Trying to inject a collection of providers which implement an interface but
consistently getting issues with injection as below
No implementation for
java.util.Collection<com.google.inject.Provider<TypesChangeListener>> was bound.
[ERROR] at
com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:435)
[ERROR] at
com.google.inject.internal.InternalInjectorCreator.initializeStatically(InternalInjectorCreator.java:154)
[ERROR] at
com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:106)
Module
========
Multibinder<TypesChangeListener> typesChangeListenerBinder =
Multibinder.newSetBinder(binder(), TypesChangeListener.class);
typesChangeListenerBinder.addBinding().to(GraphBackedSearchIndexer.class);
// bind the MetadataService interface to an implementation
bind(MetadataService.class).to(DefaultMetadataService.class).asEagerSingleton();
Injected class
==============
@Inject
DefaultMetadataService(final B b, final C c, final
Collection<Provider<TypesChangeListener>> typeChangeListeners)
GraphBackedSearchIndexer implements TypesChangeListener
I see that Multibinder<TypesChangeListener> typesChangeListenerBinder =
Multibinder.newSetBinder(binder(), TypesChangeListener.class);
is actually resulting in Set<TypesChangeListener> rather than
Set<Provider<TypesChangeListener>> which is what I need?
The javadoc for MultiBinder -
http://google.github.io/guice/api-docs/latest/javadoc/index.html?com/google/inject/multibindings/Multibinder.html
says "Collection<Provider<T>> could also be injected" but does not provide any
examples.
Please let me know how this can be achieved.
Thanks
Suma
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