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* 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
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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package org.apache.samza.serializers
import com.fasterxml.jackson.core.`type`.TypeReference
import org.apache.samza.SamzaException
import org.apache.samza.config.Config
import org.apache.samza.serializers.model.SamzaObjectMapper
import org.slf4j.LoggerFactory
* A serializer for JSON strings that
* <ol>
* <li>
* returns a LinkedHashMap<String, Object> upon deserialization.
* <li>
* enforces the 'dash-separated' property naming convention.
* </ol>
* JsonSerdeV2 should be preferred over JsonSerde unless JsonSerde was already being used and backwards
* compatibility for data with the dasherized name format is required.
class JsonSerde[T] extends Serde[T] {
private val LOG = LoggerFactory.getLogger(classOf[JsonSerde[T]])
@transient lazy private val mapper = SamzaObjectMapper.getObjectMapper
def toBytes(obj: T): Array[Byte] = {
try {
} catch {
case e: Exception => throw new SamzaException(e);
def fromBytes(bytes: Array[Byte]): T = {
val str = new String(bytes, "UTF-8")
try {
mapper.readValue(str, new TypeReference[T]() {})
} catch {
case e: Exception =>
LOG.debug(s"Error deserializing message: $str", e)
throw new SamzaException(e)
class JsonSerdeFactory extends SerdeFactory[Object] {
def getSerde(name: String, config: Config) = new JsonSerde