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.basekv.client.scheduler;
  
  import static org.apache.bifromq.basekv.client.KVRangeRouterUtil.findByKey;
  
  import com.google.protobuf.ByteString;
  import java.util.Optional;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bifromq.basekv.client.IBaseKVStoreClient;
  import org.apache.bifromq.basekv.client.KVRangeSetting;
  import org.apache.bifromq.basescheduler.BatchCallScheduler;
  
  /**
   * The abstract class for base-kv mutation call scheduler.
   *
   * @param <ReqT> the type of the request
   * @param <RespT> the type of the response
   * @param <BatchCallT> the type of the batch call
   */
  @Slf4j
  public abstract class MutationCallScheduler<ReqT, RespT, BatchCallT extends BatchMutationCall<ReqT, RespT>>
      extends BatchCallScheduler<ReqT, RespT, MutationCallBatcherKey> {
      protected final IBaseKVStoreClient storeClient;
  
      public MutationCallScheduler(IBatchMutationCallBuilder<ReqT, RespT, BatchCallT> batchCallBuilder,
                                   long maxBurstLatency,
                                   IBaseKVStoreClient storeClient) {
          super(new BatchMutationCallBuilderFactory<>(storeClient, batchCallBuilder), maxBurstLatency);
          this.storeClient = storeClient;
      }
  
      @Override
      protected final Optional<MutationCallBatcherKey> find(ReqT call) {
          Optional<KVRangeSetting> rangeSetting = findByKey(rangeKey(call), storeClient.latestEffectiveRouter());
          return rangeSetting.map(setting -> new MutationCallBatcherKey(setting.id(), setting.leader(), setting.ver()));
      }
  
      protected abstract ByteString rangeKey(ReqT call);
  }