Java (SWT/JFace) - 处理 Runnable 内的所有异常

发布于 2024-12-09 04:00:53 字数 1412 浏览 0 评论 0原文

我有一个 SWT/JFace 应用程序，它使用 Realm（不确定概念）类将主程序作为线程运行。我试图在我的主代码周围使用 try/catch 块来捕获任何未捕获的异常：

public static void main(String args[]) {
    // ref: http://forums.instantiations.com/viewtopic.php?f=1&t=1583
    Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
        public void run() {
            try {
                PropertyConfigurator.configure("log4j.properties");
                MainWindow window = new MainWindow();
                window.setBlockOnOpen(true);
                window.open();
                Display.getCurrent().dispose();
            } catch (Exception e) {
                MessageDialog.openError(null, "Error", "Error occurred: " + e.getMessage());
                logger.error("Error!!!", e);
                e.printStackTrace();
            }
        }
    });
}

错误会被很好地抛出回 window.open() 行，但随后会传递到 Realm，所以永远不会到达catch块。这是堆栈跟踪的结尾：

at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at com.ism.MainWindow$1.run(MainWindow.java:210) <-- "window.open();"
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at com.ism.MainWindow.main(MainWindow.java:204) <-- "Realm.runWithDefault....."

尝试在 Realm.runWithDefault 周围放置 try/catch，但这也不起作用。

在这种情况下如何捕获所有异常？

原文

I have an SWT/JFace application that uses the Realm (not sure of the concept) class to run the main program as a thread. I'm trying to catch any uncaught exceptions using a try/catch block around my main code:

public static void main(String args[]) {
    // ref: http://forums.instantiations.com/viewtopic.php?f=1&t=1583
    Realm.runWithDefault(SWTObservables.getRealm(display), new Runnable() {
        public void run() {
            try {
                PropertyConfigurator.configure("log4j.properties");
                MainWindow window = new MainWindow();
                window.setBlockOnOpen(true);
                window.open();
                Display.getCurrent().dispose();
            } catch (Exception e) {
                MessageDialog.openError(null, "Error", "Error occurred: " + e.getMessage());
                logger.error("Error!!!", e);
                e.printStackTrace();
            }
        }
    });
}

The errors get thrown back to the window.open() line fine, but are then passed on to Realm, so the catch block is never reached. Here's the end of a stack trace:

at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at com.ism.MainWindow$1.run(MainWindow.java:210) <-- "window.open();"
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at com.ism.MainWindow.main(MainWindow.java:204) <-- "Realm.runWithDefault....."

Tried putting a try/catch around Realm.runWithDefault but that didn't work either.

How do I capture all of the exceptions in this case?

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星軌x 2024-12-16 04:00:53

某些 UI 可运行对象在显示事件循环中抛出Exception。您需要设置不同的事件循环异常处理程序。（默认情况下只是将异常打印到控制台。）

例如：

Window.setExceptionHandler(new Window.IExceptionHandler() {
    public void handleException(Throwable error) {
        MessageDialog.openError(null, "Error", "Error: " + error.getMessage());
    }
});

或者，当然，您可以像示例中那样在顶层重新抛出并捕获。

但请注意，这是 Window 上的静态方法，因此此异常处理程序是应用程序范围。

Some UI runnable is throwing an Exception in the display event loop. You need to set up a different event loop exception handler. (The default simply prints the exception to the console.)

For example:

Window.setExceptionHandler(new Window.IExceptionHandler() {
    public void handleException(Throwable error) {
        MessageDialog.openError(null, "Error", "Error: " + error.getMessage());
    }
});

Or, of course, you could rethrow and catch at your top-level like in your example.

Note, however, that this is a static method on Window, so this exception handler is application-wide.

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