spark SerializedOffset 源码
spark SerializedOffset 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/SerializedOffset.scala
/*
* 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
/**
* Used when loading a JSON serialized offset from external storage.
* We are currently not responsible for converting JSON serialized
* data into an internal (i.e., object) representation. Sources should
* define a factory method in their source Offset companion objects
* that accepts a [[SerializedOffset]] for doing the conversion.
*/
case class SerializedOffset(override val json: String) extends Offset
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