Lab 4: Create a function that triggers on a schedule

Task 1: Create a schedule-triggered function

On the taskbar, select the Windows Terminal icon.
Run the following command to change the current directory to the $HOME\training-az204\Labs\02\Starter\func directory:
```
 cd $HOME\training-az204\Labs\02\Starter\func
```
From the command prompt, run the following command to use the Azure Functions Core Tools to create a new function named Recurring, using the Timer trigger template:
```
 func new --template "Timer trigger" --name "Recurring"
```
Note: You can review the documentation to [create a new function][azure-functions-core-tools-new-function] using the Azure Functions Core Tools.
Close the currently running Windows Terminal application.

Task 2: Observe function code

On the Start screen, select the Visual Studio Code tile.
On the File menu, select Open Folder.
In the File Explorer window that opens, browse to $HOME\training-az204\Labs\02\Starter\func, and then select Select Folder.
On the Explorer pane of the Visual Studio Code window, open the Recurring.cs file.

In the code editor, observe the implementation:

 using System;
 using Microsoft.Azure.WebJobs;
 using Microsoft.Azure.WebJobs.Host;
 using Microsoft.Extensions.Logging;    
 namespace func
 {
     public static class Recurring
     {
         [FunctionName("Recurring")]
         public static void Run([TimerTrigger("0 */5 * * * *")]TimerInfo myTimer, ILogger log)
         {
             log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
         }
     }
 }

Task 3: Observe function runs

On the taskbar, select the Windows Terminal icon.
Run the following command to change the current directory to the $HOME\training-az204\Labs\02\Starter\func directory:
```
 cd $HOME\training-az204\Labs\02\Starter\func
```
From the command prompt, run the following command to run the function app project:
```
 func start --build
```
Note: You can review the documentation to [start the function app project locally][azure-functions-core-tools-start-function] using the Azure Functions Core Tools.
Observe the function run that occurs about every five minutes. Each function run should render a simple message to the log.
Close the currently running Windows Terminal application.

Task 4: Update the function integration configuration

On the Start screen, select the Visual Studio Code tile.
On the File menu, select Open Folder.
In the File Explorer window that opens, browse to $HOME\training-az204\Labs\02\Starter\func, and then select Select Folder.
On the Explorer pane of the Visual Studio Code window, open the Recurring.cs file.

In the code editor, observe the existing Run method signature:

 [FunctionName("Recurring")]
 public void Run([TimerTrigger("0 */5 * * * *")]TimerInfo myTimer, ILogger log)

Update the Run method signature code block to change the schedule to run once every 30 seconds:

 [FunctionName("Recurring")]
 public void Run([TimerTrigger("*/30 * * * * *")]TimerInfo myTimer, ILogger log)

Select Save to save your changes to the Recurring.cs file.

Task 5: Observe function runs

On the taskbar, select the Windows Terminal icon.
Run the following command to change the current directory to the $HOME\training-az204\Labs\02\Starter\func directory:
```
 cd $HOME\training-az204\Labs\02\Starter\func
```
From the command prompt, run the following command to run the function app project:
```
 func start --build
```
Note: You can review the documentation to [start the function app project locally][azure-functions-core-tools-start-function] using the Azure Functions Core Tools.
Observe the function run that occurs about every 30 seconds. Each function run should render a simple message to the log.
Close the currently running Windows Terminal application.
Close the Visual Studio Code window.

Review

In this exercise, you created a function that runs automatically based on a fixed schedule.

LAB 4 - Create a function that triggers on a schedule