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• How can I design multi-threaded application for larger user base

  - by rokonoid

  Here's my scenario, I need to develop a scalable application. My user base may be over 100K, every user has 10 or more small tasks. Tasks check every minute with a third party application through web services, retrieving data which is written in the database, then the data is forwarded to it's original destination. So here's the processing of a small task: while(true){ Boolean isNewInformationAvailable = checkWhetherInformationIsAvailableOrNot(); If(isNewInformationAvailable ==true){ fetchTheData(); writeToDatabase(); findTheDestination(); deliverTheData(); isAvailable =false; } } As the application is large, how should I approach designing this? I'm going to use Java to write it. Should I use concurrency, and how would you manage the concurrency?

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• Would Using a PHP Framework Be Beneficial in My Context?

  - by Fractal

  I've just started work at a small start-up company who mainly uses PHP to develop their front-end apps. I had no prior PHP experience before joining, and this has led to my apps becoming large pieces of spaghetti code. I essentially started by adding code to implement an initial feature, and then continued to hack in more code to implement further features – without much thought for the overall design. The apps themselves output XML to render on small mobile devices. I recently started looking into frameworks that I could use. I reckon an advantage would be that they seem to force developers to modularise their programs using good-practice design patterns. This seems great for someone in my position. The extra functions they provide, for example: interfacing with databases in such a way as to make SQL injection impossible, would be very useful too. The downside I can see is that there will be a lot of overhead for me in terms of the time taken to learn the framework itself (while still getting to grips with PHP itself). I'm also worried that it will be overkill for the scale of the apps we develop. They tend to be programs that interface with a fairly simple back-end DB, and will generate about 5 different XML screens. Probably around 1 or 2 thousand lines of code. The time it takes just to configure the frameworks may not be worth it. The final problem I can see is that developers in the company – who have to go over my code, and who do not know the PHP framework I may use – will have a much harder time understanding it. Given those pros and cons, I'm still not sure on what the best course of action will be; so any advice will be greatly appreciated.

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• Checking preconditions or not

  - by Robert Dailey

  I've been wanting to find a solid answer to the question of whether or not to have runtime checks to validate input for the purposes of ensuring a client has stuck to their end of the agreement in design by contract. For example, consider a simple class constructor: class Foo { public: Foo( BarHandle bar ) { FooHandle handle = GetFooHandle( bar ); if( handle == NULL ) { throw std::exception( "invalid FooHandle" ); } } }; I would argue in this case that a user should not attempt to construct a Foo without a valid BarHandle. It doesn't seem right to verify that bar is valid inside of Foo's constructor. If I simply document that Foo's constructor requires a valid BarHandle, isn't that enough? Is this a proper way to enforce my precondition in design by contract? So far, everything I've read has mixed opinions on this. It seems like 50% of people would say to verify that bar is valid, the other 50% would say that I shouldn't do it, for example consider a case where the user verifies their BarHandle is correct, but a second (and unnecessary) check is also being done inside of Foo's constructor.

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• Confused about implementing Single Responsibility Principle

  - by HichemSeeSharp

  Please bear with me if the question looks not well structured. To put you in the context of my issue: I am building an application that invoices vehicles stay duration in a parking. In addition to the stay service there are some other services. Each service has its own calculation logic. Here is an illustration (please correct me if the design is wrong): public abstract class Service { public int Id { get; set; } public bool IsActivated { get; set; } public string Name { get; set } public decimal Price { get; set; } } public class VehicleService : Service { //MTM : many to many public virtual ICollection<MTMVehicleService> Vehicles { get; set; } } public class StayService : VehicleService { } public class Vehicle { public int Id { get; set; } public string ChassisNumber { get; set; } public DateTime? EntryDate { get; set; } public DateTime? DeliveryDate { get; set; } //... public virtual ICollection<MTMVehicleService> Services{ get; set; } } Now, I am focusing on the stay service as an example: I would like to know at invoicing time which class(es) would be responsible for generating the invoice item for the service and for each vehicle? This should calculate the duration cost knowing that the duration could be invoiced partially so the like is as follows: not yet invoiced stay days * stay price per day. At this moment I have InvoiceItemsGenerator do everything but I am aware that there is a better design.

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• A better alternative to incompatible implementations for the same interface?

