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• ArchBeat Link-o-Rama Top 10 for August 19-26, 2012

  - by Bob Rhubart

  The Top 10 most popular items shared via the OTN ArchBeat Facebook page for the week of August 19-26, 2012. Now Available: Oracle SQL Developer 3.2 (3.2.09.23) The latest release of Oracle SQl Developer includes UI enhancements, 12c database support, and bug fixes. ADF Tutorial Chapter 3: Creating a Master-Detail taskflow | Yannick Ongena Oracle ACE Yannick Ongena continues his ADF tutorial with a chapter devoted to view layer and using the data control to build pages that allow user to update reference data. GlassFish Community Event at JavaOne 2012 Don't miss out on this exclusive GlassFish Community Event on Sunday, September 30th from 11:00 a.m. – 1:00 p.m. in Moscone South. Register Now! Part of JavaOne 2012. Oracle BI 11g Book Authors – Podcast #9 | Art of Business Intelligence In this home-grown podcast, authors Christian Screen, Haroun Khan, and Adrian Ward talk about their new book, "Oracle Business Intelligence Enterprise Edition 11g: A Hands-On Tutorial," about their sessions at Oracle OpenWorld, and about their ORACLENERD t-shirts. Oracle Service Bus duplicate message check using Coherence | Jan van Zoggel "Giving the fact that every message on our ESB has an unique messageID element in the SOAP header we could store this on disk, database or in memory,"says Jan van Zoggel. "With the help of Oracle Coherence this last option, in memory, is relatively simple." Even simpler with Jan's detailed instructions. Oracle Technology Network Architect Day - Boston - Sept 12 There are easier ways to increase your IT brainpower. Skip the electrodes and register for Oracle Technology Network Architect Day in Boston, September 12, 2012. This free event includes 8 technical sessions, panel Q&A, roundtable discussions—and a free lunch. 8:00 a.m. – 5:00 p.m. at the Boston Marriott Burlington, One Burlington Mall Road, Burlington, MA 01803. Oracle BPM enable BAM | Peter Paul van de Beek "BAM enables you to make decisions based on real-time information gathered from your running processes," says Peter Paul van de Beek. "With BPMN processes you can use the standard Business Indicators that the BPM Suite offers you and use them to with BAM without much extra effort." Sample Application for Switching Application Module Data Sources | Andrejus Baranovskis A sample application and how-to guide from Oracle ACE Director and ADF expert Andrejus Baranovskis. ORCLville: Some Basic BI Thoughts "If we'd stop to consider what business intelligence really is, many of us might grow a different perspective about how we implement enterprise apps," says Oracle ACE Director Floyd Teter. "What if we implemented with an eye to what kind of information we'd like to get from our enterprise apps?" Oracle VM VirtualBox 4.1.20 released |Oracle's Virtualization Blog Oracle VM VirtualBox 4.1.20 was just released at the community and Oracle download sites, reports the Fat Bloke. This is a maintenance release containing bug fixes and stability improvements. Thought for the Day "The programmer, like the poet, works only slightly removed from pure thought-stuff. He builds his castles in the air, from air, creating by exertion of the imagination. Few media of creation are so flexible, so easy to polish and rework, so readily capable of realizing grand conceptual structures." — Frederick P. Brooks Source: SoftwareQuotes

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• ArchBeat Link-o-Rama Top 10 for October 7-13, 2012

  - by Bob Rhubart

  The Top 10 items shared via the OTN ArchBeat Facebook page for the week of October 7-13, 2012. OOW12: Oracle Business Process Management/Oracle ADF Integration Best Practices | Andrejus Baranovskis The Oracle OpenWorld presentations keep coming! Oracle ACE Director Andrejus Baranovskis shares the slides from "Oracle Business Process Management/Oracle ADF Integration Best Practices," co-presented with Danilo Schmiedel from Opitz Consulting. Oracle's Analytics, Engineered Systems, and Big Data Strategy | Mark Rittman Part 1 of 3 in Oracle ACE Director Mark Rittman's series on Oracle Exalytics, Oracle R Enterprise and Endeca. Adaptive ADF/WebCenter template for the iPad | Maiko Rocha Oracle Fusion Middleware A-Team member Maiko Rocha responds to a a customer request for information about how to create an adaptive iPad template for their WebCenter Portal application, "a specific template to streamline their workflow on the iPad." Following the Thread in OSB | Antony Reynolds Antony Reynolds recently led an Oracle Service Bus POC in which his team needed to get high throughput from an OSB pipeline. "Imagine our surprise when, on stressing the system, we saw it lock up, with large numbers of blocked threads." He shares the details of the problem and the solution in this extensive technical post. WebCenter Sites Gadget Development Concepts Quickstart | John Brunswick What are Gadgets? "At their most basic level they can be thought of as lightweight portlets that run largely on the client side of an architecture," says John Brunswick. "Gadgets provide a cross-platform container to run reusable UI modules that generally expose dynamic information to an end user, allowing for some level of end user customization." Oracle Fusion Middleware Security: OAM and OIM 11g Academies Looking for technical how-to content covering Oracle Access Manager and Oracle Identity Manager? The people behind the Oracle Middleware Security blog have indexed relevant blog posts into what they call Academies. "These indexes contain the articles we've written that we believe provide long lasting guidance on OAM and OIM. Posts covered in these series include articles on key aspects of OAM and OIM 11g, best practice architectural guidance, integrations, and customizations." Fusion Applications Technical Tips | Naveen Nahata "Setting memory parameters for Admin and Managed servers of various domains in Fusion Applications can be, let us say, a little daunting," says Oracle Fusion Middleware A-Team member Naveen Nahata. "While all this may look complicated and intimidating, it is actually relatively simple once you understand how it all works." Updated Agenda for OTN Architect Day Los Angeles (Oct 25) In less than two weeks Oracle Architect Day rolls into Los Angeles, with a full slate of sessions devoted to cloud computing, engineered systems, and SOA. Follow the link for the updated event agenda. ORCLville: OOW 2012 - A Not So Brief Recap Oracle ACE Director Floyd Teter, an Applications & Apps Technology specialists, shares his personal, frank, and and extensive recap or Oracle OpenWorld 2012. SOA Suite create partition in Enterprise Manager | Peter Paul van de Beek "In Oracle SOA Suite 10g, or more specific BPEL 10g, one could group functionality in domains," says Peter Paul van de Beek. "This feature has been away in the early versions of SOA Suite 11g. They have returned in more recent version and can be used for all SCA composites (instead of BPEL only). Nowadays these 10g domains are called partitions." Thought for the Day "I strive for an architecture from which nothing can be taken away." — Helmut Jahn Source: BrainyQuote.com

