我如何使HK2 ServiceLocator使用它桥接的ServiceLocator中的单例服务实例？

Question

我们正在使用usingextrasUtilities.bridgeServiceLocator()通过将app ServiceLocator桥接到Jersey ServiceLocator中，将在一个ServiceLocator中创建的现有单例应用程序服务注入到Jersey RESTful Web服务中。

然而，存在于“外部”定位器中的单例并没有被使用--每个服务都是在注入到Jersey服务中时再次创建的。单例似乎只在ServiceLocator的范围内可见，即使它是桥接的。

我已经将这个问题提取到一组测试类中，这些测试类说明了下面的观点：

public class BridgedServiceTest
{
  private ServiceLocator _outerServiceLocator;
  private ServiceLocator _innerServiceLocator;

  @Test
  public void testBridgedInnerServiceOK() throws Exception
  {
    ServiceLocatorFactory serviceLocatorFactory = ServiceLocatorFactory.getInstance();

    _outerServiceLocator = serviceLocatorFactory.create("Outer");
    ServiceLocatorUtilities.addClasses(_outerServiceLocator, SingletonServiceImpl.class);

    _innerServiceLocator = serviceLocatorFactory.create("Inner");
    ExtrasUtilities.bridgeServiceLocator(_innerServiceLocator, _outerServiceLocator);

    final Client client1 = new Client();
    _outerServiceLocator.inject(client1);
    assertThat(SingletonServiceImpl.instanceCount.get(), Matchers.is(1));
    client1.test();

    final Client client2 = new Client();
    _innerServiceLocator.inject(client2);
    // next line fails as instance count is 2
    assertThat(SingletonServiceImpl.instanceCount.get(), Matchers.is(1));
    client2.test();
  }

  @After
  public void tearDown() throws Exception
  {
    _innerServiceLocator.shutdown();
    _outerServiceLocator.shutdown();
  }
}

@Contract
public interface SingletonService
{
  void fulfil();
}

@Service
public class SingletonServiceImpl implements SingletonService
{
  public static AtomicInteger instanceCount = new AtomicInteger();

  @PostConstruct
  public void postConstruct()
  {
    instanceCount.incrementAndGet();
  }

  @Override
  public void fulfil()
  {
    System.out.println("Contract Fulfilled.");
  }
}

public class Client
{
  @Inject
  private SingletonService _singletonService;

  public void test()
  {
    _singletonService.fulfil();
  }

  public SingletonService getSingletonService()
  {
    return _singletonService;
  }
}

Answer 1

ServiceLocator桥接器中存在一个已修复的错误。修复将在hk2 2.5.0-B07或更高版本！