  - by glenatron

  I am working on a piece of code which performs a set task in several parallel environments where the behaviour of the different components in the task are similar but quite different. This means that my implementations are quite different but they are all based on the relationships between the same interfaces, something like this: IDataReader -> ContinuousDataReader -> ChunkedDataReader IDataProcessor -> ContinuousDataProcessor -> ChunkedDataProcessor IDataWriter -> ContinuousDataWriter -> ChunkedDataWriter So that in either environment we have an IDataReader, IDataProcessor and IDataWriter and then we can use Dependency Injection to ensure that we have the correct one of each for the current environment, so if we are working with data in chunks we use the ChunkedDataReader, ChunkedDataProcessor and ChunkedDataWriter and if we have continuous data we have the continuous versions. However the behaviour of these classes is quite different internally and one could certainly not go from a ContinuousDataReader to the ChunkedDataReader even though they are both IDataProcessors. This feels to me as though it is incorrect ( possibly an LSP violation? ) and certainly not a theoretically correct way of working. It is almost as though the "real" interface here is the combination of all three classes. Unfortunately in the project I am working on with the deadlines we are working to, we're pretty much stuck with this design, but if we had a little more elbow room, what would be a better design approach in this kind of scenario?

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• Use decorator and factory together to extend objects?

  - by TheClue

  I'm new to OOP and design pattern. I've a simple app that handles the generation of Tables, Columns (that belong to Table), Rows (that belong to Column) and Values (that belong to Rows). Each of these object can have a collection of Property, which is in turn defined as an enum. They are all interfaces: I used factories to get concrete instances of these products, depending on circumnstances. Now I'm facing the problem of extending these classes. Let's say I need another product called "SpecialTable" which in turn has some special properties or new methods like 'getSomethingSpecial' or an extended set of Property. The only way is to extend/specialize all my elements (ie. build a SpecialTableFactory, a SpecialTable interface and a SpecialTableImpl concrete)? What to do if, let's say, I plan to use standard methods like addRow(Column column, String name) that doesn't need to be specialized? I don't like the idea to inherit factories and interfaces, but since SpecialTable has more methods than Table i guess it cannot share the same factory. Am I wrong? Another question: if I need to define product properties at run time (a Table that is upgraded to SpecialTable at runtime), i guess i should use a decorator. Is it possible (and how) to combine both factory and decorator design? Is it better to use a State or Strategy pattern, instead?

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• Oracle SOA Partner Community Forum Lisbon, Portugal - 21/Apr/10

  - by Claudia Costa

    We would like to invite you to attend our SOA Partner Community Forum that will be in held in Lisbon, April 21, 2010 The Oracle SOA Partner Community Forum is a wonderful opportunity to: Meet with Oracle SOA and BPM Product management Exchange thoughts and knowledge with SOA and BPM experts Learn from successful SOA implementation Network within the Oracle SOA Partner Community During this highly informative event you can learn about partner success stories, participate in an array of breakout sessions, exchange information with other partners and enjoy a vibrant panel discussion. Places are limited, so register today. Registration only takes a few minutes and it is free of charge. By registration you will confirm that you will attend to the event. Seminar is free. In the event that you cancel your registration after April 16th 2010 Oracle may request that you will pay late cancellation fee of € 150. Please visit our website for further information. Alternatively, if you require assistance or have any queries please contact Jürgen Kress. Agenda 10:00     Welcome & Introduction 10:15     SOA Cloud presentation 11:15     SOA Partner Sales Campaign 12:30     Lunch break 13:15     Partner Reference Case 14:15     BPMN 2.0 15:00     Cocktail reception   Become a member of the SOA Partner Community - free of charge! Please first login at http://partner.oracle.com and then visit: http://www.oracle.com/goto/emea/soaThe goal of the SOA Partner Community is to provide you with the latest information on Oracle's SOA and BPM offerings and to facilitate the exchange of experience around Oracle SOA between community members.   The SOA Partner Community keeps you informed about: ·         News & Events ·         Product Information ·         Education & Certification ·         Analyst Report ·         Marketing & Sales ·         Monthly SOA Newsletter ·         Monthly SOA Webcast ·         SOA Community Forum ------------------------------------------------   Location: Lagoas Park Hotel 2740-245, Porto Salvo, Oeiras  

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• Memento with optional state?