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• Play in NetBeans IDE (Part 2)

  - by Geertjan

  Peter Hilton was one of many nice people I met for the first time during the last few days constituting JAX London. He did a session today on the Play framework which, if I understand it correctly, is an HTML5 framework. It doesn't use web.xml, Java EE, etc. It uses Scala internally, as well as in its templating language.  Support for Play would, I guess, based on the little I know about it right now, consist of extending the HTML5 application project, which is new in NetBeans IDE 7.3. The workflow I imagine goes as follows. You'd create a new HTML5 application project, at which point you can choose a variety of frameworks and templates (Coffee Script, Angular, etc), which comes out of the box with the HTML5 support (i.e., Project Easel) in NetBeans IDE 7.3. Then, once the project is created, you'll right-click it and go to the Project Properties dialog, where you'll be able to enable Play support: At this stage, i.e., when you've checked the checkbox above and then clicked OK, all the necessary Play files will be added to your project, e.g., the routes file and the application.conf, for example. And then you have a Play application. Creating support in this way entails nothing more than creating a module that looks like this, i.e., with one Java class, where even the layer.xml file below is superfluous: All the code in the PlayEnablerPlanel.java that you see above is as follows: import java.awt.BorderLayout; import javax.swing.JCheckBox; import javax.swing.JComponent; import javax.swing.JPanel; import org.netbeans.spi.project.ui.support.ProjectCustomizer; import org.netbeans.spi.project.ui.support.ProjectCustomizer.Category; import org.openide.util.Lookup; public class PlayEnablerPanel implements ProjectCustomizer.CompositeCategoryProvider {     @ProjectCustomizer.CompositeCategoryProvider.Registration(             projectType = "org.netbeans.modules.web.clientproject",             position = 1000)     public static PlayEnablerPanel enablePlay() {         return new PlayEnablerPanel();     }     @Override     public Category createCategory(Lookup lkp) {         return ProjectCustomizer.Category.create("Play Framework", "Configure Play", null);     }     @Override     public JComponent createComponent(Category ctgr, Lookup lkp) {         JPanel playPanel = new JPanel(new BorderLayout());         playPanel.add(new JCheckBox("Enable Play"), BorderLayout.NORTH);         return playPanel;     } } Looking forward to having a beer with Peter soon (he lives not far away, in Rotterdam) to discuss this! Also read Part 1 of this series, which I wrote some time ago, and which has other ideas and considerations.

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• ??Java EE?????????????????????????????????--Java Day Tokyo 2013????

