content: /*
   * 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.test;
  
  import org.apache.kafka.clients.producer.ProducerRecord;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.header.Headers;
  import org.apache.kafka.common.serialization.Serializer;
  import org.apache.kafka.streams.processor.StreamPartitioner;
  import org.apache.kafka.streams.processor.internals.InternalProcessorContext;
  import org.apache.kafka.streams.processor.internals.RecordCollector;
  
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import static java.util.Collections.unmodifiableList;
  
  public class MockRecordCollector implements RecordCollector {
  
      // remember all records that are collected so far
      private final List<ProducerRecord<Object, Object>> collected = new LinkedList<>();
  
      // remember if flushed is called
      private boolean flushed = false;
  
      @Override
      public <K, V> void send(final String topic,
                              final K key,
                              final V value,
                              final Headers headers,
                              final Integer partition,
                              final Long timestamp,
                              final Serializer<K> keySerializer,
                              final Serializer<V> valueSerializer,
                              final String processorNodeId,
                              final InternalProcessorContext<Void, Void> context) {
          collected.add(new ProducerRecord<>(
              topic,
              partition,
              timestamp,
              key,
              value,
              headers)
          );
      }
  
      @Override
      public <K, V> void send(final String topic,
                              final K key,
                              final V value,
                              final Headers headers,
                              final Long timestamp,
                              final Serializer<K> keySerializer,
                              final Serializer<V> valueSerializer,
                              final String processorNodeId,
                              final InternalProcessorContext<Void, Void> context,
                              final StreamPartitioner<? super K, ? super V> partitioner) {
          collected.add(new ProducerRecord<>(
              topic,
              0, // partition id
              timestamp,
              key,
              value,
              headers)
          );
      }
  
      @Override
      public void initialize() {}
  
      @Override
      public void flush() {
          flushed = true;
      }
  
      @Override
      public void closeClean() {}
  
      @Override
      public void closeDirty() {}
  
      @Override
      public Map<TopicPartition, Long> offsets() {
          return Collections.emptyMap();
      }
  
      public List<ProducerRecord<Object, Object>> collected() {
          return unmodifiableList(collected);
      }
  
      public boolean flushed() {
          return flushed;
      }
  
      public void clear() {
          this.flushed = false;
          this.collected.clear();
      }
  }
  