spark KafkaRDDPartition 源码
spark KafkaRDDPartition 代码
文件路径：/connector/kafka-0-10/src/main/scala/org/apache/spark/streaming/kafka010/KafkaRDDPartition.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.
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package org.apache.spark.streaming.kafka010
import org.apache.kafka.common.TopicPartition
import org.apache.spark.Partition
/**
* @param topic kafka topic name
* @param partition kafka partition id
* @param fromOffset inclusive starting offset
* @param untilOffset exclusive ending offset
*/
private[kafka010]
class KafkaRDDPartition(
val index: Int,
val topic: String,
val partition: Int,
val fromOffset: Long,
val untilOffset: Long
) extends Partition {
/** Number of messages this partition refers to */
def count(): Long = untilOffset - fromOffset
/** Kafka TopicPartition object, for convenience */
def topicPartition(): TopicPartition = new TopicPartition(topic, partition)
}
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