  - by Korey Hinton

  EDIT: As pointed out by Steve Evers and pdr, I am not correctly implementing the Memento pattern, my design is actually State pattern. Menu Program I built a console-based menu program with multiple levels that selects a particular test to run. Each level more precisely describes the operation. At any level you can type back to go back one level (memento). Level 1: Server Type? [1] Server A [2] Server B Level 2: Server environment? [1] test [2] production Level 3: Test type? [1] load [2] unit Level 4: Data Collection? [1] Legal docs [2] Corporate docs Level 4.5 (optional): Load Test Type [2] Multi TIF [2] Single PDF Level 5: Command Type? [1] Move [2] Copy [3] Remove [4] Custom Level 6: Enter a keyword [setup, cleanup, run] Design States PROBLEM: Right now the STATES enum is the determining factor as to what state is BACK and what state is NEXT yet it knows nothing about what the current memento state is. Has anyone experienced a similar issue and found an effective way to handle mementos with optional state? static enum STATES { SERVER, ENVIRONMENT, TEST_TYPE, COLLECTION, COMMAND_TYPE, KEYWORD, FINISHED } Possible Solution (Not-flexible) In reference to my code below, every case statement in the Menu class could check the state of currentMemo and then set the STATE (enum) accordingly to pass to the Builder. However, this doesn't seem flexible very flexible to change and I'm struggling to see an effective way refactor the design. class Menu extends StateConscious { private State state; private Scanner reader; private ServerUtils utility; Menu() { state = new State(); reader = new Scanner(System.in); utility = new ServerUtils(); } // Recurring menu logic public void startPromptingLoop() { List<State> states = new ArrayList<>(); states.add(new State()); boolean redoInput = false; boolean userIsDone = false; while (true) { // get Memento from last loop Memento currentMemento = states.get(states.size() - 1) .saveMemento(); if (currentMemento == null) currentMemento = new Memento.Builder(0).build(); if (!redoInput) System.out.println(currentMemento.prompt); redoInput = false; // prepare Memento for next loop Memento nextMemento = null; STATES state = STATES.values()[states.size() - 1]; // get user input String selection = reader.nextLine(); switch (selection) { case "exit": reader.close(); return; // only escape case "quit": nextMemento = new Memento.Builder(first(), currentMemento, selection).build(); states.clear(); break; case "back": nextMemento = new Memento.Builder(previous(state), currentMemento, selection).build(); if (states.size() <= 1) { states.remove(0); } else { states.remove(states.size() - 1); states.remove(states.size() - 1); } break; case "1": nextMemento = new Memento.Builder(next(state), currentMemento, selection).build(); break; case "2": nextMemento = new Memento.Builder(next(state), currentMemento, selection).build(); break; case "3": nextMemento = new Memento.Builder(next(state), currentMemento, selection).build(); break; case "4": nextMemento = new Memento.Builder(next(state), currentMemento, selection).build(); break; default: if (state.equals(STATES.CATEGORY)) { String command = selection; System.out.println("Executing " + command + " command on: " + currentMemento.type + " " + currentMemento.environment); utility.executeCommand(currentMemento.nickname, command); userIsDone = true; states.clear(); nextMemento = new Memento.Builder(first(), currentMemento, selection).build(); } else if (state.equals(STATES.KEYWORD)) { nextMemento = new Memento.Builder(next(state), currentMemento, selection).build(); states.clear(); nextMemento = new Memento.Builder(first(), currentMemento, selection).build(); } else { redoInput = true; System.out.println("give it another try"); continue; } break; } if (userIsDone) { // start the recurring menu over from the beginning for (int i = 0; i < states.size(); i++) { if (i != 0) { states.remove(i); // remove all except first } } reader = new Scanner(System.in); this.state = new State(); userIsDone = false; } if (!redoInput) { this.state.restoreMemento(nextMemento); states.add(this.state); } } } }

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• Why is there no .NET Community Process?

  - by michielvoo

  I was doing some research into general topics of software engineering and I came across the Java Community Process website: The JCP is the mechanism for developing standard technical specifications for Java technology. Anyone can register for the site and participate in reviewing and providing feedback for the Java Specification Requests (JSRs), and anyone can sign up to become a JCP Member and then participate on the Expert Group of a JSR or even submit their own JSR Proposal. Seems like a good idea to me, and there are lots of very well written specifications and reference implementations on the JCP website. So why is there no .NET Community Process? Is that something that Microsoft could or should start? Maybe they could install it on Codeplex.net and hand over the keys to the community.

