Question

每当我在企业应用程序项目中使用CDI托管bean时，我都会遇到CDI部署失败：WELD-001408异常。这就是我得到的：

Injection method name must start with "set"
 symbol: javax.persistence.PersistenceUnit
 location: public javax.persistence.EntityManager de.syngenio.backend.beans.Resources.create(javax.persistence.EntityManagerFactory)

和例外：

Exception during lifecycle processing
org.glassfish.deployment.common.DeploymentException: CDI deployment failure:WELD-001408: Unsatisfied dependencies for type EntityManagerFactory with qualifiers @Default
  at injection point [BackedAnnotatedParameter] Parameter 1 of [BackedAnnotatedMethod] @Produces @ConversationScoped @PersistenceUnit public de.syngenio.backend.beans.Resources.create(EntityManagerFactory)
  at de.syngenio.backend.beans.Resources.create(Resources.java:0)

这是班级：

public class Resources {

    @Produces
    @ConversationScoped
    @PersistenceUnit(unitName = "mongodb-pu")
    public EntityManager create(EntityManagerFactory emf) {
        return emf.createEntityManager();
    }

    public void close(@Disposes EntityManager em) {
        em.close();
    }
}

我注入

@Inject
private EntityManager em;

我使用Glassfish 4.1和JDK build 1.8.0_25-b17

编辑：

META-INF / beans.xml（EJB项目）：

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
                               http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
           version="1.1" bean-discovery-mode="all">
    </beans>

META-INF / persistence.xml中：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="mongodb-pu" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <properties>
        <property name="eclipselink.target-database" value="org.eclipse.persistence.nosql.adapters.mongo.MongoPlatform"/>
        <property name="eclipselink.nosql.connection-spec" value="org.eclipse.persistence.nosql.adapters.mongo.MongoConnectionSpec"/>
        <property name="eclipselink.nosql.property.mongo.port" value="27017"/>
        <property name="eclipselink.nosql.property.mongo.host" value="localhost"/>
        <property name="eclipselink.nosql.property.mongo.db" value="webshop"/>
        <property name="eclipselink.logging.level" value="FINEST"/>
    </properties>
</persistence-unit>
</persistence>

Answer 1

在托管方法中使用EntityManagerFactory作为参数时，应确保EntityManagerFactory也可以注入。因为你的方法＆＃34;创造＆＃34;管理，所有参数值都以类似于@Inject的方式创建。我不知道为什么你的EntityManagerFactory不能注射，也不知道这是获得它实例的正确方法。我的建议是： 1.在create-method中以另一种方式获取EntityManagerFactory 2.或者为EntityManagerFactory编写一个生产者，创建并返回一个新的EntityManagerFactory。

CDI部署失败：使用CDI bean时的WELD-001408（Glassfish 4.1）

1 个答案: