Tutorial by Topics: lambda



Lambda expressions provide a clear and concise way of implementing a single-method interface using an expression. They allow you to reduce the amount of code you have to create and maintain. While similar to anonymous classes, they have no type information by themselves. Type inference needs to happen.

Method references implement functional interfaces using existing methods rather than expressions. They belong to the lambda family as well.

Retrolambda is a library which allows to use Java 8 lambda expressions, method references and try-with-resources statements on Java 7, 6 or 5.

The Gradle Retrolambda Plug-in allows to integrate Retrolambda into a Gradle based build. This allows for example to use these constructs in an Android application, as standard Android development currently does not yet support Java 8.

AWS Lambda is a service that lets you run back-end code without the need to provision or manage servers. AWS Lambda takes care of scaling and high availability. The cost directly depends on how often and how long your code executes.

You will find examples of how to create and deploy AWS Lambda functions in different languages.

As part of the Serverless movement, AWS recently announced C# support for AWS Lambda functions. In this article, I will show you how to develop, install and call a simple C# AWS Lambda Function using Visual Studio 2015.

Before you start this example, first go to the Remarks section of this document and make sure you have all of the required components installed.

Lambda developers will handle issues that requires the use of other AWS resources. This topic focuses on S3 (Simple Storage Service) which will commonly be used for storing static files and other configurations. This documentation will consider using AWS-SDK in lambda, accessing files in S3 from Lambda and triggering Lambda functions when an S3 event gets fired


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