How to make azure webjob run continuously and call the public static function without automatic trigger

Question

I am developing a azure webjob which should run continuously. I have a public static function. I want this function to be automatically triggered without any queue. Right now i am using while(true) to run continuously. Is there any other way to do this?

Please find below my code

   static void Main()     {         var host = new JobHost();         host.Call(typeof(Functions).GetMethod("ProcessMethod"));         // The following code ensures that the WebJob will be running continuously         host.RunAndBlock();     }  [NoAutomaticTriggerAttribute] public static void ProcessMethod(TextWriter log) {     while (true)     {         try         {             log.WriteLine("There are {0} pending requests", pendings.Count);         }         catch (Exception ex)         {             log.WriteLine("Error occurred in processing pending altapay requests. Error : {0}", ex.Message);         }         Thread.Sleep(TimeSpan.FromMinutes(3));     } } 

Thanks

Answer 1

These steps will get you to what you want:

1. Change your method to async
2. await the sleep
3. use host.CallAsync() instead of host.Call()

I converted your code to reflect the steps below.

static void Main() {     var host = new JobHost();     host.CallAsync(typeof(Functions).GetMethod("ProcessMethod"));     // The following code ensures that the WebJob will be running continuously     host.RunAndBlock(); }  [NoAutomaticTriggerAttribute] public static async Task ProcessMethod(TextWriter log) {     while (true)     {         try         {             log.WriteLine("There are {0} pending requests", pendings.Count);         }         catch (Exception ex)         {             log.WriteLine("Error occurred in processing pending altapay requests. Error : {0}", ex.Message);         }         await Task.Delay(TimeSpan.FromMinutes(3));     } } 

Answer 2

Use the Microsoft.Azure.WebJobs.Extensions.Timers, see https://github.com/Azure/azure-webjobs-sdk-extensions/blob/master/src/ExtensionsSample/Samples/TimerSamples.cs to create a trigger that uses a TimeSpan or Crontab instruction to fire the method.

Add Microsoft.Azure.WebJobs.Extensions.Timers from NuGet to your project.

public static void ProcessMethod(TextWriter log) 

becomes

public static void ProcessMethod([TimerTrigger("00:05:00",RunOnStartup = true)] TimerInfo timerInfo, TextWriter log)  

for five minute triggers (using TimeSpan string)

You will need ensure your Program.cs Main sets up the config to use timers as follows:

static void Main()     {         JobHostConfiguration config = new JobHostConfiguration();         config.UseTimers();          var host = new JobHost(config);          // The following code ensures that the WebJob will be running continuously         host.RunAndBlock();     }