  - by ???Y

  ???Web????????????????????????1???????????????Struts 1???????????????????????????????????????????????????1????????????????????????·?????????????????????????????Java EE 6?Java EE 7?????Java EE????????????????????????????????2013?5?14????????Java Day Tokyo 2013???????????????????????·???·????J2EE??????????????Java EE?????Java EE????????????????????????????????(???) Java EE????????????????? ?????? ?????????????? ?????????????????????????????&IT????????????????? ??????????????????? Java SE??Java Embedded(????Java)????????????Java???????????Java Day Tokyo 2013???????????????????????Java EE??????????1????????????Java????????????·??????????????????????????????????J2EE 1.4?????Java EE???????Java EE???????????????????????????????? ???????????????Java?????????????????????1999?????????????????????J2EE 1.2???????Web??????????????·??????????????????????????????Java EE???2006?????????Java EE 5????AOP(??????????????)?CoC(Conventions over Configurations:???????)?DI(Dependency Injection:??????)???????????????????????????????????????????????????????6?????????Java EE 7????????????? ?????????Java EE????????????????????????????????????????????????????????????Java EE?????????????????????????????????????? "??????"?????????????????????????????????????????????????????????????????????????????????????(???)?????? ?????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????(???) ???Java EE??????????????????????????????????? ??????????Java EE???????????????????????????4?????? ? ?????????????? ? ??????????????????????????????? ? ??????????????? ? ?????????????? ?????????????????????????????????????????????? Java EE?????????????? ????????????????????????? ????????????? ???????????????????????????????????????????????????????? Java EE????????????3?????? ??????????????Java EE???????Java EE??????????????????????????3????????????????????????(1)DRY???????????????????(2)JSF??????????·????????(3)CDI???????????????????? ?(1)DRY(Don't Repeat Yourself)???????????????????????Java EE?????????????Java EE???????????????????"??"?????????????????? ?????????Java EE??????????????????????????Java EE??????????????API?????????????????????????????????????????????????????????????????????????????????Java EE???????????????????????????????????????????????????????????????? ????Java EE??????????·????????J2EE 1.4??????????????????????????????????????????????????????????????????????? ?????? ?Java EE 6?????????????????! ?Java EE?????"????"??????????Java EE 6????????·???????????????????? ?Java EE 6?????????????????! ?Java EE?????"????"??????????Java EE 6????????·???????????????????? ???Java EE 6????Web????????·??????????????????????????????????????????????????????????????Java EE??????????????????????????????????????????????(???) ???????????Web??????????????????????????????Java EE?????????????????????????????????????????J2EE 1.4?????????????????????????Java EE???????????????? ?????????????????????????????????Java EE??????????????????????????????????????????????????????????????????????????????????????????????????? JSF??????????·???????????? ?(2)JSF??????????·????????????????·???????(UI)???????????JSF????????????????????Struts?????????????·??????????????????????????Java EE????????????1?????????????? ?????????????????????????????????????????????????????????????????????????????????????????????(??????)???????????????????? ?????????????SIer??????????????????????????Java EE?????????????????????????????????????????????????????????????????(???) ?????? ?"??"???"????"?Java EE?? ?????????????? ????--?WebLogic Server 12c Forum 2013????? ?"??"???"????"?Java EE?? ?????????????? ????--?WebLogic Server 12c Forum 2013????? ???2013?4??Struts 1???????????????????????????Java EE???????????????1??? Java EE?1?????JSF??????UI??????????Java??????????????????????????????????????????????·???????????????JSF??????????????HTTP?????????????????????????????????????????????????????????????????? ???JSF 2.x?Web????????·?????????????????????????????????Struts?????????????????????????Java EE???????????????????? ?????? ??Web?????????????/????·?????????????????????--?????(?????)?Java EE 6??????????? ??????????JSF????????????????????????????????????????????????????JAX-RS??????·??????????????????·????????????????·????????????Java EE??????????·?????????????????????????????????????????????????????????????????????????????????????(???) CDI???????????????????? ????(3)CDI??????????????????????CDI(Contexts and Dependency Injection)??Java EE???????DI???????????????J2EE 1.4?????????????????????????????????????????????????????????????????????????????????????????????????????????????? ?????CDI???????????????????????????????????????????(??)????????????????????????API??????????????????????????????????????????????????????????????? CDI???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ??CDI???????????????????????????????????????????????????????????????????????????????????????????????????Java EE?????????????????????????????? ????????????????????Java EE???????? ???????????????3????????????????? ?????Java EE???????????????3??????????Java EE???????????? ??????????????????????????????????????????? ?????????Java EE????????????????????????????Java EE??????????????????????????????????????????????????????????????????????Java EE???????????? ???????Java???????????????Java EE???????????????????????????????Java EE?????????????????????????????????????(???)

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• Top-Rated JavaScript Blogs

  - by Andreas Grech

  I am currently trying to find some blogs that talk (almost solely) on the JavaScript Language, and this is due to the fact that most of the time, bloggers with real life experience at work or at home development can explain more clearly and concisely certain quirks and hidden features than most 'Official Language Specifications' Below find a list of blogs that are JavaScript based (will update the list as more answers flow in): DHTML Kitchen, by Garrett Smith Robert's Talk, by Robert Nyman EJohn, by John Resig (of jQuery) Crockford's JavaScript Page, by Douglas Crockford Dean.edwards.name, by Dean Edwards Ajaxian, by various (@Martin) The JavaScript Weblog, by various SitePoint's JavaScript and CSS Page, by various AjaxBlog, by various Eric Lippert's Blog, by Eric Lippert (talks about JScript and JScript.Net) Web Bug Track, by various (@scunliffe) The Strange Zen Of JavaScript , by Scott Andrew Alex Russell (of Dojo) (@Eran Galperin) Ariel Flesler (@Eran Galperin) Nihilogic, by Jacob Seidelin (@llimllib) Peter's Blog, by Peter Michaux (@Borgar) Flagrant Badassery, by Steve Levithan (@Borgar) ./with Imagination, by Dustin Diaz (@Borgar) HedgerWow (@Borgar) Dreaming in Javascript, by Nosredna spudly.shuoink.com, by Stephen Sorensen Yahoo! User Interface Blog, by various (@Borgar) remy sharp's b:log, by Remy Sharp (@Borgar) JScript Blog, by the JScript Team (@Borgar) Dmitry Baranovskiy’s Web Log, by Dmitry Baranovskiy James Padolsey's Blog (@Kenny Eliasson) Perfection Kills; Exploring JavaScript by example, by Juriy Zaytsev DailyJS (@Ric) NCZOnline (@Kenny Eliasson), by Nicholas C. Zakas Which top-rated blogs am I currently missing from the above list, that you think should be imperative to any JavaScript developer to read (and follow) concurrently?

