所以我正在运行Java服务器,在一个类中我有一个静态Timer.然后我有另一个类,它在程序的整个生命周期中创建和销毁了许多实例,每个实例都有自己的TimerTask(使用静态Timer).当一个实例被销毁时,它会在TimerTask上调用cancel().
问题是,我不确定这是不是很好的设计,而且在实例创建和调度TimerTask时我也会遇到错误:
java.lang.IllegalStateException: Timer already cancelled.
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这是一些显示我的意思的代码.
/**
* Starts scheduled tasks using TimerTask
*/
private void initTasks()
{
// room heartbeat thread: start immediately, run once every second
roomHeartbeatTask = new RoomHeartbeatTask(this);
RoomListExtension.roomHeartbeat.schedule(roomHeartbeatTask, 0, 1000);
// add additional tasks here
}
/**
* Cancels all tasks that have been started by this extension
*/
private void cancelTasks()
{
roomHeartbeatTask.cancel();
}
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