Status: New
Owner: ----
New issue 308 by bslesinsky: constructor injection gives better errors than
field injection for circular dependency
http://code.google.com/p/google-guice/issues/detail?id=308
When using field injection, the field was set to null and I got:
1) Error in custom provider, java.lang.NullPointerException
When I changed it to use constructor injection, I got much better errors
like:
1) Tried proxying com.google.jsearch.project.ProjectRegistry to support a
circular dependency, but it is not an interface.
... shows the circular dependency ...
2) Error injecting constructor, java.lang.IllegalStateException: This is a
proxy used to support circular references involving constructors. The
object we're proxying is not constructed yet. Please wait until after
injection has completed to use this object.
This was with r734.
Here's the stack trace for field injection:
at
com.google.inject.BoundProviderFactory.get(BoundProviderFactory.java:58)
at
com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:43)
at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:847)
at
com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.Scopes$1$1.get(Scopes.java:49)
at
com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:46)
at
com.google.inject.SingleParameterInjector.inject(SingleParameterInjector.java:41)
at
com.google.inject.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at
com.google.inject.ConstructorInjector.construct(ConstructorInjector.java:90)
at
com.google.inject.InjectorImpl$LateBoundConstructor.get(InjectorImpl.java:447)
at
com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:43)
at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:847)
at
com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.Scopes$1$1.get(Scopes.java:49)
at
com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:46)
at com.google.inject.InjectorImpl$3.get(InjectorImpl.java:526)
at
com.google.inject.SingleParameterInjector.inject(SingleParameterInjector.java:41)
at
com.google.inject.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
at
com.google.inject.ConstructorInjector.construct(ConstructorInjector.java:90)
at
com.google.inject.InjectorImpl$LateBoundConstructor.get(InjectorImpl.java:447)
at
com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:43)
at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:847)
at
com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.Scopes$1$1.get(Scopes.java:49)
at
com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:46)
at
com.google.inject.SingleFieldInjector.inject(SingleFieldInjector.java:54)
at
com.google.inject.ConstructorInjector.construct(ConstructorInjector.java:103)
at
com.google.inject.InjectorImpl$LateBoundConstructor.get(InjectorImpl.java:447)
at
com.google.inject.BoundProviderFactory.get(BoundProviderFactory.java:56)
at
com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:43)
at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:847)
at
com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
at com.google.inject.Scopes$1$1.get(Scopes.java:49)
at
com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:46)
at com.google.inject.InjectorBuilder$1.call(InjectorBuilder.java:200)
at com.google.inject.InjectorBuilder$1.call(InjectorBuilder.java:194)
at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:839)
at
com.google.inject.InjectorBuilder.loadEagerSingletons(InjectorBuilder.java:194)
at
com.google.inject.InjectorBuilder.injectDynamically(InjectorBuilder.java:175)
at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:115)
at com.google.inject.Guice.createInjector(Guice.java:92)
at com.google.inject.Guice.createInjector(Guice.java:69)
at com.google.inject.Guice.createInjector(Guice.java:59)
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