content: /*
   * Licensed 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.stream.storage.impl.sc;
  
  import com.google.common.collect.Lists;
  import java.io.IOException;
  import java.util.List;
  import java.util.concurrent.CompletableFuture;
  import org.apache.bookkeeper.common.component.AbstractLifecycleComponent;
  import org.apache.bookkeeper.common.concurrent.FutureUtils;
  import org.apache.bookkeeper.stats.NullStatsLogger;
  import org.apache.bookkeeper.stream.proto.common.Endpoint;
  import org.apache.bookkeeper.stream.storage.api.sc.StorageContainer;
  import org.apache.bookkeeper.stream.storage.api.sc.StorageContainerManager;
  import org.apache.bookkeeper.stream.storage.api.sc.StorageContainerRegistry;
  import org.apache.bookkeeper.stream.storage.conf.StorageConfiguration;
  
  /**
   * A local implementation of {@link StorageContainerManager}.
   */
  public class LocalStorageContainerManager
      extends AbstractLifecycleComponent<StorageConfiguration>
      implements StorageContainerManager {
  
      private final Endpoint myEndpoint;
      private final int numStorageContainers;
      private final StorageContainerRegistry registry;
  
      public LocalStorageContainerManager(Endpoint myEndpoint,
                                          StorageConfiguration conf,
                                          StorageContainerRegistry scRegistry,
                                          int numStorageContainers) {
          super("local-storage-container-manager", conf, NullStatsLogger.INSTANCE);
          this.myEndpoint = myEndpoint;
          this.registry = scRegistry;
          this.numStorageContainers = numStorageContainers;
      }
  
      @Override
      public Endpoint getStorageContainer(long scId) {
          return myEndpoint;
      }
  
      @Override
      protected void doStart() {
          List<CompletableFuture<StorageContainer>> futures = Lists.newArrayListWithExpectedSize(numStorageContainers);
          for (int scId = 0; scId < numStorageContainers; scId++) {
              futures.add(this.registry.startStorageContainer(scId));
          }
          FutureUtils.collect(futures).join();
      }
  
      @Override
      protected void doStop() {
          List<CompletableFuture<Void>> futures = Lists.newArrayListWithExpectedSize(numStorageContainers);
          for (int scId = 0; scId < numStorageContainers; scId++) {
              futures.add(this.registry.stopStorageContainer(scId));
          }
          FutureUtils.collect(futures).join();
      }
  
      @Override
      protected void doClose() throws IOException {
          // do nothing
      }
  }
  