泽西岛：如何使用自定义的“ExceptionMapperFactory”

Question

我需要使用自定义 ExceptionMapperFactory 来实现自定义 find() 逻辑。

public class MyExceptionMapperFactory extends ExceptionMapperFactory {

    // [...]

    @Override
    public <T extends Throwable> ExceptionMapper<T> find(Class<T> type) {
         // [...]
    }
}

我怎样才能use/register呢？

在我的 RestApplication 中注册它没有效果：

public class RestApplication extends ResourceConfig {

    public RestApplication() {
        register(JacksonFeature.class);
        register(JacksonXMLProvider.class);

        register(MyExceptionMapperFactory.class);
        register(SomeExceptionMapper.class, 600);
        register(OtherExceptionMapper.class, 550);

        // [...]
     }
}

有什么想法吗？ TIA！

Answer 1

我从来没有实现过这个，所以我不知道所有的细微差别，但简要地看一下 source and the tests, it looks like you just need to hook it up to the DI system

register(new AbstractBinder() {
    @Override
    public void configure() {
        bindAsContract(MyExceptionMapperFactory.class)
                .to(ExceptionMappers.class)
                .in(Singleton.class);
    }
})

不确定如何禁用原始的，但如果它仍在使用，您可以尝试 set a rank 为您的工厂，这样当它被查找时，您的将优先

bindAsContract(MyExceptionMapperFactory.class)
        .to(ExceptionMappers.class)
        .ranked(Integer.MAX_VALUE)
        .in(Singleton.class);

更新

下面好像把原厂去掉了，排名不行

@Provider
public class ExceptionMapperFactoryFeature implements Feature {

    @Override
    public boolean configure(FeatureContext context) {
        final ServiceLocator locator = ServiceLocatorProvider.getServiceLocator(context);
        final Descriptor<?> descriptor = locator.getBestDescriptor(new Filter() {
            @Override
            public boolean matches(Descriptor d) {
                return d.getImplementation().equals(ExceptionMapperFactory.class.getName());
            } 
        });
        ServiceLocatorUtilities.removeOneDescriptor(locator, descriptor);

        context.register(new AbstractBinder() {
            @Override
            public void configure() {
                bindAsContract(MyExceptionMapperFactory.class)
                        .to(ExceptionMappers.class)
                        .in(Singleton.class);
            }
        });
        return true;
    }
}

泽西岛：如何使用自定义的“ExceptionMapperFactory”

Jersey: How to use a custom `ExceptionMapperFactory`

java

jersey

jersey-2.0

更新