ObjectMapperFactory.java

/**
 * Copyright 2016 Yahoo Inc.
 *
 * Licensed 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 com.yahoo.pulsar.common.util;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import io.netty.util.concurrent.FastThreadLocal;

public class ObjectMapperFactory {
    public static ObjectMapper create() {
        ObjectMapper mapper = new ObjectMapper();
        // forward compatibility for the properties may go away in the future
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.configure(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL, true);
        mapper.setSerializationInclusion(Include.NON_NULL);
        return mapper;
    }

    private static final FastThreadLocal<ObjectMapper> mapper = new FastThreadLocal<ObjectMapper>() {
        @Override
        protected ObjectMapper initialValue() throws Exception {
            return ObjectMapperFactory.create();
        }
    };

    public static ObjectMapper getThreadLocal() {
        return mapper.get();
    }

}