1. Overview
In this article, we will introduce Ehcache, a widely used, open-source Java-based cache. It features memory and disk stores, listeners, cache loaders, RESTful and SOAP APIs and other very useful features.
To show how caching can optimize our application, we will create a simple method which will calculate square values of provided numbers. On each call, the method will call calculateSquareOfNumber(int number) method and print information message to the console.
With this simple example, we want to show that calculation of squared values is done only once, and every other call with same input value is returning result from cache.
It’s important to notice that we’re focused entirely on Ehcache itself (without Spring); if you want to see how Ehcache works with Spring, have a look at read this article.