Initial import

Author: amohrland

.gitignore

@@ -0,0 +1,10 @@
+target/
+.idea/
+# vim
+*.sw?
+
+# Ignore [ce]tags files
+tags
+
+.bloop
+.metals

CHANGELOG.md

@@ -0,0 +1 @@
+# changelog

CODE_OF_CONDUCT.md

@@ -0,0 +1,14 @@
+# Code of Conduct
+
+We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, nationality, or other such characteristics.
+
+Everyone is expected to follow the [Scala Code of Conduct] when discussing the project on the available communication channels. If you are being harassed, please contact us immediately so that we can support you.
+
+## Moderation
+
+Any questions, concerns, or moderation requests please contact a member of the project.
+
+- [Zach Cox](mailto:[email protected])
+- [Andrew Mohrland](mailto:[email protected])
+
+[Scala Code of Conduct]: https://www.scala-lang.org/conduct/

LICENSE

@@ -198,4 +198,4 @@
    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.
+   limitations under the License.

NOTICE

@@ -0,0 +1,3 @@
+kafka4s
+Copyright 2019 Jack Henry & Associates, Inc.®
+Licensed under Apache License 2.0 (see LICENSE)

README.md

@@ -1,2 +1,14 @@
-# kafka4s
-Functional programming with Kafka and Scala.
+# kafka4s - Functional programming with Kafka and Scala [![Build Status](https://travis-ci.com/banno/kafka4s.svg?branch=master)](https://travis-ci.com/banno/kafka4s) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.banno/kafka4s_2.12/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.banno/kafka4s_2.12) ![Code of Conduct](https://img.shields.io/badge/Code%20of%20Conduct-Scala-blue.svg)
+
+## [Head on over to the microsite](https://banno.github.io/kafka4s)
+
+## Quick Start
+
+To use kafka4s in an existing SBT project with Scala 2.12 or a later version, add the following dependencies to your
+`build.sbt` depending on your needs:
+
+```scala
+libraryDependencies ++= Seq(
+  "com.banno" %% "kafka4s" % "<version>"
+)
+```

