我在http://eclipse.geekyramblings.net/2010/12/14/preventing-multiple-instances/上读到了如何防止多个RCP实例被启动的方法。但是当我将我的RCP(它是基于“Hello RCP”模板的简单RCP)制作成可执行文件并尝试启动它时,它会抛出这个错误。
java.io.IOException: The location has not been set.
at org.eclipse.core.runtime.internal.adaptor.BasicLocation.lock(BasicLocation.java:174)
at testrcp.Application.start(Application.java:43)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
我正在使用Eclipse Java EE IDE for Web Developers.
版本:Helios Service Release 1 构建编号:20100917-0705
这是我的Application.java文件中的代码:
package testrcp;
import org.eclipse.core.runtime.Platform;
import org.eclipse.equinox.app.IApplication;
import org.eclipse.equinox.app.IApplicationContext;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;
/**
* This class controls all aspects of the application's execution
*/
public class Application implements IApplication {
/* (non-Javadoc)
* @see org.eclipse.equinox.app.IApplication#start(org.eclipse.equinox.app.IApplicationContext)
*/
public Object start(IApplicationContext context) throws Exception {
Display display = PlatformUI.createDisplay();
int exitCode = IApplication.EXIT_OK;
Location instanceLocation = Platform.getInstanceLocation();
if (!instanceLocation.lock()) {
MessageDialog.openError(new Shell(display), "App Title",
"Another instance of the Application is currently running.");
} else {
int returnCode = PlatformUI.createAndRunWorkbench(display,
new ApplicationWorkbenchAdvisor());
switch (returnCode) {
case PlatformUI.RETURN_RESTART :
exitCode = IApplication.EXIT_RESTART;
break;
default :
exitCode = IApplication.EXIT_OK;
}
}
instanceLocation.release();
display.dispose();
return exitCode;
}
/* (non-Javadoc)
* @see org.eclipse.equinox.app.IApplication#stop()
*/
public void stop() {
if (!PlatformUI.isWorkbenchRunning())
return;
final IWorkbench workbench = PlatformUI.getWorkbench();
final Display display = workbench.getDisplay();
display.syncExec(new Runnable() {
public void run() {
if (!display.isDisposed())
workbench.close();
}
});
}
}
非常感谢您提供的帮助解决这个问题或者任何建议。谢谢,Abbas。
-Dosgi.instance.area.default=@user.dir/workspace
- Jarek Przygódzki