Azure functions are easier to write and deploy.Azure functions are lightweight and serverless.Here are some of the reasons why you should use azure functions. For example, some azure functions are sending emails, starting back up, order processing, task scheduling such as database cleanup, sending notifications, messages, and IoT data processing. ![]() The azure functions will directly connect to your data source, get your customers' emails, and send them an email on a scheduled date and time.Īzure functions are best suited for smaller apps with events that can work independently of other websites. Instead of building a website in ASP.NET and employing and hosting it on IIS just for one feature, you can write an azure function, put your email login in the function, and deploy it on the Azure cloud. Let's say you have to send a birthday email to your customers. When demand for execution increases, more resources are allocated automatically to the service, and when requests fall, all extra resources and application instances drop off automatically. This article explains what an azure function is, how to create an azure function, and how to debug, test, and deploy azure functions.Īzure functions are scalable. In addition, azure functions can be written in multiple languages such as C#, Java, JavaScript, TypeScript, and Python. # find the path to the desktop folder: $desktop = :: GetFolderPath ( 'Desktop' ) # specify the path to the folder you want to monitor: $Path = $desktop # specify which files you want to monitor $FileFilter = '*' # specify whether you want to monitor subfolders as well: $IncludeSubfolders = $true # specify the file or folder properties you want to monitor: $AttributeFilter = :: FileName, :: LastWrite # specify the type of changes you want to monitor: $ChangeTypes = :: Created, :: Deleted # specify the maximum time (in milliseconds) you want to wait for changes: $Timeout = 1000 # define a function that gets called for every change: function Invoke-SomeAction # subscribe your event handler to all event types that are # important to you.Azure Functions is a serverless concept of cloud-native design that allows a piece of code to be deployed and executed without needing server infrastructure, web server, or any configurations. Whenever a change is detected, Invoke-SomeAction is called. This is straight-forward: the script below monitors your desktop and all of its subfolders for new files and for deletion of files. However, responding to events is not trivial in a single-threaded environment like PowerShell. This way, you cannot miss change events because the FileSystemWatcher is constantly monitoring. Instead, whenever a change occurs, an event is fired, and your script can respond to the events. ![]() Advanced Mode: In asynchronous mode, the FileSystemWatcher does not block PowerShell.This approachis very simple to implement however there is a chance to miss change events when they occur in rapid succession. This blocks PowerShell until either the change occurs or a timeout is reached. Simple Mode: In synchronous mode, you ask the FileSystemWatcher to wait for a single change.You can invoke the FileSystemWatcher in two ways: ![]() It can monitor a single folder or include all subfolders, and there is a variety of filters. The FileSystemWatcher object can monitor files or folders and notify PowerShell when changes occur. This way, you can create “drop” folders and respond to log file changes. ![]() With a FileSystemWatcher, you can monitor folders for file changes and respond immediately when changes are detected.
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