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/*
 * Copyright 2018-2024 OVO Energy Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */

package fs2.kafka

import scala.concurrent.duration.*
import scala.concurrent.ExecutionContext

import cats.effect.Resource
import cats.Show
import fs2.kafka.security.KafkaCredentialStore

import org.apache.kafka.clients.producer.ProducerConfig

/**
  * [[ProducerSettings]] contain settings necessary to create a [[KafkaProducer]]. At the very
  * least, this includes a key serializer and a value serializer.

* * Several convenience functions are provided so that you don't have to work with `String` values * and `ProducerConfig` for configuration. It's still possible to specify `ProducerConfig` values * with functions like [[withProperty]].

* * [[ProducerSettings]] instances are immutable and all modification functions return a new * [[ProducerSettings]] instance.

* * Use `ProducerSettings#apply` to create a new instance. */ sealed abstract class ProducerSettings[F[_], K, V] { /** * The `Serializer` to use for serializing record keys. */ def keySerializer: Resource[F, KeySerializer[F, K]] /** * The `Serializer` to use for serializing record values. */ def valueSerializer: Resource[F, ValueSerializer[F, V]] /** * Replace the serializers with those provided in the arguments. */ def withSerializers[K1, V1]( keySerializer: Resource[F, KeySerializer[F, K1]], valueSerializer: Resource[F, ValueSerializer[F, V1]] ): ProducerSettings[F, K1, V1] /** * A custom [[ExecutionContext]] to use for blocking Kafka operations. If not provided, the * default blocking ExecutionContext provided by [[cats.effect.Sync]] will be used. */ def customBlockingContext: Option[ExecutionContext] /** * Returns a new [[ProducerSettings]] instance with the specified [[ExecutionContext]] to use for * blocking operations. * * If not provided, the default blocking ExecutionContext provided by [[cats.effect.Sync]] will * be used. If in doubt, leave this unset. */ def withCustomBlockingContext(ec: ExecutionContext): ProducerSettings[F, K, V] /** * Properties which can be provided when creating a Java `KafkaProducer` instance. Numerous * functions in [[ProducerSettings]] add properties here if the settings are used by the Java * `KafkaProducer`. */ def properties: Map[String, String] /** * Returns a new [[ProducerSettings]] instance with the specified bootstrap servers. This is * equivalent to setting the following property using the [[withProperty]] function. * * {{{ * ProducerConfig.BOOTSTRAP_SERVERS_CONFIG * }}} */ def withBootstrapServers(bootstrapServers: String): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified acknowledgements. This is * equivalent to setting the following property using the [[withProperty]] function, except you * can specify it with [[Acks]] instead of a `String`. * * {{{ * ProducerConfig.ACKS_CONFIG * }}} */ def withAcks(acks: Acks): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified batch size. This is equivalent * to setting the following property using the [[withProperty]] function, except you can specify * it with an `Int` instead of a `String`. * * {{{ * ProducerConfig.BATCH_SIZE_CONFIG * }}} */ def withBatchSize(batchSize: Int): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified client id. This is equivalent * to setting the following property using the [[withProperty]] function. * * {{{ * ProducerConfig.CLIENT_ID_CONFIG * }}} */ def withClientId(clientId: String): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified retries. This is equivalent to * setting the following property using the [[withProperty]] function, except you can specify it * with an `Int` instead of a `String`. * * {{{ * ProducerConfig.RETRIES_CONFIG * }}} */ def withRetries(retries: Int): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified max in-flight requests per * connection. This is equivalent to setting the following property using the [[withProperty]] * function, except you can specify it with an `Int` instead of a `String`. * * {{{ * ProducerConfig.MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION * }}} */ def withMaxInFlightRequestsPerConnection( maxInFlightRequestsPerConnection: Int ): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified idempotence setting. This is * equivalent to setting the following property using the [[withProperty]] function, except you * can specify it with a `Boolean` instead of a `String`. * * {{{ * ProducerConfig.ENABLE_IDEMPOTENCE_CONFIG * }}} */ def withEnableIdempotence(enableIdempotence: Boolean): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified linger. This is equivalent to * setting the following property using the [[withProperty]] function, except you can specify it * with a `FiniteDuration` instead of a `String`. * * {{{ * ProducerConfig.LINGER_MS_CONFIG * }}} */ def withLinger(linger: FiniteDuration): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified request timeout. This is * equivalent to setting the following property using the [[withProperty]] function, except you * can specify it with a `FiniteDuration` instead of a `String`. * * {{{ * ProducerConfig.REQUEST_TIMEOUT_MS_CONFIG * }}} */ def withRequestTimeout(requestTimeout: FiniteDuration): ProducerSettings[F, K, V] /** * Returns a new [[ProducerSettings]] instance with the specified delivery timeout. This is * equivalent to setting the following property using the [[withProperty]] function, except you * can specify it with a `FiniteDuration` instead of a `String`. * * {{{ * ProducerConfig.DELIVERY_TIMEOUT_MS_CONFIG * }}} */ def withDeliveryTimeout(deliveryTimeout: FiniteDuration): ProducerSettings[F, K, V] /** * Includes a property with the specified `key` and `value`. The key should be one of the keys in * `ProducerConfig`, and the value should be a valid choice for the key. */ def withProperty(key: String, value: String): ProducerSettings[F, K, V] /** * Includes the specified keys and values as properties. The keys should be part of the * `ProducerConfig` keys, and the values should be valid choices for the keys. */ def withProperties(properties: (String, String)*): ProducerSettings[F, K, V] /** * Includes the specified keys and values as properties. The keys should be part of the * `ProducerConfig` keys, and the values should be valid choices for the keys. */ def withProperties(properties: Map[String, String]): ProducerSettings[F, K, V] /** * The time to wait for the Java `KafkaProducer` to shutdown.

