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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.apache.spark.sql.kafka010
import org.apache.kafka.common.TopicPartition
import org.apache.spark.sql.execution.streaming.Offset
/**
* An [[Offset]] for the [[KafkaSource]]. This one tracks all partitions of subscribed topics and
* their offsets.
*/
private[kafka010]
case class KafkaSourceOffset(partitionToOffsets: Map[TopicPartition, Long]) extends Offset {
override def toString(): String = {
partitionToOffsets.toSeq.sortBy(_._1.toString).mkString("[", ", ", "]")
}
}
/** Companion object of the [[KafkaSourceOffset]] */
private[kafka010] object KafkaSourceOffset {
def getPartitionOffsets(offset: Offset): Map[TopicPartition, Long] = {
offset match {
case o: KafkaSourceOffset => o.partitionToOffsets
case _ =>
throw new IllegalArgumentException(
s"Invalid conversion from offset of ${offset.getClass} to KafkaSourceOffset")
}
}
/**
* Returns [[KafkaSourceOffset]] from a variable sequence of (topic, partitionId, offset)
* tuples.
*/
def apply(offsetTuples: (String, Int, Long)*): KafkaSourceOffset = {
KafkaSourceOffset(offsetTuples.map { case(t, p, o) => (new TopicPartition(t, p), o) }.toMap)
}
}
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