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Java Spotlight Episode 88: HTML 5 and JavaFX 2 with Gerrit Grunwalt

- by Roger Brinkley

Interview with Gerrit Grundwalt on HTML 5 and JavaFX 2. Joining us this week on the Java All Star Developer Panel is Arun Gupta, Java EE Guy. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link: Java Spotlight Podcast in iTunes. Show Notes News Java FX 2.1.1 Documentation updated on the docs.oracle.com/javafx website. Lightview: JavaFX 2 real-time visualizer for Glassfish JavaFX Programmatic POJO Expression Bindings (Part 1 & 2) The Enterprise Side of JavaFX - Leverage the power of FX Markup Language to define the UI for enterprise applications Events June 26-28, Jazoon, Zurich, Switzerland Jun 27, Houston JUG July 5, Java Forum, Stuttgart, Germany Jul 13-14, IndicThreads, Delhi July 30-August 1, JVM Language Summit, Santa Clara Feature InterviewGerrit Grunwald is working as a software engineer at Canoo Engineering AG (Basel, Switzerland). He is responsible for visualizations of all kinds. His technical interests include Java desktop development and specifically the subareas - JavaFX, Java Swing and HTML5 controls.He's a decent frequent blogger (http://www.harmonic-code.org), founder and leader of the Java User Group in Muenster (Germany), where he's also living. He has been involved in the IT industry since 1996, when he began to study physics at the University of Applied Sciences Muenster (Germany). Mail Bag What’s Cool Tab Sweep

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wp_redirect acting weird. requires die() afterward?

- by Joseph Carrington

I am writing a wordpress plugin that redirects the user. for some reason, wp_redirect does not work as think it should, namely: it seems not to redirect the user at all, unless I put a die command in directly after. here is some code: switch($_GET['wp_favorites_tax']) { case 'post_tag': wp_redirect(add_query_arg('tag', $_GET['wp_favorites_term'], get_bloginfo('url'))); die(); break; case 'category': wp_redirect(add_query_arg('cat', $_GET['wp_favorites_term'], get_bloginfo('url'))); die(); break; default: wp_redirect(get_bloginfo('url')); die(); } It seems really strange to me that I should have to tell my script to die so that the redirect can work. I have also tried a basic header("Location: $location); to similar ends, ie: it still requires the die() in order to work. really perplexing me. Thanks.

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What is the ideal length of a method?

- by iPhoneDeveloper

In object-oriented programming, there is no exact rule on the maximum length of a method , but I still found these two qutes somewhat contradicting each other, so I would like to hear what you think. In Clean Code: A Handbook of Agile Software Craftsmanship, Robert Martin says: The first rule of functions is that they should be small. The second rule of functions is that they should be smaller than that. Functions should not be 100 lines long. Functions should hardly ever be 20 lines long. and he gives an example from Java code he sees from Kent Beck: Every function in his program was just two, or three, or four lines long. Each was transparently obvious. Each told a story. And each led you to the next in a compelling order. That’s how short your functions should be! This sounds great, but on the other hand, in Code Complete, Steve McConnell says something very different: The routine should be allowed to grow organically up to 100-200 lines, decades of evidence say that routines of such length no more error prone then shorter routines. And he gives a reference to a study that says routines 65 lines or long are cheaper to develop. So while there are diverging opinions about the matter, is there a functional best-practice towards determining the ideal length of a method for you?

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Using .htaccess to replace backslash in URL with forward-slash

- by DamienL

I realise that a backslash should never appear in a URL in a form other than a URL escape code, however in this case the URL's are being generated by a .NET application for generating flashbooks. I have contacted the developer of this application with a bug report. In the interim i would like to use .htaccess to rewrite the offending backslashes. This is how the URLs appear in fiddler debugging proxy. www.example.com/folder/folder/thumbs%5C1.jpg I am using Firefox and it looks as though Firefox is translating them into the URL encoded equivalent ( \ == %5C1 ). Interestingly IE translates the backslash into a forward-slash automatically (not adhering to standards but convenient in this case). Is there a way to use .htaccess to rewrite all \ to /?

