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  • What happens when several Java servlet apps running on the same port ?

    - by Frank
    Something strange happened to my servlets and I think I've figured out why, yet I'm more confused. I used Netbean6.7 to develop a Paypal IPN (Instant Payment Notification) message servlet, it listens on port 8080 by default for Paypal IPN messages. I used some sample Java code from it's web site, but when it ran, only about 1 in 10 messages came through, and they looked correct, but why 1 in 10 ? Not 100% or none ? So I asked some questions here and got some advices, one in particular points me to Google's App Engine, so I downloaded it and ran the demo guestbook while my IPN servlet is still running on Netbeans, the strange thing happened, after I entered "appengine-java-sdk-1.3.2\bin\dev_appserver.cmd appengine-java-sdk-1.3.2\demos\guestbook\war" from the command prompt, I went to the following url on my browser "http://localhost:8080/", I thought I would see the Google demo guestbook page, NO, what I saw was another servlet I developed 2 years ago : "Web Academy", online course registration app. How can that happen ? I never started it, and I haven't touch that project for years. I guess because it's also listening on port 8080, so now I understand why the IPN messages only came through 1 in 10 times, because another servlet was also listening on that port and could have got the messages intended for IPN, or some how those two servlets' processes mixed up and therefore couldn't respond to Paypal properly, and failed. In order to verify some of my guesses, I turn off Netbeans, and ran the Google guestbook again at the prompt, this time on my browser http://localhost:8080/ points to the demo guestbook page. My Urls look like this : [A] Paypal IPN : http://localhost:8080/PayPal_App/PayPal_Servlet [B] Web Academy : http://localhost:8080/ So now, my questions are : <1> Why the "Web Academy" servlet was auto started when I ran the Paypal servlet ? <2> If I change the IPN listening port to 8083, would that mean I can run both of them on my PC at the same time without affecting each other ? <3> But I still don't understand, [A] and [B] look different, if a page for [A] is refreshed, it should show the Paypal content, and another page looking at [B] should show the Web Academy content, and that's exactly what happens when I started Netbeans to run the Paypal servlet, both pages show their respective content correctly side by side without interfering with each other, how come the IPN messages couldn't get through 100% of the time ? <4> In Netbeans how to assign 8080 to servlet [A] and assign port 8083 to servlet [B] ? <5> How to turn off auto start of Web Academy by Netbeans ?

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  • Java 6 ScriptEngine and JSON.parse problem

    - by Tim
    The Rhino release that is included in Java 6 ScriptEngine does not have a JSON parser. I've tried including crockfords JSON2.js in my script on the scriptengine.eval(). When I try to do the JSON.parse, it ends up giving me a script error that .replace is an unknown function. .replace is referenced several places in JSON2, and it works fine inside a browser (IE7, IE8, FF3). Anyone see this and have a suggestion?

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  • SSL configuration

    - by kit
    I am trying to setup the ssl_requirement plugin. For my users controller I would like to require ssl for new and create. When I open users/new the browser redirects to https but I get an unable to connect error message. The application error log says : Filter chain halted as [:ensure_proper_protocol] rendered_or_redirected. I am not sure if I have configured the plugin incorrectly or if I made an error with the nginx configuration.

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  • How to efficiently show many Images? (iPhone programming)

    - by Thomas
    In my application I needed something like a particle system so I did the following: While the application initializes I load a UIImage laserImage = [UIImage imageNamed:@"laser.png"]; UIImage *laserImage is declared in the Interface of my Controller. Now every time I need a new particle this code makes one: // add new Laserimage UIImageView *newLaser = [[UIImageView alloc] initWithImage:laserImage]; [newLaser setTag:[model.lasers count]-9]; [newLaser setBounds:CGRectMake(0, 0, 17, 1)]; [newLaser setOpaque:YES]; [self.view addSubview:newLaser]; [newLaser release]; Please notice that the images are only 17px * 1px small and model.lasers is a internal array to do all the calculating seperated from graphical output. So in my main drawing loop I set all the UIImageView's positions to the calculated positions in my model.lasers array: for (int i = 0; i < [model.lasers count]; i++) { [[self.view viewWithTag:i+10] setCenter:[[model.lasers objectAtIndex:i] pos]]; } I incremented the tags by 10 because the default is 0 and I don't want to move all the views with the default tag. So the animation looks fine with about 10 - 20 images but really gets slow when working with about 60 images. So my question is: Is there any way to optimize this without starting over in OpenGl ES? Thank you very much and sorry for my english! Greetings from Germany, Thomas

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  • How to convert a HTMLElement to a string

    - by Turtle
    Hi, I am going to create an xml element in javascript to exchange data with server side. I found I can do it with document.createElement.But I do not know how to convert it to string. Is there any API in browser to make it easier? Or is there any js lib incudling this API? Thanks in advance.

