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.bifromq.retain.store;
  
  import org.apache.bifromq.basekv.proto.KVRangeId;
  import org.apache.bifromq.basekv.store.api.IKVCloseableReader;
  import org.apache.bifromq.basekv.store.api.IKVRangeCoProc;
  import org.apache.bifromq.basekv.store.api.IKVRangeCoProcFactory;
  import org.apache.bifromq.basekv.store.api.IKVRangeSplitHinter;
  import org.apache.bifromq.basekv.store.range.hinter.MutationKVLoadBasedSplitHinter;
  import org.apache.bifromq.basekv.utils.KVRangeIdUtil;
  import java.time.Duration;
  import java.util.Collections;
  import java.util.List;
  import java.util.Optional;
  import java.util.function.Supplier;
  
  public class RetainStoreCoProcFactory implements IKVRangeCoProcFactory {
      private final Duration loadEstWindow;
  
      public RetainStoreCoProcFactory(Duration loadEstimateWindow) {
          this.loadEstWindow = loadEstimateWindow;
      }
  
      @Override
      public List<IKVRangeSplitHinter> createHinters(String clusterId, String storeId, KVRangeId id,
                                                     Supplier<IKVCloseableReader> rangeReaderProvider) {
          return Collections.singletonList(
              new MutationKVLoadBasedSplitHinter(loadEstWindow, Optional::of,
                  "clusterId", clusterId, "storeId", storeId, "rangeId", KVRangeIdUtil.toString(id)));
      }
  
      @Override
      public IKVRangeCoProc createCoProc(String clusterId,
                                         String storeId,
                                         KVRangeId id,
                                         Supplier<IKVCloseableReader> rangeReaderProvider) {
          return new RetainStoreCoProc(clusterId, storeId, id, rangeReaderProvider);
      }
  
      public void close() {
      }
  }
  