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• Great Java EE Concurrency Write-up!

  - by reza_rahman

  As you are aware JSR-236, Concurrency Utilities for the Java EE platform, is now a candidate for addition into Java EE 7. While it is a critical enabling API it is not necessarily obvious why it is so important. This is especially true with existing features like EJB 3 @Asynchronous, Servlet 3 async and JAX-RS 2 async. On his blog DZone MVB Sander Mak does an excellent job of explaining the motivation and importance of JSR-236. Perhaps even more importantly, he discusses potential issues with the API such alignment with CDI and Java SE Fork/Join. Read the excellent write-up here!

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• Rendering scaled-down card images

  - by user1065145

  I have high-quality SVG card images, but they drastically lose their quality when I downsize them. I have tried two ways of rendering cards (using Inkscape and Imagemagics): 1) Render SVG to high-res PNG and resize it then: inkscape -D --export-png=QS1024.png --export-width=1024 QS.svg convert QS1024.png -filter Lanczos -sampling-factor 1x1 -resize 71x QS71.png 2) Render SVG to image of proper size at once: inkscape -D --export-png=QS71.png --export-width=71 QS.svg Both approaches generate blurry card images, which looks even worse than old Windows cards. What are the best way to generate smaller card images from SVG sources and not to loose their quality a lot? UPDATE: I am using Inkscape to render SVG - PNG and ImageMagick then to downsize PNG. I've tried using convert -resize with couple of filters (Lanczos/Mitchell/etc), but result was pretty much the same. Original: 71x raster:

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• How to disable OSD notifications for specific email addresses?

  - by Zuul

  I receive several logs per day via email, either from testing operations, server status or backup resumes. Can I some how disable the notification balloon either by a specific email address, the email subject or any other possible filter, as to not be constantly notified about the success operations? I've looked within the Notify OSD Configuration, but couldn't find any option to this end. Since the email comes with different information when errors occur, I already have filters within Thunderbird as to move error logs to a folder that I keep tabs on... If relevant, I'm using Ubuntu 12.04 fully updated, and Thunderbird 15.0.1.

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• java framework for a web wizard

  - by snippl

  I'd like to create a web wizard or a wizard on/within a website. I know there are several java frameworks for wizards but there is none for the web in particular. If I search for a framework, I always get wizards to create a website, applet, servlet and what not. But never how to create such a wizard itself. So the question(s) is: What framework should I use to create a web wizard? And what frameworks are there? The wizard will be the visualisation for a BPEL Process deployment on a apache ode. I thought a webapp would be an easy way because the apache is running anyway. I'm not bound to that, perhaps someone has a better idea.

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• Updates to the Demantra Partial Schema Exporter Tool, Patch 13930627, are Available.

  - by user702295

  Hello!  Updates to the Demantra Partial Schema Exporter Tool, Patch 13930627, are Available. This is an updated re-release of the generic Partial Schema Exporter Tool.  The generic patch is for 7.3.1.x and 12.2.x. TABLE_REORG was introduced in 7.3.1.3 12.2.0.  Therefore for 7.3.1.x the schema must be at 7.3.1.3 or above. This is build 3 of the patch. It contains fixes for the following bugs - BUG 17495971 - DEMANTRA 12.2 - CUMULATIVE HISTORY NOT CORRECT   It now only uses DATA_PUMP COMPRESSION only on Enterprise Edition for 11g and and up. - Bug 17452153 - 1OFF:16086475:TRYING TO FILTER DROP DOWN IN A METHOD CALL USING MORE THAN 1 ATTR   It now builds GL level filters with and without the GL id column where applicable. These bugs are also fixed in 7.3.1.6 and 12.2.3.

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• Building a Map based WebApp fast?

  - by NLemay

  I want to build a WebApp which is basically a map with points of interest, filters, and a list of those points. Something really similar to AirBnB, or any other map based app. Of course, I could just take Google Maps API and build what's around. But I guess a lot of people already did that, and may be I could use their work to make mine faster. Here's what I need : Adding multiples POI A list of POI that are showed on the map A way to filter POI Most have a behavior to handle a lot of POI Can works on mobile and tablet I already know one template that can do nearly all of this, it is call Bootleaf. But I would like to know if you know others that might work better.

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• How best to take a users signature online? (UK law orientated) [closed]

  - by Ben Griffiths

  Not sure if this is the best place to ask, but I can't seem to find any of the other SE sites that would fit better (unless there's a law one?) I'm building an application that will replace an existing paper based form, and this form would normally be signed by the person filling it in. Looking around, it's hard to find a good definitive resource to explain what I can and cannot accept as far as a signature goes. It looks like some UK government online forms accept just your name typed into a box, but I've also heard you should back up with an email - so that process would be type name into a box along with providing an email address, send out an email, then make them click a link within the email to finally complete the verification. Involving email seems very long winded and leaves the system open to spam filters blocking emails, forgotten emails that just sit in inbox's etc. So, does anyone have any knowledge in this department? Personally, I'd love to just get them to type their name into a box and be done with it!

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• What is the general definition of something that can be included or excluded?

  - by gutch

  When an application presents a user with a list of items, it's pretty common that it permits the user to filter the items. Often a 'filter' feature is implemented as a set of include or exclude rules. For example: include all emails from [email protected], and exclude those emails without attachments I've seen this include/exclude pattern often; for example Maven and Google Analytics filter things this way. But now that I'm implementing something like this myself, I don't know what to call something that could be either included or excluded. In specific terms: If I have a database table of filter rules, each of which either includes or excludes matching items, what is an appropriate name of the field that stores include or exclude? When displaying a list of filters to a user, what is a good way to label the include or exclude value? (as a bonus, can anyone recommend a good implementation of this kind of filtering for inspiration?)

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• How to apply a filter to the screen of a running program?

  - by Shahbaz

  The idea is to take old games without modifying them, but have the graphics card apply a series of filters to their output before sending them to the monitor. A very crude example would be to take a game that has a resolution of 640x480 and do: Increase the resolution to 1280x960 Apply a blur (low pass filter) Apply a sharpen (1 + high pass filter) These steps may not necessarily be the best to improve the visuals of an old game, but there are a lot of techniques that are well-known in image processing for this purpose. The question is, do the (NVidia) graphics cards give the ability to load a program that modifies the screen before sending it to the monitor? If so, how are they called and what terminology should I use to search? I would be comfortable with doing the programming myself if this ability is part of a library. Also, would the solution be different between Windows and Linux? If so, either is fine, since most of the games are probably runnable by wine.

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• Facebook Java API

  - by Filippo

  I'd like to write a program in java (not a servlet, not jsp, not a webapp) which allows me to do simple things, such as connecting to a FB account and retrieve the status or posts on the wall. I know facebook no longer supports official JavaAPI, so I was wondering what are the best (and most simple, being the program very basic) unofficial api out there. If possible, i would also like some example-code. searching through the web, I've read that you need two secret keys to create a facebook application, and I have not a fb account. Is it indispensable to have an account? thank you everyone

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• take my Java skills to the next level

  - by waingram

  I am well versed in the basics of Java programming, although through most of my career I have been maintaining, upgrading, and debugging someone else's Java code. I am mainly familiar with basic servlet applications. I have a strong beginner knowledge of Maven and Ant. I have more web development with Ruby on Rails, but would like to bring my Java skills up to par with regard to web development. It seems the world of Java is so big, I have no idea what the next logical step is for me. Spring? JAX-RB? EJBs? What is the next logical step for someone like me and how would you recommend I approach it?

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• Is it reasonable for REST resources to be singular and plural?

  - by Evan

  I have been wondering if, rather than a more traditional layout like this: api/Products GET // gets product(s) by id PUT // updates product(s) by id DELETE // deletes (product(s) by id POST // creates product(s) Would it be more useful to have a singular and a plural, for example: api/Product GET // gets a product by id PUT // updates a product by id DELETE // deletes a product by id POST // creates a product api/Products GET // gets a collection of products by id PUT // updates a collection of products by id DELETE // deletes a collection of products (not the products themselves) POST // creates a collection of products based on filter parameters passed So, to create a collection of products you might do: POST api/Products {data: filters} // returns api/Products/<id> And then, to reference it, you might do: GET api/Products/<id> // returns array of products In my opinion, the main advantage of doing things this way is that it allows for easy caching of collections of products. One might, for example, put a lifetime of an hour on collections of products, thus drastically reducing the calls on a server. Of course, I currently only see the good side of doing things this way, what's the downside?

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• CommonFilter 0.3D now released on CodePlex.

