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  • TechEd 2010 Important Events

    If youll be attending TechEd in New Orleans in a couple of weeks, make sure the following are all on your calendar:   Party with Palermo TechEd 2010 Edition Sunday 6 June 2010 7:30-930pm Central Time RSVP and see who else is coming here.  The party takes place from 730pm to 930pm Central (Local) Time,  and includes a full meal, free swag, and prizes.  The event is being held at Jimmy Buffetts Margaritaville located at 1104 Decatur Street.   Developer Practices Session: DPR304 FAIL: Anti-Patterns and Worst Practices Monday 7 June 2010 4:30pm-545pm Central Time Room 276 Come to my session and hear about what NOT to do on your software project.  Hear my own and others war stories and lessons learned.  Youll laugh, youll cry, youll realize youre a much better developer than a lot of folks out there.  Heres the official description: Everybody likes to talk about best practices, tips, and tricks, but often it is by analyzing failures that we learn from our own and others' mistakes. In this session, Steve describes various anti-patterns and worst practices in software development that he has encountered in his own experience or learned about from other experts in the field, along with advice on recognizing and avoiding them. View DPR304 in TechEd Session Catalog >> Exhibition Hall Reception Monday 7 June 2010 545pm-9pm Immediately following my session, come meet the shows exhibitors, win prizes, and enjoy plenty of food and drink.  Always a good time.   Party: Geekfest Tuesday 8 June 8pm-11pm Central Time, Pat OBriens Lets face it, going to a technical conference is good for your career but its not a whole lot of fun. You need an outlet. You need to have fun. Cheap beer and lousy pizza (with a New Orleans twist) We are bringing back GeekFest! Join us at Pat OBriens for a night of gumbo, beer and hurricanes. There are limited invitations available, so what are you waiting for? If you are attending the TechEd 2010 conference and you are a developer, you are invited. To register pick up your "duck" ticket (and wristband) in the TechEd Technical Learning Center (TLC) at the Developer Tools & Languages (DEV) information desk. You must have wristband to get in. Tuesday, June 8th from 8pm 11pm Pat OBriens New Orleans 624 Bourbon Street New Orleans, LA 70130 Closing Party at Mardi Gras World Thursday 10 June 730pm-10pm Central Time Join us for the Closing Party and enjoy great food, beverages, and the excitement of New Orleans at Mardi Gras World. The colors, the lights, the music, the joie de vivreits all here.  Learn more >> Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Is browser and bot whitelisting a practical approach?

    - by Sn3akyP3t3
    With blacklisting it takes plenty of time to monitor events to uncover undesirable behavior and then taking corrective action. I would like to avoid that daily drudgery if possible. I'm thinking whitelisting would be the answer, but I'm unsure if that is a wise approach due to the nature of deny all, allow only a few. Eventually someone out there will be blocked unintentionally is my fear. Even so, whitelisting would also block plenty of undesired traffic to pay per use items such as the Google Custom Search API as well as preserve bandwidth and my sanity. I'm not running Apache, but the idea would be the same I'm assuming. I would essentially be depending on the User Agent identifier to determine who is allowed to visit. I've tried to take into account for accessibility because some web browsers are more geared for those with disabilities although I'm not aware of any specific ones at the moment. The need to not depend on whitelisting alone to keep the site away from harm is fully understood. Other means to protect the site still need to be in place. I intend to have a honeypot, checkbox CAPTCHA, use of OWASP ESAPI, and blacklisting previous known bad IP addresses.

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  • How to handle new domain names?

    - by michael
    I have a new product which I'll call a pen ink reloader. I have a website using my products name, for example, www.inkywink.com which I want to have accessed by searches for keywords such as "pen ink", "pen out of ink" "ink for pens" etc. , since nobody knows that a pen ink reloader exists. I see that its quite difficult to get on front page for these keywords since they have lots of competition. However I notice that the exact phrases I want to rank highly for are available as domains. I purchase "www.penink.com" and "penoutofink.com" which for arguments sake are highly searched and the perfect keywords to get eyes on my money site www.inkywink.com . Two questions: 1. What is my best option to leverage those names so that they appear near top of searches so that I can get traffic to my money site? Do I just have them redirect 301 to inkywink.com or should I create small original content on each with links to my main site? 2. If I just have them redirected to inkywink.com, am I able to use keywords in metatag and headers for each site separately or do they all automatically obtain the same headers and tags as the site to which theyre redirected ? Thanks to anyone who can help as I'm a real newbie to all this.

