JsonPOJOSerializer.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.kafka.streams.examples.pageview;


import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.kafka.common.errors.SerializationException;
import org.apache.kafka.common.serialization.Serializer;

import java.util.Map;

public class JsonPOJOSerializer<T> implements Serializer<T> {
    private final ObjectMapper objectMapper = new ObjectMapper();

    /**
     * Default constructor needed by Kafka
     */
    public JsonPOJOSerializer() {
    }
    
    @Override
    public void configure(Map<String, ?> props, boolean isKey) {
    }

    @Override
    public byte[] serialize(String topic, T data) {
        if (data == null)
            return null;

        try {
            return objectMapper.writeValueAsBytes(data);
        } catch (Exception e) {
            throw new SerializationException("Error serializing JSON message", e);
        }
    }

    @Override
    public void close() {
    }

}