Wicket 无法停止使用AbstractAjaxTimerBehavior创建的计时器

我正在编写一个单页wicket应用程序。当用户单击导航项时，将打开一个新选项卡。要求有两种类型的面板，一种是普通面板，另一种是自动刷新面板

我有一个TabPanel类，它从Panel扩展而来，Panel实际上包含了所有选项卡和管理选项卡的方法，如add、remove、set current

下面是我添加到TabPanel的客户计时器

private class AutoRefreshTimer extends AbstractAjaxTimerBehavior {
    public AutoRefreshTimer(Duration updateInterval) {
        super(updateInterval);
    }
    @Override
    protected void onTimer(AjaxRequestTarget target) {
        Tab currentTab = getCurrentTab();
        if(currentTab != null) {
            if(currentTab.getPanel() instanceof AutoRefreshPanel) {
                AutoRefreshPanel ajaxRefreshPanel = (AutoRefreshPanel) currentTab.getPanel();
                ajaxRefreshPanel.onRefresh(target);
            }
        }
    }
}

下面是添加计时器“autoRefreshTimer”的方法，它是TabPanel类中的一个实例变量

private void addNewAutoRefreshTimer(final Duration autoRefreshInterval) {
    autoRefreshTimer = new AutoRefreshTimer(autoRefreshInterval);
    add(autoRefreshTimer);
}

以下是控制计时器的方法：

public void startAutoRefreshTimer(final AjaxRequestTarget target, final Duration autoRefreshInterval) {
    if(!autoRefreshTimer.isStopped()) 
        addNewAutoRefreshTimer(autoRefreshInterval);
    autoRefreshTimer.restart(target);
}

public void stopAutoRefreshTimer(final AjaxRequestTarget target, final Duration autoRefreshInterval) {
    if(autoRefreshTimer.isStopped())
        addNewAutoRefreshTimer(autoRefreshInterval);
    autoRefreshTimer.stop(target);
}

public void toggleAutoRefreshTimer(final AjaxRequestTarget target){
    Tab currentTab = getCurrentTab();
    if(currentTab != null) {
        if(currentTab.getPanel() instanceof AutoRefreshPanel) {
            AutoRefreshPanel ajaxRefreshPanel = (AutoRefreshPanel)currentTab.getPanel();
            this.autoRefreshInterval = ajaxRefreshPanel.getAutoRefreshInterval();
            startAutoRefreshTimer(target, this.autoRefreshInterval);
            return;
        }
    }
    stopAutoRefreshTimer(target, this.autoRefreshInterval);
}

当用户在选项卡之间切换时，计时器在“我的本地服务器”中启动和停止，或者打开新选项卡，或者切换到“已打开”，或者关闭当前选项卡（选择上一个选项卡），或者关闭另一个选项卡而不从当前选项卡切换。 但是，当我在远程位置的登台服务器中测试相同内容时，计时器在以下场景中失败

以下是在Remote中创建问题的步骤：

1. Open two Normal tabs.
2. Open a tab containing AutoRefreshPanel.
3. Close 1st or 2nd normal tab by keeping the tab containing AutoRefreshPanel active/current. This expect the timer to be
fired/running.
4. Switch to the remaining Normal tab. This stops the timer in local server but not in Remote.

除上述所有其他场景中的步骤外，计时器在本地和远程环境中均按预期启动和停止

//更新：我找到了此问题的修复程序。但不确定这是不是最好的。以下是我所做的更改：

private class AutoRefreshTimer extends AbstractAjaxTimerBehavior {
    public AutoRefreshTimer(Duration updateInterval) {
        super(updateInterval);
    }
    @Override
    protected void onTimer(AjaxRequestTarget target) {
        Tab currentTab = getCurrentTab();
        if(currentTab != null) {
            if(currentTab.getPanel() instanceof AutoRefreshPanel) {
                AutoRefreshPanel ajaxRefreshPanel = (AutoRefreshPanel) currentTab.getPanel();
                ajaxRefreshPanel.onRefresh(target);
                return; // added return
            }
        }
        stop(target); // added a call to stop method.
    }
}

// Replaced startAutoRefreshTimer, stopAutoRefreshTimer and toggleAutoRefreshTimer with the following method:
public void manageAutoRefreshTimer(final AjaxRequestTarget target){
    Tab currentTab = getCurrentTab();
    if(currentTab != null) {
        if(currentTab.getPanel() instanceof AutoRefreshPanel) {
            AutoRefreshPanel ajaxRefreshPanel = (AutoRefreshPanel)currentTab.getPanel();
            this.autoRefreshInterval = ajaxRefreshPanel.getAutoRefreshInterval();
            if(!autoRefreshTimer.isStopped()) 
                addNewAutoRefreshTimer(autoRefreshInterval);
            autoRefreshTimer.restart(target);
        }
    }
}

---

我觉得奇怪的是，在

start

和

stop

方法中，您都向组件添加了行为的新实例。这将添加几个计时器行为。我尝试了删除（行为）方法，但出现错误。