Package org.eclipse.sisu.inject

Dynamic bean lookup across multiple injectors.

The BeanLocator lets you lookup and keep watch for bean implementations; it does this by processing binding information from one or more BindingPublishers, such as injectors.

You can add or remove BindingPublishers using the MutableBeanLocator view; any existing watchers or returned collections are updated to reflect the latest binding information.

DefaultBeanLocator will automatically add any injectors it's bound in by virtue of an injected setter. This makes it easy to share across multiple injectors with a simple instance binding: 

 Module locatorModule = new AbstractModule() {
   private final DefaultBeanLocator locator = new DefaultBeanLocator();
   
   @Override protected void configure() {
     bind( DefaultBeanLocator.class ).toInstance( locator );
   }
 };
 
 Injector injectorA = Guice.createInjector( new WireModule( locatorModule, spaceModuleA ) );   // adds injectorA to locator
 Injector injectorB = Guice.createInjector( new WireModule( locatorModule, spaceModuleB ) );   // adds injectorB to locator
If you want to use a DefaultBeanLocator in a given injector, but don't want that injector added automatically, wrap the locator inside a provider to hide the injected setter from Guice: 

 bind( DefaultBeanLocator.class ).toProvider( Providers.of( locator ) );
By default all bindings in an injector are separated into two partitions (default vs non-default) and ranked according to their sequence number. This is so bindings from multiple injectors can be interleaved to keep default components prioritized before non-default, while still maintaining an overall ordering between injectors. To override the default bind your own RankingFunction: 

 bind( RankingFunction.class ).to( MyRankingFunction.class );