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• Defining reliable SIlverlight 4 architecture

  - by doteneter

  Hello everybody, It's my first question on SO. I know that there were many topics on Silverlight and architecture but didn't find answers that satisfies me. I'm ASP.NET MVC developer and are used to work on architectures built with the best practices (loose coupling with DI, etc.) Now I'm faced to the new Silverlight 4 project and would like to be sure I'm doing the best choices as I'm not experienced. Main features required by the applications are as follows : use existing SQL Server Database but with possibility to move to the cloud. using EF4 for the data acess with SQL Server. exitensibility : adding new modules without changing the main host. loose coupling. I was looking at different webcasts (Taulty, etc.), blogs about Silverlight and came up with the following architecture. EF 4 for data access (as specified with the requirements) WCF RIA Services for mid-tiers controling access to data for queries and enabling end-to-end support for data validation, authentication and roles. MEF Support for enabling modules. Unity 2.0 for DI. The problem is that I don't know how to define a reliable architecture where all these elements play well together. Should I use a framework instead like Prism or Caliburn? But for now I'm not sure what scenarios they support. What's the best usages for Unity in Silverlight ? I used to use IoC in ASP.NET MVC for loos coupling and other things like interception for audit logging. It seems that for Silverlight Unity doesn't support Interception. I would like to use it to enable loose coupling and to enable to move to the cloud if needed. Thanks in advance for your help.

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• Where should I declare my CDI resources?

  - by Laird Nelson

  JSR-299 (CDI) introduces the (unfortunately named) concept of a resource: http://docs.jboss.org/weld/reference/1.0.0/en-US/html/resources.html#d0e4373 You can think of a resource in this nomenclature as a bridge between the Java EE 6 brand of dependency injection (@EJB, @Resource, @PersistenceContext and the like) and CDI's brand of dependency injection. The general gist seems to be that somewhere (and this will be the root of my question) you declare what amounts to a bridge class: it contains fields annotated both with Java EE's @EJB or @PersistenceContext or @Resource annotations and with CDI's @Produces annotations. The net effect is that Java EE 6 injects a persistence context, say, where it's called for, and CDI recognizes that injected PersistenceContext as a source for future injections down the line (handled by @Inject). My question is: what is the community's consensus--or is there one--on: what this bridge class should be named where this bridge class should live whether it's best to localize all this stuff into one class or make several of them ...? Left to my own devices, I was thinking of declaring a single class called CDIResources and using that as the One True Place to link Java EE's DI with CDI's DI. Many examples do something similar, but I'm not clear on whether they're "just" examples or whether that's a good way to do it. Thanks.

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• Validation without ServiceLocator

  - by Dmitriy Nagirnyak

  Hi, I am getting back again and again to it thinking about the best way to perform validation on POCO objects that need access to some context (ISession in NH, IRepository for example). The only option I still can see is to use S*ervice Locator*, so my validation would look like: public User : ICanValidate { public User() {} // We need this constructor (so no context known) public virtual string Username { get; set; } public IEnumerable<ValidationError> Validate() { if (ServiceLocator.GetService<IUserRepository>().FindUserByUsername(Username) != null) yield return new ValidationError("Username", "User already exists.") } } I already use Inversion Of control and Dependency Injection and really don't like the ServiceLocator due to number of facts: Harder to maintain implicit dependencies. Harder to test the code. Potential threading issues. Explicit dependency only on the ServiceLocator. The code becomes harder to understand. Need to register the ServiceLocator interfaces during the testing. But on the other side, with plain POCO objects, I do not see any other way of performing the validation like above without ServiceLocator and only using IoC/DI. So the question would be: is there any way to use DI/IoC for the situation described above? Thanks, Dmitriy.

