What is Azure Functions?
Azure Functions is a serverless compute service that lets you run code on demand. You don't have to manage any servers; Azure handles scaling and provisioning. You only pay for the time your code is running.
Functions are ideal for event-driven workloads, such as processing data, responding to HTTP requests, or reacting to changes in other Azure services.
Key Concepts
- Serverless Computing: Azure Functions provides a serverless computing environment, meaning you don't manage servers.
- Triggers: Triggers are events that initiate the execution of a function. Common triggers include HTTP requests, timers, and messages from Azure Storage.
- Bindings: Bindings allow you to easily connect your functions to other Azure services, such as Azure Storage, Azure SQL Database, and Azure Service Bus.
- Expressions: Expressions provide a way to perform calculations and manipulate data within your functions.
Types of Functions
Azure Functions supports different execution contexts:
- HTTP Triggers: Functions that are invoked by HTTP requests.
- Timer Triggers: Functions that are executed on a schedule.
- Storage Triggers: Functions that are triggered by events in Azure Storage, such as a new blob being uploaded.
Example: HTTP Trigger
function HttpExample(req, res) {
res.status(200).send('Hello from Azure Functions!');
}