EntityManagerFactory类型的不明确依赖项

Question

我正在从WF 7.4.0.FINAL迁移到16.0.0.FINAL。解决了不同模块的升级问题之后，我遇到了以下问题：WELD Ambiguousdependent exception。如何保持与两个数据库的连接？

似乎SessionFactory的hibernate-core-5.3.9现在从EntityManagerFactory扩展了，而对于hibernate-core-4.2.14（WF7.4）则没有。 SessionFactory在HibernateProducer中定义，并且一个单独的实例注入到EnvironmentProducer中（专门用于jbpm）。似乎这两个相互干扰，而Wildfly 7.4中却没有。

它连接到2个数据库：一个jbpm和一个特定于应用程序的数据库。两者都定义了persistence.xml。

import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.persistence.PersistenceUnit;

public class HibernateProducer {


    @Produces
    @ApplicationScoped
    public SessionFactory getSessionFactory() {
        Configuration configuration = new Configuration();
        configuration.configure();

        return configuration.buildSessionFactory();
    }

    public void closeSessionFactory(@Disposes SessionFactory sessionFactory) {
        sessionFactory.close();
    }
}

import org.jbpm.persistence.JpaProcessPersistenceContextManager;
import org.jbpm.persistence.jta.ContainerManagedTransactionManager;
import org.jbpm.process.audit.JPAWorkingMemoryDbLogger;
import org.jbpm.process.core.timer.GlobalSchedulerService;
import org.jbpm.runtime.manager.impl.DefaultRuntimeEnvironment;
import org.jbpm.services.cdi.impl.manager.InjectableRegisterableItemsFactory;
import org.jbpm.services.task.persistence.JPATaskPersistenceContextManager;
import org.kie.api.io.Resource;
import org.kie.api.io.ResourceType;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.EnvironmentName;
import org.kie.api.task.UserGroupCallback;
import org.kie.internal.runtime.manager.RuntimeEnvironment;
import org.kie.internal.runtime.manager.cdi.qualifier.PerProcessInstance;
import org.kie.internal.runtime.manager.cdi.qualifier.PerRequest;
import org.kie.internal.runtime.manager.cdi.qualifier.Singleton;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.BeanManager;
import javax.inject.Inject;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;

@ApplicationScoped
public class EnvironmentProducer {

    @Inject
    protected BeanManager beanManager;
    @Inject
    protected CDIGlobalResolver globalResolver;
    @Inject
    protected GlobalSchedulerService schedulerService;
    @Inject
    protected UserGroupCallback userGroupCallback;
    @PersistenceUnit(unitName = "org.jbpm.domain")
    protected EntityManagerFactory emf;

//  @Inject
//  protected ContainerManagedTransactionManager transactionManager;

    @Inject
    private Instance<ResourceProducer> resourceProducers;

    @Produces
    @Singleton
    @PerRequest
    @PerProcessInstance
    public RuntimeEnvironment produceEnvironment() {

        DefaultRuntimeEnvironment runtimeEnvironment = new DefaultRuntimeEnvironment();
        runtimeEnvironment.addToConfiguration("drools.commandService",
                SingleThreadCommandService.class.getName());
        runtimeEnvironment.setEmf(emf);
        runtimeEnvironment.setSchedulerService(schedulerService);
        runtimeEnvironment.setUserGroupCallback(userGroupCallback);
        runtimeEnvironment
                .setRegisterableItemsFactory(InjectableRegisterableItemsFactory
                        .getFactory(beanManager, new JPAWorkingMemoryDbLogger(
                                emf)));

        Environment env = runtimeEnvironment.getEnvironmentTemplate();
        runtimeEnvironment.addToConfiguration("drools.commandService",
                SingleThreadCommandService.class.getName());
        runtimeEnvironment.addToEnvironment(EnvironmentName.GLOBALS,
                globalResolver);
        runtimeEnvironment.addToEnvironment(
                EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
        runtimeEnvironment.addToEnvironment(
                EnvironmentName.TRANSACTION_MANAGER, new ContainerManagedTransactionManager());
        runtimeEnvironment.addToEnvironment(
                EnvironmentName.PERSISTENCE_CONTEXT_MANAGER,
                new JpaProcessPersistenceContextManager(env));
        runtimeEnvironment.addToEnvironment(
                EnvironmentName.TASK_PERSISTENCE_CONTEXT_MANAGER,
                new JPATaskPersistenceContextManager(env));

        for (ResourceProducer resourceProducer : resourceProducers) {
            ResourceType resourceType = resourceProducer.getResourceType();
            for (Resource resource : resourceProducer.getResources()) {
                runtimeEnvironment.addAsset(resource, resourceType);
            }
        }

        runtimeEnvironment.init();

        return runtimeEnvironment;
    }

    @Produces
    @ApplicationScoped
    //@Named
    public EntityManagerFactory getEntityManagerFactory() {
        return emf;
    }
}

Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001409: Ambiguous dependencies for type EntityManagerFactory with qualifiers @Default
  at injection point [BackedAnnotatedParameter] Parameter 1 of [BackedAnnotatedMethod] @Inject public be.bside.process.jbpm.service.ProcessEngineService.init(EntityManagerFactory)
  at be.bside.process.jbpm.service.ProcessEngineService.init(ProcessEngineService.java:0)
  Possible dependencies: 
  - Producer Method [SessionFactory] with qualifiers [@Any @Default] declared as [[BackedAnnotatedMethod] @Produces @ApplicationScoped public be.bside.common.store.HibernateProducer.getSessionFactory()],
  - Producer Method [EntityManagerFactory] with qualifiers [@Any @Default] declared as [[BackedAnnotatedMethod] @Produces @ApplicationScoped public be.bside.process.jbpm.service.EnvironmentProducer.getEntityManagerFactory()]

Answer 1

一个简单的解决方法是将@Typed(SessionFactory.class)放在您的@Typed(SessionFactory.class)方法上。