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.streams.state.internals;
  
  import org.apache.kafka.common.config.TopicConfig;
  import org.apache.kafka.common.serialization.Serde;
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.streams.state.WindowBytesStoreSupplier;
  import org.apache.kafka.streams.state.WindowStore;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Objects;
  
  public class WindowStoreBuilder<K, V> extends AbstractStoreBuilder<K, V, WindowStore<K, V>> {
      private static final Logger log = LoggerFactory.getLogger(WindowStoreBuilder.class);
  
      private final WindowBytesStoreSupplier storeSupplier;
  
      public WindowStoreBuilder(final WindowBytesStoreSupplier storeSupplier,
                                final Serde<K> keySerde,
                                final Serde<V> valueSerde,
                                final Time time) {
          super(storeSupplier.name(), keySerde, valueSerde, time);
          Objects.requireNonNull(storeSupplier, "storeSupplier can't be null");
          Objects.requireNonNull(storeSupplier.metricsScope(), "storeSupplier's metricsScope can't be null");
          this.storeSupplier = storeSupplier;
  
          if (storeSupplier.retainDuplicates()) {
              this.logConfig.put(TopicConfig.CLEANUP_POLICY_CONFIG, TopicConfig.CLEANUP_POLICY_DELETE);
          }
      }
  
      @Override
      public WindowStore<K, V> build() {
          if (storeSupplier.retainDuplicates() && enableCaching) {
              log.warn("Disabling caching for {} since store was configured to retain duplicates", storeSupplier.name());
              enableCaching = false;
          }
  
          return new MeteredWindowStore<>(
              maybeWrapCaching(maybeWrapLogging(storeSupplier.get())),
              storeSupplier.windowSize(),
              storeSupplier.metricsScope(),
              time,
              keySerde,
              valueSerde);
      }
  
      private WindowStore<Bytes, byte[]> maybeWrapCaching(final WindowStore<Bytes, byte[]> inner) {
          if (!enableCaching) {
              return inner;
          }
          return new CachingWindowStore(
              inner,
              storeSupplier.windowSize(),
              storeSupplier.segmentIntervalMs());
      }
  
      private WindowStore<Bytes, byte[]> maybeWrapLogging(final WindowStore<Bytes, byte[]> inner) {
          if (!enableLogging) {
              return inner;
          }
          return new ChangeLoggingWindowBytesStore(
              inner,
              storeSupplier.retainDuplicates(),
              WindowKeySchema::toStoreKeyBinary
          );
      }
  
      public long retentionPeriod() {
          return storeSupplier.retentionPeriod();
      }
  }
  