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.