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  • Could crosslinking using very general anchor texts be a reason for a drop in rankings?

    - by webmasters
    I have crosslinked 20 sites and I thought I have been penalized for this, asked this question and some experienced members told me maybe that crosslinking may not necessarily be the reason. The sites are on same host, different C class IP and every site in linked to each other. Each site targets long tail kewords. Site 1 - BMW Used Cars - and my area Site 2 - WW Used Cars - and my area And so on... When I crosslinked them (in the sidebar), I did it for the users; instead of repeating the terms used cars and my location over and over (since my users are targeted) I just crosslinked them using the brand: BMW, WW. Targeting locally, my niches are not overly competitive, so I did not need to many external links to rank on various positions on the 1st page. I'm thinking that when I chose to link using only the brand, google might have thought I wanted to actually rank for BBW and WW, hence the drop in my targeted local traffic. Could this be? I now have no-followed the links and I am noticing a slight recovery, but if it's not a interlinking penalty it would be a shame not to benefit from my links.

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  • Hosting and domain registrations for multiple clients

    - by letseatfood
    I am finally getting regular work desiging, developing, and deploying websites for small businesses and individuals. So far the websites utilize single-user content management systems, so the websites create, as far as I know, minimal load on the shared servers. I have always required that each of my clients purchase annual shared hosting at Dreamhost. For domain registration, I ask that they register with Dreamhost, but some already have a registered domain elsewhere and this is fine with me. I do this so the billing issues are the client's responsibility, not mine. My question is: Since I can register unlimited domains and connect them to my one shared hosting account at Dreamhost, should I not be requiring clients to individually pay for shared hosting and a domain? Should I actually be paying for one hosting account and then hosting all of my client's websites on that account? As I said before, I currently have each client buy their own hosting, because I feel that, for example, if there is high traffic to their site, there would be less a chance of the site going down than if their site was hosted with many others on one account. I am famous for being long-winded, please let me know if I can clarify at all. Thanks!

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  • Which is the best image hosting site for hosting images for website? [closed]

    - by rahul dagli
    I currently have a website and blog and using a limited web hosting plan. When I upload images on my hosting server it consumes a lot of bandwidth and space. So I was thinking of hosting images on some-other image hosting site and direct linking it to my site. I found out few sites like imageshack, photobucket, tinypic, imgur. However, I see all have certain restrictions. The features i am looking for are as follows: 1. At least 10gb space 2. At least 500gb bandwidth (bec I hav very high traffic) 3. Very high speed even during heavy load like 1000 visitors accessing every hour. 4. Ultra reliable servers (99.9% uptime) 5. Privacy control 6. Must not ever delete image if inactive 7. Create and manage albums 8. Company that will last long in business atleast for next 10 years. 9. Free of cost 10. Hotlinking/ Directlinking image.

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  • Is it possible to have multiple subdomains point to the same Blogger blog?

    - by cclark
    For our application we want to have a status page which is hosted outside of the rest of our infrastructure so in case there are issues in our data center we can post updates for our users and our users will be able to access them. We registered a blog on Blogger and set it up with xyzstatus.blogspot.com and status.xyz.com. Everything seems to work fine. We need to perform some maintenance at our datacenter which will sever all connectivity so we're unable to have a redirect using nginx or apache. We'd like to do this with a short TTL CNAME DNS entry. Ideally www.xyz.com and app.xyz.com could be CNAMEd to status.xyz.com. When I setup the CNAME and go to that URL I get a Google broken robot 404 page. I figure I must need to let Google know it should associate traffic to www.xyz.com and app.xyz.com to the blog served up by status.xyz.com. But I can't see anywhere to do this in Blogger. Does anyone know if this is possible?

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  • Can I use a 302 redirect to serve up static content from an URL with escaped_fragment?

