Azure Functions: What it is, How it Works & Its Features
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What are Azure Functions?
Azure Functions is a server less computer service, which lets you easily write less code and maintain less infrastructure. It eliminates the need of deploying and maintaining servers, as the cloud infrastructure provides all the latest resources required to keep your apps running smoothly.
These functions are designed to accelerate and simplify application development. It supports functions developed in C#, F#, Node.js, PHP, bash, batch, and Python in an executable file format. The best thing about Azure Functions is that it has no limits on payload size, deployment package size, code, or any other dependency size. These functions make use of Azure Storage for managing triggers and log function execution. It supports triggers, which are one of the ways to start your code execution and bindings. Also, it simplifies coding to input and output data.
How Azure Functions Works?
The server less platform of Azure Functions lets teams build event-driven applications which can run code when triggered by predefined or preset events or conditions. Further, it automatically manages all the computing resources needed in those procedures. It further frees up DevOps teams to focus on developing and delivering features and functions. Also, it allows teams to run customized written code to connect with multiple services in JavaScript, Python, C#, or PHP in a containerized environment on and when required.
To develop and create Azure Functions, first of all, it is essential to have an active Azure subscription and not to mention an Azure Storage Account too. Further, developers create a function, where there is a logical unit meant for management, deployment, and resource sharing. Each separate unit serves as a microservice. The required code is then deployed in the cloud and then it performs like individual actions. Some examples: Processing individual files, Handling API calls, Managing and processing queued messages, processing pre-configured actions, etc.
Azure Functions can be triggered in numerous ways. Below are some options which include a pre-defined time by:
- Carrying out any change in Azure Queues
- Carrying out any change in Azure Storage Blob containers
- Messages from Service Bus
- HTTP Triggers
These triggers usually define how any function initiates code execution. Azure Functions follows a simple process not only to trigger code based on the data but also helps in accessing and processing that data. The data is then connected to the code with input and output bindings. Further, function bindings prove helpful for developers in interacting with the data sources and services. It also allows about the flow of data ‘to and from the function.
Both bindings and triggers in the Function help developers to avoid any type of hardcoding the service of Azure Functions.
Each function possesses a Git endpoint which helps in carrying out testing of your functions locally. If you want to call the endpoint on the local server, then it is purely dependent on the function you want to run and make use of HTTP requests. Azure Functions has integration with different third-party services, Azure services, and on-premises services to trigger functions and to server as input/output for the code.
Glance at Features of Azure Functions:
With Microsoft Azure, you get both the benefits of IaaS and PaaS with the convenience of making use of cloud infrastructure simultaneously.
- Freedom of language usage: Developers get the freedom to select the programming language of their choice. You can write functions in a variety of languages such as Python, PHP, Java, C#, F#, or Node.js. Also, you can make use of a programming model to carry out different types of activities like building HTTP-based API, carrying out communication with other servers, or orchestrating complex workflows.
- Easy-to-use web interface: Its intuitive browser-based interface allows you to write code or make use of your favorite development tool to build and debug. Its easy-to-use web interface responds to events generated by Event Hubs, Timers, Azure Queues, Table Storage, HTTP Requests, etc.
- Pay-per-use model: The best thing about Azure Functions is that you need to pay only for the duration till the code execution takes place. It gives you the freedom to scale up and down as per your requirement. This calculation is done by calculating the amount of time the functions operate in a particular billing period. This eliminates the need for resource management.
- Offers continuous deployment and integration: Azure Functions supports continuous deployment and integration even though it has serverless architecture. This is achieved through GitHub, Microsoft Visual Studio Team Services, and by making use of different development tools like Eclipse, Xcode, and IntelliJ IDEA.
- Simplified integration with Azure and 3rd-party services: It can be integrated easily with several Azure services apart from other third-party services such as Azure Event Hub, Azure CosmosDB, Azure Storage, etc. In several of the services, you need to run code snippets.
- Open-source: You can create functions in any language. Azure function is not dependent on any language.
- Implementation of customized features: You can easily carry implementation of customized features as templates, runtime, UI and underlying WebJobs SDK are all opensource projects.
- Functions Runtime is Portable: With Azure Functions Runtime being a portal, it makes the whole process easy from building to deploying serverless applications on the internal network or any public cloud. This ensures that you can run your serverless code anywhere. With the runtime being portable, Azure Functions can run anywhere even in other clouds, in a data center, and Azure as well.
- Code implementation capabilities: As the Functions are event-driven, the application platform possesses different capabilities for implementing code triggered by different events which occur in third-party service or on-premise system.
- Integrated security: It secures its HTTP-triggered functions with the use of OAuth providers like Google, Facebook, Microsoft, and Azure Active Directory Account.
- Independence of using preferred libraries: You can easily make use of your preferred libraries as Azure Functions does support NPM and NuGet.
Read more>> Top 10 Microsoft Azure Development Tools
Conclusion
Azure Functions can be considered as a job/event/integration-based solution, which is designed to accelerate the whole process of app development, thereby making it easy and simple. With its serverless architecture, you can focus on the creation and uploading of proper code. The main highlight of these Functions is that you can easily write code in its easy-to-use web interface, build and also debug them locally in your preferred machine.
If you are thinking to use Azure Functions to run your apps, then you can our professional azure consultants.
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