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• Community Upload & Download web site software?

  - by James Outer

  I'm looking for a script/some software that I can put on/as a website where users can upload files, which can then be downloaded by other users and people. Does anyone have any suggestions for any free software that can do that? Cheers!

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• USE case to Class Diagram - How do I?

  - by 01010011

  Hi, I would like your guidance on how to create classes and their relationships (generalization, association, aggregation and composition) accurately from my USE case diagram (please see below). I am trying to create this class diagram so I can use it to create a simple online PHP application that allows the user to register an account, login and logout, and store, search and retrieve data from a MySQL database. Are my classes correct? Or should I create more classes? And if so, what classes are missing? What relationships should I use when connecting the register, login, logout, search_database and add_to_database to the users? I'm new to design patterns and UML class diagrams but from my understanding, the association relationship relates one object with another object; the aggregation relationship is a special kind of association that allows "a part" to belong to more than one "whole" (e.g. a credit card and its PIN - the PIN class can also be used in a debit card class); and a composition relationship is a special form of aggregation that allows each part to belong to only one whole at a time. I feel like I have left out some classes or something because I just can't seem to find the relationships from my understanding of relationships. Any assistance will be really appreciated. Thanks in advance. USE CASE DIAGRAM CLASS DIAGRAM

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• Best of OTN - Week of August 17th

  - by CassandraClark-OTN

  Architect CommunityThe Top 3 most popular OTN ArchBeat video interviews of all time: Oracle Coherence Community on Java.net | Brian Oliver and Randy Stafford [October 24, 2013] Brian Oliver (Senior Principal Solutions Architect, Oracle Coherence) and Randy Stafford (Architect At-Large, Oracle Coherence Product Development) discuss the evolution of the Oracle Coherence Community on Java.net and how developers can actively participate in product development through Coherence Community open projects. Visit the Coherence Community at: https://java.net/projects/coherence. The Raspberry Pi Java Carputer and Other Wonders | Simon Ritter [February 13, 2014] Oracle lead Java evangelist Simon Ritter talks about his Raspberry Pi-based Java Carputer IoT project and other topics he presented at QCon London 2014. Hot Features in Oracle APEX 5.0 | Joel Kallman [May 14, 2014] Joel Kallman (Director, Software Development, Oracle) shares key points from his Great Lakes Oracle Conference 2014 session on new features in Oracle APEX 5.0. Friday Funny from OTN Architect Community Manager Bob Rhubart: Comedy legend Steve Martin entertains dogs in this 1976 clip from the Carol Burnette show. Database Community OTN Database Community Home Page - See all tech articles, downloads etc. related to Oracle Database for DBA's and Developers. Java Community JavaOne Blog - JRuby and JVM Languages at JavaOne!  In this video interview, Charles shared the JRuby features he presented at the JVM Language Summit. He'll be at JavaOne read the blog to see all the sessions. Java Source Blog - IoT: Wearables! Wearables are a subset of the Internet of Things that has gained a lot of attention. Learn More. I love Java FaceBook - Java Advanced Management Console demo - Watch as Jim Weaver, Java Technology Ambassador at Oracle, walks through a demonstration of the new Java Advanced Management Console (AMC) tool. Systems Community OTN Garage Blog - Why Wouldn't Root Be Able to Change a Zone's IP Address in Oracle Solaris 11? - Read and learn the answer. OTN Garage FaceBook - Securing Your Cloud-Based Data Center with Oracle Solaris 11 - Overview of the security precautions a sysadmin needs to take to secure data in a cloud infrastructure, and how to implement them with the security features in Oracle Solaris 11.