    - by Starfs
    We would like to serve up SEO-friendly Ajax-driven content. We are following this documentation. Has anyone ever tried to write a 302 redirect into the .htaccess file, that takes the ?_escaped_fragment= string and send that to a static page?, for example /snapshot/yourfilename/. How will Google react to this? I've gone through the documentation and it's not very clear. The below quote is from Google's documentation this is what I find. I'm not sure if they are saying that you can redirect the _escaped_fragment_ URL to a different static page, or if this is to redirect the hashtag URL to static content? Thoughts? From Google's site: Question: Can I use redirects to point the crawler at my static content? Redirects are okay to use, as long as they eventually get you to a page that's equivalent to what the user would see on the #! version of the page. This may be more convenient for some webmasters than serving up the content directly. If you choose this approach, please keep the following in mind: Compared to serving the content directly, using redirects will result in extra traffic because the crawler has to follow redirects to get the content. This will result in a somewhat higher number of fetches/second in crawl activity. Note that if you use a permanent (301) redirect, the url shown in our search results will typically be the target of the redirect, whereas if a temporary (302) redirect is used, we'll typically show the #! url in search results. Depending on how your site is set up, showing #! may produce a better user experience, because the user will be taken straight into the AJAX experience from the Google search results page. Clicking on a static page will take them to the static content, and they may experience avoidable extra page load time if the site later wants to switch them to the AJAX experience.

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  • What are some good tips for a developer trying to design a scalable MySQL database?

    - by CFL_Jeff
    As the question states, I am a developer, not a DBA. I have experience with designing good ER schemas and am fairly knowledgeable about normalization and good schema design. I have also worked with data warehouses that use dimensional modeling with fact tables and dim tables. However, all of the database-driven applications I've developed at previous jobs have been internal applications on the company's intranet, never receiving "real-world traffic". Furthermore, at previous jobs, I have always had a DBA or someone who knew much more than me about these things. At this new job I just started, I've been asked to develop a public-facing application with a MySQL backend and the data stored by this application is expected to grow very rapidly. Oh, and we don't have a DBA. Well, I guess I am the DBA. ;) As far as designing a database to be scalable, I don't even know where to start. Does anyone have any good tips or know of any good educational materials for a developer who has been sort of shoved into a DBA/database designer role and has been tasked with designing a scalable database to support an application like this? Have any other developers been through this sort of thing? What did you do to quickly become good at this role? I've found some good slides on the subject here but it's hard to glean details from slides. Wish I could've attended that guy's talk. I also found a good blog entry called 5 Ways to Boost MySQL Scalability which had some good information, though some of it was over my head. tl;dr I just want to make sure the database doesn't have to be completely redesigned when it scales up, and I'm looking for tips to get it right the first time. The answer I'm looking for is a "list of things every developer should know about making a scalable MySQL database so your application doesn't perform like crap when the data gets huge".

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  • With Google Analytics, is it possible to check a specific page in Multi-Channel conversion attribution?

    - by Emmett R.
    I'm somewhat new to Google Analytics, and I'm trying to track all conversions that are assisted by a particular landing page, because I don't expect an instant purchase. I have e-commerce tracking set up. Due to the constraints of the associated ad campaign, I can't include the source/medium code in the url when people go to the landing page, and all of my traffic to the landing page is likely to be direct, so I'm not sure how to tell Multi-Channel marketing that it's a significant page. I know how to add events to a page, but I'm still figuring out what they can and cannot do. Would creating a redirect from the landing url to an identical url+source/medium code work? Any advice on how to accomplish this would be greatly appreciated. Tracking the final sale conversion is not the issue. Ecommerce reporting is functioning just fine on the site. I just want to report the landing page as an assist, whenever it shows up in the funnel, and I need to be able to do that across multiple visits.

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  • Request Removal of naked domain from Google Index

    - by Pedr
    I have a site which was temporarily available at both example.com and www.example.com. All traffic to example.com is now redirected to www.example.com, however during the brief period that the site was available at the naked domain, Google indexed it. So Google now has two versions of every page indexed: www.example.com www.example.com/about_us www.example.com/products/something ... and example.com example.com/about_us example.com/products/something ... For obvious reasons, this is a bad situation, so how can I best resolve it? Should I request removal of these pages from the index? There is still content at these URLs, but they now redirect to the www subdomain equivalent. The site has many hundreds of pages, but the only way I can see to request removal is via the Remove outdated content screen in Webmaster Tools, one URL at a time. How can I request removal of an entire domain (ie. the naked domain) without it effecting the true site located at the www subdomain? Is this the correct strategy given that all the naked domains now redirect to their www equivalent?

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  • Google Analytics: Do unique events report as unique visits when triggered on pages other than your own domain?