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implicit parameter definition in class

- by coubeatczech

implicit val odkaz = head; def vypis(implicit odkaz:Prvek):String = { odkaz match{ case null => "" case e => e.cislo + " " + e.pocet + "\n" + vypis(e.dalsi) } } ... def main(args:Array[String]){ val q = new MyQueue() // insert some values println(q.vypis) } This method(vypis) is a member of an queue-class so I'll always want to implicity start the recursion from the start of the queue, when calling the method from outside. Is there a way how to write it, that the method from outside calling, there's no paramter, but in inside, there's a parameter - for recursion...? The compiler complains that the parameter is not defined when called from outside

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Drawing text to <canvas> with @font-face does not work at the first time

- by lemonedo

Hi all, First try the test case please: http://lemon-factory.net/test/font-face-and-canvas.html I'm not good at English, so I made the test case to be self-explanatory. On the first click to the DRAW button, it will not draw text, or will draw with an incorrect typeface instead of the specified "PressStart", according to your browser. After then it works as expected. At the first time the text does not appear correctly in all browsers I've tested (Firefox, Google Chrome, Safari, Opera). Is it the standard behavior or something? Thank you. PS: Following is the code of the test case <!DOCTYPE html> <html> <head> <meta http-equiv=Content-Type content="text/html;charset=utf-8"> <title>@font-face and canvas</title> <style> @font-face { font-family: 'PressStart'; src: url('http://lemon-factory.net/css/fonts/prstart.ttf'); } canvas, pre { border: 1px solid #666; } pre { float: left; margin: .5em; padding: .5em; } </style> </head> <body> <div> <canvas id=canvas width=250 height=250> Your browser does not support the CANVAS element. Try the latest Firefox, Google Chrome, Safari or Opera. </canvas> <button>DRAW</button> </div> <pre id=style></pre> <pre id=script></pre> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script> var canvas = document.getElementById('canvas') var ctx = canvas.getContext('2d') var x = 30 var y = 10 function draw() { ctx.font = '12px PressStart' ctx.fillStyle = '#000' ctx.fillText('Hello, world!', x, y += 20) ctx.fillRect(x - 20, y - 10, 10, 10) } $('button').click(draw) $('pre#style').text($('style').text()) $('pre#script').text($('script').text()) </script> </body> </html>

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Problem with Full text Searching

- by devendra

I am searching in resumes weather the word is exist or not i am using the below query Case1: select top(10) c_resume_text from sntbl_candidates where contains(c_resume_text,'"a/dm"') in the above example only it is not working properly .It showing resumes even though there is no text like that. In Messages i am getting the following message. Informational: The full-text search condition contained noise word(s). if i try with Case 2: select top(10) c_resume_text from sntbl_candidates where contains(c_resume_text,'"a/d') i am getting proper results in case 2 can any one suggest me what to do. Thanks

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Is READ UNCOMMITTED / NOLOCK safe in this situation?

- by Ben Challenor

I know that snapshot isolation would fix this problem, but I'm wondering if NOLOCK is safe in this specific case so that I can avoid the overhead. I have a table that looks something like this: drop table Data create table Data ( Id BIGINT NOT NULL, Date BIGINT NOT NULL, Value BIGINT, constraint Cx primary key (Date, Id) ) create nonclustered index Ix on Data (Id, Date) There are no updates to the table, ever. Deletes can occur but they should never contend with the SELECT because they affect the other, older end of the table. Inserts are regular and page splits to the (Id, Date) index are extremely common. I have a deadlock situation between a standard INSERT and a SELECT that looks like this: select top 1 Date, Value from Data where Id = @p0 order by Date desc because the INSERT acquires a lock on Cx (Date, Id; Value) and then Ix (Id, Date), but the SELECT acquires a lock on Ix (Id, Date) and then Cx (Date, Id; Value). This is because the SELECT first seeks on Ix and then joins to a seek on Cx. Swapping the clustered and non-clustered index would break this cycle, but it is not an acceptable solution because it would introduce cycles with other (more complex) SELECTs. If I add NOLOCK to the SELECT, can it go wrong in this case? Can it return: More than one row, even though I asked for TOP 1? No rows, even though one exists and has been committed? Worst of all, a row that doesn't satisfy the WHERE clause? I've done a lot of reading about this online, but the only reproductions of over- or under-count anomalies I've seen (one, two) involve a scan. This involves only seeks. Jeff Atwood has a post about using NOLOCK that generated a good discussion. I was particularly interested in a comment by Rick Townsend: Secondly, if you read dirty data, the risk you run is of reading the entirely wrong row. For example, if your select reads an index to find your row, then the update changes the location of the rows (e.g.: due to a page split or an update to the clustered index), when your select goes to read the actual data row, it's either no longer there, or a different row altogether! Is this possible with inserts only, and no updates? If so, then I guess even my seeks on an insert-only table could be dangerous. Update: I'm trying to figure out how snapshot isolation works. It seems to be row-based, where transactions read the table (with no shared lock!), find the row they are interested in, and then see if they need to get an old version of the row from the version store in tempdb. But in my case, no row will have more than one version, so the version store seems rather pointless. And if the row was found with no shared lock, how is it different to just using NOLOCK?

