如何重新启动e4 RCP应用程序。

A 3.* based RCP application will be restarted if IApplication.start returns IApplication.EXIT_RESTART. The class E4Application seems to always return EXIT_OK.

一个3。*基于RCP的应用程序将在IApplication时重新启动。开始返回IApplication.EXIT_RESTART。类E4Application似乎总是返回EXIT_OK。

org.eclipse.ui.IWorkbench also has a restart method, org.eclipse.e4.ui.workbench.IWorkbench does not.

引用。IWorkbench也有一个restart方法，org.eclipse.e4. workbench。IWorkbench没有。

So how can I restart an e4 RCP application?

那么如何重启e4 RCP应用程序呢?

3 个解决方案

#1

The current implementation in Eclipse 4.2 leads to a command with id org.eclipse.ui.file.restartWorkbench which ultimately leads to the handler class RestartWorkbenchHandler. This class is implemented as follows

Eclipse 4.2中的当前实现将生成一个带有id org. eclipsee .ui.file的命令。restartWorkbench最终导致处理程序类RestartWorkbenchHandler。这个类实现如下。

public Object execute(ExecutionEvent event){

    PlatformUI.getWorkbench().restart();
    return null;
}

Which means, that it is Eclipse 3.x dependent, as the PlatformUI class is not available in a pure Eclipse 4 based application anymore. So if you want to solve this task in your e4 Application, create a command, implement the handler and currently you will have some E3 code dependency!

也就是说，它是Eclipse 3。依赖于x的，因为PlatformUI类在纯基于Eclipse 4的应用程序中不再可用。因此，如果您想在e4应用程序中解决此任务，请创建一个命令，实现处理程序，目前您将拥有一些E3代码依赖项!

#2

Until this feature is introduced into e4 my workaround goes like this: I use my IApplication implementation as a wrapper to the E4Application. This way, I can return IApplication.EXIT_RESTART from the start method and Equniox will do the restart.

在e4中引入这个特性之前，我的解决方案是这样的:我使用IApplication实现作为E4Application的包装器。这样，我就可以返回IApplication。EXIT_RESTART from start方法，Equniox将重新启动。

Beware though, that this workaround uses an internal API, which is likely to change in the future!

但是要注意，这个解决方案使用了一个内部API，这在将来可能会改变!

package de.emsw.gosa.e4.application;

import org.eclipse.e4.ui.internal.workbench.swt.E4Application;
import org.eclipse.equinox.app.IApplication;
import org.eclipse.equinox.app.IApplicationContext;

public class MyE4Application implements IApplication {

    private static MyE4Application instance;

    public static MyE4Application getInstance() {
        return instance;
    }

    private Integer exitRet = IApplication.EXIT_OK;
    private E4Application e4app;

    public void setRestart() {
        exitRet = IApplication.EXIT_RESTART;
    }

    @Override
    public Object start(IApplicationContext context) throws Exception {
        instance = this;
        e4app = new E4Application();
        e4app.start(context);
        return exitRet;
    }

    @Override
    public void stop() {
        e4app.stop();
    }
}

When you you want to restart, you can now use the Singleton to set the return value:

当您想重新启动时，现在可以使用Singleton来设置返回值:

@Execute
public void execute(IWorkbench workbench) {
    MyE4Application.getInstance().setRestart();
    workbench.close();
}

I used a Singleton here, because it is easier to explain this way. A better solution is to register your IApplication as an OSGi service and have DI inject it into your handler.

我在这里使用了单例，因为这样更容易解释。更好的解决方案是将IApplication注册为OSGi服务，并让DI将其注入到处理程序中。

#3

org.eclipse.e4.ui.workbench.IWorkbench does now have a restart method in Eclipse Kepler (4.3).

org.eclipse.e4.ui.workbench。IWorkbench现在在Eclipse Kepler(4.3)中有一个重新启动方法。

#1