  CommonFilter is a subset of the CommonData project, containing just the functions and unit tests for filtering user input. The functions include filters for: Input of upper case and lower case alpha Input of numeric fields Input of text containing HTML markup to check that it only contains permitted markup. The general functions are available both as a form that silently drops non-permitted characters or in a try-parse format....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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• Stop Google Analytics from appending hostname?

  - by Nick Q.

  I've come across an Analytics profile that is appending the rest of a URL to the end of a page's path. For example when looking at the page that exists at http://example.com/page I would expect to see /page but instead it shows me /page/http://example.com/. The profile has no filters applied to it, and until July was reporting as expected (/page), in July the site in question switched hosts (and absolutely nothing else, so I'm not sure that's the problem). The analytics code on the site is the standard Google Async code with a domain set. All other profiles for the site show /page as expected. Any ideas as to how I can get the profile to function as expected?

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• CommonFilter 0.3D now released on CodePlex.

  CommonFilter is a subset of the CommonData project, containing just the functions and unit tests for filtering user input. The functions include filters for: Input of upper case and lower case alpha Input of numeric fields Input of text containing HTML markup to check that it only contains permitted markup. The general functions are available both as a form that silently drops non-permitted characters or in a try-parse format....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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• Jazoon, JAX California, and Brazilian week - it's conference season again

  - by alexismp

  Sparky is on the road again with GlassFish presence around the world in multiple conferences. This past week Jazoon in Zurich had Java EE, GlassFish, JAX-RS, Servlet, JSF all covered while JAX in California also had a good number of Java EE-related talks (see this Java EE 7 article). FISL, the largest Open Source conference in Brazil (7500 participants last year) is coming up this week with OpenJDK, GlassFish, JavaFX, NetBeans, Java EE 7, and of course JDK 7 all covered by subject matter experts. Expect most of these talks and possibly demos to show up here on TheAquarium, on slideshare or on our YouTube channel.

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• APress Deal of the Day - 19/Nov/2011 - Beginning GIMP

  - by TATWORTH

  Today's$10 Deal of the Day from APress at http://www.apress.com/9781430210702 is "Beginning GIMP". "In this fully-updated second edition, author and long-time member of the GIMP community Akkana Peck introduces the GIMP and shows you everything about it that you'll want to know—including how to prepare images for display on web pages, touch up digital photos, tap into powerful filters, effects, and plug-ins, and automate tasks using scripts." For those of you unfamilar with GIMP it is the GNU Image Manipulation Program and it is available for free from http://www.gimp.org/downloads/   Can't code withoutThe best C# & VB.NET refactoring plugin for Visual Studio

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• Jersey 2.0 Milestone 2 Now Available

  - by arungupta

  Jersey 2.0 milestone 2 is now available. It builds upon the first milestone and adds several new features such as server-side asynchronous processing, server-side content negotiation, improved JAX-RS parameter injection, and several others. The REST endpoints can be published on Java SE HTTP Server, Grizzly 2 HTTP container, and some basic Servlet-based deployments. It also provides HTTPURLConnection-based client API implementation. Read about these and more about what's new in Marek's detailed post. Of course this is also the future reference implementation for JAX-RS 2.0. Feel like trying it out? Simply go to Maven Central (of course none of this is production quality at this point). The latest JAX-RS Javadocs and Jersey 2.0 API docs are good starting points to explore. And provide them feedback at [email protected].

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• What is the good way of sharing specific data between ViewModels

  - by voroninp

  We have IAppContext which is injected into ViewModel. This service contains shared data: global filters and other application wide properties. But there are cases when data is very specific. For example one VM implements Master and the second one - Details of selected tree item. Thus DetailsVm must know about the selected item and its changes. We can store this information either in IAppContext or inside each concerned VM. In both cases update notifications are sent via Messenger. I see pros and cons for any of the approaches and can not decide which one is better. 1st: + explicitly exposed shared proerties, easy to follow dependencies - IAppContxt becomes cluttered with very specific data. 2nd: the exact opposite of the first and more memory load due to data duplication. May be someone can offer design alternatives or tell that one of the variants is objectively superior to the other cause I miss something important?

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• New to Maven-- Creating Java EE Projects

  - by M.C.

