core/src/main/scala/kafka/server/QuotaFactory.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,
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  * See the License for the specific language governing permissions and
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package kafka.server

import kafka.server.QuotaType._
import org.apache.kafka.common.TopicPartition
import org.apache.kafka.common.metrics.Metrics
import org.apache.kafka.common.utils.Time

object QuotaType  {
  case object Fetch extends QuotaType
  case object Produce extends QuotaType
  case object LeaderReplication extends QuotaType
  case object FollowerReplication extends QuotaType
}
sealed trait QuotaType

object QuotaFactory {

  object UnboundedQuota extends ReplicaQuota {
    override def isThrottled(topicPartition: TopicPartition): Boolean = false
    override def isQuotaExceeded(): Boolean = false
  }

  case class QuotaManagers(fetch: ClientQuotaManager, produce: ClientQuotaManager, leader: ReplicationQuotaManager, follower: ReplicationQuotaManager) {
    def shutdown() {
      fetch.shutdown
      produce.shutdown
    }
  }

  def instantiate(cfg: KafkaConfig, metrics: Metrics, time: Time): QuotaManagers = {
    QuotaManagers(
      new ClientQuotaManager(clientFetchConfig(cfg), metrics, Fetch, time),
      new ClientQuotaManager(clientProduceConfig(cfg), metrics, Produce, time),
      new ReplicationQuotaManager(replicationConfig(cfg), metrics, LeaderReplication, time),
      new ReplicationQuotaManager(replicationConfig(cfg), metrics, FollowerReplication, time)
    )
  }

  def clientProduceConfig(cfg: KafkaConfig): ClientQuotaManagerConfig =
    ClientQuotaManagerConfig(
      quotaBytesPerSecondDefault = cfg.producerQuotaBytesPerSecondDefault,
      numQuotaSamples = cfg.numQuotaSamples,
      quotaWindowSizeSeconds = cfg.quotaWindowSizeSeconds
    )

  def clientFetchConfig(cfg: KafkaConfig): ClientQuotaManagerConfig =
    ClientQuotaManagerConfig(
      quotaBytesPerSecondDefault = cfg.consumerQuotaBytesPerSecondDefault,
      numQuotaSamples = cfg.numQuotaSamples,
      quotaWindowSizeSeconds = cfg.quotaWindowSizeSeconds
    )

  def replicationConfig(cfg: KafkaConfig): ReplicationQuotaManagerConfig =
    ReplicationQuotaManagerConfig(
      numQuotaSamples = cfg.numReplicationQuotaSamples,
      quotaWindowSizeSeconds = cfg.replicationQuotaWindowSizeSeconds
    )
}