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• Separation of domain and ui layer in a composite

  - by hansmaad

  Hi all, i'm wondering if there is a pattern how to separate the domain logic of a class from the ui responsibilities of the objects in the domain layer. Example: // Domain classes interface MachinePart { CalculateX(in, out) // Where do we put these: // Draw(Screen) ?? // ShowProperties(View) ?? // ... } class Assembly : MachinePart { CalculateX(in, out) subParts } class Pipe : MachinePart { CalculateX(in, out) length, diamater... } There is an application that calculates the value X for machines assembled from many machine parts. The assembly is loaded from a file representation and is designed as a composite. Each concrete part class stores some data to implement the CalculateX(in,out) method to simulate behaviour of the whole assembly. The application runs well but without GUI. To increase the usability a GUi should be developed on top of the existing implementation (changes to the existing code are allowed). The GUI should show a schematic graphical representation of the assembly and provide part specific dialogs to edit several parameters. To achieve these goals the application needs new functionality for each machine part to draw a schematic representation on the screen, show a property dialog and other things not related to the domain of machine simulation. I can think of some different solutions to implement a Draw(Screen) functionality for each part but i am not happy with each of them. First i could add a Draw(Screen) method to the MachinePart interface but this would mix-up domain code with ui code and i had to add a lot of functionality to each machine part class what makes my domain model hard to read and hard to understand. Another "simple" solution is to make all parts visitable and implement ui code in visitors but Visitor does not belong to my favorite patterns. I could derive UI variants from each machine part class to add the UI implementation there but i had to check if each part class is suited for inheritance and had to be careful on changes to the base classes. My currently favorite design is to create a parallel composite hierarchy where each component stores data to define a machine part, has implementation for UI methods and a factory method which creates instances of the corresponding domain classes, so that i can "convert" a UI assembly to a domain assembly. But there are problems to go back from the created domain hierarchy to the UI hierarchy for showing calculation results in the drawing for example (imagine some parts store some values during the calculation i want to show in the schematic representation after the simluation). Maybe there are some proven patterns for such problems?

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• The New Social Developer Community: a Q&A

  - by Mike Stiles

  In our last blog, we introduced the opportunities that lie ahead for social developers as social applications reach across every aspect and function of the enterprise. Leading the upcoming JavaOne Social Developer Program October 2 at the San Francisco Hilton is Roland Smart, VP of Social Marketing at Oracle. I got to ask Roland a few of the questions an existing or budding social developer might want to know as social extends beyond interacting with friends and marketing and into the enterprise. Why is it smart for developers to specialize as social developers? What opportunities lie in the immediate future that’s making this a critical, in-demand position? Social has changed the way we interact with brands and with each other across the web. As we acclimate to a new social paradigm we also look to extend its benefits into new areas of our lives. The workplace is a logical next step, and we're starting to see social interactions more and more in this context. But unlocking the value of social interactions requires technical expertise and knowledge of developing social apps that tap into the social graph. Developers focused on integrating social experiences into enterprise applications must be familiar with popular social APIs and must understand how to build enterprise social graphs of their own. These developers are part of an emerging community of social developers and are key to socially enabling the enterprise. Facebook rebranded their Preferred Developer Consultant Group (PDC) and the Preferred Marketing Developers (PMD) to underscore the fact developers are required inside marketing organizations to unlock the full potential of their platform. While this trend is starting on the marketing side with marketing developers, this is just an extension of the social developer concept that will ultimately drive social across the enterprise. What are some of the various ways social will be making its way into every area of enterprise organizations? How will it be utilized and what kinds of applications are going to be needed to facilitate and maximize these changes? Check out Oracle’s vision for the social-enabled enterprise. It’s a high-level overview of how social will impact across the enterprise. For example: HR can leverage social in recruiting and retentionSales can leverage social as a prospecting toolMarketing can use social to gain market insightCustomer support can use social to leverage community support to improve customer satisfaction while reducing service costOperations can leverage social improve systems That’s only the beginning. Once sleeves get rolled up and social developers and innovators get to work, still more social functions will no doubt emerge. What makes Java one of, if not the most viable platform on which to build these new enterprise social applications? Java is certainly one of the best platforms on which to build social experiences because there’s such a large existing community of Java developers. This means you can affordably recruit talent, and it's possible to effectively solicit advice from the community through various means, including our new Social Developer Community. Beyond that, there are already some great proof points Java is the best platform for creating social experiences at scale. Consider LinkedIn and Twitter. Tell us more about the benefits of collaboration and more about what the Oracle Social Developer Community is. What opportunities does that offer up and what are some of the ways developers can actively participate in and benefit from that community? Much has been written about the overall benefits of collaborating with other developers. Those include an opportunity to introduce yourself to the community of social developers, foster a reputation, establish an expertise, contribute to the advancement of the space, get feedback, experiment with the latest concepts, and gain inspiration. In short, collaboration is a tool that must be applied properly within a framework to get the most value out of it. The OSDC is a place where social developers can congregate to discuss the opportunities/challenges of building social integrations into their applications. What “needs” will this community have? We don't know yet. But we wanted to create a forum where we can engage and understand what social developers are thinking about, excited about, struggling with, etc. The OSDL can then step in if we can help remove barriers and add value in a serious and committed way so Oracle can help drive practice development.

