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;
  
  import org.apache.kafka.streams.kstream.EmitStrategy;
  import org.apache.kafka.streams.state.internals.RocksDbIndexedTimeOrderedWindowBytesStoreSupplier;
  import org.apache.kafka.streams.state.internals.RocksDbTimeOrderedSessionBytesStoreSupplier;
  
  /**
   * Collection of builtin {@link DslStoreSuppliers} for Kafka Streams. Today we
   * support RocksDb and InMemory stores out of the box.
   */
  public class BuiltInDslStoreSuppliers {
  
      public static final DslStoreSuppliers ROCKS_DB = new RocksDBDslStoreSuppliers();
      public static final DslStoreSuppliers IN_MEMORY = new InMemoryDslStoreSuppliers();
  
      /**
       * A {@link DslStoreSuppliers} that supplies all stores backed by RocksDB
       */
      public static class RocksDBDslStoreSuppliers implements DslStoreSuppliers {
  
          @Override
          public KeyValueBytesStoreSupplier keyValueStore(final DslKeyValueParams params) {
              return params.isTimestamped()
                      ? Stores.persistentTimestampedKeyValueStore(params.name())
                      : Stores.persistentKeyValueStore(params.name());
          }
  
          @Override
          public WindowBytesStoreSupplier windowStore(final DslWindowParams params) {
              if (params.emitStrategy().type() == EmitStrategy.StrategyType.ON_WINDOW_CLOSE) {
                  return RocksDbIndexedTimeOrderedWindowBytesStoreSupplier.create(
                          params.name(),
                          params.retentionPeriod(),
                          params.windowSize(),
                          params.retainDuplicates(),
                          params.isSlidingWindow());
              }
  
              if (params.isTimestamped()) {
                  return Stores.persistentTimestampedWindowStore(
                          params.name(),
                          params.retentionPeriod(),
                          params.windowSize(),
                          params.retainDuplicates());
              } else {
                  return Stores.persistentWindowStore(
                          params.name(),
                          params.retentionPeriod(),
                          params.windowSize(),
                          params.retainDuplicates());
              }
          }
  
          @Override
          public SessionBytesStoreSupplier sessionStore(final DslSessionParams params) {
              if (params.emitStrategy().type() == EmitStrategy.StrategyType.ON_WINDOW_CLOSE) {
                  return new RocksDbTimeOrderedSessionBytesStoreSupplier(
                          params.name(),
                          params.retentionPeriod().toMillis(),
                          true);
              }
  
              return Stores.persistentSessionStore(params.name(), params.retentionPeriod());
          }
      }
  
      /**
       * A {@link DslStoreSuppliers} that supplies all stores backed by an in-memory map
       */
      public static class InMemoryDslStoreSuppliers implements DslStoreSuppliers {
  
          @Override
          public KeyValueBytesStoreSupplier keyValueStore(final DslKeyValueParams params) {
              return Stores.inMemoryKeyValueStore(params.name());
          }
  
          @Override
          public WindowBytesStoreSupplier windowStore(final DslWindowParams params) {
              return Stores.inMemoryWindowStore(
                      params.name(),
                      params.retentionPeriod(),
                      params.windowSize(),
                      params.retainDuplicates()
              );
          }
  
          @Override
          public SessionBytesStoreSupplier sessionStore(final DslSessionParams params) {
              return Stores.inMemorySessionStore(params.name(), params.retentionPeriod());
          }
      }
  }