2012 and the additional supporting software's from here. The Visual Studio development team has put together over 60 videos to help you learn about the new Visual Studio 2012 capabilities in more detail, and all of these will be available for watching here. IV. What’s Next A lot more exciting stuff lined up… Windows 8 Anticipated release: Oct. 26 (UPDATED 9/12) Windows Server 2012 Released (UPDATED 9/4) System Center 2012 Released (UPDATED 9/11) SQL Server 2012 Released (UPDATED 4/2) Internet Explorer 10 Anticipated release: Between Q3 2012 and early 2013 (UPDATED 5/3   Office 2013 Anticipated release: Q4 2012 or Q1 2013(UPDATED 9/12) Exchange 2013 Anticipated release: Q4 2012 (UPDATED 7/26) Visual Studio 2012 Released (UPDATED 9/12) Kinect for Windows Released (UPDATED 9/4) Windows Phone "Tango" and 8 "Tango": Released; Anticipated "Windows Phone 8" release: Q4 2012 (UPDATED 9/5) Dynamics ERP Online Anticipated release: September or October 2012 (UPDATED 7/20) Office 365 Anticipated update schedule: "Almost weekly"(UPDATED 9/12) Windows Azure Rumored CTP release: Spring 2012 (UPDATED 9/7) SharePoint 2013 Anticipated release: Q4 2012 (UPDATED 8/21) Enjoy

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• It happens only at Devoxx ...

  - by arungupta

  After attending several Java conferences world wide, this was my very first time at Devoxx. Here are some items I found that happens only at Devoxx ... Pioneers of theater-style seating - This not only provides comfortable seating for each attendee but the screens are very clearly visible to everybody in the room. Intellectual level of attendees is very high - Read more explanation on the Java EE 6 lab blog. In short, a lab, 1/3 of the content delivered at Devoxx 2011, could not be completed at other developer days in more than 1/3 the time. Snack box for lunches - Even though this suits well to the healthy lifestyle of multiple-snacks-during-a-day style but leaves attendees hungry sooner in the day. The longer breaks before the next snack in the evening does not help at all. Fortunately, Azure cupcakes and Android ice creams turned out to be handy. I finally carried my own apple :-) Wrist band instead of lanyard - The good part about this is that once tied to your hand then you are less likely to forget in your room. But OTOH you are a pretty much a branded conference attendee all through out the city. It was cost effective as it costed 20c as opposed to 1 euro for the lanyard. Live streaming from theater #8 (the biggest room) on parleys.com All talks recorded and released on parleys.com over next year. This allows attendees to not to miss any session and watch replay at their own leisure. Stephan promised to start sharing the sessions by mid December this year. No need to pre-register for a session - This is true for most of the conferences but bigger rooms (+ overflow room for key sessions) provide sufficient space for all those who want to attend the session. And of course all sessions are available on parleys.com anyway! Community votes on whiteboard - Devoxx attendees gets a chance to vote on topics ranging from their favorite non-Java language, operating system, or love from Oracle. Captured pictures at the end of Day 2 are shown below. Movie on the last but one night - This year it was The Adventures of Tintin and was lots of fun. Fries with mayo - This is a typical Belgian thing. Guys going in ladies room to avoid the long queues ... wow! Tweet wall everywhere and I mean literally everywhere, in rooms, hallways, front desk, and other places. The tweet picking algorithm was not very clear as I never saw my tweet appear on the wall ;-) You can also watch it at wall.devoxx.com. Cozy speaker dinner with great food and wine List of parallel and upcoming sessions displayed on the screen - This makes the information more explicit with the attendees. REST API with multiple mobile clients - This API is also used by some other conferences as well. And there always is iphone.devoxx.com. Steering committee members were recognized multiple times. The committee members were clearly identifiable wearing red hoodies. The wireless SSID was intuitive "Devoxx" but hidden to avoid some crap from Microsoft Windows. All of 9000 addresses were used up most of the times with each attendee having multiple devices. A 1 GB fibre optic cable was stretched to Metropolis to support the required network bandwidth. Stephan is already planning to upgrade the equipment and have a better infrastructure next year. Free water, soda, juice in a cooler Kinect connected to TV screens so that attendees can use their hands to browse through the list of sesssions. #devoxxblog, #devoxxwomen, #devoxxfrance, #devoxxgreat, #devoxxsuggestions And Devoxx attendees are called Devoxxians ... how cool is that ? :-) What other things do you think happen only at Devoxx ? And now the pictures from the community whiteboard: And a more complete album (including bigger pics of community votes) is available below:

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• Dallas First Regionals 2012&ndash; For Inspiration and Recognition of Science and Technology

  - by T

  Wow!  That is all I have to say after the last 3 days. Three full fun filled days in a world that fed the geek, sparked the competitor, inspired the humanitarian, encouraged the inventor, and continuously warmed my heart.  As part of the Dallas First Regionals, I was awed by incredible students who teach as much as they learn, inventive and truly caring mentors that make mentoring look easy, and completely passionate and dedicated volunteers that bring meaning to giving all that you have and making events fun and safe for all.  If you have any interest in innovation, robotics, or highly motivated students, I can’t recommend anything any higher than visiting a First Robotics event. This is my third year with First and I was honored enough to serve the Dallas First Regionals as both a Web Site evaluator and as the East Field Volunteer Coordinator.  This was also the first year my daughter volunteered with me.  My daughter and I both recognize how different the First program is from other team events.  The difference with First is that everyone is a first class citizen.   It is a difference we can feel through experiencing and observing interactions between executives, respected engineers, students, and event staff.  Even with a veracious competition, you still find a lot of cooperation and we never witnessed any belittling between teams or individuals. First Robotics coined the term “Gracious Professionalism”.   It's a way of doing things that encourages high-quality work, emphasizes the value of others, and respects individuals and the community.1 I was introduced to this term as the Volunteer Coordinator when I was preparing the volunteer instructional speech.  Through the next few days, I discovered it is truly core to everything that First does.  One of the ways First accomplishes Gracious Professionalism is by utilizing another term they came up with which is “CoopertitionTM”. At FIRST, CoopertitionTM is displaying unqualified kindness and respect in the face of fierce competition.1   One of the things I never liked about sports was the need to “destroy” the other team.  First has really found a way to integrate CoopertitionTM  into the rules so teams can be competitive and part of that competition rewards cooperation. Oh and did I mention it has ROBOTS!!!  This year it had basket ball playing Kinect connected, remote controlled, robots!  There are not words for how exciting these games are.  You HAVE to check out this years game, Rebound Rumble, on youtube or you can view live action on Dallas First Video (as of this posting, the recording haven’t posted yet but should be there soon).  There are also some images below. Whatever it is, these students get it and exemplify it and these mentors ooze with it.  I am glad that First supports these events so we can all learn and be inspired by these exceptional students and mentors.  I know that no matter how much I give, it will never compare to what I gain volunteering at First.  Even if you don’t have time to volunteer, you owe it to yourself to go check out one of these events.  See what the future holds, be inspired, be encouraged, take some knowledge, leave some knowledge and most of all, have FUN.  That is what First is all about and thanks to First, I get it.   First Dallas Regionals 2012 VIEW SLIDE SHOW DOWNLOAD ALL 1.  USFirst http://www.usfirst.org/aboutus/gracious-professionalism