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Going on 15 months for me...

- by Ratman21

About 5 face to face interviews, 4 telephone ones and except for the two weeks Census Job. But, after 15 months looking for work, I am still with out a JOB. What is wrong here or with me? Let’s see, hard worker (check), self motivated to do well on a Job (Check), Certified CompTIA A+, Security+ and Network+ Technician (Check), 20 + years experience in “IT” (CHECK), in good health, in 20 years of work only 15 days off due to health issues (Check), 18 years experience as technical Help Desk support (Check), can still work better than younger personal (Check), Strong trouble shooting skills for software, computer hard ware and circuit issues (Check) and Multiple software languages (Hey I have done some programming) Check. Hmm I don’t see any problem with me (of course I could have missed something, please let me know if you see what I am missing). Now as to what have I been up to since I last blogged. The same things of course, Job hunting, job hunting and study. I have set up sim of my home LAN and will be adding a wireless print server to the sim and in real life, soon. I was able to pull up and copy the examples of Cisco router commands that I had on my old lap top, to my newer PC. Every time I used a new command while working the NOC on my last job. I would cut and past a copy of the command on the router (and what it did) I was working on. Along with notes on the problem and commands use for same router. I used these to make documentation for on how to handle these types of issues, for the other Operation Techs. My old notes are helping me in studying for the CCENT test. As to Love Dare, I think it will take more like 40 weeks, than the 40 days of the book. Yes I am making progress, slow but, it is progress. I will have more on that in my next blog.

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Make a function which returns the original list except the argument

- by Alex

I want make a function which takes a list of string and a string and returns NONE if there is no string in the string list, otherwise it returns SOME of the list of string which is the same as the original list of string except it doesn't contain the initial string (pattern): fun my_function (pattern, source_list) = case source_list of [] => NONE | [x] => if pattern = x then SOME [] else NONE | x::xs => if pattern = x then SOME (xs) else SOME (x) :: my_function (pattern, xs) (* this is wrong, what to do here?*) val a = my_function ("haha", ["12", "aaa", "bbb", "haha", "ccc", "ddd"]) (* should be SOME ["12", "aaa", "bbb", "ccc", "ddd"]*) val a2 = my_function ("haha2", ["123", "aaa", "bbb", "haha", "ccc"]) (*should be NONE*) val a3 = my_function ("haha3", ["haha3"]) (* should be SOME []*) I'm confused by the 3rd case: x::xs => .... What should do there? Note that I'd like not to use any sml library function.

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JavaScript Resource Management Design Pattern

- by Adam

As a web developer, a common problem I find myself tackling is waiting for something to load before doing something else. In particular, I often hide (using either display: none; or visibility: hidden; depending on the situation) elements while waiting for a background image or a CSS file to load. Consider this example from Last.FM. They overlay a semi-transparant PNG over each album art image so that it looks like it's inside a jewel-case. They let it load when it loads, so depending on your internet speed, you may see the art image by itself (without the overlay) temporarily. In this case, the album art looks fine without the jewel-case effect. But in similar situations, I have found that I don't want the user to see the site's design mangled as resources incrementally load. So, in rare cases I have hidden everything from the user until the whole kit and kaboodle has loaded. But this is often a pain to write out, and may force the user to wait for a pretty long time to see anything (besides "loading..." text). I can think of (and have used on occasion) some obvious solutions/compromises: Use some inline CSS so that as certain parts of the DOM load and render, they will immediately have the correct size/position/etc. Immediately render the navigation part of the site, so that if the user wanted to use the current page purely to get somewhere else, they don't have to wait for the rest to load. Load pixelated images first as placeholders for layout while lazy-loading higher quality images as replacements. Something quirky like using a cute animated gif to distract the user during a "loading..." phase. Show useful information as a reference while loading the full UI. (Something akin to Gmail Inbox Preview, etc.) (Sorry if my question was basically just asked and answered...) Despite all of these ideas, I still find myself hoping there are better ways of doing some of these things. So I guess what I'm looking for is some inspiration and/or any creative ways of dealing with this problem that you guys may have seen out in the wild.

