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  • how good is java's UUID.randomUUID?

    - by Alvin
    I know randomized UUID have very very very low probability for collision in theory, but I am wondering, in practice, how good is java 5's randonUUID in terms of not having collision? Does anybody have any experience to share?

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  • SAML Authentication Portal

    - by Alvin Jones
    I'd like to develop a portal similar to what a company like OneLogin (http://www.onelogin.com/) has: The user would login with their login credentials then have links to the web resources that their account is associated with. When they see their resources all they need to do is click on them and they'll be automatically login in (SAML authentication). Are there any open source projects out there that have started on this effort? It would be great if there was something that we could use as a base to build on top of with a friendly license (e.g. MIT). Thanks

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  • SDL Tridion Schema Field "List of Links" Options

    - by Alvin Reyes
    I'm looking to create an SDL Tridion schema with a list of repeatable links while avoiding multiple fields per link. Hyperlink In a rich text field I have the following options for creating a hyperlink:* Component Anchor http:// mailto: Other When content authors create one of these hyperlinks, they have the option to select linked (visible) text as well as title and target attributes that function like typical HTML hyperlinks. "Richtext" means a Text field with Height of the Text Area = at least 2 rows with Allow Rich Text Formatting selected. Single Schema Field Link When creating a single schema field, I see these options: External Link (author options will include http://, mailto, Other) Multimedia Link Component Link (which can allow Multimedia Values) Current Ideas The best out-of-the-box (OOTB) setups I've found for this "list of links" is either offering: a single 2-line RTF with instructions to create a hyperlink (of any type) in that field separate fields for each type as well as additional fields for display name, target, and title (where the fields are assembled through template code), authors fill in only one of the fields (component link or external) Question Is there a way in the schema form designer, by updating the schema source, or through code to offer the same (RTF) hyperlink drop-down options, but in a single field? I could be missing something, but recognize this scenario isn't supported OOTB.

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  • drupal form textfield #default_value not working

    - by alvin.ng
    I am working on a custom module with multi-page form on drupal 6. I found that #default_value is not working when my '#type' = 'textfield'. However, when '#type'='textarea', it displays correctly with the '#default_value' specified. Basically, I wrote a FormFactory to return different form definition ($form) based on the post parameter received. Initially, it returns the display of directories list, user then selects from radio buttos until a specific directory contains a xml file, it will become edit form. The edit form will have text fields display the data (#default_value) inside the xml file, however the type 'textarea' works here rather than 'textfield'. How can I make my '#default_value' work in this case? Below is the non-working field definition: $form['pageset']['newsTitle'] = array( '#type' => 'textfield', '#title' => 'News Title', '#default_value' => "{$element->newsTitle}", '#rows' => 1, '#required' => TRUE, ); Then I changed it to textarea as shown below to make it work: $form['pageset']['newsTitle'] = array( '#type' => 'textarea', '#title' => 'News Title', '#default_value' => "{$element->newsTitle}", '#rows' => 1, '#required' => TRUE, );

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  • Flash uploader that can handle >2GB files?

    - by Alvin SMith
    Is there an open source Flash uploader that can handle files larger than 2 GB? ASP.net implementations like SlickUpload are not an option, and SWFUpload (and others that I've seen) do not handle files larger than 2 GB. Nor is requiring the user to have Java installed to run applets. This would be for both IE and Firefox. I've seen a couple "large file transfer" sites that have a Flash uploader and claim to go past the 2GB limit (which is the limit for http uploads for most browsers) so I know it is technically possible.

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  • HTML5: Can't drag on-the-fly created <div> tag even though draggable='true' Do I need to "BLESS"

    - by Pete Alvin
    After creating a div on the fly with this markup: $('.circuit').prepend("<div class='component' draggable='true'>TRANSISTOR</div>"); It is NOT draggable itself :( Is jQuery prepend() the correct way to create "live" tags in the DOM? Do I need to somehow bless it a different way to make draggable=true really work? How to I wire it up so that on-the-fly divs can be draggable? AFTER NOTE: I added a static div and that is draggable. INTERESTING: I view both the static and dynamic using FireFox F12 Firebug and they are identical. But one is draggable and one is not!!!