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• Perspective Is Everything

  - by juanlarios

  Sitting on a window seat on my way back from Seattle I looked out the window and saw the large body of water. I was reminded of childhood memories of running as hard as I could through burning hot sand with the anticipation of the splash of the ocean. Looking out the window the water appeared like a sheet draped over land. I couldn’t help but ponder how perspective changes everything.  Over the last several days I had a chance to attend the MVP Summit in Redmond. I had a great time with fellow MVP’s and the SharePoint Product Group. Although I can’t say much about what was discussed and what is coming in the future, I want to share some realizations I had while experiencing the MVP summit.  The SharePoint Product is ever-improving, full of innovation but also a reactionary embodiment of MVP, client and market feedback. There are several features that come to mind that clients complain about where I have felt helpless in informing them that the features are not as mature as they would like it. Together, we figure out a way to make it work and deal with the limitations. It became clear that there are features that have taken a different purpose in the market place from the original vision. The SP Product group is working hard to react to these changes in vision and make SharePoint better for real life implementations.  It is easy to think that SharePoint should be all things to all people. In reality there are products that are very detailed in specific composites, they do this one thing well but severely lack in other areas.  Its easy sometimes to say, “What was Microsoft thinking with this feature?” the Product group is doing all they can to make the moving pieces better and dealing with challenges with having all of them work together.  Sometimes the features don’t fully embody the vision because of the many challenges, but trust me when I say the product group is really focused on delivery and innovation.  As I was speaking with a fellow MVP throughout the session, we spoke about the iPad 2(ironically announced this past week during the MVP summit) and Microsoft’s possible product answer; I realized the days of reactionary products from MS is over. There are many users that will remember Vista and the painful execution in that product, but there has been a lot of success in Windows 7. There was no rush for a reactionary answer to the Nintendo Wii, as a result a ground breaking and game changing product was brought to market, the XBOX –Kinect! I can’t say much here, but it’s safe to say, expect innovation, and execution of products and technology that will change the market instead of react to them!       There are many things I learned and I would love to share that have to do with perspective, technology, etc… but this is far as I can go in details. This might not be new to you or specifically the message that was shared during the summit. These are just my impressions of the event and the spirit of future vision. Great things ahead!

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• Two Weeks To Go, Still Time to Register

  - by speakjava

  Yes, it's now only two weeks to the start of the 17th JavaOne conference! This will be my ninth JavaOne, I came fairly late to this event, attending for the first time in 2002.  Since then I've missed two conferences, 2006 for the birth of my son (a reasonable excuse I think) and 2010 for reasons we'll not go into here.  I have quite the collection of show devices, I've still got the WoWee robot, the HTC phone for JavaFX, the programmable pen and the Sharp Zaurus.  The only one I didn't keep was the homePod music player (I wonder why?) JavaOne is a special conference for many reasons, some of which I list here: A great opportunity to catch up on the latest changes in the Java world.  This is not just in terms of the platform, but as much about what people are doing with Java to build new and cool applications. A chance to meet people.  We have these things called BoFs, which stands for "Birds of a Feather", as in "Birds of a feather, flock together".  The idea being to have sessions where people who are interested in the same topic don't just get to listen to a presentation, but get to talk about it.  These sessions are great, but I find that JavaOne is as much about the people I meet in the corridors and the discussions I have there as it is about the sessions I get to attend. Think outside the box.  There are a lot of sessions at JavaOne covering the full gamut of Java technologies and applications.  Clearly going to sessions that relate to your area of interest is great, but attending some of the more esoteric sessions can often spark thoughts and stimulate the imagination to go off and do new and exciting things once you get back. Get the lowdown from the Java community.  Java is as much about community as anything else and there are plenty of events where you can get involved.  The GlassFish party is always popular and for Java Champions and JUG leaders there's a couple of special events too. Not just all hard work.  Oracle knows how to throw a party and the appreciation event will be a great opportunity to mingle with peers in a more relaxed environment.  This year Pearl Jam and Kings of Leon will be playing live.  Add free beer and what more could you want? So there you have it.  Just a few reasons for why you want to attend JavaOne this year.  Oh, and of course I'll be presenting three sessions which is even more reason to go.  As usual I've gone for some mainstream ("Custom Charts" for JavaFX) and some more 'out there' ("Java and the Raspberry Pi" and "Gestural Interfaces for JavaFX").  Once again I'll be providing plenty of demos so more than half my luggage this year will consist of a Kinect, robot arm, Raspberry Pis, gamepad and even an EEG sensor. If you're a student there's one even more attractive reason for going to JavaOne: It's Free! Registration is here.  Hope to see you there!