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Looking for suggestions: becoming a hireable, young programmer [closed]

- by Dan

I am a 17 year old Java programmer that has filled the last year with learning all of the ins and outs of Java - Using Eclipse, and the help of a friend of the family (a Java programming architect for some company), I have learned everything from serializing objects, basic networking, generics, reflection, multi-threading, code optimization and efficiency & some concurrency safety - built my own proxy class, and nowadays, I answer questions on Project Euler. I am seeking some suggestions though on where I go next, or where I go from here to get a job in programming. I dedicate at least an hour every day to coding, sometimes literally, the entire day, and I really have come to love the process. I just started reading Effective Java (v2), and learning Scala (as I see often, possibly the Java replacement) I will be going to college for Computer Science next year - and taking AP computer science this year (however, I took a practice exam and got an 87, only need a 60to70 to pass, so no need to study for it too much) -- I was wondering if getting the SE 7 OCA and OCP would help me in trying to get a programming job. I looked around and most people have said online that an OCA/OCP are practically useless, but, at my age do they make me any more credible? More or less, what would you recommend to get a job in programming these days - or distinguish yourself from the crowd? I have enough time and dedication to learn another language, or anything really. Thank you very much.

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Why Wouldn't Root Be Able to Change a Zone's IP Address in Oracle Solaris 11?

- by rickramsey

You might assume that if you have root access to an Oracle Solaris zone, you'd be able to change the root's IP address. If so, you'd proceed along these lines ... First, you'd log in: root@global_zone:~# zlogin user-zone Then you'd remove the IP interface: root@user-zone:~# ipadm delete-ip vnic0 Next, you'd create a new IP interface: root@user-zone:~# ipadm create-ip vnic0 Then you'd assign the IP interface a new IP address (10.0.0.10): root@user-zone:~# ipadm create-addr -a local=10.0.0.10/24 vnic0/v4 ipadm: cannot create address: Permission denied Why would that happen? Here are some potential reasons: You're in the wrong zone Nobody bothered to tell you that you were fired last week. The sysadmin for the global zone (probably your ex-girlfriend) enabled link protection mode on the zone with this sweet little command: root@global_zone:~# dladm set-linkprop -p \ protection=mac-nospoof,restricted,ip-nospoof vnic0 How'd your ex-girlfriend learn to do that? By reading this article: Securing a Cloud-Based Data Center with Oracle Solaris 11 by Orgad Kimchi, Ron Larson, and Richard Friedman When you build a private cloud, you need to protect sensitive data not only while it's in storage, but also during transmission between servers and clients, and when it's being used by an application. When a project is completed, the cloud must securely delete sensitive data and make sure the original data is kept secure. These are just some of the many security precautions a sysadmin needs to take to secure data in a cloud infrastructure. Orgad, Ron, and Richard and explain the rest and show you how to employ the security features in Oracle Solaris 11 to protect your cloud infrastructure. Part 2 of a three-part article on cloud deployments that use the Oracle Solaris Remote Lab as a case study. About the Photograph That's the fence separating a small group of tourist cabins from a pasture in the small town of Tropic, Utah. Follow Rick on: Personal Blog | Personal Twitter | Oracle Forums Follow OTN Garage on: Web | Facebook | Twitter | YouTube

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Build an unbound form in Acess 2007

- by DoubleJ92

I have an access application that has a form that allows the user to enter case notes. The main field of this form is tied to a SQL Server varchar(MAX) field in the source table. Since the users switched to Access 2007, their program keeps crashing when they are on the case notes form. As a possible solution to this problem, I would like to try unbinding this form and re-building it as an unbound form. This form needs to be able to add and update records into my SQL Server database. It also needs to be able to browse between records. I guess I am at a loss as to where to start. Any suggestions/code snippets is appreciated.

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Display value of a django form field in a template?

- by Eran Kampf

I have a form with an email property. When using {{ form.email }} in case of some validation error, django still renders the previous value in the input tag's value attribute: <input type="text" id="id_email" maxlength="75" class="required" value="[email protected]" name="email"> I want to render the input tag myself (to add some javascript code and an error class in case of an error). For example this is my template instead of {{ form.email }}: <input type="text" autocomplete="on" id="id_email" name="email" class="email {% if form.email.errors %}error{% endif %}"> However this does not display the errorneous value ("[email protected]" in this example) to the user. How do I get the field's value in the template?