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• What should you do differently when designing websites for an embedded web server

  - by Roger Attrill

  When designing a website to be accessed from an embedded webserver such as KLone, what do you need to do differently compared to a 'standard' web server. I'm talking about considerations at the front end design stage, before the actual building and coding up. For example, typically in such situations, memory size is a premium, so I guess larger images are out, and maybe more attention should be focused on achieving a good look and feel using CSS/Javascript rather than bitmap images.

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• What is the greatest design flaw you have faced in any programming language?

  - by Anto

  All programming languages are having their design flaws simply because not a single language can be perfect, just as with most (all?) other things. That aside, which design fault in a programming language has annoyed you the most through your history as a programmer? Note that if a language is "bad" just because it isn't designed for a specific thing isn't a design flaw, but a feature of design, so don't list such annoyances of languages. If a language is illsuited for what it is designed for, that is of course a flaw in the design. Implementation specific things and under the hood things do not count either.

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• Development: SDK for Social Net

  - by loldop

  I have a task: development sdk for social networking service like facebook, twitter and etc. At now i'm developing facebook-extension-sdk which based on facebook-ios-sdk 3.0. But not all social networking services have good sdks. And all time i improved my facebook-extension-sdk, when i see ugly code :( Please, advise me good techniques to development these sdks (like design-patterns or your own experience or good books/sites). Thanks!

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• NetBeans PHP Community Council

  - by Tomas Mysik

  Hi all, today we would like to inform all of you that now you have a chance to improve NetBeans via NetBeans PHP Community Council. The author of this activity is Timur Poperecinii and he would like to tell you a few words about it. Hello passionate technical people, First of all let me introduce myself: my name is Timur, I’m a developer from Moldova (that little country between Romania and Ukraine), I develop mostly in .NET and JQuery, but I love to learn more, not being an expert I am familiar with Java (Struts2, Play), PHP (Symfony2), Ruby (Rails), Sencha Touch 2 and other technologies. I was “introduced” in PHP recently by a client of mine who requested to make the work specifically in PHP. Let me tell you a little story about my experience with open source and IDEs: when I was studying in university in 2007 I think, I did a simple little application in PHP and thought “Damn, if only there was a good IDE for PHP so I could relax and no having to remember all the function names”, then when I searched on internet pretty much everyone was using Vim or Emacs on Linux, but it had no autocomplete anyway, just syntax highlighting. I remember using some tool like Notepad++ I think. Nowadays everything changed, we have highlighting and autocomplete for about all standard things in PHP in many IDEs. I use NetBeans for PHP, and I really am happy with the experience I have there with standard PHP code, but for frameworks I still think there is lots of room for improvements. For example we have some Symfony 2 and Twig support. But I’d love to see more of that coming, for example I’m a big fan of file templates, where the main goal is to not waste time on writing over and over again something that can be generated, and it counts even more when you don’t have a lot of autocomplete. So what I thought, “Hey I know Java a little, and NetBeans has plugins, so may be it worth trying to do a file templates plugin”, and so I did, you can find details about my Unified Udevi Symfony2 Plugin for NetBeans 7.2 on my blog. It wasn’t hard, and it even was fun! Give back to open source Now think a little, NetBeans is an open source project and PHP support is just a part of it, so the resources are pretty limited in this area. But we as a community that uses this product, want to have the best possible experience with PHP and frameworks(!!!). So why don’t we GIVE BACK TO OPENSOURCE ? Imagine an IDE that can do all the things you wanted + it is free. Now how far is NetBeans from that point? I guess not so far – you might miss a little niche thing that you use on a daily basis, but then the question appears why don’t you make it happen on your own? NetBeans PHP Community Council What I proposed is to create a NetBeans PHP Community Council that will be formed of people willing to change something, willing to create plugins for their own needs and for the needs of the community, test the plugins created by them too, and basically evolve NetBeans in direction they want to reach. I already talked with the NetBeans PHP team. They are only happy to help this Council, with technical advises, opening some APIs we might need to have access to, and other things. One important thing to mention is that this Council is a Community project, so though we’ll have direct discussions with NetBeans PHP Dev team, NetBeans is not the leading force here, it is the community. You can see more details about the goals and structure I proposed at NetBeans PHP Community Council wiki page. We use this mail list: [email protected] for discussions and topics related to the Council. How can I join To join the NetBeans PHP Community Council please send an email to [email protected] with the subject of the mail starting with [Council New Member]. You can subscribe to this mail list here:http://netbeans.org/projects/php/lists. in your mail please indicate your location, age and experience both in Java and PHP. I need these data to assign you to a team. A response will be send to you with your next assignment and some people to contact. I really hope that you’ll make a step forward and try to make your everyday use of NetBeans even more fun.

