Add singleTopic in CommittableOffsetBatch

Author: geirolz

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

@@ -101,6 +101,7 @@ sealed abstract class CommittableOffsetBatch[F[_]] {
 }
 
 object CommittableOffsetBatch {
+
   private[kafka] def apply[F[_]](
     offsets: Map[TopicPartition, OffsetAndMetadata],
     consumerGroupIds: Set[String],
@@ -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")
                       )
                   )
@@ -164,6 +165,36 @@ object CommittableOffsetBatch {
     }
   }
 
+  @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] =
+    apply[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.
+    *
+    * @param topicPartition Topic partition information
+    * @param offsetAndMetadata Offset and metadata
+    * @param consumerGroupId Consumer group id
+    * @param commit effect to perform to commit this offset
+    * @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](
     topicPartition: TopicPartition,
     offsetAndMetadata: OffsetAndMetadata,