Add singleTopic in CommittableOffsetBatch

Author: geirolz

modules/core/src/main/scala/fs2/kafka/CommittableOffset.scala

@@ -110,12 +110,7 @@ object CommittableOffset {
         Map(_topicPartition -> _offsetAndMetadata)
 
       override def batch: CommittableOffsetBatch[F] =
-        CommittableOffsetBatch.one(
-          _topicPartition,
-          _offsetAndMetadata,
-          consumerGroupId,
-          _commit
-        )
+        CommittableOffsetBatch.one(this)
 
       override def commit: F[Unit] =
         _commit(offsets)

modules/core/src/main/scala/fs2/kafka/CommittableOffsetBatch.scala

@@ -101,7 +101,8 @@ sealed abstract class CommittableOffsetBatch[F[_]] {
 }
 
 object CommittableOffsetBatch {
-  private[kafka] def apply[F[_]](
+
+  private[kafka] def ofMultiTopic[F[_]](
     offsets: Map[TopicPartition, OffsetAndMetadata],
     consumerGroupIds: Set[String],
     consumerGroupIdsMissing: Boolean,
@@ -114,15 +115,15 @@ object CommittableOffsetBatch {
 
     new CommittableOffsetBatch[F] {
       override def updated(that: CommittableOffset[F]): CommittableOffsetBatch[F] =
-        CommittableOffsetBatch(
+        CommittableOffsetBatch.ofMultiTopic(
           _offsets.updated(that.topicPartition, that.offsetAndMetadata),
           that.consumerGroupId.fold(_consumerGroupIds)(_consumerGroupIds + _),
           _consumerGroupIdsMissing || that.consumerGroupId.isEmpty,
           _commitMap
         )
 
       override def updated(that: CommittableOffsetBatch[F]): CommittableOffsetBatch[F] =
-        CommittableOffsetBatch(
+        CommittableOffsetBatch.ofMultiTopic(
           _offsets ++ that.offsets,
           _consumerGroupIds ++ that.consumerGroupIds,
           _consumerGroupIdsMissing || that.consumerGroupIdsMissing,
@@ -140,7 +141,7 @@ object CommittableOffsetBatch {
 
       override def commit: F[Unit] =
         if (_consumerGroupIdsMissing)
-          F.raiseError(ConsumerGroupException(consumerGroupIds))
+          ApplicativeThrow[F].raiseError(ConsumerGroupException(consumerGroupIds))
         else {
           offsetsByTopic
             .map {
@@ -149,7 +150,7 @@ object CommittableOffsetBatch {
                   .getOrElse[Map[TopicPartition, OffsetAndMetadata] => F[Unit]](
                     topicName,
                     _ =>
-                      F.raiseError(
+                      ApplicativeThrow[F].raiseError(
                         new RuntimeException(s"Cannot perform commit for topic: $topicName")
                       )
                   )
@@ -164,17 +165,43 @@ object CommittableOffsetBatch {
     }
   }
 
-  def one[F[_]: ApplicativeThrow](
-    topicPartition: TopicPartition,
-    offsetAndMetadata: OffsetAndMetadata,
-    consumerGroupId: Option[String],
+  @deprecated("Use CommittableOffsetBatch.apply with commitMap instead.", since = "2.5.1")
+  private[kafka] def apply[F[_]](
+    offsets: Map[TopicPartition, OffsetAndMetadata],
+    consumerGroupIds: Set[String],
+    consumerGroupIdsMissing: Boolean,
     commit: Map[TopicPartition, OffsetAndMetadata] => F[Unit]
+  )(implicit F: ApplicativeError[F, Throwable]): CommittableOffsetBatch[F] =
+    ofMultiTopic[F](
+      offsets,
+      consumerGroupIds,
+      consumerGroupIdsMissing,
+      offsets.headOption
+        .map(_._1.topic())
+        .map(topicName => Map(topicName -> commit))
+        .getOrElse(Map.empty)
+    )
+
+  /**
+    * A [[CommittableOffsetBatch]] which does include only one offset for a single topic.
+    *
+    * @tparam F effect type to use to perform the commit effect
+    * @return A [[CommittableOffsetBatch]] which does include only one offset for a single topic.
+    *
+    * @see [[CommittableOffsetBatch#fromFoldable]]
+    * @see [[CommittableOffsetBatch#fromFoldableOption]]
+    */
+  def one[F[_]: ApplicativeThrow](
+    committableOffset: CommittableOffset[F]
   ): CommittableOffsetBatch[F] =
-    CommittableOffsetBatch(
-      Map(topicPartition -> offsetAndMetadata),
-      consumerGroupId.toSet,
-      consumerGroupId.isEmpty,
-      Map(topicPartition.topic() -> commit)
+    CommittableOffsetBatch.ofMultiTopic[F](
+      Map(committableOffset.topicPartition -> committableOffset.offsetAndMetadata),
+      committableOffset.consumerGroupId.toSet,
+      committableOffset.consumerGroupId.isEmpty,
+      Map(
+        committableOffset.topicPartition
+          .topic() -> Map(committableOffset.topicPartition.topic() -> committableOffset.commit)
+      )
     )
 
   /**
@@ -238,7 +265,7 @@ object CommittableOffsetBatch {
         }
       }
 
-      CommittableOffsetBatch(
+      CommittableOffsetBatch.ofMultiTopic(
         offsetsMap,
         consumerGroupIds,
         consumerGroupIdsMissing,
@@ -290,7 +317,7 @@ object CommittableOffsetBatch {
     if (offsets.isEmpty || offsets.exists(_.isEmpty))
       CommittableOffsetBatch.empty[F]
     else
-      CommittableOffsetBatch(
+      CommittableOffsetBatch.ofMultiTopic(
         offsetsMap,
         consumerGroupIds,
         consumerGroupIdsMissing,