    - by Jesse Gardner
    We just recently attached a SWF to our Brightcove video player to report various events back to Google Analytics. We're also tracking page views with a standard GA snippet on the page where the player is embedded. As I understand it, because a unique has already been recorded for the page, any event being triggered by the player is getting associated with that unique. However, we allow people to embed the video player on other websites. All of the event data started pouring into the Events section as expected, but we noticed a dramatic uptick in unique visitors on the site (nearly double) while the pageview count stayed relatively unchanged. Disabling event tracking brought the traffic back down to average levels. I should also add that in the Pages section of Event tracking we're seeing URLs for other sites where the player has been embedded; but this data isn't showing up in the Content section. It seems counterintuitive, but does GA count an event fired as a unique visit even if it's triggered from some place other than your website? Is so, there any way to trigger an event in the events section without it reporting to the unique visitor count?

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  • Is it better to have multiple domains for cities or one single TLD?

    - by Brett
    I make websites for small businesses, and for some reason business owners love to have several domains with the same website but the TLD containing the city name. For example: 1. smallbizname.com 2. clevelandsmallbizname.com 3. columbussmallbizname.com 4. cincinnatismallbizname.com ... and so on. I've seen questions about localization per country aspects, but this is a much smaller scale, so I don't think the same rules apply. The problem I have is the companies never want to write separate content per domain, just have the same website hosted several times at each domain. I feel this probably hurts SEO for two reasons: 1. Traffic gets scattered throughout domains, could be boosting just one domain. 2. Duplicate content penalty because the content is identical. My question boils down to this... Should I redirect all the city domains to the main business name domain, or does having these separate sites help to rank better per city? And if they are redirected, how does google rank the redirects? Thanks for any input on this issue!!

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  • Why RenderTarget2D overwrites other objects when trying to put some text in a model?

    - by cad
    I am trying to draw an object composited by two cubes (A & B) (one on top of the other, but for now I have them a little bit more open). I am able to do it and this is the result. (Cube A is the blue and Cube B is the one with brown text that comes from a png texture) But I want to have any text as parameter in the cube B. I have tried what @alecnash suggested in his question, but for some reason when I try to draw cube B, cube A dissapears and everything turns purple. This is my draw code: public void Draw(GraphicsDevice graphicsDevice, SpriteBatch spriteBatch, Matrix viewMatrix, Matrix projectionMatrix) { graphicsDevice.BlendState = BlendState.Opaque; graphicsDevice.DepthStencilState = DepthStencilState.Default; graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise; graphicsDevice.SamplerStates[0] = SamplerState.LinearClamp; // CUBE A basicEffect.View = viewMatrix; basicEffect.Projection = projectionMatrix; basicEffect.World = Matrix.CreateTranslation(ModelPosition); basicEffect.VertexColorEnabled = true; foreach (EffectPass pass in basicEffect.CurrentTechnique.Passes) { pass.Apply(); drawCUBE_TOP(graphicsDevice); drawCUBE_Floor(graphicsDevice); DrawFullSquareStripesFront(graphicsDevice, _numStrips, Color.Red, Color.Blue, _levelPercentage); DrawFullSquareStripesLeft(graphicsDevice, _numStrips, Color.Red, Color.Blue, _levelPercentage); DrawFullSquareStripesRight(graphicsDevice, _numStrips, Color.Red, Color.Blue, _levelPercentage); DrawFullSquareStripesBack(graphicsDevice, _numStrips, Color.Red, Color.Blue, _levelPercentage); } // CUBE B // Set the World matrix which defines the position of the cube texturedCubeEffect.World = Matrix.CreateTranslation(ModelPosition); // Set the View matrix which defines the camera and what it's looking at texturedCubeEffect.View = viewMatrix; // Set the Projection matrix which defines how we see the scene (Field of view) texturedCubeEffect.Projection = projectionMatrix; // Enable textures on the Cube Effect. this is necessary to texture the model texturedCubeEffect.TextureEnabled = true; Texture2D a = SpriteFontTextToTexture(graphicsDevice, spriteBatch, arialFont, "TEST ", Color.Black, Color.GhostWhite); texturedCubeEffect.Texture = a; //texturedCubeEffect.Texture = cubeTexture; // Enable some pretty lights texturedCubeEffect.EnableDefaultLighting(); // apply the effect and render the cube foreach (EffectPass pass in texturedCubeEffect.CurrentTechnique.Passes) { pass.Apply(); cubeToDraw.RenderToDevice(graphicsDevice); } } private Texture2D SpriteFontTextToTexture(GraphicsDevice graphicsDevice, SpriteBatch spriteBatch, SpriteFont font, string text, Color backgroundColor, Color textColor) { Vector2 Size = font.MeasureString(text); RenderTarget2D renderTarget = new RenderTarget2D(graphicsDevice, (int)Size.X, (int)Size.Y); graphicsDevice.SetRenderTarget(renderTarget); graphicsDevice.Clear(Color.Transparent); spriteBatch.Begin(); //have to redo the ColorTexture //spriteBatch.Draw(ColorTexture.Create(graphicsDevice, 1024, 1024, backgroundColor), Vector2.Zero, Color.White); spriteBatch.DrawString(font, text, Vector2.Zero, textColor); spriteBatch.End(); graphicsDevice.SetRenderTarget(null); return renderTarget; } The way I generate texture with dynamic text is: Texture2D a = SpriteFontTextToTexture(graphicsDevice, spriteBatch, arialFont, "TEST ", Color.Black, Color.GhostWhite); After commenting several parts to see what caused the problem, it seems to be located in this line graphicsDevice.SetRenderTarget(renderTarget);