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• accepts_nested_attributes_for and nested_form plugin

  - by Denis

  Hi folks, I've the following code in a _form.html.haml partial, it's used for new and edit actions. (fyi I use the Ryan Bates' plugin nested_form) .fields - f.fields_for :transportations do |builder| = builder.collection_select :person_id, @people, :id, :name, {:multiple => true} = builder.link_to_remove 'effacer' = f.link_to_add "ajouter", :transportations works fine for the new action... for the edit action, as explain in the doc, I've to add the :id of already existing associations, so, I've to add something like = builder.hidden_field :id, ?the value? if ?.new_record? How can I get the value? Here is the doc of accepts_nested_attributes_for for reference (source: http://github.com/rails/rails/blob/master/activerecord/lib/active_record/nested_attributes.rb#L332) # Assigns the given attributes to the collection association. # # Hashes with an <tt>:id</tt> value matching an existing associated record # will update that record. Hashes without an <tt>:id</tt> value will build # a new record for the association. Hashes with a matching <tt>:id</tt> # value and a <tt>:_destroy</tt> key set to a truthy value will mark the # matched record for destruction. # # For example: # # assign_nested_attributes_for_collection_association(:people, { # '1' => { :id => '1', :name => 'Peter' }, # '2' => { :name => 'John' }, # '3' => { :id => '2', :_destroy => true } # }) # # Will update the name of the Person with ID 1, build a new associated # person with the name `John', and mark the associatied Person with ID 2 # for destruction. # # Also accepts an Array of attribute hashes: # # assign_nested_attributes_for_collection_association(:people, [ # { :id => '1', :name => 'Peter' }, # { :name => 'John' }, # { :id => '2', :_destroy => true } # ]) Thanks for your help.

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• How to connect remote EJB module from application client

  - by Zeck

  Hi guys, I have a EJB module in remote Glassfish server and application client in my computer. I want to connect from the application client to the remote EJB. Here is the my EJB interface: @Remote public interface BookEJBRemote { public String getTitle(); } Here is the my ejb: @Stateless public class BookEJB implements BookEJBRemote { @Override public String getTitle() { return "Twenty Thousand Leagues Under the Sea"; } } I have several questions : Can I use Dependency Injection in the remote application client to connect to the ejb? If so what can i do to achieve this. Do i need to configure in the sun-ejb-jar.xml and sun-application-client.xml? In other words, if i use DI like @EJB MyEJBRemote ejb; How application client container know what ejb to be injected? Where should i specify the information? How can i run the application client? I tried to run package-appclient in the glassfish server to get appclient.jar and copy it to my computer. Then i type appclient.jar -client myAppClient.jar . It didn't work. How do i point the target server? if i cannot use DI in the client then i guess i have to use JNDI lookup. Do i need to configure jndi name in sun-ejb-jar.xml or in the sun-application-client.xml? No matter how i try i never manage to run application client ? Can you guys put some working example? And thank you for every advises and examples?

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• Formatting the parent and child nodes of a Treeview that is populated by a XML file

  - by Marina

  Hello Everyone, I'm very new to xml so I hope I'm not asking any silly question here. I'm currently working on populating a treeview from an XML file that is not hierarchically structured. In the xml file that I was given the child and parent nodes are defined within the attributes of the item element. How would I be able to utilize the attributes in order for the treeview to populate in the right hierarchical order. (Example Mary Jane should be a child node of Peter Smith). At present all names are under one another. root <item parent_id="0" id="1"><content><name>Peter Smith</name></content></item> <item parent_id="1" id="2"><content><name>Mary Jane</name></content></item> <item parent_id="1" id="7"><content><name>Lucy Lu</name></content></item> <item parent_id="2" id="3"><content><name>Informatics Team</name></content></item> <item parent_id="3" id="4"><content><name>Sandy Chu</name></content></item> <item parent_id="4" id="5"><content><name>John Smith</name></content></item> <item parent_id="5" id="6"><content><name>Jane Smith</name></content></item> /root Thank you for all of your help, Marina

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• .Net website create directory to remote server access denied

  - by tmfkmoney

  I have a web application that creates directories. The application works fine when creating a directory on the web server, however, it does not work when it tries to create a directory on our remote fileserver. The fileserver and the webserver are in the same domain. I have created a local user in our domain, "DOMAIN\aspnet". The local user is on both servers. I am running my .Net app pool under the domain user. I have also tried using windows impersonate in the web.config to run under the domain user. I have verified that the domain user has full control to the remote directory. In an effort to debug this I have also given the "everyone" full control to the remote directory. In an effort to debug this I have also added the domain user to the administrators group. I have a simple .net test page on the web server to test this. Through the test page I am able to read the directory on the file server and get a list of everything in it. I am not able to upload files or to create directories on the file server. Here's code that works: var path = @"\\fileserver\images\"; var di = new DirectoryInfo(path); foreach (var d in di.GetDirectories()) { Response.Write(d.Name); } Here's code that doesn't work: path = Path.Combine(path, "NewDirectory"); Directory.CreateDirectory(path); Here's the error I'm getting: Access to the path '\fileserver\images\NewDirectory' is denied. I'm pretty stuck on this. Any ideas?

