spark PerPartitionConfig 源码
spark PerPartitionConfig 代码
文件路径：/connector/kafka-0-10/src/main/scala/org/apache/spark/streaming/kafka010/PerPartitionConfig.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.
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package org.apache.spark.streaming.kafka010
import org.apache.kafka.common.TopicPartition
import org.apache.spark.SparkConf
/**
* Interface for user-supplied configurations that can't otherwise be set via Spark properties,
* because they need tweaking on a per-partition basis,
*/
abstract class PerPartitionConfig extends Serializable {
/**
* Maximum rate (number of records per second) at which data will be read
* from each Kafka partition.
*/
def maxRatePerPartition(topicPartition: TopicPartition): Long
def minRatePerPartition(topicPartition: TopicPartition): Long = 1
}
/**
* Default per-partition configuration
*/
private class DefaultPerPartitionConfig(conf: SparkConf)
extends PerPartitionConfig {
val maxRate = conf.get(MAX_RATE_PER_PARTITION)
val minRate = conf.get(MIN_RATE_PER_PARTITION)
def maxRatePerPartition(topicPartition: TopicPartition): Long = maxRate
override def minRatePerPartition(topicPartition: TopicPartition): Long = minRate
}
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