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 backtype.storm.scheduler;
  
  import java.util.Map;
  import java.util.Collection;
  
  public interface ISupervisor {
      void prepare(Map stormConf, String schedulerLocalDir);
  
      /**
       * The id used for writing metadata into ZK.
       * for mesos, this is {hostname}-{topologyid}
       */
      String getSupervisorId();
  
      /**
       * The id used in assignments. This combined with confirmAssigned decides what this supervisor is responsible for.
       * The combination of this and getSupervisorId allows Nimbus to assign to a single machine and have multiple
       * supervisors on that machine execute the assignment. This is important for achieving resource isolation.
       */
      String getAssignmentId();
  
      Object getMetadata();
  
      boolean confirmAssigned(int port);
  
      // calls this before actually killing the worker locally...
      // sends a "task finished" update
      void killedWorker(int port);
  
      void assigned(Collection<Integer> ports);
  }
  