You can&#39;t &quot;chain&quot; profile activations ([maven reference][1]) but you can activate them both through the same property:

    &lt;activation&gt;
      &lt;property&gt;
        &lt;name&gt;profile.selenium&lt;/name&gt;
      &lt;/property&gt;
    &lt;/activation&gt;

And the run `mvn -Dprofile.selenium`

  [1]: http://maven.apache.org/guides/introduction/introduction-to-profiles.html

I have a controller in ASP.NET MVC that I&#39;ve restricted to the admin role:

    [Authorize(Roles = &quot;Admin&quot;)]
    public class TestController : Controller
    {
       ...

If a user who is not in the Admin role navigates to this controller they are greeted with a blank screen.

What I would like to do is redirect them to View that says &quot;you need to be in the Admin role to be able to access this resource.&quot;

One way of doing this that I&#39;ve thought of is to have a check in each action method on IsUserInRole() and if not in role then return this informational view. However, I&#39;d have to put that in each Action which breaks the DRY principal and is obviously cumbersome to maintain.


Redirecting unauthorized controller in ASP.NET MVC

In many applications, we have some progress bar for a file download, for a compression task, for a search, etc. We all often use progress bars to let users know something is happening. And if we know some details like just how much work has been done and how much is left to do, we can even give a time estimate, often by extrapolating from how much time it&#39;s taken to get to the current progress level.

[![compression ETA screenshot][1]][1]  
&lt;sub&gt;(source: [jameslao.com](http://jameslao.com/wp-content/uploads/2008/01/winrar-progress-bar.png))&lt;/sub&gt;  


But we&#39;ve also seen programs which this Time Left &quot;ETA&quot; display is just comically bad. It claims a file copy will be done in 20 seconds, then one second later it says it&#39;s going to take 4 days, then it flickers again to be 20 minutes.  It&#39;s not only unhelpful, it&#39;s confusing!
The reason the ETA varies so much is that the progress rate itself can vary and the programmer&#39;s math can be overly sensitive.


Apple sidesteps this by just avoiding any accurate prediction and just giving vague estimates! 
[![Apple&#39;s vague evasion][2]][2]  
&lt;sub&gt;(source: [autodesk.com][3])&lt;/sub&gt;  

That&#39;s annoying too, do I have time for a quick break, or is my task going to be done in 2 more seconds? If the prediction is too fuzzy, it&#39;s pointless to make any prediction at all.

**Easy but wrong methods**

As a first pass ETA computation, probably we all just make a function like if p is the fractional percentage that&#39;s done already, and t is the time it&#39;s taken so far, we output t*(1-p)/p as the estimate of how long it&#39;s going to take to finish.  This simple ratio works &quot;OK&quot; but it&#39;s also terrible especially at the end of computation. If your slow download speed keeps a copy slowly advancing happening overnight, and finally in the morning, something kicks in and the copy starts going at full speed at 100X faster, your ETA at 90% done may say &quot;1 hour&quot;, and 10 seconds later you&#39;re at 95% and the ETA will say &quot;30 minutes&quot; which is clearly an embarassingly poor guess.. in this case &quot;10 seconds&quot; is a much, much, much better estimate.

When this happens you may think to change the computation to use **recent** speed, not average speed, to estimate ETA. You take the average download rate or completion rate over the last 10 seconds, and use that rate to project how long completion will be. That performs quite well in the previous overnight-download-which-sped-up-at-the-end example, since it will give very good final completion estimates at the end.  But this still has big problems.. it causes your ETA to bounce wildly when your rate varies quickly over a short period of time, and you get the &quot;done in 20 seconds, done in 2 hours, done in 2 seconds, done in 30 minutes&quot; rapid display of programming shame.


**The actual question:**

What is the best way to compute an estimated time of completion of a task, given the time history of the computation?  I am not looking for links to GUI toolkits or Qt libraries.  I&#39;m asking about the **algorithm** to generate the most sane and accurate completion time estimates.

Have you had success with math formulas?  Some kind of averaging, maybe by using the mean of the rate over 10 seconds with the rate over 1 minute with the rate over 1 hour?  Some kind of artificial filtering like &quot;if my new estimate varies too much from the previous estimate, tone it down, don&#39;t let it bounce too much&quot;? Some kind of fancy history analysis where you integrate progress versus time advancement to find standard deviation of rate to give statistical error metrics on completion? 

What have you tried, and what works best?


  [1]: https://i.stack.imgur.com/QOIIx.png
  [2]: https://i.stack.imgur.com/Tu5Wf.png
 [3]: https://download.autodesk.com/esd/mudbox/help2009/images/MED/DaliSP1/English/Install_licensing/install_progress_MAC.png

Smart progress bar ETA computation

I have 2 maven2 profiles, selenium and jspc. Now for &quot;selenium&quot; id&#39;d like to have an implicit activation of &quot;jspc&quot;, so that I don&#39;t have to write mvn -Pselenium,jspc from the command line. Is this possible ?