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How to close an oracle db connection from php on an apache server? I mean close instantly.

- by Valentin Jacquemin

Usually closing a connection is simply done by oci_clone($connection); or in a worse case when the php script ends the connection pass away. In my case however, I face a different behavior. If I access my application which uses PHP 5.2.8, Apache 2.2.11 and oci8 1.2.5, the connection is kept during several minutes. Actually it seems to: if I launch netstat -b I see that the process httpd.exe remains with the ESTABLISHED status on the database's URL during a while (a few minutes). Could someone enlighten me on that behavior? P.S. I do not use persistent connections.

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String Utility Library for Code Generation

- by Adam Barney

CodeSmith has a nice StringUtils class that can be used to change database object names to singular, plural, camel case, pascal case, etc... Very useful for creating data access layers in their code generation tool. I'm trying to port some CodeSmith templates to the T4 template files used by Visual Studio, and I'm trying to find a similar library to do these things. There must be one somewhere in T4, since that's what is used to produce the LINQ to SQL classes, and it does a nice job of pluralization / singularization. Does anyone know where this library exists, or if a free library with similar functionality exists somewhere? Thanks!

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Using LINQ-To-Entities to Generate Information

- by parminder

I am working on a website where a user can add tags to their posted books, much like is currently done for questions on Stack Overflow. Classes: Books { bookId, Title } Tags { Id Tag } BooksTags { Id BookId TagId } Here are few sample records. Books BookId Title 113421 A 113422 B Tags Id Tag 1 ASP 2 C# 3 CSS 4 VB 5 VB.NET 6 PHP 7 java 8 pascal BooksTags Id BookId TagId 1 113421 1 2 113421 2 3 113421 3 4 113421 4 5 113422 1 6 113422 4 7 113422 8 Questions I need to write something in LINQ to entity queries which gives me data according to the tags: Query: bookIds where tagid = 1 Returns: bookid: 113421, 113422 Query 2: tags 1 and 2 Returns: 113421 I need tags and their count to to show in related tags, so in first case my related tags class should have following result. RelatedTags Tag Count 2 1 3 1 4 2 8 1 Second Case: RelatedTags Tag Count 3 1 4 1 How do I do this in LINQ?

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Anyone up to creating a tomcat based alternative for GAE?

- by bach

Hi, If we had the possibility to run GAE app without any code change on our servlet engine that would be great because: in case that google changes their billing policy we can just jump to our own server or in case their current policy doesn't fit our app needs we can do stuff which is not allowed in the GAE, compromising a 1 JVM, 1 DB We don't actually need a distributed system but more of a realtime system with synchronize, true locking mechanisms, other servers/software installed on the server machine, socket interface etc... Such a package should include at least: TomCat (or equivalent) DataNucleus Access Platform (Task Queue service) Any idea if it's easy to get such a thing or if it's already exist somewhere? Thanks

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Hibernate can't load Custom SQL collection

- by Geln Yang

Hi, There is a table Item like, code,name 01,parent1 02,parent2 0101,child11 0102,child12 0201,child21 0202,child22 Create a java object and hbm xml to map the table.The Item.parent is a Item whose code is equal to the first two characters of its code : class Item{ String code; String name; Item parent; List<Item> children; .... setter/getter.... } <hibernate-mapping> <class name="Item" table="Item"> <id name="code" length="4" type="string"> <generator class="assigned" /> </id> <property name="name" column="name" length="50" not-null="true" /> <many-to-one name="parent" class="Item" not-found="ignore"> <formula> <![CDATA[ (select i.code,r.name from Item i where (case length(code) when 4 then i.code=SUBSTRING(code,1,2) else false end)) ]]> </formula> </many-to-one> <bag name="children"></bag> </class> </hibernate-mapping> I try to use formula to define the many-to-one relationship,but it doesn't work!Is there something wrong?Or is there other method? Thanks! ps,I use mysql database. add 2010/05/23 Pascal's answer is right,but the "false" value must be replaced with other expression,like "1=2".Because the "false" value would be considered to be a column of the table. select i.code from Item i where ( case length(code) when 4 then i.code=SUBSTRING(code,1,2) else 1=2 end) And I have another question about the children "bag" mapping.There isn't formula configuration option for "bag",but we can use "loader" to load a sql-query.I configure the "bag" as following.But it get a list whose size is 0.What's wrong with it? <class> ... ... <bag name="children"> <key /> <one-to-many class="Item"></one-to-many> <loader query-ref="getChildren"></loader> </bag> </class> <sql-query name="getChildren"> <load-collection alias="r" role="Item.children" /> <![CDATA[(select {r.*} from Item r join Item o where o.code=:code and ( case length(o.code) when 2 then (length(r.code)=4 and SUBSTRING(r.code,1,2)=o.code) else 1=2 end ))]]> </sql-query>

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How do I check the validity of the Canadian Social Insurance Number in C#?