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  • Multilingual Flash

    - by Will
    How do you make a Flash movie (using Haxe, or Actionscript code rather than the IDE) that supports multiple languages? Can you detect the browser's language? Are there utility classes for managing the strings and selecting the appropriate one based on language?

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  • IE8 is subtracting wrong in JavaScript / jQuery?

    - by Oscar Godson
    In every browser, Win/Mac, Chrome, Safari, Firefox, Opera, IE6, and IE7 they ALL get the following console output: 352 254 But in IE8 I get: 414 434 454 474 Here is my JS/jQuery code: $('#top-breadcrumbs').children('a').each(function(i){ if(!$(this).hasClass('permanent')){ if(permItemWidth+rmItemWidth > $('#top-breadcrumbs').width()){ $(this).addClass('removed'); rmItemWidth = rmItemWidth-$(this).width()+20; } } }); The log code i have above is writing the NEW rmItemWidth value after its been reset in that 2nd if

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  • Google analytics event tracking not working.

    - by Cato Johnston
    I have this code setup to track image downloads throught Google Analytics. <a href="/media/37768/CC20100117m001_thumb_2000.jpg" onclick="pageTracker._trackEvent('Image', 'Download', 'file.jpg');" class="hi-res track"> Hi-Res</a> But the events don't ever show up in the GA reports. I thought maybe the the browser was following the link before the javascript was being run but setting href="#" doesn't work either. Any ideas?

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  • SharePoint extensions for VS - which version have I got?

    - by Javaman59
    I'm using Visual Studio 2008, and have downloaded VSeWSS.exe 1.2, to enable Web Part development. I am new to SP development, and am already bewildered by the number of different versions of SP, and the VS add-ons. This particular problem has come up, which highlights my confusion. I selected Add - New Project - Visual C# - SharePoint- Web Part, accepted the defaults, and VS created a project, with the main file WebPart1.cs using System; using System.Runtime.InteropServices; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Serialization; using Microsoft.SharePoint; using Microsoft.SharePoint.WebControls; using Microsoft.SharePoint.WebPartPages; namespace WebPart1 { [Guid("9bd7e74c-280b-44d4-baa1-9271679657a0")] public class WebPart1 : System.Web.UI.WebControls.WebParts.WebPart { public WebPart1() { } protected override void CreateChildControls() // <-- This line { base.CreateChildControls(); // TODO: add custom rendering code here. // Label label = new Label(); // label.Text = "Hello World"; // this.Controls.Add(label); } } } The book I'm following, Essential SharePoint 2007, by Jeff Webb, has the following for the default project - using System; <...as previously> namespace WebPart1 { [Guid("9bd7e74c-280b-44d4-baa1-9271679657a0")] public class WebPart1 : System.Web.UI.WebControls.WebParts.WebPart { // ^ this is a new style (ASP.NET) web part! [author's comment] protected override void Render(HtmlTextWriter writer) // <-- This line { // This method draws the web part // TODO: add custom rendering code here. // Label label = new Label(); // writer.Write("Output HTML"); } } } The real reason for my concern is that in this chapter of the book the author frequently mentions the distinction between "old style" web parts, and "new style" web parts, as noted in his comment on the Render method. What's happened? Why has my default Web Part got a different signature to the authors?

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  • What is the purpose of the CreateSilverlight.js?

    - by mattruma
    I am trying to get out of browser support working for my Silverlight application and keep bumping into examples that reference CreateSilverlight.js. Looks like it has a variety of options to configure the the Silverlight experience for the end user. Is this a Microsoft javascript file for Silverlight? If so, where would I find it? I would have expected it to have already been added to my Silverlight project. Any help would be appreciated!

