playframework / playframework/play-samples

play-java-ebean-example is not working fails with BeanNotEnhancedException

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Description

The sample play-java-ebean-example has a runtime exception: [Guice/ErrorInjectingConstructor]: BeanNotEnhancedException: Bean class models.Company is not enhanced?

INFO  p.a.h.HttpErrorHandlerExceptions - Registering exception handler: guice-provision-exception-handler
INFO  p.a.d.DefaultDBApi - Database [default] initialized
INFO  p.a.d.HikariCPConnectionPool - Creating Pool for datasource 'default'
@87gkd436b: Execution exception[[CreationException: Unable to create injector, see the following errors:

1) [Guice/ErrorInjectingConstructor]: BeanNotEnhancedException: Bean class models.Company is not enhanced? Check packages specified in ebean.mf. If you are running in IDEA or Eclipse check that the enhancement plugin is installed. See https://ebean.io/docs/trouble-shooting#not-enhanced
  at EbeanDynamicEvolutions.<init>(EbeanDynamicEvolutions.java:42)
  at EbeanDynamicEvolutions.class(EbeanDynamicEvolutions.java:35)
  while locating EbeanDynamicEvolutions
  at EbeanModule.bindings(EbeanModule.java:20):
Binding(class DynamicEvolutions to ConstructionTarget(class EbeanDynamicEvolutions) eagerly)
      \_ installed by: Modules$OverrideModule -> GuiceableModuleConversions$$anon$4
  while locating DynamicEvolutions
  while locating ApplicationEvolutionsProvider
  at EvolutionsModule.<init>(EvolutionsModule.scala:23):
Binding(class ApplicationEvolutions to ProviderConstructionTarget(class ApplicationEvolutionsProvider) eagerly)
      \_ installed by: Modules$OverrideModule -> GuiceableModuleConversions$$anon$4
  while locating ApplicationEvolutions

Learn more:
  https://github.com/google/guice/wiki/ERROR_INJECTING_CONSTRUCTOR
Caused by: BeanNotEnhancedException: Bean class models.Company is not enhanced? Check packages specified in ebean.mf. If you are running in IDEA or Eclipse check that the enhancement plugin is installed. See https://ebean.io/docs/trouble-shooting#not-enhanced
	at BeanDescriptorManager.confirmEnhanced(BeanDescriptorManager.java:1234)
	at BeanDescriptorManager.setAccessors(BeanDescriptorManager.java:1120)
	at BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1049)
	at BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:613)
	at BeanDescriptorManager.deploy(BeanDescriptorManager.java:275)
	at InternalConfiguration.<init>(InternalConfiguration.java:111)
	at DefaultContainer.createServer(DefaultContainer.java:114)
	at DefaultContainer.createServer(DefaultContainer.java:33)
	at DatabaseFactory.createInternal(DatabaseFactory.java:135)
	at DatabaseFactory.create(DatabaseFactory.java:84)
	at EbeanDynamicEvolutions.lambda$start$2(EbeanDynamicEvolutions.java:58)
	at java.base/HashMap.forEach(HashMap.java:1430)
	at EbeanDynamicEvolutions.start(EbeanDynamicEvolutions.java:58)
	at EbeanDynamicEvolutions.<init>(EbeanDynamicEvolutions.java:46)
	at EbeanDynamicEvolutions$$FastClassByGuice$$3dd7f92.GUICE$TRAMPOLINE(<generated>)
	at EbeanDynamicEvolutions$$FastClassByGuice$$3dd7f92.apply(<generated>)
	at DefaultConstructionProxyFactory$FastClassProxy.newInstance(DefaultConstructionProxyFactory.java:82)
	at ConstructorInjector.provision(ConstructorInjector.java:114)
	at ConstructorInjector.construct(ConstructorInjector.java:91)
	at ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:300)
	at ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
	at SingletonScope$1.get(SingletonScope.java:169)
	at InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:45)
	at FactoryProxy.get(FactoryProxy.java:60)
	at ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
	at SingletonScope$1.get(SingletonScope.java:169)
	at InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:45)
	at InjectorImpl$1.get(InjectorImpl.java:1148)
	at InjectorImpl.getInstance(InjectorImpl.java:1186)
	at GuiceInjector.instanceOf(GuiceInjectorBuilder.scala:434)
	at GuiceInjector.instanceOf(GuiceInjectorBuilder.scala:429)
	at ContextClassLoaderInjector.$anonfun$instanceOf$2(Injector.scala:118)

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The affected entry point is the play-java-ebean-example, which fails while constructing EbeanDynamicEvolutions. Start by running the sample and inspecting its Ebean enhancement configuration, including ebean.mf. Done means the sample starts without BeanNotEnhancedException.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend, database
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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