NET Core applications you would typically do both of these in the Startup. ConfigureServices method. That's because Quartz. NET itself isn't tied to the hosted service implementation. You're free to run the Quartz scheduler yourself, as shown in the documentation.
If you run your application now, you'll see the Quartz service start up, and dump a whole lot of logs to the console:. At this point you now have Quartz running as a hosted service in your application, but you don't have any jobs for it to run. In the next section, we'll create and register a simple job. You should implement the Quartz.
Note that we're using dependency injection here to inject the logger into the constructor. I also decorated the job with the [DisallowConcurrentExecution] attribute. This attribute prevents Quartz. NET from trying to run the same job concurrently. Now we've created the job, we need to register it with the DI container along with a trigger.
NET has some simple schedules for running jobs, but one of the most common approaches is using a Quartz. NET Cron expression. Cron expressions allow complex timer scheduling so you can set rules like "fire every half hour between the hours of 8 am and 10 am, on the 5th and 20th of every month". Just make sure to check the documentation for examples as not all Cron expressions used by different systems are interchangeable.
The following example shows how to register the HelloWorldJob with a trigger that runs every 5 seconds:. And that's it! No more creating a custom IJobFactory or worrying about supporting scoped services. The default package handles all that for you—you can use scoped services in your IJob and they will be disposed when the job finishes. If you run you run your application now, you'll see the same startup messages as before, and then every 5 seconds you'll see the HelloWorldJob writing to the console:.
That's all that's required to get up and running, but there's a little too much boilerplate in the ConfigureServices method for adding a job for my liking. It's also unlikely you'll want to hard code the job schedule in your app. If you extract that to configuration, you can use different schedules in each environment, for example.
At the most basic level, we want to extract the Cron schedule to configuration. For example, you could add the following to appsettings. You can then easily override the trigger schedule for the HelloWorldJob in different environments. For ease of registration, we could create an extension method to encapsulate registering an IJob with Quartz, and setting it's trigger schedule. This code is mostly the same as the previous example, but it uses the name of the job as a key into the IConfiguration to load the Cron schedule.
This is essentially identical to our configuration, but we've made it easier to add new jobs, and move the details of the schedule into configuration. Much better! Note that although ASP. NET Core allows "on-the-fly" reloading of appsettings. NET loads all its configuration on app startup, so will not detect the change. Running the application again gives the same output: the job writes to the output every 5 seconds. In this post I introduced Quartz.
NET and showed how you can use the new Quartz. Hosting library to easily add an ASP. NET scheduler. I showed how to implement a simple job with a trigger and how to register that with your application so that the hosted service runs it on a schedule. For more details, see the Quartz. NET documentation. I also discuss Quartz in the second edition of my book, ASP. December 01, in ASP. Share on: Facebook.
Introduction - what is Quartz. As per their website : Quartz. You must be logged in to post a comment. NET library for running jobs in a Windows service 25th August no comments in Software development. Our use case Our customer wanted a solution where, they could run few sync jobs during the day from SQL database to other systems and services. So the solution is pretty straight forward. Install Quartz. NET nuget package. Setup Quartz.
NET library within the service. Implement a IJob interface, which does the processing. Install the Windows Service on the server and run it Below is a solution of the working Windows Service made out of 3 parts, app. Info "Starting service GetScheduler ; await sched. WithIntervalInSeconds Properties. Info "Running job Info "Stopping service InitializeComponent ;. GetScheduler ;.
Start ;. Build ;. ScheduleJob job , trigger ;. StartNew ; stopwatch. Info "Job Run! Error e. Message ; return Task. I can't be sure because debugging a Windows Service is very different.
The way I do it is to programatically launching the debugger from my code. Net runs jobs on a separate threads, but I'm not sure if VS can see other running threads when debugging a Windows Service. One of the most common reasons a job doesn't execute, is because you need to call the Start method on the scheduler instance.
But it's hard to say what the problem is if we don't have some sort of snippet of the code that does the scheduler creation and job registration. Definitely check out this article, which uses an XML config when the scheduler is instantiated. In case you would rather not use XML dynamically created tasks and such , replace the "Run" procedure from the article above with something like this:.
I have successfully used Quart. NET before in a Windows service. When the service starts-up I create the Scheduler Factory and then get the Scheduler. I then start the scheduler which implicitly reads in the configuration XML I have specified in the App.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to schedule tasks using Quartz. Net inside a Windows Service? Ask Question. Asked 10 years, 11 months ago.
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