4

我们正在构建一个基于 Netbeans 平台的应用程序,其中一部分是我们使用的特定语言的编辑器。

我们有以下类来突出语法中的错误:

class SyntaxErrorsHighlightingTask extends org.netbeans.modules.parsing.spi.ParserResultTask {

public SyntaxErrorsHighlightingTask () {
}

@Override
public void run (org.netbeans.modules.parsing.spi.Parser.Result result, org.netbeans.modules.parsing.spi.SchedulerEvent event) {
    try {
        final javax.swing.text.Document document = result.getSnapshot().getSource ().getDocument(false);
        final List<ErrorDescription> errors = new ArrayList<ErrorDescription> ();
        // finds errors on the document and add them to 'errors' list
        }

        /***
        OFFENDING CODE GOES HERE
        ***/

    } catch (javax.swing.text.BadLocationException ex1) {
        org.openide.util.Exceptions.printStackTrace (ex1);
    } catch (org.netbeans.modules.parsing.spi.ParseException ex1) {
        Exceptions.printStackTrace (ex1);
    }
}

@Override
public int getPriority () {
    return 100;
}

@Override
public Class<? extends Scheduler> getSchedulerClass () {
    return Scheduler.EDITOR_SENSITIVE_TASK_SCHEDULER;
}

@Override
public void cancel () {
}

}

引发异常的违规代码是:

org.netbeans.spi.editor.hints.HintsController.setErrors (document, "testsequence", errors);

根据搜索结果,改成如下:

SwingUtilities.invokeLater(new Runnable() {

                @Override
                public void run() {
                     System.err.println("is EDT? " + SwingUtilities.isEventDispatchThread());
                     HintsController.setErrors (document, "testsequence", errors);
                }
           });

以下是在编辑器中引入语法错误时发生的情况:

is EDT? true
SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.spi.editor.hints.HintsController$1
java.lang.IllegalStateException: Must be run in EQ
    at org.netbeans.editor.Annotations.addAnnotation(Annotations.java:195)
    at org.netbeans.modules.editor.NbEditorDocument.addAnnotation(NbEditorDocument.java:251)
    at org.openide.text.NbDocument.addAnnotation(NbDocument.java:504)
    at org.netbeans.modules.editor.hints.AnnotationHolder$NbDocumentAttacher.attachAnnotation(AnnotationHolder.java:235)
    at org.netbeans.modules.editor.hints.AnnotationHolder.attachAnnotation(AnnotationHolder.java:208)
    at org.netbeans.modules.editor.hints.AnnotationHolder.updateAnnotationOnLine(AnnotationHolder.java:674)
    at org.netbeans.modules.editor.hints.AnnotationHolder.setErrorDescriptionsImpl(AnnotationHolder.java:899)
    at org.netbeans.modules.editor.hints.AnnotationHolder.access$1300(AnnotationHolder.java:113)
    at org.netbeans.modules.editor.hints.AnnotationHolder$4.run(AnnotationHolder.java:812)
    at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1409)
    at org.netbeans.modules.editor.hints.AnnotationHolder.setErrorDescriptions(AnnotationHolder.java:809)
    at org.netbeans.modules.editor.hints.HintsControllerImpl.setErrorsImpl(HintsControllerImpl.java:111)
    at org.netbeans.modules.editor.hints.HintsControllerImpl.setErrors(HintsControllerImpl.java:93)
    at org.netbeans.spi.editor.hints.HintsController$1.run(HintsController.java:79)
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to
    at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
    at org.netbeans.spi.editor.hints.HintsController.setErrors(HintsController.java:77)
    at com.#.#.#.editor.parser.SyntaxErrorsHighlightingTask$1.run(SyntaxErrorsHighlightingTask.java:74)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:602)
    at java.awt.EventQueue$1.run(EventQueue.java:600)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
    at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

发生的情况是,在 EDT(EventDispatch 线程)中调用 HintsController。但是,Annotations.addAnnotation() 正在另一个线程中运行 - 有时在“系统剪贴板同步器”线程中,有时在“非活动请求处理器”线程中。因为它检查它是否在 EDT 上运行,所以它总是抛出一个 IllegalStateException。

我不是使用 Netbeans 平台的专家,而且我对公司的这个特定应用程序还很陌生——所以我可能会遗漏一些非常明显的东西。谷歌没有太大帮助。有人有什么建议吗?

4

2 回答 2

3

事实证明,这毕竟不是代码问题。

正如NetBeans-dev列表中指出的那样:

HintsController.setErrors 可以从任何线程调用——它使用自己的工作线程,并在必要时重新调度到 AWT 线程。

在 AWT 线程中调用 Annotations.addAnnotation 的要求已经在很久以前被删除了:http: //hg.netbeans.org/main-silver/rev/db82e4e0fbcc

相同的变更集还删除了自动重新调度到 NbDocument.addAnnotation 中的 AWT 线程。因此,您正在使用的构建似乎具有变更集的第二部分,但没有第一部分(...)

在仔细查看了 maven 的pom.xml文件后,我意识到应用程序正在加载较新版本的库,而模块正在加载旧版本,因此它会运行错误的代码。与此相关的 SO 问题。

于 2012-02-02T10:37:32.947 回答
1

也许您应该尝试使用以下方法更新错误:

private void updateError(javax.swing.text.Document document, List<ErrorDescription> errors) {
    if(javax.swing.SwingUtilities.isEventDispatchThread()) {
        HintsController.setErrors (document, "testsequence", errors);
    }
    else {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                 HintsController.setErrors (document, "testsequence", errors);
            }
       });
    }    
}
于 2012-01-30T10:23:47.837 回答