hadoop YarnJacksonJaxbJsonProvider 源码
haddop YarnJacksonJaxbJsonProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/YarnJacksonJaxbJsonProvider.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.webapp;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Provider;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.AnnotationIntrospector;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import com.google.inject.Singleton;
/**
* YARN's implementation of JAX-RS abstractions based on
* {@link JacksonJaxbJsonProvider} needed for deserialize JSON content to or
* serialize it from POJO objects.
*/
@Singleton
@Provider
@Unstable
@Private
public class YarnJacksonJaxbJsonProvider extends JacksonJaxbJsonProvider {
public YarnJacksonJaxbJsonProvider() {
super();
}
@Override
public ObjectMapper locateMapper(Class<?> type, MediaType mediaType) {
ObjectMapper mapper = super.locateMapper(type, mediaType);
configObjectMapper(mapper);
return mapper;
}
public static void configObjectMapper(ObjectMapper mapper) {
AnnotationIntrospector introspector =
new JaxbAnnotationIntrospector(TypeFactory.defaultInstance());
mapper.setAnnotationIntrospector(introspector);
mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
}
}
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