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• Write-only collections in MongoDB

  - by rcoder

  I'm currently using MongoDB to record application logs, and while I'm quite happy with both the performance and with being able to dump arbitrary structured data into log records, I'm troubled by the mutability of log records once stored. In a traditional database, I would structure the grants for my log tables such that the application user had INSERT and SELECT privileges, but not UPDATE or DELETE. Similarly, in CouchDB, I could write a update validator function that rejected all attempts to modify an existing document. However, I've been unable to find a way to restrict operations on a MongoDB database or collection beyond the three access levels (no access, read-only, "god mode") documented in the security topic on the MongoDB wiki. Has anyone else deployed MongoDB as a document store in a setting where immutability (or at least change tracking) for documents was a requirement? What tricks or techniques did you use to ensure that poorly-written or malicious application code could not modify or destroy existing log records? Do I need to wrap my MongoDB logging in a service layer that enforces the write-only policy, or can I use some combination of configuration, query hacking, and replication to ensure a consistent, audit-able record is maintained?

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• How to add dynamic profile fields in Invision Power Board?

  - by user361908

  I run a game server and want to link the persons in game character name and stats to Invision Power Board. I've setup IPB so players currently login with their in game login. That means their username on the forum is the same as their username for the game. They can have multiple characters on 1 account so ideally I'd like to allow them to choose a main character and display an actual image of that character and allow them to display other characters if they are online. Currently I'm doing something like this by hacking profileFields.php but it's messy and not very efficient on the user or server end. My code currently uses 2 custom fields which the player can enter their character names in. To display only their main character they enter the name in the first field. To also display other characters if they are online they enter the same name into the second field. To resolve the IDs I have to run a lot of queries. I know PHP but I am not familiar with IPBs code at all. I just need pointed in a direction where I can combine the 2 fields into 1 field. tl;dr: Here is my setup: Invision Power Board 3 Data is stored in MySQL on the same server the forum is hosted on. Usernames on the forum are identical to usernames in the game Here is a breakdown of what I'd like to do: In the edit profile section I need to resolve the forum username to the games account id then: Display a list of characters and allow them to choose which characters they want to display if they are online as well as a default character that will be displayed if none are online. In the posts user info pane: Display the online character or the default if none are online. Here is what I need to know: How to generate a list of characters in the profile edit form and allow selection (checkbox) of each character to display as well as the selection of a default character (radio or dropdown?) How to fetch the data and place it in the posts user info pane

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• OAuth with Google Reader API using Objective C

  - by Dylan

  I'm using the gdata OAuth controllers to get an OAuth token and then signing my requests as instructed. [auth authorizeRequest:myNSURLMutableRequest] It works great for GET requests but POSTs are failing with 401 errors. I knew I wouldn't be able to remain blissfully ignorant of the OAuth magic. The Google Reader API requires parameters in the POST body. OAuth requires those parameters to be encoded in the signature like they were on the query string. It doesn't appear the gdata library does this. I tried hacking it in the same way it handles the query string but no luck. This is so difficult to debug as all I get is a 401 from the Google black box and I'm left to guess. I really want to use OAuth so I don't have to collect login credentials from my users but I'm about to scrap it and go with the simpler cookie based authentication that is more mature. It's possible I'm completely wrong about the reason it's failing. This is my best guess. Any suggestions for getting gdata to work or maybe an alternative iphone friendly OAuth library?

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• Creating ViewResults outside of Controllers in ASP.NET MVC

  - by Craig Walker

  Several of my controller actions have a standard set of failure-handling behavior. In general, I want to: Load an object based on the Route Data (IDs and the like) If the Route Data does not point to a valid object (ex: through URL hacking) then inform the user of the problem and return an HTTP 404 Not Found Validate that the current user has the proper permissions on the object If the user doesn't have permission, inform the user of the problem and return an HTTP 403 Forbidden If the above is successful, then do something with that object that's action-specific (ie: render it in a view). These steps are so standardized that I want to have reusable code to implement the behavior. My current plan of attack was to have a helper method to do something like this: public static ActionResult HandleMyObject(this Controller controller, Func<MyObject,ActionResult> onSuccess) { var myObject = MyObject.LoadFrom(controller.RouteData). if ( myObject == null ) return NotFound(controller); if ( myObject.IsNotAllowed(controller.User)) return NotAllowed(controller); return onSuccess(myObject); } # NotAllowed() is pretty much the same as this public static NotFound(Controller controller){ controller.HttpContext.Response.StatusCode = 404 # NotFound.aspx is a shared view. ViewResult result = controller.View("NotFound"); return result; } The problem here is that Controller.View() is a protected method and so is not accessible from a helper. I've looked at creating a new ViewResult instance explicitly, but there's enough properties to set that I'm wary about doing so without knowing the pitfalls first. What's the best way to create a ViewResult from outside a particular Controller?

