Edit 2018: Please look into Object getters and setters and Proxies. Old answer below: a quick and easy solution goes like this: var something=999; var something_cachedValue=something; function doStuff() { if(something===something_cachedValue) {//we want it to match setTimeout(doStuff, 50);//wait 50 millisecnds then recheck return; } something_cachedValue=something; //real action } doStuff();
If you are interested in knowing when a certain task completes, or a certain batch of tasks, you may use ExecutorService.submit(Runnable). Invoking this method returns a Future object which may be placed into a Collection which your main thread will then iterate over calling Future.get() for each one. This will cause your main thread to … Read more
Locking is about protecting shared data. The lock is on the data structure being protected. The threads are the things accessing the data structure. The locks are on the data structure object in order to keep the threads from accessing the data structure in an unsafe way. Any object can be used as an intrinsic … Read more
Here is a sample program that may somehow manages to demonstrate the capability of a selenium library to fulfill what you want. You need to download the selenium library and set it to your IDE first before you can run this program. The program allows you to click a button. Then the firefox browser automatically … Read more
Learning to think in terms of events is indeed the key here. You can do it. 🙂 The first rule is: never stall the UI thread. The UI thread is responsible for keeping your app feeling responsive. Any work you do there should not block; do what you need to do and return as quickly … Read more
Thread.Sleep(500) will force the current thread to wait 500ms. It works, but it’s not what you want if your entire application is running on one thread. In that case, you’ll want to use a Timer, like so: using System.Timers; void Main() { Timer t = new Timer(); t.Interval = 500; // In milliseconds t.AutoReset = … Read more
Nothing equivalent to wait(). The usual practice is to poll using kill(pid, 0) and looking for return value -1 and errno of ESRCH to indicate that the process is gone. Update: Since linux kernel 5.3 there is a pidfd_open syscall, which creates an fd for a given pid, which can be polled to get notification … Read more
Manual cleanup: You can KILL the processid. mysql> show full processlist; +———+————+——————-+——+———+——-+——-+———————–+ | Id | User | Host | db | Command | Time | State | Info | +———+————+——————-+——+———+——-+——-+———————–+ | 1193777 | TestUser12 | 192.168.1.11:3775 | www | Sleep | 25946 | | NULL | +———+————+——————-+——+———+——-+——-+———————–+ mysql> kill 1193777; But: the php application might … Read more
I wrote a super simple delay function for an application I developed in Qt. I would advise you to use this code rather than the sleep function as it won’t let your GUI freeze. Here is the code: void delay() { QTime dieTime= QTime::currentTime().addSecs(1); while (QTime::currentTime() < dieTime) QCoreApplication::processEvents(QEventLoop::AllEvents, 100); } To delay an event … Read more
Fermin, Anthony +1. Thanks to all, you gave me the part of answer. My final solution: 1.Create or generate (free Ajax loading gif generator) animation and add it to project. 2.Create ResponseCallback interface (see Coderholic – Blackberry WebBitmapField) to receive thread execution result: public interface ResponseCallback { public void callback(String data); } 3.Create a class … Read more