What are the recommended steps for creating scalable web/enterprise applications in Java and .NET? I'm more interested in what it takes to go from a low volume app to a high volume one (assuming no major faults in the original architecture). For example, what are the options in each platform for clustering, load-balancing, session manage...
I'm trying to use JNA with a DLL in Windows, so far I was able to successfully call a function called c_aa_find_devices(). But all the functions start with c_aa and I would like to rename it to find_devices(). From what I gather the way to do this is with StdCallFunctionMapper but I can't find the documentation of how to use it in an ex...
I have a Hibernate entity, with a getter that is mapped as a @OneToMany: @Entity class Parent extends BaseParent { @OneToMany(cascade = {CascadeType.ALL}, mappedBy = "parent") public List<Child> getChildren() { return super.children; } public void setChildren(List<Child> list) { super.children = list; ...
Has anyone tried to interact with a Microsoft Geneva Server from Java? Can it be done easily, using some combination of generally available libraries? If so: What are the important Java libraries/frameworks to look into? ...
Hello, I have an instance of the following object in the jsp page context: Class User{ private boolean isAdmin; public boolean isAdmin(){return isAdmin} } How can I query the isAdmin property from the EL? This doesn't seem to work: ${user.admin} nor does this: ${user.isAdmin} thanks! -Morgan ...
Is it possible to specify which X display the JVM is to launch it's windows on through the JVM? I am thinking something like this java -DISPLAY=THE_DISPLAY_I_WANT:0.1 -jar my.jar I looked at the man pages and I can't find anything. or do I need to wrap my call to the jvm in a shell script like this #/bin/sh export DISPLAY=THE_DISPL...
Hi, I'm implementing a REST API for my Java server. One of the of the resources obtained through the API is actually creating a C++ DCOM object and reflecting its values. The Java to COM bridge I'm using is J-Integra. The problem is that I need to keep that DCOM object alive for subsequent REST calls, but the object is alive just as lo...
Whenever I click a JSlider it gets positioned one majorTick in the direction of the click instead of jumping to the spot I actually click. (If slider is at point 47 and I click 5 it'll jump to 37 instead of 5). Is there any way to change this while using JSliders, or do I have to use another datastructure? ...
I want to issue MDX against a MSAS cube from a Java client. What connectivity approaches have proven to be reliable for this? ...
I'm making this a community wiki in order to better understand the semantic differences between these errors and their runtime or compiled consequences. Also, I've coded on Java far too long and I want to learn pointers better in C++ -- so I need other people to do it. Edit2: I am refactoring this question. The distinction I am trying...
Hello, I'm programming a java application that reads strictly text files (.txt). These files can contain upwards of 120,000 words. The application needs to store all +120,000 words. It needs to name them word_1, word_2, etc. And it also needs to access these words to perform various methods on them. The methods all have to do with S...
I'm using Java SE 1.6 on Mac OS X 10.5.6. The code for my applet is as follows: import java.awt.Graphics; import javax.swing.JApplet; public class HelloWorld extends JApplet { public void paint( Graphics g ) { super.paint( g ); g.drawString( "Hello World!", 25, 25 ); } } I compiled this to a .class ...
I wrote a couple of Java classesSingleThreadedCompute and MultithreadedComputeto demonstrate the fact (or what I always thought was a fact!) that if you parallelize a compute-centric (no I/O) task on a single core machine, you don't get a speedup. Indeed my understanding is that parallelizing such tasks actually slows things down because...
I'm configuring the logging for a Java application. What I'm aiming for is two logs: one for all messages and one for just messages above a certain level. The app uses the java.util.logging.* classes: I'm using it as is, so I'm limited to configuration through a logging.properties file. I don't see a way to configure two FileHandlers d...
For a starting project, why would you use Metro instead of Axis2? What should be considred? Performace? Easiness? Tools/IDE/Plugins availability? ...
Is null is a keyword in Java? ...
Hi to all, I have created a java mail program to send mails. It was working fine yesterday.. All the mails were received in inbox folder but today mails are not received in inbox and all the mails are storing in junk box folder. Can anyone know why it happens? and what should i do to receive it in inbox? ...
I'm writing a Swing application, and further to my previous question, have settled on using the Model-View-Presenter pattern to separate the user interface from the business logic. When my application starts up, it executes the following code: Model model = new BasicModel(); Presenter presenter = new Presenter(model); View view = new S...
In c# if you want a method to have an indeterminate number of parameters you can make the final parameter in the method signature a "params" which to the method looks like an array but allows anyone using the method to put in as many parameters of that type as the want. I'm fairly sure java supports similar behaviour, but I cant find ou...
An Enum in Java implements the Comparable interface. It would have been nice to override Comparable's compareTo method, but here it's marked as final. The default natural order on Enum's compareTo is the listed order. Does anyone know why a Java Enum has this restriction? ...