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• Create custom rewrite rule for my WordPress plugin

  - by kitsched

  I'm writing a plug-in for WordPress which in fact will be a separate ordering module (it will be placed in an IFRAME on the site I'm developing as well as others) but with its admin tied into WordPress. I wrote the administration part without too much hassle, however I'm having trouble with the front-end. First of all I'd like my script to be accessible via www.mysite.com/order/ and, as per the WordPress codex, I found I need to place the following code into my main plugin file: add_action('init', 'ta_flush_rewrite_rules'); function ta_flush_rewrite_rules() { global $wp_rewrite; $wp_rewrite->flush_rules(); } add_action('generate_rewrite_rules', 'ta_add_rewrite_rules'); function ta_add_rewrite_rules( $wp_rewrite ) { $new_rules = array("order/(.+)" => "/wp-content/plugins/my-plugin/order.php"); $wp_rewrite->rules = $new_rules + $wp_rewrite->rules; } But it doesn't work and I don't really want to get dirty with .htaccess hacking. Furthermore even if this would work, the order.php file is a separate file from my plugin. This means that I'll have to include some WordPress files in order to have access to the database and other helper classes and functions. That brings us to question number 2: is there a way for the URL to call a function of my plugin to render the order page?

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• Jeditable Datepicker onblur problem

  - by Shobha Deepthi

  Hi, I am using inline editing using Jeditable and datepicker. I have a column in my table which displays Date as a hyperlink. When I click on this it shows me the datepicker. And when a particular date is selected its updated in the backend and the cell now is updated with the changed value. However, am having problem with onblur event while changing month or years. This event gets triggered when I click on "Prev" or "Next" buttons on the datepicker control. This causes an exception when the date is selected. This works fine as long as the date selected is in the current month. I tried all possible solutions listed here: stackoverflow.com/questions/2007205/jeditable-datepicker-causing-blur-when-changing-month If settimeout the control does not change back to a normal hyperlink on closing the datepicker or on a true onblur event. Here's my code, $.editable.addInputType('datepicker', { element : function(settings, original) { var input = $(''); if (settings.width != 'none') { input.width(settings.width); } if (settings.height != 'none') { input.height(settings.height); } input.attr('autocomplete','off'); $(this).append(input); return(input); }, plugin : function(settings, original) { var form = this; settings.onblur = function(e) { t = setTimeout(function() { original.reset.apply(form, [settings, self]); }, 100); }; $(this).find('input').datepicker({ changeMonth: true, changeYear: true, dateFormat: 'dd-M-y', closeAtTop: true, onSelect: function(dateText) { $(this).hide(); $(form).trigger('submit'); } }); }, submit : function(settings, original) { } }); $(function() { $('.edit_eta').editable('update_must_fix_eta.php', { id: 'bugid', name: 'eta', type: 'datepicker', event: 'click', select : true, width: '50px', onblur:'cancel', cssclass : 'editable', indicator : 'Updating ETA, please wait.', style : 'inherit', submitdata:{version:'4.2(4)',tag:'REL_4_2_4',qstr:1} }); }); I tried hacking jeditable.js as mentioned on this link: http://groups.google.com/group/jquery-dev/browse_thread/thread/265340ea692a2f47 Even this does not help. Any help is appreciated.

