AWS Lambda is a serverless computing platform that enables developers to run code without having to provision or manage servers. AWS Lambda functions are executed in response to events, making it ideal for tasks that don’t require a long running process.
Lambda functions are written in Java and run on the AWS Lambda platform. To use Lambda, you first create an AWS Lambda function, which is a Java code package that defines the function’s name, input and output types, and other details.
You then upload the function to the AWS Lambda platform.
Lambda functions can be written in Java, Node.js, Python, and C#. In this article, we will focus on Java.
When you create a Lambda function, you specify the code that Lambda should execute and the event source where Lambda should get the event data. When the event source sends an event, Lambda runs your code.
Lambda provides a runtime environment for your code to run in. This runtime environment includes everything that your code needs to execute, including the AWS SDK for Java.
When your code is invoked, Lambda allocates an instance of your function and provides it with an event object that contains the event data. Your code can then process the event data and return a response.
Lambda automatically scales your function based on the incoming traffic. You don’t need to provision or manage any servers when using Lambda.
Lambda charges you based on the number of requests that your function receives and
Once the function is uploaded, you can begin invoking it. To invoke the function, you use the AWS Lambda invocation API.
The invocation API allows you to specify the function’s name, input and output parameters, and other details. You can also specify the event that triggered the invocation.
Once you’ve invoked the function, the AWS Lambda platform returns the results. The results are in the form of a response object.
The response object contains the function’s output and any errors that occurred during the invocation.
