Representational state transfer (REST) is a very popular architecture for distributed hypermedia. Lots of different web services expose their APIs in a RESTful manner. It is very convenient when a service of a choice provides a library for its API, but this is not always so. In this case you have to construct valid requests and parse responses by yourself. Assuming that you are familiar with REST itself, I will tell you how you can make your life easier with the help of Spring and Java annotations.

Hi, guys, today we’re gonna talk about the really interesting and tricky Grails task, implementation of the custom sorting.
It’s a pretty often appearing situation, when you need to sort the list of items, basing on the values that can only be calculated, and that are not persisted in the db.
I know what you might say, - "Hey, why don’t you just use transient properties for that?"

Unlike Java, which mixes primitive and reference types, Groovy handles everything in common manner — as objects, what makes it truly object-oriented. When a primitive type gets passed into the Groovy world, it is automatically “boxed” into its object equivalent, and vice versa. This allows Groovy to support some interesting concepts like methods on primitives, operator overloading and The Groovy Truth. Let’s look at them more closely.