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.stream.storage.impl.cluster;
  
  import java.time.Duration;
  import org.apache.bookkeeper.discover.RegistrationClient;
  import org.apache.bookkeeper.stream.storage.api.cluster.ClusterController;
  import org.apache.bookkeeper.stream.storage.api.cluster.ClusterControllerLeader;
  import org.apache.bookkeeper.stream.storage.api.cluster.ClusterControllerLeaderSelector;
  import org.apache.bookkeeper.stream.storage.api.cluster.ClusterMetadataStore;
  import org.apache.bookkeeper.stream.storage.conf.StorageConfiguration;
  import org.apache.bookkeeper.stream.storage.impl.sc.StorageContainerController;
  
  /**
   * A service that elects a cluster controller leader for performing cluster actions,
   * such as assigning containers to servers.
   */
  public class ClusterControllerImpl implements ClusterController {
  
      private final ClusterControllerLeaderSelector controllerLeaderSelector;
  
      public ClusterControllerImpl(ClusterMetadataStore clusterMetadataStore,
                                   RegistrationClient registrationClient,
                                   StorageContainerController scController,
                                   ClusterControllerLeaderSelector clusterControllerLeaderSelector,
                                   StorageConfiguration conf) {
          ClusterControllerLeader controllerLeader = new ClusterControllerLeaderImpl(
              clusterMetadataStore,
              scController,
              registrationClient,
              Duration.ofMillis(conf.getClusterControllerScheduleIntervalMs()));
  
          this.controllerLeaderSelector = clusterControllerLeaderSelector;
          this.controllerLeaderSelector.initialize(controllerLeader);
      }
  
  
      @Override
      public void start() {
          this.controllerLeaderSelector.start();
      }
  
      @Override
      public void stop() {
          this.controllerLeaderSelector.close();
      }
  
  }
  