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.ambari.server.topology.tasks;
  
  import org.apache.ambari.server.security.authorization.internal.InternalAuthenticationToken;
  import org.apache.ambari.server.topology.ClusterTopology;
  import org.apache.ambari.server.topology.HostRequest;
  import org.apache.ambari.server.topology.TopologyManager;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.context.SecurityContextHolder;
  
  public abstract class TopologyHostTask implements TopologyTask {
  
    private static final Logger LOG = LoggerFactory.getLogger(TopologyHostTask.class);
  
    ClusterTopology clusterTopology;
    HostRequest hostRequest;
    boolean skipFailure;
  
    public TopologyHostTask(ClusterTopology topology, HostRequest hostRequest) {
      this.clusterTopology = topology;
      this.hostRequest = hostRequest;
    }
  
    public HostRequest getHostRequest() {
      return hostRequest;
    }
  
    /**
     * Run with an InternalAuthenticationToken as when running these tasks we might not have any active security context.
     */
    @Override
    public void run() {
      Authentication savedAuthContext = SecurityContextHolder.getContext().getAuthentication();
      try {
        InternalAuthenticationToken authenticationToken = new InternalAuthenticationToken(TopologyManager.INTERNAL_AUTH_TOKEN);
        authenticationToken.setAuthenticated(true);
        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
        runTask();
      } finally {
        SecurityContextHolder.getContext().setAuthentication(savedAuthContext);
      }
    }
  
    public abstract void runTask();
  
  }
  