Book Image

Building Serverless Architectures

By : Cagatay Gurturk
Book Image

Building Serverless Architectures

By: Cagatay Gurturk

Overview of this book

Over the past years, all kind of companies from start-ups to giant enterprises started their move to public cloud providers in order to save their costs and reduce the operation effort needed to keep their shops open. Now it is even possible to craft a complex software system consisting of many independent micro-functions that will run only when they are needed without needing to maintain individual servers. The focus of this book is to design serverless architectures, and weigh the advantages and disadvantages of this approach, along with decision factors to consider. You will learn how to design a serverless application, get to know that key points of services that serverless applications are based on, and known issues and solutions. The book addresses key challenges such as how to slice out the core functionality of the software to be distributed in different cloud services and cloud functions. It covers basic and advanced usage of these services, testing and securing the serverless software, automating deployment, and more. By the end of the book, you will be equipped with knowledge of new tools and techniques to keep up with this evolution in the IT industry.
Table of Contents (10 chapters)

Getting to know Lambda Framework

Lambda Framework was created for this use case. Lambda Framework accomplishes this target by implementing the most common JAX-RS annotations and providing a Maven plugin to deploy easily to the AWS cloud. Briefly, JAX-RS is a standard annotation set of J2EE which can be used to map regular Java methods to HTTP paths and methods. For instance, you can look at the following method:

@GET 
@Path("/helloworld/{id}") 
public Response indexEndpoint(@PathParam int id) { 
  return Response.status(200).entity("Hello world: " + id).build(); 
} 

This is a very lean method marked with the @GET and @Path annotations, which mean that this method is called when a GET request comes to URLs in the /helloworld/{id} format, with the id parameter as an argument. Finally, it returns a Response object within this method with a 200 response code and...