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 com.cloud.hypervisor.xenserver.resource.wrapper.xenbase;
  
  import java.util.HashMap;
  
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.ClusterVMMetaDataSyncAnswer;
  import com.cloud.agent.api.ClusterVMMetaDataSyncCommand;
  import com.cloud.hypervisor.xenserver.resource.CitrixResourceBase;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.xensource.xenapi.Connection;
  import com.xensource.xenapi.Host;
  import com.xensource.xenapi.Pool;
  
  @ResourceWrapper(handles =  ClusterVMMetaDataSyncCommand.class)
  public final class CitrixClusterVMMetaDataSyncCommandWrapper extends CommandWrapper<ClusterVMMetaDataSyncCommand, Answer, CitrixResourceBase> {
  
  
      @Override
      public Answer execute(final ClusterVMMetaDataSyncCommand command, final CitrixResourceBase citrixResourceBase) {
          final Connection conn = citrixResourceBase.getConnection();
          //check if this is master
          try {
              final Pool pool = Pool.getByUuid(conn, citrixResourceBase.getHost().getPool());
              final Pool.Record poolr = pool.getRecord(conn);
              final Host.Record hostr = poolr.master.getRecord(conn);
              if (!citrixResourceBase.getHost().getUuid().equals(hostr.uuid)) {
                  return new ClusterVMMetaDataSyncAnswer(command.getClusterId(), null);
              }
          } catch (final Throwable e) {
              logger.warn("Check for master failed, failing the Cluster sync VMMetaData command");
              return new ClusterVMMetaDataSyncAnswer(command.getClusterId(), null);
          }
          final HashMap<String, String> vmMetadatum = citrixResourceBase.clusterVMMetaDataSync(conn);
          return new ClusterVMMetaDataSyncAnswer(command.getClusterId(), vmMetadatum);
      }
  }
  