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.sc;
  
  import java.util.Set;
  import org.apache.bookkeeper.net.BookieId;
  import org.apache.bookkeeper.stream.proto.cluster.ClusterAssignmentData;
  import org.apache.bookkeeper.stream.proto.cluster.ClusterMetadata;
  
  /**
   * Storage container controller is used for assigning containers to servers.
   */
  public interface StorageContainerController {
  
      /**
       * Compute the ideal container assignment state based on hosts alive in the cluster.
       *
       * @param clusterMetadata cluster metadata
       * @param currentState current container assignment state
       * @param currentCluster current servers alive in the cluster
       * @return the compute ideal assignment state
       */
      ClusterAssignmentData computeIdealState(ClusterMetadata clusterMetadata,
                                              ClusterAssignmentData currentState,
                                              Set<BookieId> currentCluster);
  
  }
  