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  • How to create new account using servlets

    - by Alvin
    I want to know how can I create new account using servlets in post method? I'm currently following MVC design pattern, and I want to know if I pass the required data to register new account from JSP page, then how can I get that data in post method? As request.getParameter() method returning me null. How can I know that post method is calling to create new account? How can I pass all the relevant user information from servlets to model class for registering data to the database table?

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  • awk can and perl cannot

    - by alvin
    somewhere i read about one specific feature present in awk which is absent in perl. failed in locating it again. would appreciate it, if anyone of you could remember. (yep, this might be a useless trivia.) but still curious.

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  • JQuery/JavaScript div tag "containment" approach/algorithm?

    - by Pete Alvin
    Background: I've created an online circuit design application where div tags are containers that contain smaller div containers and so forth. Question: For any particular div tag I need to quickly identify if it contains other div tags (that may in turn contain other div tags). I've searched JQuery and I don't see any built-in routine for this. Does anyone know of an algorithm that's quicker than O(n^2)? Seems like I have to walk the list of div tags in an outer loop (n) and have an inner loop (another n) to compare against all other div tags and do a "containment test" (position, width, height), building a list of contained div tags. That's n-squared. Then I have to build a list of all nested div tags by concatenating contained lists. So the total would be O(n^2)+n. There must be a better way?

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  • HTML5: dragover(), drop(): how get current x,y coordinates?

    - by Pete Alvin
    How does one determine the (x,y) coordinates while dragging "dragover" and after the drop ("drop") in HTML5 DnD? I found a webpage that describes x,y for dragover (look at e.offsetX and e.layerX to see if set for various browsers but for the life of me they ARE NOT set). What do you use for the drop(e) function to find out WHERE in the current drop target it was actually dropped? I'm writing an online circuit design app and my drop target is large. Do I need to drop down to mouse-level to find out x,y or does HTML5 provided a higher level abstraction?

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  • Difference between library and native library

    - by Alvin
    Could anyone tell me the difference between library and native library in terms of java? I found the word "native library" in the following line: Type 1 - drivers that implement the JDBC API as a mapping to another data access API, such as ODBC. Drivers of this type are generally dependent on a native library, which limits their portability. The JDBC-ODBC Bridge driver is an example of a Type 1 driver. which you can found here

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  • Plastic SCM vs. Mercurial? Need Source Control for Visual Studio 2005 on Windows 7

    - by Pete Alvin
    1) Has anyone used Plastic SCM? Is it reliable? 2) How does it compare with Mercurial? (It seems like this is a good candidate for DVCS on Windows. I tried Git and really didn't like it.) 3) I really like TortoiseSVN. I like a central model because of the piece of mind that if it's in the respository it's "safe" and tracked. Here is the question: Is the excitement over distributed version control (DVCS) worth the hype? My environment: Windows 7 Windows development (Dev. Studio 2005, SQL Server 2003); integration would be nice Two developers sharing same code push code to production servers almost daily

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  • JAXB, how to marshal without a namespace

    - by Alvin
    I have a fairly large repetitive XML to create using JAXB. Storing the whole object in the memory then do the marshaling takes too much memory. Essentially, my XML looks like this: <Store> <item /> <item /> <item /> ..... </Store> Currently my solution to the problem is to "hard code" the root tag to an output stream, and marshal each of the repetitive element one by one: aOutputStream.write("<?xml version="1.0"?>") aOutputStream.write("<Store>") foreach items as item aMarshaller.marshall(item, aOutputStream) end aOutputStream.write("</Store>") aOutputStream.close() Somehow the JAXB generate the XML like this <Store xmlns="http://stackoverflow.com"> <item xmlns="http://stackoverflow.com"/> <item xmlns="http://stackoverflow.com"/> <item xmlns="http://stackoverflow.com"/> ..... </Store> Although this is a valid XML, but it just look ugly, so I'm wonder is there any way to tell the marshaller not to put namespace for the item elements? Or is there better way to use JAXB to serialize to XML chunk by chunk?

