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.cloudstack.ha.task;
  
  import org.apache.cloudstack.ha.HAConfig;
  import org.apache.cloudstack.ha.HAManager;
  import org.apache.cloudstack.ha.HAResource;
  import org.apache.cloudstack.ha.HAResourceCounter;
  import org.apache.cloudstack.ha.provider.HACheckerException;
  import org.apache.cloudstack.ha.provider.HAFenceException;
  import org.apache.cloudstack.ha.provider.HAProvider;
  
  import javax.inject.Inject;
  import java.util.concurrent.ExecutorService;
  
  public class FenceTask extends BaseHATask {
  
      @Inject
      private HAManager haManager;
  
      public FenceTask(final HAResource resource, final HAProvider<HAResource> haProvider, final HAConfig haConfig,
                       final HAProvider.HAProviderConfig haProviderConfig, final ExecutorService executor) {
          super(resource, haProvider, haConfig, haProviderConfig, executor);
      }
  
      public boolean performAction() throws HACheckerException, HAFenceException {
          return getHaProvider().fence(getResource());
      }
  
      public void processResult(boolean result, Throwable e) {
          final HAConfig haConfig = getHaConfig();
          final HAResourceCounter counter = haManager.getHACounter(haConfig.getResourceId(), haConfig.getResourceType());
          if (result) {
              counter.resetRecoveryCounter();
              haManager.transitionHAState(HAConfig.Event.Fenced, haConfig);
              getHaProvider().fenceSubResources(getResource());
              getHaProvider().enableMaintenance(getResource());
          }
          getHaProvider().sendAlert(getResource(), HAConfig.HAState.Fencing);
      }
  }
  