Let's conclude this section with the following facts about Light 4j, as it may help you determine whether to choose Light 4j for RESTful API development:

• Java-SE-based framework

• Scalable design

• Low latency

• Small memory footprint

• Several handlers as plugins

• Out-of-the-box OAuth2 integration (security-first design)

• Easy integration with other frameworks

• A built-in dependency-injection framework

• Benchmarks indicate as this the fastest RESTful framework

• May involve a steep learning curve due to poor documentation

• New to market/industry, so not much feedback yet on production systems

Light-rest-4j, built on top of the light4j framework, is very promising and gaining popularity due to various features—lightweight, very low latency, designed for scalability, not J2EE-based but J2SE-based, and its security-first design.