Customizable scanning of bean implementations.
The SpaceModule should be given a ClassSpace representing the classes and resources to scan:
Guice.createInjector( new SpaceModule( new URLClassSpace( classloader ) ) );Reduce scanning time by using an
index or provide your own ClassFinder approach:
Guice.createInjector( new SpaceModule( new URLClassSpace( classloader ), BeanScanning.INDEX ) );
QualifiedTypeVisitor with QualifiedTypeBinder to find types annotated with @Named or other @Qualifiers and bind them as follows:
BeanLocator uses to check type compatibility at lookup time:
(This avoids the need to walk the type hierarchy and register bindings for each and every super-type, turning the injector graph to spaghetti.)
@Named("example") public class MyTypeImpl implements MyType {
// ...
}
If you use an empty @Named or a different @Qualifier annotation then Sisu will pick a canonical name based on the implementation type.
Sometimes you need explicit typed bindings for external integration; you can list the types in a @Typed annotation or leave it empty to use the declared interfaces:
@Named @Typed public class MyTypeImpl implements MyType {
// ...
}
Default implementations can be indicated by using "default" as a binding name:
@Named("default") public class MyTypeImpl implements MyType {
// ...
}
or by starting the implementation name with "Default":
@Named public class DefaultMyType implements MyType {
// ...
}
Default components are bound without a qualifier and have a higher ranking than non-default components.
@Named public class MyProvider implements Provider<MyType> {
public MyType get() {
// ...
}
}
Use @Singleton to scope the provided binding(s) as a singleton:
@Named @Singleton public class MyProvider implements Provider<MyType> {
public MyType get() {
// ...
}
}
Note: this is different to the normal Guice behaviour where singleton only applies to the provider itself.
@Named public class MyModule extends AbstractModule {
@Override protected void configure() {
// ...
}
}
Mediators are registered with the BeanLocator:
@Named public class MyMediator implements Mediator<Named, MyType, MyWatcher> {
public void add( BeanEntry<Named, MyType> entry, MyWatcher watcher ) throws Exception {
// ...
}
public void remove( BeanEntry<Named, MyType> entry, MyWatcher watcher ) throws Exception {
// ...
}
}