S3 Output support

README.md

@@ -3,6 +3,8 @@
 [![Scala Steward badge](https://img.shields.io/badge/Scala_Steward-helping-blue.svg?style=flat&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA4AAAAQCAMAAAARSr4IAAAAVFBMVEUAAACHjojlOy5NWlrKzcYRKjGFjIbp293YycuLa3pYY2LSqql4f3pCUFTgSjNodYRmcXUsPD/NTTbjRS+2jomhgnzNc223cGvZS0HaSD0XLjbaSjElhIr+AAAAAXRSTlMAQObYZgAAAHlJREFUCNdNyosOwyAIhWHAQS1Vt7a77/3fcxxdmv0xwmckutAR1nkm4ggbyEcg/wWmlGLDAA3oL50xi6fk5ffZ3E2E3QfZDCcCN2YtbEWZt+Drc6u6rlqv7Uk0LdKqqr5rk2UCRXOk0vmQKGfc94nOJyQjouF9H/wCc9gECEYfONoAAAAASUVORK5CYII=)](https://scala-steward.org)
 [![Coverage Status](https://coveralls.io/repos/github/xdev-developer/gen4s/badge.svg?branch=main)](https://coveralls.io/github/xdev-developer/gen4s?branch=main)
 
+![Build status](https://github.com/xdev-developer/gen4s/actions/workflows/build.yml/badge.svg)
+
 Gen4s is a powerful data generation tool designed for developers and QA engineers. 
 
 Features:
@@ -377,6 +379,29 @@ output {
 }
 ```
 
+### AWS S3 Output
+```properties
+output {
+  writer {
+    type = s-3-output
+    bucket = "test-bucket"
+    key = "key-%s.json"
+    region = "us-east-1"
+    endpoint = "http://localhost:4566"
+    part-size-mb = 5
+  }
+  transformers = ["json-minify"]
+  validators = ["json", "missing-vars"]
+}
+```
+
+The available options for configuring an S3 output are:
+
+- `bucket`: This is the name of the S3 bucket where the output data will be written.
+- `key`:  Represents the object key pattern. The `%s` is a placeholder that will be replaced unique identifier.
+- `region`: This is the AWS region where the S3 bucket is located.
+- `endpoint`: This is the URL of the S3 service endpoint. This can be useful for testing with local S3-compatible services like LocalStack.
+- `part-size-mb`: This is used to specify the part size for multipart uploads to the S3 bucket. The value is in megabytes.
 
 #### Transformers
 

app/src/main/scala/io/gen4s/conf/OutputConfig.scala

@@ -1,5 +1,9 @@
 package io.gen4s.conf
 
+import java.net.URI
+
+import scala.util.Try
+
 import cats.implicits.*
 import io.gen4s.core.templating.{OutputTransformer, OutputValidator}
 import io.gen4s.core.Domain.BootstrapServers
@@ -11,9 +15,12 @@ import eu.timepit.refined.pureconfig.*
 import eu.timepit.refined.types.numeric.PosInt
 import eu.timepit.refined.types.string.NonEmptyString
 import pureconfig.*
+import pureconfig.error.CannotConvert
 import pureconfig.error.FailureReason
 import pureconfig.generic.derivation.default.*
 import pureconfig.module.enumeratum.*
+import software.amazon.awssdk.endpoints.Endpoint
+import software.amazon.awssdk.regions.Region
 
 given ConfigReader[Topic] = ConfigReader.fromString { value =>
   Topic(value).asRight[FailureReason]
@@ -25,6 +32,16 @@ given ConfigReader[BootstrapServers] = ConfigReader.fromString { value =>
 
 given ConfigReader[KafkaProducerConfig] = ConfigReader.derived[KafkaProducerConfig]
 
+given ConfigReader[Region] = ConfigReader.fromString { value =>
+  Region.of(value).asRight[FailureReason]
+}
+
+given ConfigReader[Endpoint] = ConfigReader.fromString { value =>
+  Try(new URI(value)).toEither
+    .map(u => Endpoint.builder().url(u).build)
+    .leftMap(e => CannotConvert(value, "Endpoint", e.getMessage))
+}
+
 final case class OutputConfig(
   writer: Output,
   transformers: Set[OutputTransformer] = Set.empty[OutputTransformer],

app/src/test/scala/io/gen4s/test/OutputLoaderTest.scala

@@ -14,6 +14,8 @@ import io.gen4s.outputs.StdOutput
 
 import eu.timepit.refined.types.numeric.PosInt
 import eu.timepit.refined.types.string.NonEmptyString
+import software.amazon.awssdk.endpoints.Endpoint
+import software.amazon.awssdk.regions.Region
 
 class OutputLoaderTest extends AsyncFreeSpec with AsyncIOSpec with Matchers {
 
@@ -119,6 +121,30 @@ class OutputLoaderTest extends AsyncFreeSpec with AsyncIOSpec with Matchers {
