Guice is distributed under the open source Apache License.

Guice uses @interface annotation to wire the beans which is easier than wiring beans with XML and faster than autowiring. Guice users find this easier and smaller compared to other frameworks.

Guice-like dependency injection, on the other hand, requires changes to the annotations, i.e. the source code, when you want to inject a different implementation of some service, and annotations require additional imports in the source code. Wiring with XML separates the configuration from the source code.

External links

• google-guice - Google Code
• Extensions for Google Guice including warp-persist (integration with Hibernate, JPA, db4objects, query automation) and warp-servlet (extended servlet scopes)