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• Dependency Injection and decoupling of software layers

  - by cs31415

  I am trying to implement Dependency Injection to make my app tester friendly. I have a rather basic doubt. Data layer uses SqlConnection object to connect to a SQL server database. SqlConnection object is a dependency for data access layer. In accordance with the laws of dependency injection, we must not new() dependent objects, but rather accept them through constructor arguments. Not wanting to upset the DI gods, I dutifully create a constructor in my DAL that takes in SqlConnection. Business layer calls DAL. Business layer must therefore, pass in SqlConnection. Presentation layer calls Business layer. Hence it too, must pass in SqlConnection to business layer. This is great for class isolation and testability. But didn't we just couple the UI and Business layers to a specific implementation of the data layer which happens to use a relational database? Why do the Presentation and Business layers need to know that the underlying data store is SQL? What if the app needs to support multiple data sources other than SQL server (such as XML files, Comma delimited files etc.) Furthermore, what if I add another object upon which my data layer is dependent on (say, a second database). Now, I have to modify the upper layers to pass in this new object. How can I avoid this merry-go-round and reap all the benefits of DI without the pain?

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• Recursion Problems in Prolog

  - by Humble_Student

  I'm having some difficulties in prolog, I'm trying to write a predicate that will return all paths between two cities, although at the moment it returns the first path it finds on an infinite loop. Not sure where I'm going wrong but I've been trying to figure this out all day and I'm getting nowhere. Any help that could be offered would be appreciated. go:- repeat, f([],0,lon,spa,OP,OD), write(OP), write(OD), fail. city(lon). city(ath). city(spa). city(kol). path(lon,1,ath). path(ath,3,spa). path(spa,2,kol). path(lon,1,kol). joined(X,Y,D):- path(X,D,Y);path(Y,D,X). f(Ci_Vi,Di,De,De,PaO,Di):- append([De],Ci_Vi,PaO), !. f(Cities_Visited,Distance,Start,Destination,Output_Path,Output_Distance):- repeat, city(X), joined(Start,X,D), not_member(X,Cities_Visited), New_Distance is Distance + D, f([Start|Cities_Visited],New_Distance,X,Destination,Output_Path,Output_Distance). not_member(X,List):- member(X,List), !, fail. not_member(X,List). The output I'm expecting here is [spa,ath,lon]4 [spa,kol,lon]3. Once again, any help would be appreciated. Many thanks in advance.

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• Dependency Injection: How to maintain multiple configurations?

  - by Malax

  Hi StackOverflow, Lets assume we've build a system with a DI framework which is working quite fine. This system currently uses JMS to "talk" with other systems not maintained by us. The majority of our customers like the JMS approach and uses it according to our specification. The component which does all the messaging is injected with Spring into the rest of the application. Now we got the case that one customer cannot implement the JMS solution and want to use another messaging technology. Thats not a problem because we can simply implement a messaging service using this technology and inject it in the rest of the application. But how are we supposed to handle the deployment and maintenance of the configuration? Since the application uses Spring i could imagine to check in all the configurations i have for this application and the system administrator could start the application and passing the name of the DI XML file to specify which configuration should be loaded. But... it just don't feel right. Are there any solutions for such cases available? What are the best-practices you use? I could even imagine more complex scenarios which do not contain only one service substitution... Thanks a lot!

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• servlet resopnse data for autocomplete

  - by shams haque

  Hello experts, Following code is in php. i want to do same in java. Please tell me how do i generate this type of array or collection in java. I need this to response to json autocomplete. <?php $q = strtolower($_GET["q"]); if (!$q) return; $items = array( "Peter Pan"=>"[email protected]", "Molly"=>"[email protected]", "Forneria Marconi"=>"[email protected]", "Master Sync"=>"[email protected]", "Dr. Tech de Log"=>"[email protected]", "Don Corleone"=>"[email protected]", "Mc Chick"=>"[email protected]", "Donnie Darko"=>"[email protected]", "Quake The Net"=>"[email protected]", "Dr. Write"=>"[email protected]" ); $result = array(); foreach ($items as $key=>$value) { if (strpos(strtolower($key), $q) !== false) { array_push($result, array( "name" => $key, "to" => $value )); } } echo json_encode($result); ?>

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• Access denied for pdf to read using itextsharp at server level..

  - by apekshabs

  Am facing error after uploadind to server... as access denied .... can anyone help me.... Document myDocument = new Document(PageSize.A5, 26, 72, 180, 180); string strUniqueFn = "onlineinvoice.pdf"; string imgpath = "logo.gif"; string strUser = Thread.CurrentPrincipal.Identity.Name.Substring(Thread.CurrentPrincipal.Identity.Name.IndexOf("\\") + 1).ToUpper(); string strFolder = Server.MapPath("."); System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(strFolder); System.IO.FileInfo[] fi = di.GetFiles(strUser + "*.*"); for (i = 0; i <= fi.Length - 1; i++) { System.IO.File.Delete(strFolder + "\\" + strUniqueFn); } string strPath = strFolder + "\\" + strUniqueFn; PdfWriter pdfw = PdfWriter.GetInstance(myDocument, new FileStream(strPath, FileMode.Create)); string iPath = strFolder + "\\" + imgpath; pdfw.CloseStream = false; myDocument.Open(); ...................... myDocument.Close(); Am facing error at PdfWriter pdfw = PdfWriter.GetInstance(myDocument, new FileStream(strPath, FileMode.Create)); can anyone help me... Thank you

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• Api/plugins for open source libraries?

