org.eclipse.swt.SWTError: No more handles

Resources:
http://www.eclipse.org/articles/swt-design-2/swt-design-2.html
http://stackoverflow.com/questions/2018553/swt-no-more-handles
http://i-proving.com/2006/06/05/diagnosing-handle-leaks-in-swtrcp-windows-applications/
http://www.sybase.com/detail?id=1019174
http://www.eclipse.org/articles/swt-design-2/sleak.htm

What is User handle ?
http://msdn.microsoft.com/en-us/library/windows/desktop/ms725486(v=vs.85).aspx

Tools for identifying handles:
Process explorer to check the handles:
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx

http://ltearno.free.fr/dpus/

Using Sleak identify memory leaks
http://eclipsesource.com/blogs/2009/04/17/finding-swt-leaks-with-sleak/

What is eclipse workbench ?

A workbench is the root object for the Eclipse Platform user interface.

A workbench has one or more main windows which present to the end user information based on some underlying model, typically on resources in an underlying workspace. A workbench usually starts with a single open window, and automatically closes when its last window closes.

Each workbench window has a collection of pages; the active page is the one that is being presented to the end user; at most one page is active in a window at a time.

Each workbench page has a collection of workbench parts, of which there are two kinds: views and editors. A page's parts are arranged (tiled or stacked) for presentation on the screen. The arrangement is not fixed; the user can arrange the parts as they see fit. A perspective is a template for a page, capturing a collection of parts and their arrangement.

The platform creates a workbench when the workbench plug-in is activated; since this happens at most once during the life of the running platform, there is only one workbench instance. Due to its singular nature, it is commonly referred to as the workbench.

How to get eclipse workspace project path ?

public String getProjectPath(IProject project) {
   String absolutePath = project.getLocation().toFile().getAbsolutePath();
    return absolutePath ;
}

Converting Java io File to eclipse IFile resource

Below function will convert java.io File to eclipse IFile resource.

public IFile convert(File file) {
   IWorkspace workspace= ResourcesPlugin.getWorkspace();  
   IPath location= Path.fromOSString(file.getAbsolutePath());
   IFile ifile= workspace.getRoot().getFileForLocation(location);
 return ifile;

}

This works only when resource exists with in the workspace.

Accessing the resources outside the workspace:
http://wiki.eclipse.org/FAQ_How_do_I_open_an_editor_on_a_file_outside_the_workspace%3F

Debugging web applications - fiddler

For my reference.
http://www.telerik.com/fiddler

Configuring Permgen parameter for Tomcat

For my reference
http://www.mkyong.com/tomcat/tomcat-javalangoutofmemoryerror-permgen-space/

git pull: Couldn't reserve space for cygwin's heap, Win32 error 0

When I tried to pull the code from git, it took so long and finally it said "Couldn't reserve space for cygwin's heap, Win32 error 0"

There are various discussions which I found over web. But the first thing which i tried was "restarting my windows system" and it worked for me!!

Resources:
http://stackoverflow.com/questions/18502999/git-extensions-win32-error-487-couldnt-reserve-space-for-cygwins-heap-win32

https://cygwin.com/cygwin-ug-net/setup-maxmem.html

http://stackoverflow.com/questions/3144082/difference-between-msysgit-and-cygwin-git/3144417#3144417

Opening eclipse editor or view in the dialog programatically

We can open eclipse editor or view in the dialog by using the Eclipse e4 model services. This is also called detaching the editors/views from the eclipse workbench.

For this, you need to have e4 workbench plugin and it provides org.eclipse.e4.ui.workbench.modeling API services.


IWorkbench workbench = ActivatorPlugin.getDefault().getWorkbench();

//get editorpart somehow which you wanted to open it.
EditorPart openEditor = /*IDE.openEditor(workbench.getActiveWorkbenchWindow().getActivePage(), module, MyEditorID, false); */

//get editor site
IWorkbenchPartSite site = openEditor.getSite();

//get model service for editor site
EModelService modelService = (EModelService) site.getService(EModelService.class);
MPartSashContainerElement  mpartService = (MPart) site.getService(MPart.class);

//invoke detach on model service with coordinates.
modelService.detach(mpartService, 100, 100, 700, 700);


For view:

//Get view part
IViewPart view = workbench.getActiveWorkbenchWindow().getActivePage().findView(MyPerspective.ExplorerView_ID);
//get site for view
//invoke detach


Resources:
http://eclipsesource.com/blogs/tutorials/eclipse-4-e4-tutorial-part-7-services/
http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.platform.doc.user%2Ftasks%2Ftasks-9l.htm
http://mcuoneclipse.com/2012/02/29/go-multiply-and-detach-multiple-screens-with-eclipse/

Hide toolbar in eclipse programatically

You might want to remove eclipse toolbar completely in your Eclipse RCP product to make use of that space or you might not have any useful toolbar actions which are specific to your product.

This how you can remove programatically.

private void hideCoolbar() {
try {
IHandlerService service = (IHandlerService) PlatformUI.getWorkbench().getActiveWorkbenchWindow()
.getService(IHandlerService.class);
if (service != null)
service.executeCommand("org.eclipse.ui.ToggleCoolbarAction", null);
} catch (Exception e) {
KEditorPlugin.logError("Unable to hide the eclipse toolbar.",e);
}
}

Hide tool bar in eclipse

In eclipse 3.8 version and earlier, you can find "Hide Toolbar" option on the right click of eclipse toolbar itself. This will hide the complete toolbar.

In Eclipse e4 versions, you can find this option in on the Eclipse toolbar Window menu.
Window -> Hide Toolbar

To enable again,
Window -> Show Toolbar