MemoryHandler在应用程序终止时不推送

Question

我正在使用带有MemoryHandler的java.util.logging编写Java Server应用程序。

当应用程序终止时，如何让MemoryHandler将数据推送到文件？

我尝试添加ShutDownHook并手动将数据推送到文件，但是当达到“hook”时，似乎已经删除了日志处理程序。

这是我的代码：

public class example implements Runnable{
static {
    // Set upp logging
    // Adding a MemoryHandler
    FileHandler fileHandler = null;
    MemoryHandler memoryHandler;

    try {
        fileHandler = new FileHandler("myapp.log");
        fileHandler.setLevel(Level.ALL);
    } catch (IOException e) {
        e.printStackTrace();
    }

    memoryHandler = new MemoryHandler( fileHandler, 100, Level.SEVERE);
    Logger rootLogger = Logger.getLogger("");
    rootLogger.addHandler(memoryHandler);
}


public static void main(String[] args) throws Exception {

        Thread serverThread = new Thread(new example());
        serverThread.setDaemon(false);
        serverThread.start();
}

public void run() {

    Runtime.getRuntime().addShutdownHook(new Thread() {
        @Override
        public void run() {
            // This is execute when application are shutting down.
            //
            // MemoryHandler are not not in the handlers list
            for (Handler handler: Logger.getLogger("").getHandlers())
            {
                System.out.println("Looping handlers");
                if (handler.getClass() == MemoryHandler.class)
                {
                   System.out.println("Memoryhandler found");
                   //This never happens.
                   ((MemoryHandler)handler).push();
                }

        }
    });

    try {
        // ALOT OF STUFF
    }
    catch (Exception ex)
    {
    }

}
}

请指教！