  - by fayer

  whenever i use a open source library eg. Doctrine i always ending up coding a class (so called Facade) to use the Doctrine library. so next time i want to create a user i just type: $fields = array('name' => 'peter', 'email' => '[email protected]'); Doctrine_Facade::create_entity($entity, $fields); then it creates an entity with the provided information. so i guess, all coders will create their own "Facade". i wonder how usual it is with open source Facades to download and interact with the open source libraries? is this rare cause i haven't seen any of these. in some frameworks i have seen them called plugins, eg. plugins for twitter api or facebook api. so whenever you download a library, should you search for plugins/facades on the net, or is it better to just try coding your own? i just thought it would be great for everyone not to reinvent the wheel. thanks.

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• Android Html.fromHtml

  - by user3688154

  hi take from database a String like this: "Frog Revolution <\strong<\span<\p\r\nUn mix perfetto di design e praticità, che stimola il piacere dello sguardo.<\span<\p\r\nLa Frog è una macchina da caffè espresso a cialde destinata sia al mercato domestico che quello aziendale. <\span<\p\r\nIl suo design innovativo, la sua semplicità e la qualità delle sue componenti, la rendono un bene strumentale affidabile a cui puntare in tutta tranquillità. <\span<\p\r\nDIMENSIONI:<\strong<\span<\p\r\n\r\nLarghezza: 22 cm <\span<\li\r\nAltezza: 40 cm<\span<\li\r\nProfondità: 32 cm<\span<\li\r\nPeso: 6.5 Kg<\span<\li\r\n<\ul\r\nCARATTERISTICHE TECNICHE<\strong<\span<\p\r\n\r\nPotenza normale 650 W <\span<\li\r\nVoltaggio 230 V<\span<\li\r\nSistema di decalcificazione rapido <\span<\li\r\nAlloggio bottiglia d'acqua <\span<\li\r\n<\ul\r\nACCESSORI<\strong<\span<\p\r\n\r\nVano porta cialde e bicchieri<\span<\li\r\n<\ul" now i try to put it in a TextView with Html.fromHtml() method…but without success..Can you help me?

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• Python creating a dictionary and swapping these into another file

  - by satsurae

  Hi all, I have two tab delimited .csv file. From one.csv I have created a dictionary which looks like: 'EB2430': ' "\t"idnD "\t"yjgV "\t"b4267 "\n', 'EB3128': ' "\t"yagE "\t\t"b0268 "\n', 'EB3945': ' "\t"maeB "\t"ypfF "\t"b2463 "\n', 'EB3944': ' "\t"eutS "\t"ypfE "\t"b2462 "\n', I would like to insert the value of the dictionary into the second.csv file which looks like: "EB2430" 36.81 364 222 4 72 430 101 461 1.00E-063 237 "EB3128" 26.04 169 108 6 42 206 17 172 6.00E-006 45.8 "EB3945" 20.6 233 162 6 106 333 33 247 6.00E-005 42.4 "EB3944" 19.07 367 284 6 1 355 1 366 2.00E-023 103 With a resultant output tab delimited: 'EB2430' idnD yjgV b4267 36.81 364 222 4 72 430 101 461 1.00E-063 237 'EB3128' yagE b0268 26.04 169 108 6 42 206 17 172 6.00E-006 45.8 'EB3945' maeB ypfF b2463 20.6 233 162 6 106 333 33 247 6.00E-005 42.4 'EB3944' eutS ypfE b2462 19.07 367 284 6 1 355 1 366 2.00E-023 103 Here is my code for creating the dictionary: f = open ("one.csv", "r") g = open ("second.csv", "r") eb = [] desc = [] di = {} for line in f: for row in f: eb.append(row[1:7]) desc.append(row[7:]) di = dict(zip(eb,desc)) Sorry for it being so long-winded!! I've not been programming for long. Cheers! Sat

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• How Does One Make Scala Control Abstraction in Repeat Until?

  - by peter_pilgrim

  Hi I am Peter Pilgrim. I watched Martin Odersky create a control abstraction in Scala. However I can not yet seem to repeat it inside IntelliJ IDEA 9. Is it the IDE? package demo class Control { def repeatLoop ( body: = Unit ) = new Until( body ) class Until( body: = Unit ) { def until( cond: = Boolean ) { body; val value: Boolean = cond; println("value="+value) if ( value ) repeatLoop(body).until(cond) // if (cond) until(cond) } } def doTest2(): Unit = { var y: Int = 1 println("testing ... repeatUntil() control structure") repeatLoop { println("found y="+y) y = y + 1 } { until ( y < 10 ) } } } The error message reads: Information:Compilation completed with 1 error and 0 warnings Information:1 error Information:0 warnings C:\Users\Peter\IdeaProjects\HelloWord\src\demo\Control.scala Error:Error:line (57)error: Control.this.repeatLoop({ scala.this.Predef.println("found y=".+(y)); y = y.+(1) }) of type Control.this.Until does not take parameters repeatLoop { In the curried function the body can be thought to return an expression (the value of y+1) however the declaration body parameter of repeatUntil clearly says this can be ignored or not? What does the error mean?

