使用Aries Felix,Aries Blueprint和CXF-RS时,_locateMapperViaProvider是否起作用?

时间:2019-04-17 16:14:17

标签: cxf apache-felix blueprint-osgi

为什么@Provider注释不起作用? (目标是将模块附加到ObjectMapper单例)

根据JavaDocs

  

默认构造函数,通常在将提供者自动配置为与JAX-RS实现一起使用时使用。

当使用空构造函数调用JacksonJsonProvider时,

public JacksonJsonProvider() {
        this((ObjectMapper)null, BASIC_ANNOTATIONS);
    }

ObjectMapper仅设置为null。 BASIC_ANNOTATIONS可能包含@Provider

在Blueprint将类初始化到内存中之后,一定有可能设置ObjectMapper。

所以我有两个选择:

  • 向JacksonJsonProvider的构造函数中注入一些内容,以便ObjectMapper在初始化时具有所有已注册的模块。
  • “解析” JacksonJsonProvider的ObjectMapper实例,并在初始化后不久注册模块。

看起来

protected ObjectMapper _locateMapperViaProvider

蓝图

<cxf:rsServer id="cxfConsumer" address="/" serviceClass="com.domain.MyServiceInterface">
     <cxf:providers>
         <ref component-id="jsonProvider"/>
    </cxf:providers>
 </cxf:rsServer>
 <bean id="jsonProvider" class="com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider">

我的@Provider类

@Provider
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class JacksonObjectMapperProvider implements ContextResolver<ObjectMapper> {

    final ObjectMapper defaultObjectMapper;

    public JacksonObjectMapperProvider() {
        this.defaultObjectMapper = makeObjectMapper();
    }

    @Override
    public ObjectMapper getContext(Class<?> type) {
        return defaultObjectMapper;
    }

    private static ObjectMapper makeObjectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new MyObjectSerializerModule());
        return mapper;
    }
}

我的序列化器

public class MyObjectSerializerModule extends SimpleModule {

    public MyObjectSerializerModule() {
        super("ObjectIdSerializerModule", new Version(1, 0, 0, "alpha"));
        this.addSerializer(MyObject.class, new MyObjectSerializer());
    }

    public class MyObjectSerializer extends JsonSerializer<Location> {

        @Override
        public void serialize(MyObject value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
                throws IOException {

            jsonGenerator.writeStartObject();
            jsonGenerator.writeStringField("id", value.getId());
            jsonGenerator.writeEndObject();
        }
    }
}

1 个答案:

答案 0 :(得分:0)

看来答案是“不,先生”。

就我所知,@Provider注释不起作用。在初始化期间,必须在CXF中注入/注册提供程序。我欢迎您提出其他答案。

<cxf:rsServer id="cxfConsumer" address="/" serviceClass="com.domain.MyServiceInterface">
     <cxf:providers>
         <ref component-id="jsonProvider"/>
         <ref component-id="JacksonObjectMapperContextProvider"/>
    </cxf:providers>
 </cxf:rsServer>
 <bean id="jsonProvider" class="com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider">
<bean id="jsonProvider" class="JacksonObjectMapperContextProvider">