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  • Removing associated entity JPA

    - by Marcel
    Hi I have a question regarding JPA persistence in Glassfish. Situation: I have a Supplier class that has a 1:n bidirectional relation to SupplierAddress. I would like to have the following behaviour: If I remove the SupplierAddress object from the List in the Supplier object and update it via the merge(supplierobject), the SupplierAddress tupel/object should be deleted. Is there an annotation do configure it like this or do I have to delete it manually. Any help would be very appreciated. Greetings Marcel

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  • Can you configure Spring-Security programmatically?

    - by jschoen
    I am working to configure Spring-Security with an existing application, for just basic security (i.e. what pages a user can see based on their roles). The question came up wondering if we could set what roles are required for each page in java instead of the ApplicationContext.xml. The idea is to store them in a table in our database, so we can easily change them with out a redeployment. Is this possible? How?

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  • enCapsa -what is it and what is used for?

    - by agnieszka
    It may not be a pure programming question but I'm looking for information about enCapsa. Do you know what it is, have you ever used it? I'm reading some papers about it but I can't really see how it works and what it can be used for in an IT company (and this is what i am supposed to find out).

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  • Get Attribute value in ViewEngine ASP.NET MVC 3

    - by Kushan Fernando
    I'm writting my own view engine. public class MyViewEngine : RazorViewEngine { public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache) { // Here, how do I get attributes defined on top of the Action ? } } ASP.NET MVC Custom Attributes within Custom View Engine Above SO Question has how to get attributes defined on top of the Controller. But I need to get attributes defined on Action.

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  • Docking *inside* an editor

    - by Andy Thomas-Cramer
    I have a document type which has multiple presentations. Say I want to display the document in an RCP editor with a customizable subset of those presentations, in a layout chosen by the user. One option that has come up is docking-like behavior for the panels inside an individual editor, with drag-and-drop, resizing, closing, maybe rollover and floating. Clearly this would need usability testing, but my question here is of feasibility. Are there any existing libraries or e4 plans to support behavior like this?

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  • Date arithmetic using integer values

    - by Dave Jarvis
    Problem String concatenation is slowing down a query: date(extract(YEAR FROM m.taken)||'-1-1') d1, date(extract(YEAR FROM m.taken)||'-1-31') d2 This is realized in code as part of a string, which follows (where the p_ variables are integers): date(extract(YEAR FROM m.taken)||''-'||p_month1||'-'||p_day1||''') d1, date(extract(YEAR FROM m.taken)||''-'||p_month2||'-'||p_day2||''') d2 This part of the query runs in 3.2 seconds with the dates, and 1.5 seconds without, leading me to believe there is ample room for improvement. Question What is a better way to create the date (presumably without concatenation)? Many thanks!

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  • Stop Master page refreshing while navigating between pages?

    - by Wael Dalloul
    I'm using Master Page in my ASP.net application, in the master page I put a ContentPlaceHolder in Update Panel to support AJAX in child pages, the question is how to stop Refreshing "master page controls" while navigating between pages? For navigation between pages I tried to use Response.Redirect, windows.location java script with no success, shall I use the Frames or IFrames instead of Master Pages to stop Refreshing? any suggestion to solve this issue will be highly appreciated, Thanks in advance...

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  • Advantages/disadvantages of Glassfish v3 Prelude vs Springsource dm server for Web applications?

    - by cletus
    Both of these appservers are at least in part OSGI based. One (Glassfish) is obviously J2EE while the other isn't. Now I'm at the stage of choosing a platform for a new project and the natural choice is Glassfish v3 Prelude. This does raise the issue of perhaps we should be using S2AP instead. The question then is this: does the springsource dm server offer any compelling reason to use it over Glassfish? And vice versa.

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  • Emulating Amazon SQS during development

    - by pyo
    I'm quite interested in beginning some development using Amazon SQS, perhaps SimpleDB too, my question is this, are there any open source solutions that mimic the functionality, just for the purposes of development. I've already encountered the Eucalyptus project (http://open.eucalyptus.com) for creating an EC-esque cloud. I've not had any success with google, I suspect it's because the cost of entry is so inexpensive, but still, does anyone know of anything like this?

