org.apache.james.rate.limiter.redis.RedisRateLimiterConfiguration.scala Maven / Gradle / Ivy

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package org.apache.james.rate.limiter.redis

import com.google.common.base.Preconditions
import eu.timepit.refined
import eu.timepit.refined.api.Refined
import eu.timepit.refined.collection.NonEmpty
import io.lettuce.core.RedisURI
import org.apache.commons.configuration2.Configuration
import org.apache.james.rate.limiter.redis.RedisUris.RedisUris

object RedisRateLimiterConfiguration {
  val CLUSTER_ENABLED_DEFAULT = false

  def from(config: Configuration): RedisRateLimiterConfiguration =
    from(config.getString("redisURL"),
      config.getBoolean("cluster.enabled", CLUSTER_ENABLED_DEFAULT),
      Option(config.getInteger("redis.ioThreads", null)).map(Integer2int),
      Option(config.getInteger("redis.workerThreads", null)).map(Integer2int))

  def from(redisUri: String, isCluster: Boolean, ioThreads: Option[Int], workerThreads:Option[Int]): RedisRateLimiterConfiguration = {
    Preconditions.checkArgument(redisUri != null && !redisUri.isBlank)
    Preconditions.checkNotNull(isCluster)
    RedisRateLimiterConfiguration(RedisUris.from(redisUri), isCluster, ioThreads, workerThreads)
  }

  def from(redisUri: String, isCluster: Boolean): RedisRateLimiterConfiguration = from(redisUri, isCluster, None, None)
}

object RedisUris {
  type RedisUrisConstraint = NonEmpty
  type RedisUris = List[RedisURI] Refined RedisUrisConstraint

  def validate(value: List[RedisURI]): Either[IllegalArgumentException, RedisUris] =
    refined.refineV[RedisUrisConstraint](value) match {
      case Right(value) => Right(value)
      case Left(error) => Left(new IllegalArgumentException(error))
    }

  def liftOrThrow(value: List[RedisURI]): RedisUris =
    validate(value) match {
      case Right(value) => value
      case Left(error) => throw error
    }

  def from(value: String): RedisUris = liftOrThrow(value.split(',').toList.map(RedisURI.create))
}

case class RedisRateLimiterConfiguration(redisURI: RedisUris, isCluster: Boolean, ioThreads: Option[Int], workerThreads:Option[Int])