KAFKA-17224 Make ForeachProcessor internal (#17129)

Reviewers: Chia-Ping Tsai <[email protected]>

streams/src/main/java/org/apache/kafka/streams/kstream/ForeachProcessor.java

@@ -19,6 +19,8 @@
 import org.apache.kafka.streams.processor.api.Processor;
 import org.apache.kafka.streams.processor.api.Record;
 
+// deprecated since 4.0.
+@Deprecated
 public class ForeachProcessor<K, V> implements Processor<K, V, Void, Void> {
 
     private final ForeachAction<K, V> action;

streams/src/main/java/org/apache/kafka/streams/kstream/internals/ForeachProcessor.java

@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.kafka.streams.kstream.internals;
+
+import org.apache.kafka.streams.kstream.ForeachAction;
+import org.apache.kafka.streams.processor.api.Processor;
+import org.apache.kafka.streams.processor.api.Record;
+
+public class ForeachProcessor<K, V> implements Processor<K, V, Void, Void> {
+
+    private final ForeachAction<K, V> action;
+
+    public ForeachProcessor(final ForeachAction<K, V> action) {
+        this.action = action;
+    }
+
+    @Override
+    public void process(final Record<K, V> record) {
+        action.apply(record.key(), record.value());
+    }
+}

streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImpl.java

@@ -22,7 +22,6 @@
 import org.apache.kafka.streams.internals.ApiUtils;
 import org.apache.kafka.streams.kstream.BranchedKStream;
 import org.apache.kafka.streams.kstream.ForeachAction;
-import org.apache.kafka.streams.kstream.ForeachProcessor;
 import org.apache.kafka.streams.kstream.GlobalKTable;
 import org.apache.kafka.streams.kstream.Grouped;
 import org.apache.kafka.streams.kstream.JoinWindows;