build.sbt

@@ -0,0 +1,250 @@
+lazy val kafka4s = project.in(file("."))
+  .settings(commonSettings, releaseSettings, skipOnPublishSettings)
+  .aggregate(core, docs)
+
+lazy val core = project
+  .settings(commonSettings, releaseSettings, mimaSettings)
+  .settings(
+    name := "kafka4s"
+  )
+
+lazy val docs = project
+  .settings(commonSettings, skipOnPublishSettings, micrositeSettings)
+  .dependsOn(core)
+  .enablePlugins(MicrositesPlugin)
+  .enablePlugins(TutPlugin)
+
+lazy val contributors = Seq(
+  "amohrland" -> "Andrew Mohrland",
+  "zcox"      -> "Zach Cox",
+)
+
+lazy val V = new {
+  val scala_2_12 = "2.12.8"
+  val cats = "1.6.1"
+  val fs2 = "1.0.5"
+  val kafka = "2.2.1"
+  val confluent = "5.2.2"
+  val avro4s = "1.8.4"
+  val log4cats = "0.3.0"
+}
+
+lazy val commonSettings = Seq(
+  organization := "com.banno",
+  scalaVersion := V.scala_2_12,
+  crossScalaVersions := Seq(V.scala_2_12),
+
+  publishArtifact in ThisBuild := true,
+
+  cancelable in Global := true,
+
+  scalacOptions ++= Seq(
+    "-language:postfixOps",
+    "-Xlog-free-terms",
+    "-Xlog-free-types",
+  ),
+
+  organizationName := "Jack Henry & Associates, Inc.®",
+  startYear := Some(2019),
+  licenses += ("Apache-2.0", new URL("https://www.apache.org/licenses/LICENSE-2.0.txt")),
+
+  resolvers += "confluent" at "http://packages.confluent.io/maven/",
+
+  addCompilerPlugin("org.typelevel" %% "kind-projector" % "0.10.3"),
+  addCompilerPlugin("com.olegpy" %% "better-monadic-for" % "0.3.0"),
+  libraryDependencies ++= Seq(
+    "co.fs2"                       %% "fs2-core"                  % V.fs2,
+    //TODO may no longer need logging excludes for kafka-clients, need to verify
+    "org.apache.kafka"              % "kafka-clients"             % V.kafka exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "javax.ws.rs" % "javax.ws.rs-api" % "2.1.1" artifacts Artifact("javax.ws.rs-api", "jar", "jar"), // This explicit dependency is needed for confluent (see https://github.com/sbt/sbt/issues/3618#issuecomment-413257502)
+    "io.confluent"                  % "kafka-avro-serializer"     % V.confluent exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j") exclude("org.apache.zookeeper", "zookeeper"),
+    "com.sksamuel.avro4s"          %% "avro4s-core"               % V.avro4s,
+    "io.prometheus"                 % "simpleclient"              % "0.6.0",
+    "io.chrisdavenport"            %% "log4cats-slf4j"            % V.log4cats,
+    "org.apache.curator"            % "curator-test"              % "4.2.0"          % "test",
+    "org.apache.kafka"             %% "kafka"                     % V.kafka          % "test" exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "org.apache.kafka"             %% "kafka"                     % V.kafka          % "test" classifier "test" exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "org.apache.kafka"              % "kafka-clients"             % V.kafka          % "test" classifier "test" exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "io.confluent"                  % "kafka-schema-registry"     % V.confluent      % "test" exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "io.confluent"                  % "kafka-schema-registry"     % V.confluent      % "test" classifier "tests" exclude("org.slf4j", "slf4j-log4j12") exclude("log4j", "log4j"),
+    "junit"                         % "junit"                     % "4.12"           % "test",
+    "ch.qos.logback"                % "logback-classic"           % "1.2.3"          % "test",
+    "org.slf4j"                     % "log4j-over-slf4j"          % "1.7.26"         % "test",
+    "org.scalacheck"               %% "scalacheck"                % "1.14.0"         % "test",
+    "org.scalatest"                %% "scalatest"                 % "3.0.8"          % "test",
+    "com.github.alexarchambault"   %% "scalacheck-shapeless_1.14" % "1.2.3"          % "test",
+    "org.typelevel"                %% "cats-laws"                 % V.cats           % "test",
+    "org.typelevel"                %% "discipline"                % "0.11.1"         % "test"
+  ),
+  sourceGenerators in Test += (avroScalaGenerate in Test).taskValue,
+  watchSources ++= ((avroSourceDirectory in Test).value ** "*.avdl").get,
+  testOptions in Test += Tests.Argument(TestFrameworks.ScalaTest, "-oS"),
+)
+
+lazy val releaseSettings = {
+  import ReleaseTransformations._
+  Seq(
+    releaseCrossBuild := true,
+    releaseProcess := Seq[ReleaseStep](
+      checkSnapshotDependencies,
+      inquireVersions,
+      runClean,
+      runTest,
+      setReleaseVersion,
+      commitReleaseVersion,
+      tagRelease,
+      releaseStepCommandAndRemaining("+publishSigned"),
+      setNextVersion,
+      commitNextVersion,
+      releaseStepCommand("sonatypeReleaseAll"),
+      pushChanges
+    ),
+    publishTo := {
+      val nexus = "https://oss.sonatype.org/"
+      if (isSnapshot.value)
+        Some("snapshots" at nexus + "content/repositories/snapshots")
+      else
+        Some("releases" at nexus + "service/local/staging/deploy/maven2")
+    },
+    credentials ++= (
+      for {
+        username <- Option(System.getenv().get("SONATYPE_USERNAME"))
+        password <- Option(System.getenv().get("SONATYPE_PASSWORD"))
+      } yield
+        Credentials(
+          "Sonatype Nexus Repository Manager",
+          "oss.sonatype.org",
+          username,
+          password
+        )
+    ).toSeq,
+    publishArtifact in Test := false,
+    releasePublishArtifactsAction := PgpKeys.publishSigned.value,
+    scmInfo := Some(
+      ScmInfo(
+        url("https://github.com/banno/kafka4s"),
+        "[email protected]:banno/kafka4s.git"
+      )
+    ),
+    homepage := Some(url("https://github.com/banno/kafka4s")),
+    publishMavenStyle := true,
+    pomIncludeRepository := { _ =>
+      false
+    },
+    pomExtra := {
+      <developers>
+        {for ((username, name) <- contributors) yield
+        <developer>
+          <id>{username}</id>
+          <name>{name}</name>
+          <url>http://github.com/{username}</url>
+        </developer>
+        }
+      </developers>
+    }
+  )
+}
+
+lazy val mimaSettings = {
+  import sbtrelease.Version
+
+  def semverBinCompatVersions(major: Int, minor: Int, patch: Int): Set[(Int, Int, Int)] = {
+    val majorVersions: List[Int] =
+      if (major == 0 && minor == 0) List.empty[Int] // If 0.0.x do not check MiMa
+      else List(major)
+    val minorVersions : List[Int] =
+      if (major >= 1) Range(0, minor).inclusive.toList
+      else List(minor)
+    def patchVersions(currentMinVersion: Int): List[Int] =
+      if (minor == 0 && patch == 0) List.empty[Int]
+      else if (currentMinVersion != minor) List(0)
+      else Range(0, patch - 1).inclusive.toList
+
+    val versions = for {
+      maj <- majorVersions
+      min <- minorVersions
+      pat <- patchVersions(min)
+    } yield (maj, min, pat)
+    versions.toSet
+  }
+
+  def mimaVersions(version: String): Set[String] = {
+    Version(version) match {
+      case Some(Version(major, Seq(minor, patch), _)) =>
+        semverBinCompatVersions(major.toInt, minor.toInt, patch.toInt)
+          .map{case (maj, min, pat) => maj.toString + "." + min.toString + "." + pat.toString}
+      case _ =>
+        Set.empty[String]
+    }
+  }
+  // Safety Net For Exclusions
+  lazy val excludedVersions: Set[String] = Set()
+
+  // Safety Net for Inclusions
+  lazy val extraVersions: Set[String] = Set()
+
+  Seq(
+    mimaFailOnProblem := mimaVersions(version.value).toList.headOption.isDefined,
+    mimaPreviousArtifacts := (mimaVersions(version.value) ++ extraVersions)
+      .filterNot(excludedVersions.contains(_))
+      .map{v =>
+        val moduleN = moduleName.value + "_" + scalaBinaryVersion.value.toString
+        organization.value % moduleN % v
+      },
+    mimaBinaryIssueFilters ++= {
+      import com.typesafe.tools.mima.core._
+      import com.typesafe.tools.mima.core.ProblemFilters._
+      Seq()
+    }
+  )
+}
+
+lazy val micrositeSettings = {
+  import microsites._
+  Seq(
+    micrositeName := "kafka4s",
+    micrositeDescription := "Functional programming with Kafka and Scala",
+    micrositeAuthor := "Jack Henry & Associates, Inc.®",
+    micrositeGithubOwner := "Banno",
+    micrositeGithubRepo := "kafka4s",
+    micrositeBaseUrl := "/kafka4s",
+    micrositeDocumentationUrl := "/kafka4s/docs",
+    micrositeFooterText := None,
+    micrositeHighlightTheme := "atom-one-light",
+    micrositePalette := Map(
+      "brand-primary" -> "#3e5b95",
+      "brand-secondary" -> "#294066",
+      "brand-tertiary" -> "#2d5799",
+      "gray-dark" -> "#49494B",
+      "gray" -> "#7B7B7E",
+      "gray-light" -> "#E5E5E6",
+      "gray-lighter" -> "#F4F3F4",
+      "white-color" -> "#FFFFFF"
+    ),
+    fork in tut := true,
+    scalacOptions in Tut --= Seq(
+      "-Xfatal-warnings",
+      "-Ywarn-unused-import",
+      "-Ywarn-numeric-widen",
+      "-Ywarn-dead-code",
+      "-Ywarn-unused:imports",
+      "-Xlint:-missing-interpolator,_"
+    ),
+    libraryDependencies += "com.47deg" %% "github4s" % "0.20.1",
+    micrositePushSiteWith := GitHub4s,
+    micrositeGithubToken := sys.env.get("GITHUB_TOKEN"),
+    micrositeExtraMdFiles := Map(
+      file("CHANGELOG.md")        -> ExtraMdFileConfig("changelog.md", "page", Map("title" -> "changelog", "section" -> "changelog", "position" -> "100")),
+      file("CODE_OF_CONDUCT.md")  -> ExtraMdFileConfig("code-of-conduct.md",   "page", Map("title" -> "code of conduct",   "section" -> "code of conduct",   "position" -> "101")),
+      file("LICENSE")             -> ExtraMdFileConfig("license.md",   "page", Map("title" -> "license",   "section" -> "license",   "position" -> "102"))
+    )
+  )
+}
+
+lazy val skipOnPublishSettings = Seq(
+  skip in publish := true,
+  publish := (()),
+  publishLocal := (()),
+  publishArtifact := false,
+  publishTo := None
+)

core/src/main/scala/com/banno/kafka/TopicPartitionOffset.scala

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2019 Jack Henry & Associates, Inc.®
+ *
+ * Licensed 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.
+ */
+
+package com.banno.kafka
+
+import org.apache.kafka.common.TopicPartition
+import org.apache.kafka.clients.consumer.OffsetAndMetadata
+
+case class TopicPartitionOffset(topic: String, partition: Int, offset: Long)
+object TopicPartitionOffset {
+  implicit def toMap(o: TopicPartitionOffset): Map[TopicPartition, OffsetAndMetadata] = 
+    Map(new TopicPartition(o.topic, o.partition) -> new OffsetAndMetadata(o.offset))
+}