Can I make one maven profile activate another?

<p>I have 2 maven2 profiles, selenium and jspc. Now for "selenium" id'd like to have an implicit activation of "jspc", so that I don't have to write mvn -Pselenium,jspc from the command line. Is this possible ?</p>


What are the scoping rules for variables in a jsp page with pages added to them using &lt;jsp:include&gt; tags?

My understanding is that an included page is essentially copied verbatim into the page, which would lead me to assume that if I&#39;ve declared a variable in a Parent JSP that it would be available in the child ones.

However Eclipse complains about this (understandably because I could feasibly include the pages in any page or use them as stand alone. And when I try to start the tomcat server it fails to start.

I basically want to get a couple of variables from the session in the parent page and use them in the child pages. This doesn&#39;t work.

So I&#39;ve struck ont he idea of getting them from the session in each of the child pages, however I was wondering if I could give them all the same variable names, or if I&#39;d have to pick different variable names for them in each page so they didn&#39;t clash.


Also what about imports if I import log4net in the parent jss do I also have to import it in the child ones?

Variables in jsp pages with &quot;included&quot; pages

Are there any decent BitTorrent libraries for Java?  I need to program a simple torrent client, but it would be great if I didn&#39;t have to write everything from scratch.

Java BitTorrent library

I am thinking of creating a debug tool for my Java application.

I am wondering if it is possible to get a stack trace, just like ``Exception.printStackTrace()`` but without actually throwing an exception?

My goal is to, in any given method, dump a stack to see who the method caller is.

Is there a way to dump a stack trace without throwing an exception in java?

I&#39;m trying to call a class (main method) from command line (Windows) with Java.  
The class imports other classes (other jars).

I always get &quot;class not found exception&quot; from a class that my main program imports.

Here&#39;s what I tried:

- Add a CLASSPATH env. var with the path where the referenced lib resides (not working)

- I tried with all these different parameters when calling &quot;`java -jar myjar.jar`&quot; from command line : &quot;`-classpath lib/`&quot;, &quot;`-classpath ./lib/`&quot;, &quot;`-classpath lib`&quot;, &quot;`-cp lib/*`&quot;, &quot;`-cp lib/\*`&quot;, &quot;`-classpath lib/referenced-class.jar`&quot;, &quot;`-classpath ./lib/referenced-class.jar`&quot; (lib is where the referenced jar resides)

- I tried packaging all the referenced jar inside my jar where my main class resides...

- And with all that, I also tried to specify the classes inside the Manifest file with:
`Class-path referenced-jar.jar` and I also tried `Class-path lib/referenced-jar.jar`

Java: how to import a jar file from command line

What is the exact difference between these two interfaces? Does [`Enumeration`](http://docs.oracle.com/javase/7/docs/api/java/util/Enumeration.html) have benefits over using [`Iterator`](http://docs.oracle.com/javase/7/docs/api/java/util/Iterator.html)?  If anyone could elaborate, a reference article would be appreciated.

Difference between Java Enumeration and Iterator

Are there any preexisting Maven plugins or commands to update the dependencies in the POM? 
Example: (if this was in my POM)

&lt;!-- language: xml --&gt;

    &lt;dependency&gt;
        &lt;groupId&gt;commons-lang&lt;/groupId&gt;
        &lt;artifactId&gt;commons-lang&lt;/artifactId&gt;
        &lt;version&gt;2.3&lt;/version&gt;
    &lt;/dependency&gt; 

Is there a command or plugin I can run to get it to update the dependency to: 

&lt;!-- language: xml --&gt;

    &lt;dependency&gt;
        &lt;groupId&gt;commons-lang&lt;/groupId&gt;
        &lt;artifactId&gt;commons-lang&lt;/artifactId&gt;
        &lt;version&gt;2.4&lt;/version&gt;
    &lt;/dependency&gt; 



Maven update dependencies in POM

Anyone know if it is possible to ignore all the instances of a particular directory in a file structure managed by git. 

I&#39;m looking to exclude all the &#39;target&#39; folders in a maven project with a number of submodules. I know I can explicitly exclude each of them in a top level .gitignore, but I&#39;d really like to be able to specify a pattern like \*\*/target/* there to have it automatically ignore the instance in sub directories?

Is this possible?

Git Ignores and Maven targets

I have a multi-modules project, like this one:

    main-project/
        module1/
        module2/
            sub-module1/
            sub-module2/
            sub-module3/
            ...
        module3/
        module4/
        ...

