When working on Maven web projects with Eclipse, m2e and m2e-wtp, Webapps can sometimes suddenly stop working, raising ClassNotFoundExceptions on every startup.
This is because the webapp lib folder is no longer published to the server. Cleaning, Publishing, Closing/opening project, restarting Eclipse, nothing restore this folder and its content. Additionally, a new warning appears in the problem view :
Classpath entry org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER will not be exported or published
To solve this issue, just open .classpath at the root of the project and add the following attribute to the maven classpath :
Just relaying a ‘thank-you’ post from Stavros Kounis on the nebula newsgroup :
Hi all
Its was back to 2008 when we have decide to rely on nebula gallery widget for our project named “PosterGenius”[1][2].
Since then Nebula Gallery widget[3] was havy used in our application. Now PosterGenius is a finalist for the Best RCP Application for the 2010 Eclipse Community Awards.
I what to share this “recognition” of our work with the Nebula Team[4] and say a BIG “Thank you guys!!”
The CollabNet team has made a fantastic work with the new merge client in Subclipse 1.6.x. I was used to the previous merge dialog and I was surprised how merging with SVN can be easy with a good wizard.
Let’s take a look at these screenshots :
Select merge operation
Select branch to reintegrate
Pre-merge checks
No screenshot here but if there is something wrong in the current working copy, the wizard warns you and provides quick fixes.
Merge options
Results
Merge graph
The branch and merge history can be shown in the history graph. We can see the previous merge on this test project.
ShareMedia is a multi-platform photo manager. It supports several repositories such as local computer, Jabber, Picasa web or Flickr.
RIM is a free OpenSource client application for the management of information with a connection to multitude of data repositories like Flickr, Youtube or Facebook and a desktop-integration for an optimal usage for the offline management, visualization and easy accessibility of information to the user.
A few weeks ago, Tom Seidel and I decided to work on Eclipse bundles that will be shared between the two projects in order to speed up development and improve reusability of our code.
Our first goal is to define a common API which will be used by both applications and to port the existing image viewers from ShareMedia to this new API. ShareMedia has two full screen viewers including an OpenGL based one, inspired from CoverFlow from iTunes (see screencast bellow @0:55).
While these bundles are mainly targeted to ShareMedia and RIM, they can also be used in the Eclipse IDE and in any RCP application.
We now have a first implementation of the viewer API and two basic viewers. A few features are still missing and there is no background image loading so the IU may freeze a few seconds while loading large images, but it is working.
The following explains how to install the viewers in Eclipse and in an RCP application.
Installing the demo viewer into Eclipse :
The viewer has a dependency on Nebula Gallery which is not yet packaged into the feature. So you have to install the gallery widget from its update site :
then install the demo viewer from ShareMedia / RIM update site :
http://smedia-rim.sourceforge.net/update/site.xml
Testing the viewer :
Select one or several image files in the package viewer / navigator view, open the context menu and select View in full screen…
Your monitors will fade to black and the first file will be displayed on your primary monitor. Commands are : ESC – Return to Eclipse , SPACE – Next image.
Multi-monitor setups are supported. Your secondary monitor will let you select the image to display on the primary monitor using a gallery of all items from your selection.
How to add a viewer to your application :
First, you will have to add the following bundles to your application
org.sharemediarim.api : the base API plugin, always required
org.sharemediarim.simple : the basic viewers. These are the only viewers available right now, just wait
org.sharemediarim.viewers.adapter.file : the adapter for IFile objects. Only if you want do show eclipse resources (IFile) in the viewer.
org.apache.sanselan : dependency of o.s.v.adapter.file, used to read image thumbnails.
org.sharemedia.rim.viewers : Eclipse integration. Adds full screen action for IFile items in the context menu.
If you didn’t use the Eclipse integration, you can open the viewer from your code (usually in an action) :
1 – Create a viewer : a viewer can display images, but not necessary in full screen. It can also be hosted in a view :
IViewer viewer= new SampleViewer();
2 – Create a full screen viewer from the previous viewer. You can also provide additional viewers which will be displayed on secondary monitors.
final GenericFullScreenViewer fullScreenViewer = new GenericFullScreenViewer(new SampleViewer());
3 – Set the viewer’s input. Objects within the selection must implement IAdaptable and have an adapter to Image or IAdvancedImage. We provide a default Adapter for IFile in org.sharemediarim.viewers.adapter.file.
fullScreenViewer.setInput(structuredSelection);
4 – Register a listener to dispose the viewer on close. You can also reuse the viewer every time, and dispose it only on exit.
fullScreenViewer.addCloseListener(new Listener() {
public void handleEvent(Event event) {
viewer.dispose();
}});
5 – Finally, open the viewer :
fullScreenViewer.open();
Get involved :
If you are interested by using these viewers in your application or by creating new implementations, don’t hesitate to get in touch with us and help improve this API and viewers.
The best solution would be to have a standard API for notification with support for notification plug ins (including growl) and this is exactly what is discussed on bug 209911 and on the wiki page for Platform UI/Notifications.
But for those wanting to add Growl support to their applications as soon as possible, I’ve just attached to bug 209911 a plug-in which can successfully send Growl notifications.
Growl Action
Growl Notification from Eclipse
The Growl wrapper depends on Apple’s Java/cocoa bindings, so the trick was to add external libraries to the plugin classpath :
This does not work with Cocoa/x86_64, probably because of the deprecation. There you get the following error :java.lang.UnsatisfiedLinkError: /usr/lib/java/libObjCJava.A.dylib: no suitable
image found. Did find: /usr/lib/java/libObjCJava.A.dylib: no matching
architecture in universal wrapper
Hopefully, the Growl wrapper is a really small class, and it should be rather easy to rewrite it with SWT’s internal Cocoa packages for someone who knows Cocoa (I don’t). If you want to take a look at the wrapper, just download my attachment to Bug 209911 and take a look at the class : com.growl.Growl.
Solve ClassNotFoundExceptions with Maven war projects on Eclipse