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• Symfony forms question (restoring selected value of a dynamically populated sfWidgetFormSelect widge

  - by Stick it to THE MAN

  I am using Symfony 1.3.2 with Propel ORM on Ubuntu 9.10. I have developed a form that dynamically populates a select widget with cities in a selected country, using AJAX. Before the data entered on the form is saved, I validate the form. If validation fails, the form is presented back to the user for correction. However, because the country list is dynamically generated, the form that is presented for correction does not have a valid city selected (it is empty, since the country widget has not changed yet). This is inconvenient for the user, because it means they have to select ANOTHER country (so the change event is fired), and then change back to the original country they selected, then FINALLY select the city which they had last selected. All of this is forced on the user because another (possibly unrelated) field did not vaildate. I tried $form-getValue('widget_name'), called immediately after $form-bind(), but it seems (infact, IIRC, if form fails to validate, all the values are reset to null) - so that does not work. I am currently trying a nasty hack which involves the use of directly accesing the input (i.e. tainted) data via $_POST, and setting them into a flash variable - but I feel its a very nasty hack) What I'm trying to do is a common use case scenario - is there a better way to do this, than hacking around with $_POST etc?

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• ProgrammingError when aggregating over an annotated & grouped Django ORM query

  - by ento

  I'm trying to construct a query to get the "average, maximum, minimum number of items purchased by a single user". The data source is this simple sales record table: class SalesRecord(models.Model): id = models.IntegerField(primary_key=True) user_id = models.IntegerField() product_code = models.CharField() price = models.IntegerField() created_at = models.DateTimeField() A new record is inserted into this table for every item purchased by a user. Here's my attempt at building the query: q = SalesRecord.objects.all() q = q.values('user_id').annotate( # group by user and count the # of records count=Count('id'), # (= # of items) ).order_by() result = q.aggregate(Max('count'), Min('count'), Avg('count')) When I try to execute the code, a ProgrammingError is raised at the last line: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM (SELECT sales_records.user_id AS user_id, COUNT(sales_records.`' at line 1") Django's error screen shows that the SQL is SELECT FROM (SELECT `sales_records`.`player_id` AS `player_id`, COUNT(`sales_records`.`id`) AS `count` FROM `sales_records` WHERE (`sales_records`.`created_at` >= %s AND `sales_records`.`created_at` <= %s ) GROUP BY `sales_records`.`player_id` ORDER BY NULL) subquery It's not selecting anything! Can someone please show me the right way to do this? Hacking Django I've found that clearing the cache of selected fields in django.db.models.sql.BaseQuery.get_aggregation() seems to solve the problem. Though I'm not really sure this is a fix or a workaround. @@ -327,10 +327,13 @@ # Remove any aggregates marked for reduction from the subquery # and move them to the outer AggregateQuery. + self._aggregate_select_cache = None + self.aggregate_select_mask = None for alias, aggregate in self.aggregate_select.items(): if aggregate.is_summary: query.aggregate_select[alias] = aggregate - del obj.aggregate_select[alias] + if alias in obj.aggregate_select: + del obj.aggregate_select[alias] ... yields result: {'count__max': 267, 'count__avg': 26.2563, 'count__min': 1}

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• Best practice for defining CSS rules via JavaScript

  - by Tim Whitlock

  I'm loading a stylesheet that is only required when javascript is enabled. More to the point, it mustn't be present if JavaScript is disabled. I'm doing this as soon as possible (in the head) before any javascript libraries are loaded. (I'm loading all scripts as late as possible). The code for loading this stylesheet externally is simple, and looks like this: var el = document.createElement('link'); el.setAttribute('href','/css/noscript.css'); el.setAttribute('rel','stylesheet'); el.setAttribute('type','text/css'); document.documentElement.firstChild.appendChild(el); It's working fine, but all my CSS file contains at the moment is this: .noscript { display: none; } This doesn't really warrant loading a file, so I'm thinking of just defining the rule dynamically in JavaScript. What's best practice for this?. A quick scan of various techniques shows that it requires a fair bit of cross-browser hacking. P.S. pleeease don't post jQuery examples. This must be done with no libraries.

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• Google App Engine application instance recycling and response times...