- by user518307

I've been given the assignment to write an algorithm in C# that checks the validity of a Canadian Social Insurance Number (SIN). Here are the steps to validate a SIN. Given an example Number: 123 456 782 Remove the check digit (the last digit): 123456782 Extract the even digits (2,4,6,8th digith): 12345678 Double them: 2 4 6 8 | | | | v v v v 4 8 12 16 Add the digits together: 4+8+1+2+1+6 = 22 Add the Odd placed digits: 1+3+5+7 = 16 Total : 38 Validity Algorithm If the total is a multiple of 10, the check digit should be zero. Otherwise, Subtract the Total from the next highest multiple of 10 (40 in this case) The check digit for this SIN must be equal to the difference of the number and the totals from earlier (in this case, 40-38 = 2; check digit is 2, so the number is valid) I'm lost on how to actually implement this in C#, how do I do this?

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Thread vs ThreadPool - .Net 2.0

- by NLV

Hello I'm not able to understand the difference between Thread vs ThreadPool. Consider i've to manipulate 50,000 records using threads. In case of threads i need to either predefine no of threads or no of records per threads. Either of them has to be constant. In case of threadpool we dont need to set any of them theoretically. But practically we need to assign the number of records per thread, because the no of threads may grow extremely large if the input no of records is huge. Any insights on this?

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Dynamically add a new row as Add in UITableView in edit mode?

- by David.Chu.ca

I have a table view with 0 or n rows of data from datastore. I added a customized Edit button on the right of the view's navigation bar. By default, when the edit button is clicked, in the action event, I set the view as edit mode: [self.tableView setEditing:YES animated:YES]; I would like to add a row at the end of the table view with Add button as an accessory on the left when the table view is in edit mode. And the "Add" row will not be displayed when the view is not in edit mode. This is very similar to the case of iPhon'e Contacts application when a contact is in edit mode. I am not sure if I need to add a row dynamically, and how if so? An alternative way I guess is to add more row when tableView:numberOfRowsInSection: is called? If later is the case, I have to make it hidden when the view is not in edit mode and visible when the view is in edit.

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Software design of a browser-based strategic MMO game

- by Mehran

I wonder if there are any known tested software designs for Travian-like browser-based strategic MMO games? I mean how would they implement the server of such games or what is stored in database and what is stored in RAM? Is the state of the world stored in one piece or is it distributed among a number of storage? Does anyone know a resource to study the problems and solutions of creating such games? [UPDATE] Suggested in comments, I'm going to give an example how would I design such a project. Even though I'm not sure if I'm proposing the right one. Having stored the world state in a MongoDB, I would implement an event collection in which all the changes to the world will register. Changes that are meant to happen in the future will come with an action date set to the future and those that are to be carried out immediately will be set to now. Having this datastore as the central point of the system, players will issue their actions as events inserted in datastore. At the other end of the system, I'll have a constant-running software taking out events out of the datastore which are due to be carried out and not done yet. Executing an event means apply some update on the world's state and thus the datastore. As scalable as this design sounds, I'm not sure if it will be worth implementing. For one, it is pointless to cache the datastore as most of updates happen once without any follow ups. For instance if you have the growth of resources in your game, you'll be updating the whole world state periodically in which case, having incorporated a cache, you are keeping the whole world in RAM (which most likely is impossible). So can someone come up with a better design?

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Grails GORM on multiple Forms

- by Fabien Barbier

Usually I'm using One-to-many relationship by this way : class Subject { static hasMany = [ crfs : Crf ] String name ... } class Crf { String title String info ... } I can extend this relationship to others domains, Ex : static hasMany = [ crfs : Crf, crfb : CrfBlood ...] But in my case I have to link the Subject domain to 30 others domains, maybe more...(ex : CrfBlood, CrfMedical, crfFamily, etc...). What domain model implementation should I use in my case ? I would like to keep the dynamic finders usability in my project.

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