Eclipse插件开发: Discouraged access: The type EclipseStarter is not accessible due to restriction on required library

Question

我知道“不鼓励访问”的含义:您正在使用内部库，这些东西不在公共(public) API 中，而您根本不应该使用它。

现在，据我所知，“org.eclipse.osgi.util”包中的 EclipseStarter 类是公共(public) API 的一部分。我引用:

This package specifies API to start the platform.
Clients may use the EclipseStarter loader class to start the platform. 
The EclipseStarter class is the only defined API in this package.

来源:http://help.eclipse.org/helios/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fapi%2Forg%2Feclipse%2Fosgi%2Futil%2Fpackage-summary.html

EclipseStarter 类的详细信息页面说明了这一点:

Special startup class for the Eclipse Platform. This class cannot be instantiated; 
all functionality is provided by static methods.

Note that the fields on this class are not API.

我读到:方法可以使用吗？

我的代码:

import org.eclipse.core.runtime.adaptor.EclipseStarter;

这个已经给出了警告“不鼓励访问:由于所需库 [path-to-eclipse]\plugins\org.eclipse.osgi_3.7.2.v20120110-1415.jar 的限制，无法访问 EclipseStarter 类型”

我使用该类的代码:

try {
    EclipseStarter.shutdown();
    EclipseStarter.startup(null, null);
} catch (Exception e) {
    e.printStackTrace();
}

警告:不鼓励访问:由于所需库 [path-to-eclipse]\plugins\org.eclipse.osgi_3.7.2.v20120110-1415.jar 的限制，无法访问 EclipseStarter 类型

警告:不鼓励访问:由于所需库 [path-to-eclipse]\plugins\org.eclipse.osgi_3.7.2.v20120110-1415.jar< 的限制，无法访问 EclipseStarter 类型的 shutdown() 方法

警告:不鼓励访问:由于所需库 [path-to-eclipse]\plugins\org.eclipse.osgi_3.7.2.v20120110 的限制，无法访问 EclipseStarter 类型的启动方法(String[], Runnable) -1415.jar

我知道，我现在正在使用空值调用启动方法，这可能不起作用，但我现在只是在编写代码 - 尚未运行。我不喜欢这些警告。要么我在这方面完全错误(并且 EclipseStarter 不是公开的)，要么我的配置中的某些内容是错误的......

我尝试调整类路径，使插件依赖项排在第一位(在内部 JRE 之前)，但这也不起作用。这些警告所讨论的库位于依赖项中，而不是我的 JRE 中。我不知道我还能尝试什么。

无论哪种方式，底线我实际上正在寻找一种以编程方式重新启动 Eclipse 的好方法。插件代码首先安装一些额外的插件(没有警告，用户也必须接受所有这些插件的许可协议(protocol))，然后应该重新启动。我一直在使用PlatformUI.getWorkbench().restart();到目前为止，但这在日志中重新启动时给了我一个错误(“事件循环”或其他)。

有谁能给我指出正确的方向吗？谢谢!

---

编辑: PlatformUI.getWorkbench().restart() 的错误给我的是以下内容:

eclipse.buildId=M20120208-0800
java.version=1.6.0_43
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=nl_BE
Framework arguments:  -product org.eclipse.epp.package.rcp.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product
    org.eclipse.epp.package.rcp.product

Error
Thu Nov 07 12:34:11 CET 2013
Unhandled event loop exception

org.eclipse.swt.SWTException: Widget is disposed
    at org.eclipse.swt.SWT.error(SWT.java:4282)
    at org.eclipse.swt.SWT.error(SWT.java:4197)
    at org.eclipse.swt.SWT.error(SWT.java:4168)
    at org.eclipse.swt.widgets.Widget.error(Widget.java:468)
    at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340)
    at org.eclipse.swt.widgets.Tree.getItems(Tree.java:3249)
    at org.eclipse.jface.viewers.TreeViewer.getChildren(TreeViewer.java:171)
    at org.eclipse.jface.viewers.AbstractTreeViewer.internalCollectExpandedItems(AbstractTreeViewer.java:1588)
    at org.eclipse.jface.viewers.AbstractTreeViewer.getExpandedElements(AbstractTreeViewer.java:1180)
    at org.eclipse.ui.internal.dialogs.NewWizardNewPage.storeExpandedCategories(NewWizardNewPage.java:626)
    at org.eclipse.ui.internal.dialogs.NewWizardNewPage.saveWidgetValues(NewWizardNewPage.java:544)
    at org.eclipse.ui.internal.dialogs.NewWizardSelectionPage.saveWidgetValues(NewWizardSelectionPage.java:99)
    at org.eclipse.ui.internal.dialogs.NewWizard.performFinish(NewWizard.java:128)
    at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:831)
    at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:432)
    at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
    at org.eclipse.jface.window.Window.open(Window.java:801)
    at org.eclipse.ui.internal.handlers.WizardHandler$New.executeHandler(WizardHandler.java:257)
    at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:277)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
    at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
    at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)
    at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157)
    at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
    at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
    at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    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:344)
    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:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1386)

---

编辑2:我很确定发生上述错误是因为这段代码是错误的。我该如何编写 PerformFinish 代码才能避免发生该错误？与asyncExec ？

@Override
public final boolean performFinish() {
    if (getContainer().getCurrentPage().equals(myLastPage)) {
        PlatformUI.getWorkbench().restart();
        return true;
    } else {
        return false;
    }
}

---

编辑 3: 嗯，我将 PerformFinish 代码更改为使用 asyncExec ，但现在我收到此错误:

!ENTRY org.eclipse.ui 4 0 2013-11-07 13:56:21.380
!MESSAGE Unhandled event loop exception
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.swt.SWTException: Widget is disposed)
    at org.eclipse.swt.SWT.error(SWT.java:4282)
    at org.eclipse.swt.SWT.error(SWT.java:4197)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:138)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4140)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3757)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)
    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:344)
    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:622)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1410)
    at org.eclipse.equinox.launcher.Main.main(Main.java:1386)
Caused by: org.eclipse.swt.SWTException: Widget is disposed
    at org.eclipse.swt.SWT.error(SWT.java:4282)
    at org.eclipse.swt.SWT.error(SWT.java:4197)
    at org.eclipse.swt.SWT.error(SWT.java:4168)
    at org.eclipse.swt.widgets.Widget.error(Widget.java:468)
    at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340)
    at org.eclipse.swt.widgets.Text.setText(Text.java:1966)
    at helper.CustomProgressMonitor$1.run(CustomProgressMonitor.java:64)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
    ... 23 more

这个返回了大约 50 次，所以很明显，他在 Widget 被释放后仍然试图执行某些操作。

这是新的 performFinish代码:

@Override
public final boolean performFinish() {
    if (getContainer().getCurrentPage().equals(myLastPage)) {
        Display.getDefault().asyncExec(new Runnable() {
            public void run() {
                PlatformUI.getWorkbench().restart();
            }
        });
        return true;
    } else {
        return false;
    }
}

---

完整一点:现在一切正常。还有另一个类(辅助类)，我在访问文本小部件之前没有检查它是否已被释放。一旦解决了，一切都会变得有魅力。感谢 greg-449!

Answer 1

PlatformUI.getWorkbench().restart();是重新启动的正确方法(除非您正在运行纯“e4”RCP)。您需要查看导致事件循环错误的原因。

该包包含 EclipseStarter标记在 org.eclipse.osgi MANIFEST.MF与 x-friends="org.eclipse.core.runtime"这意味着它仅供 org.eclipse.core.runtime 使用所有其他插件都会收到阻止访问警告。