Petite

Petite is one great little IoC container and components manager. Petite is easy to use since it requires no external configuration; it is incredibly fast, lightweight and super-small; so anyone can quickly grasp how it works. Petite is quite extensible and open for customization; and non-invasive.

Quick Overview

The following bean shows some basic Petite usage:

@PetiteBean
public class Foo {
​
// dependency injected in the ctor
@PetiteInject
public Foo(ServiceOne one) {...}
​
// dependency injected in a field
@PetiteInject("serviceTwo")
ServiceTwo two;
​
// dependency injected with the method
@PetiteInject
public void injectService(ServiceThree three) {...}
​
// dependency injected with the method
public void injectService(
@PetiteInject ServiceFour four) {...}
​
// initialization method
@PetiteInitMethod
public void init() {...}
​
public void foo() {
}
}

Foo is Petite bean that defines several injection points, for different depending services from the container. Put this bean in the classpath and let PetiteContainer find it and register as a bean. Or register it manually if you like that way more.

Why should I use it?

Petite is one of the lightest Java DI container around. Still, it supports sufficient most of features offered by other containers.

Here are the key features:

  • property, method and constructor injection points.

  • Instance life-cycle management, ordered initialization methods.

  • Adding external objects to container.

  • Wiring external objects with container's context.

  • Creating objects by container.

  • Automatic registration: no XML or code needed, just annotations.

  • Programmatic configuration: using plain Java.

  • Scopes: Prototype, Singleton and custom scopes.

  • Thread local scope for thread singletons.

  • HTTP session scope for session singletons.

  • Designed to be extended.