content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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 com.tencent.angel.master.deploy.local;
  
  import com.tencent.angel.common.Id;
  import com.tencent.angel.localcluster.LocalCluster;
  import com.tencent.angel.localcluster.LocalClusterContext;
  import com.tencent.angel.master.app.AMContext;
  import com.tencent.angel.master.deploy.ContainerAllocator;
  import com.tencent.angel.master.deploy.ContainerAllocatorEvent;
  import com.tencent.angel.master.ps.attempt.PSAttemptContainerAssignedEvent;
  import com.tencent.angel.master.worker.attempt.WorkerAttemptContainerAssignedEvent;
  import com.tencent.angel.ps.PSAttemptId;
  import com.tencent.angel.worker.WorkerAttemptId;
  
  /**
   * Local container allocator.
   */
  public class LocalContainerAllocator extends ContainerAllocator {
    /**
     * master context
     */
    private final AMContext context;
  
    /**
     * Create a LocalContainerAllocator
     *
     * @param context master context
     */
    public LocalContainerAllocator(AMContext context) {
      super(LocalContainerAllocator.class.getName());
      this.context = context;
    }
  
    @Override public void handle(ContainerAllocatorEvent event) {
      switch (event.getType()) {
        case CONTAINER_REQ:
          requestContainer(event);
          break;
  
        case CONTAINER_DEALLOCATE:
          deallocateContainer(event);
          break;
  
        default:
          break;
      }
    }
  
    private void deallocateContainer(ContainerAllocatorEvent event) {
  
    }
  
    @SuppressWarnings("unchecked") private void requestContainer(ContainerAllocatorEvent event) {
      LocalContainer allocated = new LocalContainer();
      Id id = event.getTaskId();
      if (id instanceof PSAttemptId) {
        context.getEventHandler()
          .handle(new PSAttemptContainerAssignedEvent((PSAttemptId) id, allocated));
      } else if (id instanceof WorkerAttemptId) {
        context.getEventHandler()
          .handle(new WorkerAttemptContainerAssignedEvent((WorkerAttemptId) id, allocated));
      }
    }
  
    @Override protected void serviceStop() throws Exception {
      if (!context.needClear()) {
        LocalCluster cluster = LocalClusterContext.get().getLocalCluster();
        if (cluster != null) {
          cluster.getLocalRM().masterExited(context.getApplicationId());
        }
      }
  
      super.serviceStop();
    }
  }
  