           )
         }
     }
+
+    "Load s3 output" in {
+      load[IO]("""
+        writer: { 
+          type: s-3-output
+          bucket: "test-bucket"
+          key: "key-%s.json"
+          region: "us-east-1"
+          endpoint: "http://localhost:4566"
+          part-size-mb: 5
+       }
+      
+       transformers = []
+       validators = []
+       """.stripMargin)
+        .asserting { out =>
+          out.writer shouldBe S3Output(
+            bucket = NonEmptyString.unsafeFrom("test-bucket"),
+            key = NonEmptyString.unsafeFrom("key-%s.json"),
+            region = Region.of("us-east-1"),
+            endpoint = Some(Endpoint.builder().url(new java.net.URI("http://localhost:4566")).build())
+          )
+        }
+    }
   }
 
 }

build.sbt

@@ -62,6 +62,7 @@ lazy val outputs = project
       Dependencies.Fs2,
       Dependencies.Fs2Kafka,
       Dependencies.Fs2Io,
+      Dependencies.Fs2S3,
       Dependencies.Sttp,
       Dependencies.ApacheCommons,
       Dependencies.Enumeratum,

outputs/src/main/scala/io/gen4s/outputs/Output.scala

@@ -10,22 +10,41 @@ import io.gen4s.core.Domain.*
 import enumeratum.EnumEntry
 import eu.timepit.refined.types.numeric.PosInt
 import eu.timepit.refined.types.string.NonEmptyString
+import fs2.aws.s3.models.Models.PartSizeMB
+import software.amazon.awssdk.endpoints.Endpoint
+import software.amazon.awssdk.regions.Region
 
 sealed trait Output {
   def description(): String
 }
 
+/**
+ * Represents the standard output.
+ */
 final case class StdOutput() extends Output {
   override def description(): String = "std-output"
 }
 
+/**
+ * Base trait for Kafka outputs.
+ */
 trait KafkaOutputBase {
   val topic: Topic
   val headers: Map[String, String]
   val batchSize: PosInt
   val decodeInputAsKeyValue: Boolean
 }
 
+/**
+ * Represents a Kafka output.
+ *
+ * @param topic                 the topic to which the data will be published.
+ * @param bootstrapServers      the bootstrap servers for the Kafka cluster.
+ * @param decodeInputAsKeyValue whether to decode the input as key-value pairs.
+ * @param headers               the headers to be included in the Kafka message.
+ * @param batchSize             the batch size for publishing messages.
+ * @param producerConfig        the configuration for the Kafka producer.
+ */
 final case class KafkaOutput(
   topic: Topic,
   bootstrapServers: BootstrapServers,
@@ -41,6 +60,15 @@ final case class KafkaOutput(
   override def description(): String = s"Kafka output: topic: $topic, bootstrap-servers: $bootstrapServers"
 }
 
+/**
+ * Represents the configuration for Avro serialization in Kafka.
+ *
+ * @param schemaRegistryUrl          The URL of the schema registry. This is where Avro schemas are stored and retrieved.
+ * @param keySchema                  An optional file that contains the Avro schema for the key of the Kafka message. If not provided, the key is assumed to be a string.
+ * @param valueSchema                An optional file that contains the Avro schema for the value of the Kafka message. If not provided, the value is assumed to be a string.
+ * @param autoRegisterSchemas        A boolean flag that indicates whether to automatically register new schemas with the schema registry. If set to false, all schemas must be pre-registered.
+ * @param registryClientMaxCacheSize The maximum number of schemas that the client will cache from the schema registry. This can help improve performance by reducing the number of requests to the schema registry.
+ */
 final case class AvroConfig(
   schemaRegistryUrl: String,
   keySchema: Option[File] = None,
@@ -49,6 +77,17 @@ final case class AvroConfig(
   registryClientMaxCacheSize: Int = 1000
 )
 
+/**
+ * Represents a Kafka output with Avro serialization.