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  • Choosing the correct network protocol for my type of game (its Wc3 Warlock style)

    - by Moritz
    I need to code a little game for a school project. The type of the game is like the Warcraft 3 map "Warlock", if anyone doesnt know it, here is a short description: up to ten players spawn into an arena filled with lava, the goal of each player is to push the other players into the lava with spells (basically variations of missiles, aoe nukes, moba spells etc) http://www.youtube.com/watch?v=c3PoO-gcJik&feature=related we need to provide multiplayer-support over the internet, for that reason I am looking for the best network protocol for this type of game (udp, tcp, lock step, client-server...) what the requirements are: - same/stable simulation on all clients - up to ten players - up to ~100 missiles on the field - very low latency since its reaction based (i dont know the method wc3 used, but it was playable with the old servers) what would be nice (if even possible, since the traffic might be too big): - support for soft bodies over the network (with bullet physics), but this is no real requirement I read several articles about the lock step method used for RTS games, this seems to be great, but does it fit for real-time action games too (ping-related)? If anyone has run into the same problems/questions like me, I would be very happy about any help

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  • Cannot submit change of address to subdomain in Google Webmaster Tools?

    - by RCNeil
    I am pointing several domains to one URL, a URL which happens to include a subdomain. ALL of the domains are using 301 redirects to point to this new address. One of the older domains (which used to be a site) is a 'property' in Webmaster Tools, as is the new site (the one with the subdomain.) When registering a 'Change of Address' for the old site with WebmasterTools, it suggests the following method - Set up your content on your new domain. (done) Redirect content from your old site using 301 redirects. (done) Add and verify your new site to Webmaster Tools. (done) Then, directly below that, to proceed, it says Tell us the URL of your new domain: Your account doesn't contain any sites we can use for a change of address. Add and verify the new site, then try again. I have already submitted and verified the new site. The only reason I can fathom I am getting this error is because the new site includes a subdomain. Although I don't foresee getting punished for this, as I am correctly 301 redirecting traffic anyway, I'm curious as to why the Change of Address submission isn't working appropriately for me. Has anyone else had experience with this?

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  • JSR 308 Moves Forward

    - by abuckley
    I am pleased to announce a number of recent milestones for JSR 308, Annotations on Java Types: Adoption of JCP 2.8 Thanks to the agreement of the Expert Group, JSR 308 operates under JCP 2.8 from September 2012. There is a publicly archived mailing list for EG members, and a companion list for anyone who wishes to follow EG traffic by email. There is also a "suggestion box" mailing list where anyone can send feedback to the E.G. directly. Feedback will be discussed on the main EG list. Co-spec lead Prof. Michael Ernst maintains an issue tracker and a document archive. Early-Access Builds of the Reference Implementation Oracle has published binaries for all platforms of JDK 8 with support for type annotations. Builds are generated from OpenJDK's type-annotations/type-annotations forest (notably the langtools repo). The forest is owned by the Type Annotations project. Integration with Enhanced Metadata On the enhanced metadata mailing list, Oracle has proposed support for repeating annotations in the Java language in Java SE 8. For completeness, it must be possible to repeat annotations on types, not only on declarations. The implementation of repeating annotations on declarations is already in the type-annotations/type-annotations forest (and hence in the early-access builds above) and work is underway to extend it to types.

