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JSONSerde.scala
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JSONSerde.scala
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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
*
* 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.codefeedr.buffer.serialization
import java.lang
import java.nio.charset.StandardCharsets
import org.apache.kafka.clients.producer.ProducerRecord
import org.json4s.NoTypeHints
import org.json4s.ext.JavaTimeSerializers
import org.json4s.jackson.Serialization
import scala.reflect.ClassTag
import scala.reflect.runtime.universe._
/** JSON (de-)serializer
*
* @tparam T Type of the SerDe.
*/
class JSONSerde[T <: Serializable with AnyRef: TypeTag: ClassTag](
topic: String = "")
extends AbstractSerde[T](topic) {
// Implicitly and lazily define the serialization to JSON.
implicit lazy val formats = Serialization.formats(NoTypeHints) ++ JavaTimeSerializers.all
/** Serializes a (generic) element into a json format.
*
* @param element The element to serialized.
* @return A serialized byte array.
*/
override def serialize(element: T): Array[Byte] = {
val string = Serialization.write(element)(formats)
string.getBytes(StandardCharsets.UTF_8)
}
/** Deserializes a (JSON) message into a (generic) case class
*
* @param message The message to deserialized.
* @return A deserialized case class.
*/
override def deserialize(message: Array[Byte]): T = {
Serialization.read[T](new String(message, StandardCharsets.UTF_8))
}
/** Serialize as Kafka Producer Record.
* @return ProducerRecord.
*/
override def serialize(
element: T,
timestamp: lang.Long): ProducerRecord[Array[Byte], Array[Byte]] = {
new ProducerRecord(topic, serialize(element))
}
}
/** Companion object to simply instantiation of a JSONSerde. */
object JSONSerde {
/** Creates new JSON Serde. */
def apply[T <: Serializable with AnyRef: ClassTag: TypeTag](
topic: String = ""): JSONSerde[T] =
new JSONSerde[T](topic)
}