Eclipse 插件开发 - The resource tree is locked for modifications

实现效果: 监听Eclipse修改文件时, 同时更新某一个文件, 因为更新采用的是外部程序, 所以修改的时候需要调用Eclipse的方法Resources.refreshLocal重新加载这个文件.

添加监听

ResourcesPlugin.getWorkspace().addResourceChangeListener(
resourceChangeListener, IResourceChangeEvent.POST_BUILD);

在resourceChangeListener中刷新文件

IFile f = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(new Path("D:/depot/workspace/itart/src/main.java"));
f.refreshLocal(IResource.DEPTH_ZERO, null);

异常信息

org.eclipse.core.internal.resources.ResourceException: The resource tree is locked for modifications.
at org.eclipse.core.internal.resources.WorkManager.checkIn(WorkManager.java:116)
at org.eclipse.core.internal.resources.Workspace.prepareOperation(Workspace.java:2282)
at org.eclipse.core.internal.resources.Resource.refreshLocal(Resource.java:1655)
at org.eclipse.core.internal.resources.File.refreshLocal(File.java:333)
at top.itart.auto.grunt.handlers.ExecuteHandler.refreshFile(ExecuteHandler.java:52)
at top.itart.auto.grunt.handlers.ExecuteHandler.execute(ExecuteHandler.java:40)
at top.itart.auto.grunt.handlers.FileChangeHandler.handle(FileChangeHandler.java:14)
at top.itart.auto.grunt.listener.ResourceChangeListener.resourceChanged(ResourceChangeListener.java:66)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:118)
at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:75)
at org.eclipse.ui.internal.editors.text.WorkspaceOperationRunner.run(WorkspaceOperationRunner.java:65)
at org.eclipse.ui.editors.text.TextFileDocumentProvider.executeOperation(TextFileDocumentProvider.java:456)
at org.eclipse.ui.editors.text.TextFileDocumentProvider.saveDocument(TextFileDocumentProvider.java:772)
at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:5048)
at org.eclipse.wst.jsdt.internal.ui.javaeditor.CompilationUnitEditor.performSave(CompilationUnitEditor.java:1210)
at org.eclipse.wst.jsdt.internal.ui.javaeditor.CompilationUnitEditor.doSave(CompilationUnitEditor.java:1263)
at org.eclipse.ui.texteditor.AbstractTextEditor$TextEditorSavable.doSave(AbstractTextEditor.java:7177)
at org.eclipse.ui.Saveable.doSave(Saveable.java:214)
at org.eclipse.ui.internal.SaveableHelper.doSaveModel(SaveableHelper.java:349)
at org.eclipse.ui.internal.SaveableHelper$3.run(SaveableHelper.java:195)
at org.eclipse.ui.internal.SaveableHelper$5.run(SaveableHelper.java:277)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
at org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:759)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:756)
at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2649)
at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:285)
at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:264)
at org.eclipse.ui.internal.SaveableHelper.saveModels(SaveableHelper.java:207)
at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:144)
at org.eclipse.ui.internal.EditorManager.savePart(EditorManager.java:1399)
at org.eclipse.ui.internal.WorkbenchPage.savePart(WorkbenchPage.java:3416)
at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3429)
at org.eclipse.ui.internal.handlers.SaveHandler.execute(SaveHandler.java:54)
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.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:468)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:786)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:885)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:567)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:508)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:123)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.ja
4000
va:1052)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1100)
at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1509)
at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4640)
at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4528)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4972)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2531)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3752)
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(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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)

分析: Eclipse在触发POST_CHANGE事件时, 会对资源文件进行锁定

方案1: 创建一个Job 来执行文件刷新事件. 

Job job = new Job("Load Project") {
@Override
protected IStatus run(IProgressMonitor monitor) {

// Put your logic here
IFile f = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(new Path(ApplicationContext.getRefreshFilePath()));
f.refreshLocal(IResource.DEPTH_ZERO, null);
return Status.OK_STATUS;
}
};
job.setUser(true);
job.schedule();

缺点是执行的时候会弹出一个提示对话框, 虽然会自动消失, 但是看起来突兀, 建议采用方案2.

方案2: 将监听事件POST_BUILD, 改为 PRE_BUILD

ResourcesPlugin.getWorkspace().addResourceChangeListener(
resourceChangeListener, IResourceChangeEvent.PRE_BUILD);