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• How do I write code that doesn't suck? [closed]

  - by Afnan

  My friends and I would like to write a C# desktop application, and would like some guidance on how to make sure the code base is professional and well-kept. Should we use classes or interfaces for our inheritance patterns (which is better)? What are the best practices for professional applications? How do we know what sloppy code looks like, and how do we avoid creating sloppy code? Are there any best practices regarding the design of Winforms applications?

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• What is a useful pattern to maintaining an object state in a one to many relationship?

  - by ahenderson

  I am looking for a design for my application, here are the players(classes) involved. struct Transform { // Uses a matrix to transform the position. // Also acts acts as the state of a Dialog. Position transform(Position p); //other methods. }; struct Dialog { // There are multiple dialog for the user to transform the output. Transform& t; void ChangeTranformation(){t.rotate(360);} } struct Algorithm { //gives us a position based on an implementation. For example this can return points on a circle or line. Transform& t; Position m_p; Dialog& d; Position GetCurrentPosition(){ return t.transform(m_p);} //other methods. } Properties I need: Each algorithms has one dialog and each dialog can have many algorithms associated with it. When the user selects an algorithm a dialog associated with that algorithm is displayed. If the user selects a different algorithm then re-selects back the state is restored in the dialog. Basically I want a good design pattern to maintain the state of the dialog given that many algorithms use it and they can be switched back and forth. Does anyone have any suggestions? Here is a use case: Dialog1 has a single edit box to control the radius. Algorithm1 generates points on a unit circle. Algorithm2 is the same as Algorithm1. The user has selected Algorithm1 and entered 2 into the edit box. This will generate points on a circle of radius 2. The user then selects Algorithm2 and enters 10 into the edit box of Dialog1. This will generate points on a circle of radius 10. Finally Algorithm1 is selected again. The edit box of Dialog1 should show 2 and points on a circle of radius 2 should be generated.

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• How can you tell whether to use Composite Pattern or a Tree Structure, or a third implementation?

  - by Aske B.

  I have two client types, an "Observer"-type and a "Subject"-type. They're both associated with a hierarchy of groups. The Observer will receive (calendar) data from the groups it is associated with throughout the different hierarchies. This data is calculated by combining data from 'parent' groups of the group trying to collect data (each group can have only one parent). The Subject will be able to create the data (that the Observers will receive) in the groups they're associated with. When data is created in a group, all 'children' of the group will have the data as well, and they will be able to make their own version of a specific area of the data, but still linked to the original data created (in my specific implementation, the original data will contain time-period(s) and headline, while the subgroups specify the rest of the data for the receivers directly linked to their respective groups). However, when the Subject creates data, it has to check if all affected Observers have any data that conflicts with this, which means a huge recursive function, as far as I can understand. So I think this can be summed up to the fact that I need to be able to have a hierarchy that you can go up and down in, and some places be able to treat them as a whole (recursion, basically). Also, I'm not just aiming at a solution that works. I'm hoping to find a solution that is relatively easy to understand (architecture-wise at least) and also flexible enough to be able to easily receive additional functionality in the future. Is there a design pattern, or a good practice to go by, to solve this problem or similar hierarchy problems? EDIT: Here's the design I have: The "Phoenix"-class is named that way because I didn't think of an appropriate name yet. But besides this I need to be able to hide specific activities for specific observers, even though they are attached to them through the groups. A little Off-topic: Personally, I feel that I should be able to chop this problem down to smaller problems, but it escapes me how. I think it's because it involves multiple recursive functionalities that aren't associated with each other and different client types that needs to get information in different ways. I can't really wrap my head around it. If anyone can guide me in a direction of how to become better at encapsulating hierarchy problems, I'd be very glad to receive that as well.