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  • eclipse: Dynamic web project: linked WebContent folder?

    - by jeff porter
    Hello all, I'm trying to change a java project into a Dynamic web project, unfortunatly the project looks nothing like what it needs to easily move to a Dynamic web project. So, my question is... Change I change the "WebContent" directory to a linked folder? So that I can change the "WebContent" folder from C:\tools\eclipse_galiloe\workspace\Test\WebContent to C:\project\jsps Thanks!

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  • Refcounted pointers on iPhone

    - by anon
    1) Refcounted pointers need stack variables to have constructors / destructors called at predictable places. 2) Objective-C, afaik, does not support the above. 3) The cocoa libraries are bound in Objective-C, not C++. Thus, my question: is there a easy way to use the Cocoa libraries, yet still have most of my app in C++ (and thus use my refcounted pointers)? Thanks! (iPhone in the title since this is mainly targeted at the iPhone)

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  • How to bundle a native library and a JNI library inside a JAR?

    - by Alex B
    The library in question is Tokyo Cabinet. I want is to have the native library, JNI library, and all Java API classes in one JAR file to avoid redistribution headaches. There seems to be an attempt at this at GitHub, but It does not include the actual native library, only JNI library. It doesn't work (for me): when I use this JAR, the JVM does not even seem to find the JNI library which is packaged inside the JAR: java.lang.UnsatisfiedLinkError: no jtokyocabinet in java.library.path (tokyo_cabinet.clj:19)

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  • Creating a music catalog in C# and extracting first 30 seconds as soon as the first words are sung

    - by Rad
    I already read a question: Separation of singing voice from music. I don’t need this complex audio processing. I only need some detection mechanism that would detect that there is some voice/vocal playing while the music is playing (or not playing) I need to extract first 30 seconds when a vocalist starts singing along with full band music. See question 2 below. I want to create a music catalog using ASP.NET MVC 2 and Silverlight clients and C#.NET 4.0 programming language that would be front store. On the backend I would also like to create a desktop WPF/Windows application to create the music catalog from already existing music files, most of which have metadata in them ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, Vorbis Comments and APE Tags etc. I would possibly like to create a web service that would allow catalog contributors to upload a zipped album and trigger metadata extraction of music data and extraction of music segments as described below. I would be happy if I achieve no. 1 below. Let's say I have 1000ths of songs in mp3 (or other formats) grouped in subfolders using some classification (Genre, Artists, Albums, Composers or other groupings). I want to create tables in DB that would organize songs so they can be searched based on different criteria (year, length, above classification or by song title, description etc) like what iTune store allows to their customers. I want to extract metadata from various formats (I will try to get songs in mp3 format, but there may be other popular formats) and allow music Catalog manager person to add missing data from either desktop or web applications. He or other contributors can upload zipped music via an HTML or Silverlight upload or WPF. Can anybody suggest open source libraries, articles, code snippets that can do that in an automatic way using .NET and possibly SQL Server DB? My main questions are these. This is an audio processing challenge. I want to extract 2 segments of music (questions 1 and 2): 1. How to extract a music segment: 1-2 seconds before a vocal starts singing and up to 30 seconds from that point in time and 2. Much more challenging is to find repeating segments (One would usually find or recognize the names of the songs and songs are usually known by these refrains. How would I go about creating a list of songs that go great together like what Genius from iTune does? Is there any characteristics of music that can be used to match songs? The goal is for people quickly scan and recognize songs i.e. associate melody, words with a title/album so they can make intelligent decisions like buying a song, create similar mood songs. Thanks, Rad

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  • why aren't interfaces [Serializable]?

    - by Zac Harlan
    I would think that adding that attribute to an interface would be helpful make sure you don't create classes that use the interface and forget to make them serializable. This could be a very fundamental question but wanted to ask the experts. Thanks in advance. Zac

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  • jquery timer plugin

    - by Hulk
    the link specified below is a jquery timer plugin. http://keith-wood.name/countdown.html Also i use the following to start a timer $('#timer').countdown({until: 12,compact: true, description: ' to Go'}); My question is how do i deduce that the timer has reached 00:00:00 or the time given has elapsed Thanks..

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