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  • Is it reasonable to null guard every single dereferenced pointer?

    - by evadeflow
    At a new job, I've been getting flagged in code reviews for code like this: PowerManager::PowerManager(IMsgSender* msgSender) : msgSender_(msgSender) { } void PowerManager::SignalShutdown() { msgSender_->sendMsg("shutdown()"); } I'm told that last method should read: void PowerManager::SignalShutdown() { if (msgSender_) { msgSender_->sendMsg("shutdown()"); } } i.e., I must put a NULL guard around the msgSender_ variable, even though it is a private data member. It's difficult for me to restrain myself from using expletives to describe how I feel about this piece of 'wisdom'. When I ask for an explanation, I get a litany of horror stories about how some junior programmer, some-year, got confused about how a class was supposed to work and accidentally deleted a member he shouldn't have (and set it to NULL afterwards, apparently), and things blew up in the field right after a product release, and we've "learned the hard way, trust us" that it's better to just NULL check everything. To me, this feels like cargo cult programming, plain and simple. A few well-meaning colleagues are earnestly trying to help me 'get it' and see how this will help me write more robust code, but... I can't help feeling like they're the ones who don't get it. Is it reasonable for a coding standard to require that every single pointer dereferenced in a function be checked for NULL first—even private data members? (Note: To give some context, we make a consumer electronics device, not an air traffic control system or some other 'failure-equals-people-die' product.) EDIT: In the above example, the msgSender_ collaborator isn't optional. If it's ever NULL, it indicates a bug. The only reason it is passed into the constructor is so PowerManager can be tested with a mock IMsgSender subclass.

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  • It Ain't Over 'Til It's Over

    - by Oracle OpenWorld Blog Team
    Oracle OpenWorld 2012 is behind us. Well, for San Francisco, anyhow. The team is already working on the Latin America event which takes place in December in Sao Paulo, and an OpenWorld in Asia for 2013 as well. And of course they're already working on the next San Francisco OpenWorld for 2013. So what happens after the conference is over? People pack up demo and network gear and ship it out to wherever it's going next; take down and recycle signage; strike the keynote set, the exhibition and demo halls, the street tents, and anything else that was constructed just for the conference. There's a lot of post-conference analyis going on too. Oracle and partner marketing teams are looking at and following up on the leads they got from booth, demo, and lounge traffic. The events team is evaluating the session and conference surveys you filled out if you attended -- looking to identify the best speakers, what worked and didn't work, how you liked the venues, the food, the entertainment, the presentations. From all of that information will come recommendations for next year on what to keep doing, what to do better, and what not to do at all. The goal for each year's conference is to be better than last year's. If you attended and haven't filled out the surveys yet, you have until October 19 for them to be counted, and for you to be entered into a daily sweepstakes. Click here for more information. Posts to this blog will slow down for a while, but we'll post news about Oracle OpenWorld in San Francisco and around the world when we have it. Any suggestions about future blog topics are welcome. Oh - I forgot to mention that you can sign up to be notified when registration for Oracle OpenWorld 2013 goes live. If you register at that time you'll get the best discount available on attending next year. So sign up, and stay tuned.

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  • How to build an API on top of an existing Rails app with NodeJs and what architecture to use?

    - by javiayala
    The explanation I was recently hired by a company that has an old RoR 2.3 application with more than 100k users, a strong SEO strategy with more than 170k indexed urls, native android and ios applications and other custom-made mobile and web applications that rely on a not so good API from the same RoR app. They recently merged with a company from another country as an strategy to grow the business and the profit. They have almost the same stats, a similar strategy and mobile apps. We have just decided that we need to merge the data from both companies and to start a new app from scratch since the RoR app is to old and heavily patched and the app from the other company was built with a custom PHP framework without any documentation. The only good news is that both databases are in MySQL and have a similar structure. The challenge I need to build a new version that: can handle a lot of traffic, preserves the SEO strategies of both companies, serve 2 different domains, and have a strong API that can support legacy mobile apps from both companies and be ready for a new set of native apps. I want to use RoR 3.2 for the main web apps and NodeJs with a Restful API. I know that I need to be very careful with the mobile apps and handle multiple versions of the API. I also think that I need to create a service that can handle a lot IO request since the apps is heavily used to create orders for restaurants at a certain time of the day. The questions With all this in mind: What type of architecture do you recommend me to follow? What gems or node packages do you think will work the best? How do I build a new rails app and keep using the same database structure? Should I use NodeJS to build an API or just build a new service with Ruby? I know that I'm asking to much from you guys, but please help me by answering any topic that you can or by pointing me on the right direction. All your comments and feedback will be extremely appreciated! Thanks!