+ *
+ * @param topic                 the topic to which the data will be published.
+ * @param bootstrapServers      the bootstrap servers for the Kafka cluster.
+ * @param avroConfig            the configuration for Avro serialization.
+ * @param decodeInputAsKeyValue whether to decode the input as key-value pairs.
+ * @param headers               the headers to be included in the Kafka message.
+ * @param batchSize             the batch size for publishing messages.
+ * @param producerConfig        the configuration for the Kafka producer.
+ */
 final case class KafkaAvroOutput(
   topic: Topic,
   bootstrapServers: BootstrapServers,
@@ -60,23 +99,54 @@ final case class KafkaAvroOutput(
     extends Output
     with KafkaOutputBase {
 
+  /**
+   * Provides the Kafka producer configuration.
+   * If no configuration is provided, it defaults to the KafkaProducerConfig.default.
+   *
+   * @return the Kafka producer configuration.
+   */
   def kafkaProducerConfig: KafkaProducerConfig = producerConfig.getOrElse(KafkaProducerConfig.default)
 
   override def description(): String = s"Kafka avro output: topic: $topic, bootstrap-servers: $bootstrapServers"
 }
 
+/**
+ * Represents the configuration for a Protobuf descriptor.
+ *
+ * @param file        The file that contains the Protobuf descriptor.
+ * @param messageType The type of the message in the Protobuf descriptor (for ex. Person).
+ */
 final case class ProtobufDescriptorConfig(
   file: File,
   messageType: String
 )
 
+/**
+ * Represents the configuration for Protobuf serialization in Kafka.
+ *
+ * @param schemaRegistryUrl          The URL of the schema registry. This is where Protobuf schemas are stored and retrieved.
+ * @param valueDescriptor            The configuration for the Protobuf descriptor.
+ * @param autoRegisterSchemas        A boolean flag that indicates whether to automatically register new schemas with the schema registry. If set to false, all schemas must be pre-registered.
+ * @param registryClientMaxCacheSize The maximum number of schemas that the client will cache from the schema registry. This can help improve performance by reducing the number of requests to the schema registry.
+ */
 final case class ProtobufConfig(
   schemaRegistryUrl: String,
   valueDescriptor: ProtobufDescriptorConfig,
   autoRegisterSchemas: Boolean = false,
   registryClientMaxCacheSize: Int = 1000
 )
 
+/**
+ * Represents a Kafka output with Protobuf serialization.
+ *
+ * @param topic                 the topic to which the data will be published.
+ * @param bootstrapServers      the bootstrap servers for the Kafka cluster.
+ * @param protoConfig           the configuration for Protobuf serialization.
+ * @param decodeInputAsKeyValue whether to decode the input as key-value pairs.
+ * @param headers               the headers to be included in the Kafka message.
+ * @param batchSize             the batch size for publishing messages.
+ * @param producerConfig        the configuration for the Kafka producer.
+ */
 final case class KafkaProtobufOutput(
   topic: Topic,
   bootstrapServers: BootstrapServers,
@@ -113,6 +183,16 @@ object HttpContentTypes extends enumeratum.Enum[HttpContentTypes] {
   case object TextXml         extends HttpContentTypes("text/xml")
 }
 
+/**
+ * Represents an HTTP output.
+ *
+ * @param url         the URL to which the data will be sent.
+ * @param method      the HTTP method to be used (POST, PUT, etc.).
+ * @param parallelism the level of parallelism for sending data. Defaults to 1.
+ * @param headers     the headers to be included in the HTTP request. Defaults to an empty map.
+ * @param contentType the content type of the HTTP request. Defaults to TextPlain.
+ * @param stopOnError a flag indicating whether to stop on error. If true, the process stops when an error occurs. Defaults to true.
+ */
 final case class HttpOutput(
   url: String,
   method: HttpMethods,
@@ -124,10 +204,31 @@ final case class HttpOutput(
   override def description(): String = s"Http output: url: $url, method: $method"
 }
 
+/**
+ * Represents a File System output.
+ *
+ * @param dir             the directory where the output file will be created.
+ * @param filenamePattern the pattern for the filename. The current system time in milliseconds is used to format the filename.
+ */
 final case class FsOutput(dir: NonEmptyString, filenamePattern: NonEmptyString) extends Output {
 
+  /**
+   * Constructs the path for the output file.
