com.ebiznext.comet.schema.model.Engine.scala Maven / Gradle / Ivy
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*
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* * this work for additional information regarding copyright ownership.
* * The ASF licenses this file to You under the Apache License, Version 2.0
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* * 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
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package com.ebiznext.comet.schema.model
import com.fasterxml.jackson.core.{JsonGenerator, JsonParser}
import com.fasterxml.jackson.databind.annotation.{JsonDeserialize, JsonSerialize}
import com.fasterxml.jackson.databind.{
DeserializationContext,
JsonDeserializer,
JsonSerializer,
SerializerProvider
}
/** Big versus Fast data ingestion. Are we ingesting a file or a message stream ?
* @param value : FILE or STREAM
*/
@JsonSerialize(using = classOf[EngineSerializer])
@JsonDeserialize(using = classOf[EngineDeserializer])
sealed case class Engine(value: String) {
override def toString: String = value
}
object Engine {
def fromString(value: String): Engine = {
value.toUpperCase() match {
case "BQ" => Engine.BQ
case "SPARK" => Engine.SPARK
}
}
object BQ extends Engine("BQ")
object SPARK extends Engine("SPARK")
val engines: Set[Engine] = Set(BQ, SPARK)
}
class EngineDeserializer extends JsonDeserializer[Engine] {
override def deserialize(jp: JsonParser, ctx: DeserializationContext): Engine = {
val value = jp.readValueAs[String](classOf[String])
Engine.fromString(value)
}
}
final class EngineSerializer extends JsonSerializer[Engine] {
override def serialize(
value: Engine,
gen: JsonGenerator,
serializers: SerializerProvider
): Unit = {
val strValue = value.toString
gen.writeString(strValue)
}
}