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:

    public class Foo {

        // dependency injected in the ctor
        public Foo(ServiceOne one) {...}

        // dependency injected in a field
        ServiceTwo two;

        // dependency injected with the method
        public void injectService(ServiceThree three) {...}

        // dependency injected with the method
        public void injectService(
            @PetiteInject ServiceFour four) {...}

        // initialization method
        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.