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  • Appropriate design / technologies to handle dynamic string formatting?

    - by Mark W
    recently I was tasked with implementing a way of adding support for versioning of hardware packet specifications to one of our libraries. First a bit of information about the project. We have a hardware library which has classes for each of the various commands we support sending to our hardware. These hardware modules are essentially just lights with a few buttons, and a 2 or 4 digit display. The packets typically follow the format {SOH}AADD{ETX}, where AA is our sentinel action code, and DD is the device ID. These packet specs are different from one command to the next obviously, and the different firmware versions we have support different specifications. For example, on version 1 an action code of 14 may have a spec of {SOH}AADDTEXT{ETX} which would be AA = 14 literal, DD = device ID, TEXT = literal text to display on the device. Then we come out with a revision with adds an extended byte(s) onto the end of the packet like this {SOH}AADDTEXTE{ETX}. Assume the TEXT field is fixed width for this example. We have now added a new field onto the end which could be used to say specify the color or flash rate of the text/buttons. Currently this java library only supports one version of the commands, the latest. In our hardware library we would have a class for this command, say a DisplayTextArgs.java. That class would have fields for the device ID, the text, and the extended byte. The command class would expose a method which generates the string ("{SOH}AADDTEXTE{ETX}") using the value from the class. In practice we would create the Args class as needed, populate the fields, call the method to get our packet string, then ship that down across the CAN. Some of our other commands specification can vary for the same command, on the same version, depending on some runtime state. For example, another command for version 1 may be {SOH}AA{ETX}, where this action code clears all of the modules behind a specific controller device of their text. We may overload this packet to have option fields with multiple meanings like {SOH}AAOC{ETX} where OC is literal text, which tells the controller to only clear text on a specific module type, and to leave the others alone, or the spec could also have an option format of {SOH}AADD{ETX} to clear the text off a a specific device. Currently, in the method which generates the packet string, we would evaluate fields on the args class to determine which spec we will be using when formatting the packet. For this example, it would be along the lines of: if m_DeviceID != null then use {SOH}AADD{ETX} else if m_ClearOCs == true then use {SOH}AAOC{EXT} else use {SOH}AA{ETX} I had considered using XML, or a database to store String.format format strings, which were linked to firmware version numbers in some table. We would load them up at startup, and pass in the version number of the hardwares firmware we are currently using (I can query the devices for their firmware version, but the version is not included in all packets as part of the spec). This breaks down pretty quickly because of the dynamic nature of how we select which version of the command to use. I then considered using a rule engine to possibly build out expressions which could be interpreted at runtume, to evaluate the args class's state, and from that select the appropriate format string to use, but my brief look at rule engines for java scared me away with its complexity. While it seems like it might be a viable solution, it seems overly complex. So this is why I am here. I wouldn't say design is my strongest skill, and im having trouble figuring out the best way to approach this problem. I probably wont be able to radically change the args classes, but if the trade off was good enough, I may be able to convince my boss that the change is appropriate. What I would like from the community is some feedback on some best practices / design methodologies / API or other resources which I could use to accomplish: Logic to determine which set of commands to use for a given firmware version Of those command, which version of each command to use (based on the args classes state) Keep the rules logic decoupled from the application so as to avoid needing releases for every firmware version Be simple enough so I don't need weeks of study and trial and error to implement effectively.