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  • Is J2SE a framework?

    - by Alvin
    Hello, I want to know is this legitimate to say J2SE a framework? If J2SE is a framework, then why there is a collection framework? Isn't collection framework inside J2SE? Please help me!

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  • load balancing in Tomcat

    - by Alvin
    Hi All, I want to implement the load balancing in tomcat 6.0 so that we can create more than one instance of a tomcat and when any of the instance is down then other instance will run our application. so that our application will never be down even when the large number of concurrent request comes. But i have no idea to implement it. Please give your precious suggestions.

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  • Problem in getting response from server in jquery

    - by Alvin
    Hello, I'm using $.ajax(options) method to pass the request to server based on username and password, but whenever I try to print the response by XMLHttpRequest object when response gets successful, I'm getting an empty value. $(document).ready(function(){ $("#form").submit(function(){ $.ajax({url:"Chat.jsp",type:"POST",data:$("#form").serialize(),success:function(request) { alert(request.responseText); //This is displaying nothing },error:function(){document.write("YOU can't");}}); }); }); This is what I'm doing in my servlets code after executing query: try { String user = request.getParameter("j_username"); String password = request.getParameter("j_password"); if(user != null && password != null) { String query = "Select * from users where user_name="+"\'"+user+"\'"+"&& user_pass="+"\""+password+"\""; DBCheck db= new DBCheck(); boolean b = db.doExecuteQuery(con.createStatement(),query); response.setHeader("Cache-Control", "no-cache"); if(b) { response.getWriter().println("Username already exits"); } else { response.getWriter().println("Username doesn't exit"); } } } catch(SQLException ex) { ex.printStackTrace(); } } May I know the problem, and how can I fix it?

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  • iBatis how to solve a more complex N+1 problem

    - by Alvin
    I have a database that is similar to the following: create table Store(storeId) create table Staff(storeId_fk, staff_id, staffName) create table Item(storeId_fk, itme_id, itemName) The Store table is large. And I have create the following java bean public class Store { List<Staff> myStaff List<Item> myItem .... } public class Staff { ... } public class Item { ... } My question is how can I use iBatis's result map to EFFICIENTLY map from the tables to the java object? I tried: <resultMap id="storemap" class="my.example.Store"> <result property="myStaff" resultMap="staffMap"/> <result property="myItem" result="itemMap"/> </resultMap> (other maps omitted) But it's way too slow since the Store table is VERY VERY large. I tried to follow the example in Clinton's developer guide for the N+1 solution, but I cannot warp my mind around how to use the "groupBy" for an object with 2 list... Any help is appreciated!

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  • (Cocoa) Can I Subclass and Delegate at the same time?

    - by Alvin
    @interface ClassB <ClassADelegate> : ClassA id <ClassBDelegate> delegate; @end As the code says, ClassB subclasses from ClassA and handles the formation protocol of Class A. However, the variable "delegate" will be duplicated. (ClassA also has "delegate") In fact, it can be done without subclassing, but it seems the code is cumbersome, i.e., to use a variable/function of ClassA, I need to write [[ClassB classA] doSomething] instead of [classB doSomething], where doSomething: is a function of ClassA. Are there any tidy way for me to do that?

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  • Hibernate database connection configuration

    - by Alvin
    We have 2 different server environments using the same Hibernate configuration. One server has JNDI support for datasource, but the other does not. Currently the Hibernate configuration is configured to use JNDI, which is causing problem on the server that does not support JNDI. I have also tried to put the direct JDBC configuration together with JNDI configuration into the configuration file, but it looks like hibernate always favors JNDI over direct JDBC configuration if both exist. My question is, will it be the same if both JNDI and connection_provider configuration both exists? Will Hibernate still use JNDI over connection_provider? Or is there any way to change the precedence of the database connection property? I do not have access to the server all the time, so I thought I do ask the question before my window of the sever time. Thanks in advance.

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