相关疑难解决方法(0)

我已经设法在Jersey,HK2和一个简单的GrizzlyServer中设置我自己的服务类的注入(进入资源类).(基本上遵循这个例子.)

我现在好奇将JPA EntityManagers注入我的资源类最好的是什么？(我目前正在考虑将一个请求作为一个工作单元).我目前正在探索的一个选项是以Factory<EntityManager>下列方式使用a :

class MyEntityManagerFactory implements Factory<EntityManager> {

    EntityManagerFactory emf;

    public MyEntityManagerFactory() {
        emf = Persistence.createEntityManagerFactory("manager1");
    }

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

    @Override
    public EntityManager provide() {
        return emf.createEntityManager();
    }

}

并按如下方式绑定它:

bindFactory(new MyEntityManagerFactory())
        .to(EntityManager.class)
        .in(RequestScoped.class);

问题是dispose从不调用-method.

我的问题:

1. 这是在Jersey + HK2中注入EntityManagers的正确方法吗？
2. 如果是这样,我该如何确保我的EntityManagers正确关闭？

(我宁愿不依赖于重量级容器或额外的依赖注入库来覆盖这个用例.)

我有一个使用JPA持久性的jersey-2/hk2应用程序.将EntityManager在这样的约束启动

public MyApplication() {
    // ...
    register(new AbstractBinder() {
        @Override
        public void configure() {
          bindFactory(EmFactory.class)
            .to(EntityManager.class)
            .in(RequestScoped.class);
        }
    });
}

与工厂类一样

public class EmFactory implements Factory<EntityManager> {

    private static final String PERSISTENCE_UNIT = "unit";

    private EntityManagerFactory emf;
    private CloseableService closeableService;

    @Inject
    public EmFactory(@Named(PERSISTENCE_UNIT) String persistenceUnit,
            CloseableService closeableService) {
        emf = Persistence.createEntityManagerFactory(persistenceUnit);
        this.closeableService = closeableService;
    }

    @Override
    public EntityManager provide() {
        final EntityManager entityManager = emf.createEntityManager();
        closeableService.add(new Closeable() {

            @Override
            public void close() throws IOException {
                if(entityManager.isOpen()) {
                    entityManager.close(); …

对于我的生活,我无法通过hk2获得Jersey来自动发现@Service注释类并注入它们.我试图遵循堆栈溢出,泽西和hk2文档的每一个建议,仍然没有运气.我试图将一个简单的echo服务注入Jersey资源.骨架是从Jersey的简单webapp maven原型生成的,我试图扩展它.这是我到目前为止:

的pom.xml

<build>
  <finalName>sandbox</finalName>
  <plugins>
    <plugin>
      <groupId>org.glassfish.hk2</groupId>
      <artifactId>hk2-inhabitant-generator</artifactId>
      <version>2.3.0</version>
      <executions>
        <execution>
          <configuration>
            <verbose>true</verbose>
          </configuration>
          <goals>
            <goal>generate-inhabitants</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>
...
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>org.glassfish.jersey</groupId>
      <artifactId>jersey-bom</artifactId>
      <version>${jersey.version}</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
  </dependency>
  <dependency>
    <groupId>org.glassfish.hk2</groupId>
    <artifactId>hk2</artifactId>
    <version>2.3.0</version>
  </dependency>
</dependencies>

web.xml中

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>my.package.jerseytest</param-value>
    </init-param>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>my.package.jerseytest.application.Application</param-value>
    </init-param>    

    <load-on-startup>1</load-on-startup>
</servlet>

my.package.jerseytest.application.Application

public class Application extends ResourceConfig {
    public Application() {
        ServiceLocator locator = ServiceLocatorUtilities.createAndPopulateServiceLocator();
    }
}

my.package.jerseytest.service.EchoService

@Service …