I need to define a set of properties (that are dependent of the environment on which I want to release my project) in Maven2.
I will not use `&lt;properties&gt;` as there is lots of properties...
Thus, I use the [Properties Maven2 plugin][1].

The properties files are located in the `main-project/` directory.
How can I set the correct directory in the main pom.xml, in order to specify to any children where to find the properties file?

    &lt;plugin&gt;
        &lt;groupId&gt;org.codehaus.mojo&lt;/groupId&gt;
        &lt;artifactId&gt;properties-maven-plugin&lt;/artifactId&gt;
        &lt;version&gt;1.0-alpha-1&lt;/version&gt;
        &lt;executions&gt;
            &lt;execution&gt;
                &lt;phase&gt;initialize&lt;/phase&gt;
                &lt;goals&gt;
                    &lt;goal&gt;read-project-properties&lt;/goal&gt;
                &lt;/goals&gt;
                &lt;configuration&gt;
                    &lt;files&gt;
                        &lt;file&gt;???/env_${env}.properties&lt;/file&gt;
                    &lt;/files&gt;
                &lt;/configuration&gt;
            &lt;/execution&gt;
        &lt;/executions&gt;
    &lt;/plugin&gt;

If I set only `&lt;file&gt;env_${env}.properties&lt;/file&gt;`, then when Maven2 compiles the first module, it will not find the `main-project/env_dev.properties` file. If I set `&lt;file&gt;../env_${env}.properties&lt;/file&gt;`, then an error will be raised at the parent level, or at any sub-module level...



  [1]: http://mojo.codehaus.org/properties-maven-plugin

Maven2 property that indicates the parent directory

When trying to start my JUnit-Test out of Eclipse, I get a &quot;ClassNotFoundException&quot;. When running &quot;mvn test&quot; from console - everything works fine. Also, there are no problems reported in Eclipse.

My project structure is the following:

 - parent project (pom-packaging)
  - Web project (war-packaging - my JUnit-test is in here)
  - Flex project
  - Configuration project


----------

edit: How can the class not be found? It&#39;s a simple HelloWorld-Application with no special libraries.

Here&#39;s my JUnit&#39;s run-configuration:
![alt text][1]


  [1]: http://www.walkner.biz/_temp/runconfig.png


----------

Testclass (but as I said; it doesn&#39;t work with a simple HelloWorld either...):

    import org.junit.After;
    import org.junit.Assert;
    import org.junit.Before;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import biz.prognoserechnung.domain.User;
    import biz.prognoserechnung.domain.UserRepository;
    import biz.prognoserechnung.domain.hibernate.UserHibernateDao;

    public class UserDaoTest {
    /**
     * the applicationcontext.
     */
    private ApplicationContext ctx = null;

    /**
     * the user itself.
     */
    private User record = null;

    /**
     * Interface for the user.
     */
    private UserRepository dao = null;

    @Before
    public void setUp() throws Exception {
	String[] paths = { &quot;WEB-INF/applicationContext.xml&quot; };
	ctx = new ClassPathXmlApplicationContext(paths);
	dao = (UserHibernateDao) ctx.getBean(&quot;userRepository&quot;);
    }

    @After
    public void tearDown() throws Exception {
	dao = null;
    }

    @Test
    public final void testIsUser() throws Exception {
	Assert.assertTrue(dao.isUser(&quot;John&quot;, &quot;Doe&quot;));
    }

    @Test
        public final void testIsNoUser() throws Exception {
    	Assert.assertFalse(dao.isUser(&quot;not&quot;, &quot;existing&quot;));
            Assert.assertFalse(dao.isUser(null, null));
            Assert.assertFalse(dao.isUser(&quot;&quot;, &quot;&quot;));
        }
    }



Eclipse - java.lang.ClassNotFoundException

I want to add the oracle jdbc driver to my project as dependency (runtime scope) - ojdbc14.
In MVNrepository site the dependency to put in the POM is:

&lt;!-- language: xml --&gt;

    &lt;dependency&gt;
        &lt;groupId&gt;com.oracle&lt;/groupId&gt;
        &lt;artifactId&gt;ojdbc14&lt;/artifactId&gt;
        &lt;version&gt;10.2.0.3.0&lt;/version&gt;
    &lt;/dependency&gt;

of course this does&#39;t work as it is not in the central repository used by maven.
2 questions:

1. How do I find a repository (if any) that contains this artifact?

2. How do I add it so that Maven will use it?

Content Type	Original Author	Original Content on Stackoverflow
Question	krosenvold	View Question on Stackoverflow
Solution 1 - Java	Robert Munteanu	View Answer on Stackoverflow

Can I make one maven profile activate another?

Java Problem Overview

Java Solutions

Solution 1 - Java

Smart progress bar ETA computation

Redirecting unauthorized controller in ASP.NET MVC

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