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  • Tomcat and proxy request

    - by Raghuram
    I configure a default tomcat installation (running on "localhost" at port "8080") as a proxy server in my browser and try to connect to http://www.google.com. I would expect either an error message saying tomcat is not configured as a proxy server or I should get the contents of google website. Instead I get the index.html page of my tomcat installation. What is going wrong?

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  • configuring kerberose-sso-negotiate in multiple domains

    - by and777
    hi all I have mycorp.com, ch1.mycorp.com, mycorp2.com domains (it is all windows) I am configuring sso-kerberose-negotiate authentication My server running in mainaaa3.mycorp2.com, I have created spn "http:/mainaaa3.mycorp2.com" for it, and I have set trusts between domains, but if users from mycorp.com, ch1.mycorp.com domains that browser do not send negotiate-ticket, and then I have created spn in each domains for "http:/mainaaa3.mycorp2.com", and now I have error: Mechanism level: Integrity check on decrypted field failed (31) what am I doing wrong?

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  • Reading the registry of a (windows computer) from a web app (silverlight? php? etc)

    - by Tommy
    Is there a way to read the windows registry from a web based application with no user interaction? im open to language suggestions, any language will work i just need to know how to pull a certain string from one particular registry key. EDIT: incase this wasnt clear, im operating inside of a web-browser, obviously.. its a web application, weather it be silverlight, java, php, or something else.

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  • How can JVM arguments be passed to apps started through java webstart in MacOS?

    - by siva
    We have a application which is triggered from browser. This application consumes around 800 mb of memory. This works perfectly when invoked from any browsers in windows OS. The same application when triggered from MacOS throws an out of memory exception which occurs when the application is short of memory. Is there any way to increase the memory allocated for apps running in mac os environment. Also please let me know how JVM arguments can be passed to apps started through java webstart in macOS.

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  • How to make an entity out of a join table without primary key

    - by tputkonen
    I'm trying to generate JPA entities out of an existing database having an "interesting" design. Database has a table called UserSet, which can have links to several other UserSets. There is a one to many relation between UserSets and LinkedUserSets. LinkedUserSets also has one to one relation to UserSets. I tried to generate a JPA Entity out of the database structure using Dali JPA Tools. The resulting entity Linkeduserset misses @Id or @EmbeddedId annotation and thus failes to compile. As the resulting entity contains only two @JoinColumns (which cannot be marked as @Id), I have not so far found a way around this issue. Database structure can not be modified in any way. Is there a way to overcome this somehow? Relevant pars of create table statements: CREATE TABLE `LinkedUserSets` ( `UsrSetID` INT(11) NOT NULL DEFAULT '0' , `ChildID` INT(11) NOT NULL DEFAULT '0' , CONSTRAINT `fk_LinkedUserSets_UserSet1` FOREIGN KEY (`UsrSetID` ) REFERENCES `UserSet` (`UsrSetID` )); CREATE TABLE `UserSet` ( `UsrSetID` INT(11) NOT NULL AUTO_INCREMENT , PRIMARY KEY (`UsrSetID`), CONSTRAINT `fk_UserSet_LinkedUserSets1` FOREIGN KEY (`UsrSetID` ) REFERENCES `LinkedUserSets` (`ChildID` )); Generated entities: @Entity @Table(name="linkedusersets") public class Linkeduserset { //bi-directional many-to-one association to Userset @ManyToOne @JoinColumn(name="UsrSetID") private Userset userset1; //bi-directional one-to-one association to Userset @OneToOne @JoinColumn(name="ChildID") private Userset userset2; } @Entity @Table(name="userset") public class Userset { private static final long serialVersionUID = 1L; @Id @Column(name="UsrSetID") private int jngSetID; //bi-directional many-to-one association to Linkeduserset @OneToMany(mappedBy="userset1") private Set<Linkeduserset> linkedusersets; //bi-directional one-to-one association to Linkeduserset @OneToOne(mappedBy="userset2") private Linkeduserset linkeduserset; } Error message: Entity "Linkeduserset" has no Id or EmbeddedId

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  • Get JS file via HTTPS from a HTTP page

    - by Mike
    Okay, so what are the ramifications of getting a JS file via an HTTPS call while on a HTTP page. I assume it would just be a little bit of extra overhead. Would there be any warnings about this call from any certain browser? Don't ask why. It's just hypothetical.

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