* * The default value is 60 seconds. */ def closeTimeout: FiniteDuration /** * Creates a new [[ProducerSettings]] with the specified [[closeTimeout]]. */ def withCloseTimeout(closeTimeout: FiniteDuration): ProducerSettings[F, K, V] /** * Includes the credentials properties from the provided [[KafkaCredentialStore]] */ def withCredentials(credentialsStore: KafkaCredentialStore): ProducerSettings[F, K, V] } object ProducerSettings { final private[this] case class ProducerSettingsImpl[F[_], K, V]( override val keySerializer: Resource[F, KeySerializer[F, K]], override val valueSerializer: Resource[F, ValueSerializer[F, V]], override val customBlockingContext: Option[ExecutionContext], override val properties: Map[String, String], override val closeTimeout: FiniteDuration ) extends ProducerSettings[F, K, V] { override def withCustomBlockingContext(ec: ExecutionContext): ProducerSettings[F, K, V] = copy(customBlockingContext = Some(ec)) override def withBootstrapServers(bootstrapServers: String): ProducerSettings[F, K, V] = withProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers) override def withAcks(acks: Acks): ProducerSettings[F, K, V] = withProperty( ProducerConfig.ACKS_CONFIG, acks match { case Acks.ZeroAcks => "0" case Acks.OneAcks => "1" case Acks.AllAcks => "all" } ) override def withBatchSize(batchSize: Int): ProducerSettings[F, K, V] = withProperty(ProducerConfig.BATCH_SIZE_CONFIG, batchSize.toString) override def withClientId(clientId: String): ProducerSettings[F, K, V] = withProperty(ProducerConfig.CLIENT_ID_CONFIG, clientId) override def withRetries(retries: Int): ProducerSettings[F, K, V] = withProperty(ProducerConfig.RETRIES_CONFIG, retries.toString) override def withMaxInFlightRequestsPerConnection( maxInFlightRequestsPerConnection: Int ): ProducerSettings[F, K, V] = withProperty( ProducerConfig.MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION, maxInFlightRequestsPerConnection.toString ) override def withEnableIdempotence(enableIdempotence: Boolean): ProducerSettings[F, K, V] = withProperty(ProducerConfig.ENABLE_IDEMPOTENCE_CONFIG, enableIdempotence.toString) override def withLinger(linger: FiniteDuration): ProducerSettings[F, K, V] = withProperty(ProducerConfig.LINGER_MS_CONFIG, linger.toMillis.toString) override def withRequestTimeout(requestTimeout: FiniteDuration): ProducerSettings[F, K, V] = withProperty(ProducerConfig.REQUEST_TIMEOUT_MS_CONFIG, requestTimeout.toMillis.toString) override def withDeliveryTimeout(deliveryTimeout: FiniteDuration): ProducerSettings[F, K, V] = withProperty(ProducerConfig.DELIVERY_TIMEOUT_MS_CONFIG, deliveryTimeout.toMillis.toString) override def withProperty(key: String, value: String): ProducerSettings[F, K, V] = copy(properties = properties.updated(key, value)) override def withProperties(properties: (String, String)*): ProducerSettings[F, K, V] = copy(properties = this.properties ++ properties.toMap) override def withProperties(properties: Map[String, String]): ProducerSettings[F, K, V] = copy(properties = this.properties ++ properties) override def withCloseTimeout(closeTimeout: FiniteDuration): ProducerSettings[F, K, V] = copy(closeTimeout = closeTimeout) /** * Includes the credentials properties from the provided [[KafkaCredentialStore]] */ override def withCredentials( credentialsStore: KafkaCredentialStore ): ProducerSettings[F, K, V] = withProperties(credentialsStore.properties) override def toString: String = s"ProducerSettings(closeTimeout = $closeTimeout)" override def withSerializers[K1, V1]( keySerializer: Resource[F, KeySerializer[F, K1]], valueSerializer: Resource[F, ValueSerializer[F, V1]] ): ProducerSettings[F, K1, V1] = copy(keySerializer = keySerializer, valueSerializer = valueSerializer) } private[this] def create[F[_], K, V]( keySerializer: Resource[F, KeySerializer[F, K]], valueSerializer: Resource[F, ValueSerializer[F, V]] ): ProducerSettings[F, K, V] = ProducerSettingsImpl( keySerializer = keySerializer, valueSerializer = valueSerializer, customBlockingContext = None, properties = Map( ProducerConfig.RETRIES_CONFIG -> "0" ), closeTimeout = 60.seconds ) def apply[F[_], K, V]( keySerializer: KeySerializer[F, K], valueSerializer: ValueSerializer[F, V] ): ProducerSettings[F, K, V] = create( keySerializer = Resource.pure(keySerializer), valueSerializer = Resource.pure(valueSerializer) ) def apply[F[_], K, V]( keySerializer: Resource[F, KeySerializer[F, K]], valueSerializer: ValueSerializer[F, V] ): ProducerSettings[F, K, V] = create( keySerializer = keySerializer, valueSerializer = Resource.pure(valueSerializer) ) def apply[F[_], K, V]( keySerializer: KeySerializer[F, K], valueSerializer: Resource[F, ValueSerializer[F, V]] ): ProducerSettings[F, K, V] = create( keySerializer = Resource.pure(keySerializer), valueSerializer = valueSerializer ) def apply[F[_], K, V](implicit keySerializer: Resource[F, KeySerializer[F, K]], valueSerializer: Resource[F, ValueSerializer[F, V]] ): ProducerSettings[F, K, V] = create(keySerializer, valueSerializer) implicit def producerSettingsShow[F[_], K, V]: Show[ProducerSettings[F, K, V]] = Show.fromToString }




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