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  • There's Not an App for That (Yet)

    - by Mark Hesse
    With an earlier-than-normal departure this morning to avoid the stalemate known as traffic congestion, I suddenly realized what I had failed to grab on my way out the door...  my company ID badge.  Unfortunately, at the time of my epiphany, I was far enough into commuter no-man's land where turning back would completely negate my early departure and increase my overall drive time exponentially.  Not being one to retrace my steps, I decided to press on. Upon arrival at the office and with an hour to go before a security guard would be on duty, I started thinking about the number of times I had forgotten my ID vs. the number of times I had forgotten my phone.  While rare on both accounts, my ID was most likely the missing artifact. I then wondered why there isn't an app for my smartphone that allows me to verify my credentials with my employer and then, provided with a secure token for the day, have the ability to access my building's card entry system.  On many levels, this seems much more secure than an ID card which can be lost, stolen or even forged and then used simply by tailgating into and around buildings at facilities where card scanning can generally be avoided.   As it turns out, another building on the campus has 24 x 7 guard coverage, so I was able to gain access in a relatively short time and secure a temporary ID badge.  Once inside and online, a quick internet search on the subject of smartphone badge access shows that efforts are underway to do exactly what I was thinking needed to be done. Having not spent any time studying about the technology, I discovered that it relies on Near Field Communications (NFC) enabled smartphones (of which, mine does not provide).  The only other option would require modifications to the security infrastructure to support alternative authentication technologies, such as barcode readers, which would be extremely costly to implement. For now, my best option is to put my corporate ID under my car keys... 

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  • Mirroring of Apps across servers

    - by user1038814
    We wish to host multiple apps across multiple servers. What we are looking for (ideally) is an existing solution which will work. For example, normally to do it we'd follow a route (for failover) like: App is installed on one server along with mysql database App is also installed on a second server. Rsync is used to mirror the files over to the second server and ensure consistency MySQL is installed with a Master-Slave setup. We use a service such as DNS Made Easy which has a DNS failover. If one server goes down it automatically routes traffic to the backup server We have done the above a few times and generally its fine. The issue I have here is that the above is for one app. What I would like to look at is how we can manage for multiple apps and if there is a layer (such as VMWare) that has complete mirroring built in at the OS level? For example how do web hosts currently do it when they ensure that more than one machine is running a bunch of hosted websites. If you were running hosting and you had 200 clients on a server you would want the same clients across 2 or more servers and want everything mirrored. Any advice would be much appreciated.

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  • Random generation of interesting puzzle levels?

    - by monsterfarm
    I'm making a Sokoban-like game i.e. there's a grid that has some crates on it you can push and you have to get the crates on crosses to win the level (although I'm going to add some extra elements to it). Are there any general algorithms or reading material I can look at for how I could go about generating interesting (as in, not trivial to solve) levels for this style of game? I'm aware that random level generators exist for Sokoban but I'm having trouble finding the algorithm descriptions. I'm interested in making a game where the machine can generate lots of levels for me, sorted by difficulty. I'm even willing to constrain the rules of the game to make the level generation easier (e.g. I'll probably limit the grid size to about 7x7). I suspect there are some general ways to do level generation here as I've seen e.g. Traffic Jam-like games (where you have to move blocks around the free some block) with 1000s of levels where each one has a unique solution. One idea I had was to generate a random map in its final state (i.e. where all crates are on top of their crosses) and then the computer would pull (instead of push) these crates around to create a level. The nice property here is that we know the level is solvable. However, I'd need some heuristics to ensure the level was interesting.

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  • Customer Highlight: NTT DOCOMO

    - by jeckels
    NTT DOCOMO is the largest mobile operator in Japan, and serves over 13 million smartphone customers. Due to their growing data processing and scalability needs, they turned to Oracle's Cloud Application Foundation products for an integral soultion. At Oracle OpenWorld 2012, we first showcased NTT DOCOMO as a customer who was utilizing Oracle Coherence to process mobile data at a rate of 700,000 events per second (and then using Hadoop for distributed processing of big data). Overall, this Led to a 50% cost reduction due to the ultra-high velocity traffic processing of their customers' events. Recently, on October 7th, 2013, Oracle and NTT DOCOMO were proud to again announce a partnership around another key component of Oracle CAF: WebLogic Server. WebLogic was recently deployed as the application platform of choice to run DOCOMO's mission-critical data system ALADIN, which connects nationwide shops and information centers. ALADIN, which also utilizes Oracle Database and Oracle Tuxedo, is based on Java Platform, Enterprise Edition (Java EE), which has allowed the company to operate smoothly while minimizing additional development and modification associated with the migration of application server products. We look forward to continuing to partner with NTT DOCOMO, and are proud that Oracle Cloud Application Foundation products are providing the mission-critical solutions - at scale - that DOCOMO requires. Want to learn more about how CAF products are working in the real world? Join us for a FREE Virtual Developer Day on November 5th from 9am-1pm Pacific Time!REGISTER NOW

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