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.deliverer;
  
  import static org.apache.bifromq.base.util.CompletableFutureUtil.unwrap;
  
  import org.apache.bifromq.basescheduler.BatchCallScheduler;
  import org.apache.bifromq.basescheduler.exception.BackPressureException;
  import org.apache.bifromq.sysprops.props.DataPlaneMaxBurstLatencyMillis;
  import java.time.Duration;
  import java.util.Optional;
  import java.util.concurrent.CompletableFuture;
  import lombok.extern.slf4j.Slf4j;
  
  @Slf4j
  public class MessageDeliverer extends BatchCallScheduler<DeliveryCall, DeliveryCallResult, DelivererKey>
      implements IMessageDeliverer {
  
      public MessageDeliverer(BatchDeliveryCallBuilderFactory batchDeliveryCallBuilderFactory) {
          super(batchDeliveryCallBuilderFactory,
              Duration.ofMillis(DataPlaneMaxBurstLatencyMillis.INSTANCE.get()).toNanos());
      }
  
      @Override
      public CompletableFuture<DeliveryCallResult> schedule(DeliveryCall request) {
          return super.schedule(request).exceptionally(unwrap(e -> {
              if (e instanceof BackPressureException) {
                  return DeliveryCallResult.BACK_PRESSURE_REJECTED;
              }
              log.error("Failed to schedule delivery call", e);
              return DeliveryCallResult.ERROR;
          }));
      }
  
      @Override
      protected Optional<DelivererKey> find(DeliveryCall request) {
          return Optional.of(request.delivererKey);
      }
  }
  