  Greetings-- I've been developing Java EE web apps with Eclipse for about a year. My employer doesn't use Maven, but the more I read about it, the more convinced I am that Maven + Hudson will be greatly beneficial for us. First, though, I have to become comfortable with those technologies in my spare time, so that I can create a proof-of-concept. Right now, I'm still a Maven newbie. Is there a set of best practices for creating Java EE web apps with Maven? For example, I could create a project with a basic archetype and then add all of the necessary JARs by putting dependencies in the POM for the servlet container, EJB, EclipseLink, etc... That might work, but it might not be the best way to do it. I'd greatly appreciate any guidance that you could provide on this topic. Thank you very much!

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• OpenGL : Keeping alpha in a render buffer

  - by Cyan

  In my current task, i need to render a texture into a render buffer, in order to work on it (apply special filters) there. The result is then considered a "new texture", which is later displayed. This works fine, except when the texture contains some transparent/semi-transparent parts. My current guess it that, within the render buffer, the texture is "merged" with a kind of "grey background". In this case, it obviously impacts the R,G,B color components of transparent pixels. I've yet to find a way around this. Even manually assigning alpha after the rendering process doesn't save the day for semi-transparent pixels, which RGB are "tainted" by the grey background.

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• Does any CMS natively support something like aquaBrowser/Vufind

  - by nus

  What I'm looking for is to set up a CMS website with a tag cloud/search system where when you click a tag it shows as a search filter, and you get a new tag cloud which only shows tags from the articles that have the primary tag. This should let the user easily include or exclude tags from the search. Also i would like to let the user filter on publication date by using a slider... Check this for an example of how aquabrowser does this (just search for something and play with the tag cloud): http://kidscatalog.columbuslibrary.org It's not perfectly what I want and I don't want to use flash, but I like the concept alot. If something like this does not exist and i might have to code it myself, which cms is most recommended (eg easy to extend, already has tag clouds and search filters,...)

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• CDI 1.1 Public Review and Feedback

  - by reza_rahman

  CDI 1.1 is humming along nicely and recently released it's public review draft. Although it's just a point release, CDI 1.1 actually has a lot in it. Some the changes include: The CDI class, which provides programmatic access to CDI facilities from outside a managed bean Ability to veto beans declaratively using @Vetoed Conversations in Servlet requests Application lifecycle events in Java EE Injection of Bean metadata into bean instances Programmatic access to a container provided Producer, InjectionTarget, AnnotatedType Ability to override attributes of a Bean via BeanAttributes Ability to process modules via ProcessModule Ability to wrap the InjectionPoint Honor WEB-INF/classes/META-INF/beans.xml to activate WEB-INF/classes in a bean archive Global ordering and enablement of interceptors and decorators Global selection of alternatives @New deprecated Clarify interceptors and decorators must be implemented using proxying Allow multiple annotated types per Java class Allow Extensions to specify the annotations that they are interested in The CDI 1.1 expert group has a number of open issues that they would like immediate feedback on. These include critical issues like bean visibility, startup events and restricting CDI scans. Read the details here and let your voice be heard!

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• Mount Bluetooth USB in VirtualBox

  - by GoBrewers14

  I originally asked this question here Python Module PyBluez Error and have narrowed it down to basically I can't get VBox to recognize my bluetooth USB. I'm on a MAC OS X 10.9.2. I've installed VirtualBox as well as the Extension Pack and I've installed Ubuntu Desktop 10.04.4 on the VirtualBox. I've searched several Mac forums and this seems to be a common problem w/o a clear solution. Anyways, the question is how can I get VirtualBox to let Ubuntu recognize my bluetooth USB? I've checked 'Enable USB 2.0 EHCI Controller' and added my two bluetooth devices to the filters list. and when I click here to mount the USB I get this error message... Any ideas? Thanks, John

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• Are session aware Models a bad thing?

  - by kevtufc

  I'm thinking specifically in Rails here, but I suspect this is a wider question. In a Rails web application I'm using data from the session in models in order that the models know who is logged in. I use this in a method which filters out some data from the database depending on a very simple permissions system. The thing is: using sessions in models in Rails requires a bit of a workaround. It works, but I've a feeling that it's something that I shouldn't be doing and I'm worried there's a big gotcha I'm missing. I suppose the Right Thing To Do would be to return all the data and filter out the not-wanted bits in the controller before passing that to the view, but doing it in the model seems to avoid quite a bit of code duplication and so feels "cleaner." Can anyone tell me why or shouldn't do this? Or that it's not a problem?

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