Introducing serverless functions
A serverless function is a model that can be used to develop and execute software components or modules without needing to know or worry about an underlying hosting platform. These software modules or components are known as Lambda functions or Cloud functions in the public cloud providers' product offerings. Amazon was the first vendor that offered such serverless functions on its AWS platform as AWS Lambda. It was followed by Google and Microsoft, which offer Google Cloud Functions and Azure Functions, respectively.
Typically, a serverless function has four components, as follows:
Figure 12.1 – The components of a serverless function
These four components are described next:
- Functional code: This is a programming unit that performs certain tasks as per the business or functional goal of the function. For example, we can write a serverless function to process an input stream of data or write a scheduled...