  - by Konrad

  Hi, I posted this on GAE for Java group, but I hope to get some answers here quicker :) I decided to do some long-run performance tests on my application. I created some small client hitting app every 5-30 minutes and I run 3-5 of threads with such client. I noticed huge differenced in response times and started to investigate issue. I found reason very quick. I am experiencing same issues as described in following topics: Uneven response time between connection to server to first byte sent Application instances seem to be too aggressively recycled Getting 'Request was aborted after waiting too long to attempt to service your request.' after application idle I am using Springframework, it tkes around 18-20s to start app instance, which is causing response times to take from 1s (when requests hits running app - very rare) to 22s when fresh application is created. Is there any solution for this? I was thinking about creating most basic servlet performing critical tasks (serving API call) and leave UI as is. But then I would loose all benefits of Springframework. Is there any solution for this? After solving (hacking) numerous constrains of App Engine which I hit while developing my app that is the one I think will make me move out of App Engine... that's simply to much to all the time think how to win with GAE problems than how to solve my application problems... Any help? Regards Konrad

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• Workflow Service host not publishing Metadata.

  - by jlafay

  Still hacking away with extreme persistence at WF services hosted outside of IIS. I'm now having issues with my WF service publishing metadata. Can someone take a look at my code and see what step I'm missing? The few tutorials that I've stumbled across for my scenario make it look so easy, and I know it is. I'm just missing something ridiculously simple. Here's my current trial code: const string serviceUri = "http://localhost:9009/Subscribe"; WorkflowServiceHost host = new WorkflowServiceHost( new Subscribe(), new Uri(serviceUri) ); SubscriberSvcHost.AddDefaultEndpoints( ); SubscriberSvcHost.Open(); Subscribe() is an activity that is coded in an xaml file and contains simple receive and sendreply activities to test out my hosted workflow service. It is NOT a xamlx (WF service) file. Seems like this should be simple enough to work but when I start the application and the service fires I get this message in my browser when navigating to the URI: "Metadata publishing for this service is currently disabled." Shouldn't adding the default endpoints provide enough metadata and description to satisfy the service init and then go into its wait for message state?

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• Can I make a "TCP packet modifier" using tun/tap and raw sockets?

  - by benhoyt

  I have a Linux application that talks TCP, and to help with analysis and statistics, I'd like to modify the data in some of the TCP packets that it sends out. I'd prefer to do this without hacking the Linux TCP stack. The idea I have so far is to make a bridge which acts as a "TCP packet modifier". My idea is to connect to the application via a tun/tap device on one side of the bridge, and to the network card via raw sockets on the other side of the bridge. My concern is that when you open a raw socket it still sends packets up to Linux's TCP stack, and so I couldn't modify them and send them on even if I wanted to. Is this correct? A pseudo-C-code sketch of the bridge looks like: tap_fd = open_tap_device("/dev/net/tun"); raw_fd = open_raw_socket(); for (;;) { select(fds = [tap_fd, raw_fd]); if (FD_ISSET(tap_fd, &fds)) { read_packet(tap_fd); modify_packet_if_needed(); write_packet(raw_fd); } if (FD_ISSET(raw_fd, &fds)) { read_packet(raw_fd); modify_packet_if_needed(); write_packet(tap_fd); } } Does this look possible, or are there other better ways of achieving the same thing? (TCP packet bridging and modification.)

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• Contributing to a Linux distribution

  - by Big Al

  I'm interested in contributing to a Linux distro, but regarding the various distro's developer communities, I'm having a bit of trouble figuring out which one I'd most like to join. What languages I know: C, C++, Lua, Python, and fairly familiar with Perl (though I wouldn't say I "know" it). In particular, I have very little experience with x86 assembly besides hacking stuff together for performance tweaks, though that will be partially rectified soon. What I'm looking for: A community that provides plenty of opportunities for developers to work on various aspects of the distribution. To be honest I'm most interested in reading and working on the kernel source (in which case the distro doesn't matter), but it's pretty daunting and I figure getting into the Linux community and working with experienced Linux developers might give me a better idea of how to jump into the guts(let me know if this is bogus, or if you have any advice regarding that). So... Which distro has the "best" developer community in terms of organization, people who are fun to work with, and opportunities to contribute? I've read various "Contributing to XXX" pages and mailing lists for distros like Ubuntu, OpenSuse, Fedora, etc. but I'd rather get a more personal testament from an actual developer.

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