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• Flags with deferred use

  - by Trenton Maki

  Let's say I have a system. In this system I have a number of operations I can do but all of these operations have to happen as a batch at a certain time, while calls to activate and deactivate these operations can come in at any time. To implement this, I could use flags like doOperation1 and doOperation2 but this seems like it would become difficult to maintain. Is there a design pattern, or something similar, that addresses this situation?

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• Associating an Object with other Objects and Properties of those Objects

  - by alzoid

  I am looking for some help with designing some functionality in my application. I already have something similar designed but this problem is a little different. Background: In my application we have different Modules. Data in each module can be associated to other modules. Each Module is represented by an Object in our application. Module 1 can be associated with Module 2 and Module 3. Currently I use a factory to provide the proper DAO for getting and saving this data. It looks something like this: class Module1Factory { public static Module1BridgeDAO createModule1BridgeDAO(int moduleid) { switch (moduleId) { case Module.Module2Id: return new Module1_Module2DAO(); case Module.Module3Id: return new Module1_Module3DAO(); default: return null; } } } Module1_Module2 and Module1_Module3 implement the same BridgeModule interface. In the database I have a Table for every module (Module1, Module2, Module3). I also have a bridge table for each module (they are many to many) Module1_Module2, Module1_Module3 etc. The DAO basically handles all code needed to manage the association and retrieve its own instance data for the calling module. Now when we add new modules that associate with Module1 we simply implement the ModuleBridge interface and provide the common functionality. New Development We are adding a new module that will have the ability to be associated with other Modules as well as specific properties of that module. The module is basically providing the user the ability to add their custom forms to our other modules. That way they can collect additional information along with what we provide. I want to start associating my Form module with other modules and their properties. Ie if Module1 has a property Category, I want to associate an instance From data with that property. There are many Forms. If a users creates an instance of Module2, they may always want to also have certain form(s) attached to that Module2 instance. If they create an instance of Module2 and select Category 1, then I may want additional Form(s) created. I prototyped something like this: Form FormLayout (contains the labels and gui controls) FormModule (associates a form with all instances of a module) Form Instance (create an instance of a form to be filled out) As I thought about it I was thinking about making a new FormModule table/class/dao for each Module and Property that I add. So I might have: FormModule1 FormModule1Property1 FormModule1Property2 FormModule1Property3 FormModule1Property4 FormModule2 FormModule3 FormModule3Property1 Then as I did previously, I would use a factory to get the proper DAO for dealing with all of these. I would hand it an array of ids representing different modules and properties and it would return all of the DAOs that I need to call getForms(). Which in turn would return all of the forms for that particular bridge. Some points This will be for a new module so I dont need to expand on the factory code I provided. I just wanted to show an example of what I have done in the past. The new module can be associated with: Other Modules (ie globally for any instance of that module data), Other module properties (ie only if the Module instance has a certian value in one of its properties) I want to make it easy for developers to add associations with other modules and properties easily Can any one suggest any design patterns or strategy's for achieving this? If anything is unclear please let me know. Thank you, Al

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• Save the date! Manageability Partner Community Forum at Oracle Openworld - Oct. 1st

  - by Javier Puerta

  The Exadata & Manageability Partner Communities will be celebrating a Community Forum in San Francisco during Oracle Openworld. The session will take place on Monday, October 1st, from 4:00 - 6:00 pm local time.If you would like to present an experience around a customer project or sales best practice in the Manageability or Quality & Testing areas, please contact [email protected] with a short description of your proposal.

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• New Gaming Community

  - by elasolova

  Hi, I want to start a gaming community both for developers and players. I decided to go for buddypress which is a wordpress plugin. I set up the site, but I do not know how to attract members. Do you have any suggestions? Note: I think the idea of gaming community is awesome as people can find other programmers to do projects via that website.

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