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.bookkeeper.clients.impl.internal;
  
  import static org.apache.bookkeeper.clients.impl.internal.ProtocolInternalUtils.createActiveRanges;
  import static org.apache.bookkeeper.stream.protocol.util.ProtoUtils.createGetActiveRangesRequest;
  
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.ScheduledExecutorService;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.bookkeeper.clients.impl.container.StorageContainerChannel;
  import org.apache.bookkeeper.clients.impl.container.StorageContainerChannelManager;
  import org.apache.bookkeeper.clients.impl.internal.api.HashStreamRanges;
  import org.apache.bookkeeper.clients.impl.internal.api.MetaRangeClient;
  import org.apache.bookkeeper.clients.impl.internal.mr.MetaRangeRequestProcessor;
  import org.apache.bookkeeper.clients.utils.ClientConstants;
  import org.apache.bookkeeper.common.util.Backoff;
  import org.apache.bookkeeper.common.util.OrderedScheduler;
  import org.apache.bookkeeper.stream.proto.StreamProperties;
  
  /**
   * A default implementation for {@link MetaRangeClient}.
   */
  @Slf4j
  class MetaRangeClientImpl implements MetaRangeClient {
  
      private final StreamProperties streamProps;
      private final ScheduledExecutorService executor;
      private final StorageContainerChannel scClient;
      private final Backoff.Policy backoffPolicy;
  
      MetaRangeClientImpl(StreamProperties streamProps,
                          OrderedScheduler scheduler,
                          StorageContainerChannelManager channelManager) {
          this(streamProps, scheduler, channelManager, ClientConstants.DEFAULT_INFINIT_BACKOFF_POLICY);
  
      }
  
      MetaRangeClientImpl(StreamProperties streamProps,
                          OrderedScheduler scheduler,
                          StorageContainerChannelManager channelManager,
                          Backoff.Policy backoffPolicy) {
          this.streamProps = streamProps;
          this.executor = scheduler.chooseThread(streamProps.getStreamId());
          this.scClient = channelManager.getOrCreate(streamProps.getStorageContainerId());
          this.backoffPolicy = backoffPolicy;
      }
  
      @Override
      public StreamProperties getStreamProps() {
          return streamProps;
      }
  
      StorageContainerChannel getStorageContainerClient() {
          return scClient;
      }
  
      //
      // Meta KeyRange Server Requests
      //
  
      @Override
      public CompletableFuture<HashStreamRanges> getActiveDataRanges() {
          return MetaRangeRequestProcessor.of(
              createGetActiveRangesRequest(streamProps),
              (response) -> createActiveRanges(response),
              scClient,
              executor,
              backoffPolicy
          ).process();
      }
  
  }
  