}); async/await - when to return a Task vs void? Was Gandalf on Middle-earth in the Second Age? Is this meat that I was told was brisket in Barcelona the same as U.S. brisket? The user will have to wait for a very long page load, and will have zero information about the task's status, but this is super-simple to implement. In the sample code below I queue a background job which simulates incrementing the progress of the job every 100 milliseconds and then writes the progress to the Debug Output window: return Json(taskId); I used this method to implement excel reports for asp.net mvc application. Can FOSS software licenses (e.g. How can I make a script echo something when it is paused? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This interface exposes a Report (T) method, which the async task calls to report progress. Your web app should add a record to db to indicate that operation should start, and your windows service which periodicaly checks for new records in db should start performing task and report progress to db. We introduced the IProgress<T> interface to enable you to create an experience for displaying progress. I did write it as a Windows service. there is no HTTP request that is open as long as the task runs. 503), Fighting to balance identity and anonymity on the web(3) (Ep. There appear to be a number of options: The process will know the connectionId so that it can send messages back to the client, like this: Here, log is a client-side method that you want to call from the server, hence it should be defined like you usually do with SignalR: If you have an access to your web server machine as a choice you can create windows service or simple console application to perform long running work. How to make a Thread pause in Spring mvc project? Examples of this could be invoking an external and slow API or sending an email, which you don't want the caller of your API to wait for. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. rev2022.11.7.43014. Thread.Sleep(50); // simulate long running operation How do you create a dropdownlist from an enum in ASP.NET MVC? }. What would be the best aproach in Spring MVC a how to avoid syncronisation issues. clearInterval(intervalId); } On the server side of things, you can start your process on a different thread and retutn 200 OK to the client. What is this political cartoon by Bob Moran titled "Amnesty" about? I am using EF6, MVC 5 in VS 2013.I have a long running task which is causing timeout errors and so I want to set it running as a separate background task and return immediately to the web controller. Basicaly get the value of cn. Replace first 7 lines of one file with content of another file. I've been experimenting with the AsyncController as that seems to be a nice way of running long processes without tying up resources, but it doesn't appear to give me any way of checking on the progress (and seems to block further JSON requests and I haven't discovered why yet). This project uses: spring-boot spring-mvc jQuery Bootstrap Tag 1.0: Only contains the example with polling. What's the meaning of negative frequencies after taking the FFT in practice? How to render an ASP.NET MVC view as a string? var taskId = Guid.NewGuid(); How to respond with an HTTP 400 error in a Spring MVC @ResponseBody method returning String, Spring MVC @PathVariable with dot (.) } else { There are multiple ways of implementing this using a message broker, a fire and forget API request, or something completely third. How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office? Here, our microservices solve this problem by communicating using an asynchronous communication pattern between them by utilizing RabbitMq queues for the long-running checkout process: In our demo application, the /checkout endpoint returns a status code of OK (200). Of course there was a comment about SignalR posted almost 2 years ago on the question above. Making statements based on opinion; back them up with references or personal experience. Why? rev2022.11.7.43014. I have a long-running task which is causing timeout errors and so I want to set it running as a separate background task and return immediately to the web controller. { Thank you for the feedback. Write the task's details to a server and use a Windows service to process them. Was Gandalf on Middle-earth in the Second Age? $("#" + taskId).html("Task [" + taskId + "]: " + status); @CodeCaster thanks. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, What is the output of the report (screen, pdf?). private const string sessionKey = "progress"; public Progress Progress { get { This seems like a pretty good answer. Why don't American traffic signs use pictograms as much as other countries? What are the weather minimums in order to take off under IFR conditions? One solution could be: in your async thread, write to a DB, and have your checking code check the DB table for progress. $("#start").click(function (e) { Making statements based on opinion; back them up with references or personal experience. // Init monitors If you have long running (server side) tasks in your ASP.NET MVC 3 web application it could be reasonable to provide the user with information about the current progress of this task. Ignoring synchronization issues you could do something like this: Thanks for contributing an answer to Stack Overflow! This ASP.NET web site project (can be run from here) illustrates some basic techniques for starting a long running task on the web server side, with provisions for tracking the progress of the task using AJAX.. }); No need to use shared state (which is bad because it can lead to unexpected results), just use the HubContext class to connect to a Hub that sends messages to the client. The background task will report progress to an SQL server database. { You will be notified via email when the author replies to your comment. I know that this is an old thread but, I'm in a similar situation now. A better option would be to run it in a scheduled task, for example using Quartz.NET. Where to find hikes accessible in November and reachable by public transport from Denver? When the Littlewood-Richardson rule gives only irreducibles? tasks.Add(taskId, 0); Spring MVC how to get progress of running async task, Going from engineer to entrepreneur takes more than just good code (Ep. Do you have any tips and tricks for turning pages while singing without swishing noise. - the dictionary is used to allow for multiple users firing off individual long running tasks. if (progress >= 100) { Typeset a chain of fiber bundles with a known largest total space, Removing repeating rows and columns from 2d array, Space - falling faster than light? Tag 2.0: If you access localhost:8080 you get the "old" polling version. (clarification of a documentary). When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Find centralized, trusted content and collaborate around the technologies you use most. A planet you can take off from, but never land back. Please refer, ="~/Scripts/jquery.unobtrusive-ajax.min.js">")); You can do that with code like this: First, import a System.Threading namespace. } By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. So, I'm curious what you ended up using as a workaround for the session locking you were facing. Is there any way to have multiple times the same task, for example "processFile" called by more than one user, and having the progress for each user? 503), Fighting to balance identity and anonymity on the web(3) (Ep. How does DNS work when it comes to addresses after slash? for (var i = 0; i <= 100; i++) hello, how do you get the taskExecutor? here), except that we don't need any server-side method on our Hub. How do you create a dropdownlist from an enum in ASP.NET MVC? To learn more, see our tips on writing great answers. What I need, essentially, is fire and forget functionality. How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request? First, create a bean for your asynchronous task: Remember to configure an executor accordingly, e.g. Not the answer you're looking for? The background task will report progress to an SQL server database. { Check this github source, it gives pretty simple way of catching status of the background job using @Async of Spring mvc. It's a nice implementation, but it seems to me that this would only work for only one instance of the task going on. How do I update the GUI from another thread? The Progress action just returns the progress for a given GUID that uniquely identifies a task. Also, just use the @Async annotation to kick off the asynchronous thread - makes life easier and is a Spring Way To Do It. Then you can use Windows Service or Console App which might be running on the same server and constantly checking if there any new fields in the table. There are many project types that may have long running processes, e.g., complex calculation, multiple databases operations and Windows Workflows execution through MVC web app that are required to send current status to user. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 4.5 years after this question has been answered, and we have a library that can make this task much easier: SignalR. How to call asynchronous method from synchronous method in C#? The client side functionality is implemented in the Index.cshtml view: