org.apache.spark.sql.execution.streaming.FileStreamSourceOffset.scala Maven / Gradle / Ivy
/*
* 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.spark.sql.execution.streaming
import scala.util.control.Exception._
import org.json4s.NoTypeHints
import org.json4s.jackson.Serialization
/**
* Offset for the [[FileStreamSource]].
*
* @param logOffset Position in the [[FileStreamSourceLog]]
*/
case class FileStreamSourceOffset(logOffset: Long) extends Offset {
override def json: String = {
Serialization.write(this)(FileStreamSourceOffset.format)
}
}
object FileStreamSourceOffset {
implicit val format = Serialization.formats(NoTypeHints)
def apply(offset: Offset): FileStreamSourceOffset = {
offset match {
case f: FileStreamSourceOffset => f
case SerializedOffset(str) =>
catching(classOf[NumberFormatException]).opt {
FileStreamSourceOffset(str.toLong)
}.getOrElse {
Serialization.read[FileStreamSourceOffset](str)
}
case _ =>
throw new IllegalArgumentException(
s"Invalid conversion from offset of ${offset.getClass} to FileStreamSourceOffset")
}
}
}