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• Join two list comparing their elements properties

  - by 100r

  public class Person() { int ID; string Name; DateTime ChangeDate } var list1 = new List<Person> { new Person { ID= 1, Name = "Peter", ChangeDate= "2011-10-21" }, new Person { ID= 2, Name = "John", ChangeDate= "2011-10-22" }, new Person { ID= 3, Name = "Mike", ChangeDate= "2011-10-23" }, new Person { ID= 4, Name = "Dave", ChangeDate= "2011-10-24" } }; var list2 = new List<Person> { new Person { ID= 1, Name = "Pete", ChangeDate= "2011-10-21" }, new Person { ID= 2, Name = "Johny", ChangeDate= "2011-10-20" }, new Person { ID= 3, Name = "Mikey", ChangeDate= "2011-10-24" }, new Person { ID= 5, Name = "Larry", ChangeDate= "2011-10-27" } }; As output I would like to have list1 + list2 = Person { ID= 1, Name = "Peter", ChangeDate= "2011-10-21" }, Person { ID= 2, Name = "John", ChangeDate= "2011-10-22" }, Person { ID= 3, Name = "Mikey", ChangeDate= "2011-10-24" }, Person { ID= 4, Name = "Dave", ChangeDate= "2011-10-24" } Person { ID= 5, Name = "Larry", ChangeDate= "2011-10-27" } And the Algorithm is like this. Join two list. If elements of lists have same ID, compare them by ChangeDate and take the ond with bigger date. If ChangeDate are equeal take any of them but not both. Maybe its easier to concat both lists and than to filter them with lambda. I tried, but always came out with some ugly code :/ Anyone have any idea?

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• SEO google keyword position tools?

  - by Peterl86

  Hi guys, I want to check our google postions for several keywords every day and make a note in a spreadseet. At the moment, we have a student doing it but it's a rubbish job and it doesn't seem fair on them! Are there any tools available to automate this process? I have tried rankchecker by seobook.com, but although that should be exactly what im looking for when i set scheduled tasks in that, it doesnt work. Any tips would be appreciated, thanks! peter EDIT: Liam has suggested a Python script to do this, which unfortunately isnt something I'm very familiar with! If anyone knows of a good tutorial or something to help us with this, that would be brilliant. Update: Found a php script at seoscript.net which looks like a step in the right direction. But I cant get it to work! I get this error. Anyone more knowledgabe than me know how to fix that? I have PEAR installed. thanks again, Peter

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• colorbox not displaying first caption from flickr gallery integration

  - by Mark

  I am pulling small thumbnails into my page from the flickr API, and using Colorbox to display larger thumbnails and captions from the title attribute. Using the API with C#. However, on the first instance of opening colorbox it does not display the caption from the anchors title attribute. If you click next or previous then it appears. The actual caption is physically there in the source code, just not getting put into the colorbox window. Demo here, if you click on a thumbnail you will see there is no caption, click next then prev and it will appear. Here's the code: <script type="text/javascript"> $(function() { $("a[rel='group']").colorbox({ opacity: 0.75 }); }); </script> <a href='http://farm6.static.flickr.com/5015/5511378425_e63d4a62f7.jpg' title='Little Hermit (Peter Dunn)' rel='group' class='tooltip'> <img src='http://farm6.static.flickr.com/5015/5511378425_e63d4a62f7_s.jpg' alt='Little Hermit (Peter Dunn)' /> </a> If i view source, the title attribute is populated with the caption, but if i ook in firebug it is not in the colorbox code. Any help on this would be great Ive ran out of ideas!

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• GetAccessControl error with NTAccount

  - by Adam Witko

  private bool HasRights(FileSystemRights fileSystemRights_, string fileName_, bool isFile_) { bool hasRights = false; WindowsIdentity WinIdentity = System.Security.Principal.WindowsIdentity.GetCurrent(); WindowsPrincipal WinPrincipal = new WindowsPrincipal(WinIdentity); AuthorizationRuleCollection arc = null; if (isFile_) { FileInfo fi = new FileInfo(@fileName_); arc = fi.GetAccessControl().GetAccessRules(true, true, typeof(NTAccount)); } else { DirectoryInfo di = new DirectoryInfo(@fileName_); arc = di.GetAccessControl().GetAccessRules(true, true, typeof(NTAccount)); } foreach (FileSystemAccessRule rule in arc) { if (WinPrincipal.IsInRole(rule.IdentityReference.Value)) { if (((int)rule.FileSystemRights & (int)fileSystemRights_) > 0) { if (rule.AccessControlType == AccessControlType.Allow) hasRights = true; else if (rule.AccessControlType == AccessControlType.Deny) { hasRights = false; break; } } } } return hasRights; } The above code block is causing me problems. When the WinPrincipal.IsInRole(rule.IdentityReference.Value) is executed the following exception occurs: "The trust relationship between the primary domain and the trusted domain failed.". I'm very new to using identities, principles and such so I don't know what's the problem. I'm assuming it's with the use of NTAccount? Thanks

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