RestTemplate vs WebClient

The goal of this project is to compare WebClient and RestTemplate in a Spring MVC application on Wildfly.

WebClient is part of the WebFlux reacive stack, but it can improve the performance of a classic application, for example a Spring MVC application on Wildfly.

This repository contains two simple application:

• rest-template-vs-web-client: Spring App that exposes two endpoints:
  • /resttemplate/samples/{id}: call the service exposed by slow-application using RestTemplate;
  • /webclient/samples/{id}: call the service exposed by slow-application using WebClient;
• slow-application: a very simple node application in order to simulate a slow app (response time 2 seconds).
  • /samples/:id and return a json like this { id: 1, details : "Exmplae details"};

Getting started

In order to build and run this project are required:

• Apache Maven;
• JDK 8+;
• Wildfly;
• Node.

An alternative is to run the docker compose:

docker-compose up

Test

You can compare the two modules with Apache Bench:

1. RestTemplate

   ab -n 5000 -c 500 http://127.0.0.1:8080/rest-template-vs-web-client/api/resttemplate/samples/7
   

2. Webclient

   ab -n 5000 -c 500 http://127.0.0.1:8080/rest-template-vs-web-client/api/webclient/samples/7