我正在按照this advice将EntityManager
注入我的Jersey + HK2项目。由于某种原因,启动服务时突然看到此异常:
线程“主”中的异常java.lang.IllegalArgumentException:创建FactoryDescriptor时必须将Factory作为第一个参数的协定
在org.glassfish.hk2.utilities.FactoryDescriptorsImpl。(FactoryDescriptorsImpl.java:78)
在org.glassfish.hk2.utilities.binding.AbstractBindingBuilder $ FactoryTypeBasedBindingBuilder.complete(AbstractBindingBuilder.java:453)
在org.glassfish.hk2.utilities.binding.AbstractBinder.resetBuilder(AbstractBinder.java:180)
在org.glassfish.hk2.utilities.binding.AbstractBinder.complete(AbstractBinder.java:190)
在org.glassfish.hk2.utilities.binding.AbstractBinder.bind(AbstractBinder.java:174)
在org.glassfish.hk2.utilities.ServiceLocatorUtilities.bind(ServiceLocatorUtilities.java:187)
....
这是我的代码:
EMF工厂
public class EMFFactory implements Factory<EntityManagerFactory> {
private final Logger log = LoggerFactory.getLogger(EMFFactory.class);
protected EntityManagerFactory emf;
@Inject
Config config;
@PostConstruct
public void setup() {
Properties p = new Properties();
p.put("javax.persistence.jdbc.url", config.getJdbcUrl());
p.put("javax.persistence.jdbc.user", config.getJdbcUser());
p.put("javax.persistence.jdbc.password", config.getJdbcPassword());
emf = Persistence.createEntityManagerFactory("skp-server-PU", p);
log.debug("JDBC URL: "+ config.getJdbcUrl());
}
@Override
public EntityManagerFactory provide() {
return emf;
}
@Override
public void dispose(EntityManagerFactory instance) {}
}
EM工厂
public class EMFactory implements Factory<EntityManager> {
private final Logger log = LoggerFactory.getLogger(EMFFactory.class);
private EntityManager em;
@Inject
EntityManagerFactory emf;
@PostConstruct
public void setup() {
em = emf.createEntityManager();
log.debug("New EntityManager created");
}
@Override
public EntityManager provide() {
return em;
}
@Override
public void dispose(EntityManager instance) {
log.debug("Disposing of EntityManager");
}
}
ApplicationConfig
绑定工厂: ServiceLocatorUtilities.bind(applicationLocator, new AbstractBinder() {
@Override
protected void configure() {
bindFactory(EMFFactory.class)
.to(EntityManagerFactory.class)
.in(Singleton.class);
bindFactory(EMFactory.class)
.to(EntityManager.class);
}
});
有人可以解释例外情况吗?
最佳答案
不知道它是否会帮助任何人,但是我发现我是如何打破它的:
我正在使用Maven Shade插件创建一个着色的uber-jar。该插件抱怨类重叠,因此我从阴影中排除了以下软件包:
<!-- This one comes with epcliselink, but I don't want shaded, hence the scope -->
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.1.0</version>
<scope>provided</scope>
</dependency>
我的朋友们,那不是一个好主意。删除该部分解决了问题。
关于java - Jersey + HK2:EntityManager注入(inject)失败,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/38901159/