subprocess.Popen does exactly what you want. from subprocess import Popen p = Popen([‘watch’, ‘ls’]) # something long running # … do other stuff while subprocess is running p.terminate() (Edit to complete the answer from comments) The Popen instance can do various other things like you can poll() it to see if it is still running, … Read more
The really tricky part here was killing the long running task through passing the executor thread from the Action back to a place where it could be aborted. I accomplished this with the use of a wrapped delegate that passes out the thread to kill into a local variable in the method that created the … Read more
Neither of these options is correct. You’re trying to implement a synchronous interface asynchronously. Don’t do that. The problem is that when DoOperation() returns, the operation won’t be complete yet. Worse, if an exception happens during the operation (which is very common with IO operations), the user won’t have a chance to deal with that … Read more
Use HttpWebRequest.BeginGetResponse() HttpWebRequest webRequest; void StartWebRequest() { webRequest.BeginGetResponse(new AsyncCallback(FinishWebRequest), null); } void FinishWebRequest(IAsyncResult result) { webRequest.EndGetResponse(result); } The callback function is called when the asynchronous operation is complete. You need to at least call EndGetResponse() from this function.
I just discovered that there is a cleaner way to do your new Thread(new Runnable() { public void run() { //Do whatever } }).start(); (At least in Java 8), you can use a lambda expression to shorten it to: new Thread(() -> { //Do whatever }).start(); As simple as making a function in JS!
Interesting observation. Note that in JavaScript you can normally replace inline anonymous callback functions with named function variables. The following: http.createServer(function (req, res) { // inline callback function … getSomeData(client, function (someData) { // another inline callback function … getMoreData(client, function(moreData) { // one more inline callback function … }); }); // etc … }); … Read more
In Javascript, there are synchronous and asynchronous functions. Synchronous Functions Most functions in Javascript are synchronous. If you were to call several synchronous functions in a row doSomething(); doSomethingElse(); doSomethingUsefulThisTime(); they will execute in order. doSomethingElse will not start until doSomething has completed. doSomethingUsefulThisTime, in turn, will not start until doSomethingElse has completed. Asynchronous Functions … Read more
Having an argument in your it function (done in the code below) will cause Jasmine to attempt an async call. //this block signature will trigger async behavior. it(“should work”, function(done){ //… }); //this block signature will run synchronously it(“should work”, function(){ //… }); It doesn’t make a difference what the done argument is named, its … Read more
Here’s an excellent article I would recommend you reading to better understand asynchronous processing in ASP.NET (which is what asynchronous controllers basically represent). Let’s first consider a standard synchronous action: public ActionResult Index() { // some processing return View(); } When a request is made to this action a thread is drawn from the thread … Read more
When you run something asynchronously it means it is non-blocking, you execute it without waiting for it to complete and carry on with other things. Parallelism means to run multiple things at the same time, in parallel. Parallelism works well when you can separate tasks into independent pieces of work. Take for example rendering frames … Read more