它是服务器端 Javascript(犀牛引擎),因此 setTimeout 不可用。如何异步运行函数?
问问题
9432 次
3 回答
41
您可以使用java.util.Timer
和java.util.TimerTask
滚动您自己的设置/清除超时和设置/清除间隔功能:
var setTimeout,
clearTimeout,
setInterval,
clearInterval;
(function () {
var timer = new java.util.Timer();
var counter = 1;
var ids = {};
setTimeout = function (fn,delay) {
var id = counter++;
ids[id] = new JavaAdapter(java.util.TimerTask,{run: fn});
timer.schedule(ids[id],delay);
return id;
}
clearTimeout = function (id) {
ids[id].cancel();
timer.purge();
delete ids[id];
}
setInterval = function (fn,delay) {
var id = counter++;
ids[id] = new JavaAdapter(java.util.TimerTask,{run: fn});
timer.schedule(ids[id],delay,delay);
return id;
}
clearInterval = clearTimeout;
})()
于 2011-04-24T00:32:53.917 回答
5
查看Rhino 示例页面Multithreaded Script Execution
上的示例。基本上,JavaScript 不直接支持线程,但您可以使用 Java 线程来实现您正在寻找的东西。
于 2010-02-14T16:42:48.570 回答
3
另一个使用ScheduledThreadPoolExecutor的版本,与 Rhino 1.7R4 兼容,由@Nikita-Beloglazov提出:
var setTimeout, clearTimeout, setInterval, clearInterval;
(function () {
var executor = new java.util.concurrent.Executors.newScheduledThreadPool(1);
var counter = 1;
var ids = {};
setTimeout = function (fn,delay) {
var id = counter++;
var runnable = new JavaAdapter(java.lang.Runnable, {run: fn});
ids[id] = executor.schedule(runnable, delay,
java.util.concurrent.TimeUnit.MILLISECONDS);
return id;
}
clearTimeout = function (id) {
ids[id].cancel(false);
executor.purge();
delete ids[id];
}
setInterval = function (fn,delay) {
var id = counter++;
var runnable = new JavaAdapter(java.lang.Runnable, {run: fn});
ids[id] = executor.scheduleAtFixedRate(runnable, delay, delay,
java.util.concurrent.TimeUnit.MILLISECONDS);
return id;
}
clearInterval = clearTimeout;
})()
于 2014-03-19T08:17:27.310 回答