+   *
+   * @return the path of the output file.
+   */
   def path(): Path =
     Paths.get(dir.value, FilenameUtils.getName(filenamePattern.value.format(System.currentTimeMillis())))
 
   override def description(): String = s"File System output: path: ${path()}"
 }
+
+final case class S3Output(
+  bucket: NonEmptyString,
+  key: NonEmptyString,
+  region: Region,
+  endpoint: Option[Endpoint] = None,
+  partSizeMb: PartSizeMB = PartSizeMB.unsafeFrom(5))
+    extends Output {
+  override def description(): String = s"S3 output: region: $region, bucket: $bucket, key: $key"
+}

outputs/src/main/scala/io/gen4s/outputs/OutputStreamExecutor.scala

@@ -8,7 +8,8 @@ import cats.implicits.*
 import io.gen4s.core.templating.Template
 import io.gen4s.core.Domain.NumberOfSamplesToGenerate
 import io.gen4s.outputs.processors.*
-import io.gen4s.outputs.processors.kafka.{KafkaAvroOutputProcessor, KafkaOutputProcessor, KafkaProtobufOutputProcessor}
+import io.gen4s.outputs.processors.aws.S3OutputProcessor
+import io.gen4s.outputs.processors.kafka.*
 
 import fs2.io.file.Files
 
@@ -28,6 +29,13 @@ trait OutputStreamExecutor[F[_]] {
 
 object OutputStreamExecutor {
 
+  /**
+   * Factory method for creating an instance of OutputStreamExecutor.
+   *
+   * This method creates an instance of OutputStreamExecutor with a set of predefined processors for different output types.
+   *
+   * @return an instance of OutputStreamExecutor.
+   */
   def make[F[_]: Async: EffConsole: Files: Logger](): OutputStreamExecutor[F] = new OutputStreamExecutor[F] {
 
     private val stdProcessor           = new StdOutputProcessor[F]()
@@ -36,26 +44,19 @@ object OutputStreamExecutor {
     private val kafkaAvroProcessor     = new KafkaAvroOutputProcessor[F]()
     private val kafkaProtobufProcessor = new KafkaProtobufOutputProcessor[F]()
     private val httpOutputProcessor    = new HttpOutputProcessor[F]()
-
-    override def write(n: NumberOfSamplesToGenerate, flow: fs2.Stream[F, Template], output: Output): F[Unit] =
-      output match {
-        case out: StdOutput => Logger[F].info("Writing data to std-output") *> stdProcessor.process(n, flow, out)
-        case out: FsOutput  => Logger[F].info(s"Writing data file ${out.path()}") *> fsProcessor.process(n, flow, out)
-        case out: HttpOutput =>
-          Logger[F].info(s"Writing data to HTTP endpoint ${out.url}") *>
-            httpOutputProcessor.process(n, flow, out)
-
-        case out: KafkaOutput =>
-          Logger[F].info(s"Writing data to kafka brokers: ${out.bootstrapServers}, topic ${out.topic}") *>
-            kafkaProcessor.process(n, flow, out)
-
-        case out: KafkaAvroOutput =>
-          Logger[F].info(
-            s"Writing data to kafka brokers: ${out.bootstrapServers}, topic <${out.topic}>, registry: ${out.avroConfig.schemaRegistryUrl}"
-          ) *>
-            kafkaAvroProcessor.process(n, flow, out)
-
+    private val s3OutputProcessor      = new S3OutputProcessor[F]()
+
+    override def write(n: NumberOfSamplesToGenerate, flow: fs2.Stream[F, Template], output: Output): F[Unit] = {
+      val io = output match {
+        case out: StdOutput           => stdProcessor.process(n, flow, out)
+        case out: FsOutput            => fsProcessor.process(n, flow, out)
+        case out: HttpOutput          => httpOutputProcessor.process(n, flow, out)
+        case out: KafkaOutput         => kafkaProcessor.process(n, flow, out)
+        case out: KafkaAvroOutput     => kafkaAvroProcessor.process(n, flow, out)
         case out: KafkaProtobufOutput => kafkaProtobufProcessor.process(n, flow, out)
+        case out: S3Output            => s3OutputProcessor.process(n, flow, out)
       }
+      Logger[F].info(s"Writing data to ${output.description()}") *> io
+    }
   }
 }