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.Set;
  
  import org.apache.xmlrpc.XmlRpcException;
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.GetStorageStatsAnswer;
  import com.cloud.agent.api.GetStorageStatsCommand;
  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.SR;
  import com.xensource.xenapi.Types.XenAPIException;
  
  @ResourceWrapper(handles =  GetStorageStatsCommand.class)
  public final class CitrixGetStorageStatsCommandWrapper extends CommandWrapper<GetStorageStatsCommand, Answer, CitrixResourceBase> {
  
  
      @Override
      public Answer execute(final GetStorageStatsCommand command, final CitrixResourceBase citrixResourceBase) {
          final Connection conn = citrixResourceBase.getConnection();
          try {
              final Set<SR> srs = SR.getByNameLabel(conn, command.getStorageId());
              if (srs.size() != 1) {
                  final String msg = "There are " + srs.size() + " storageid: " + command.getStorageId();
                  logger.warn(msg);
                  return new GetStorageStatsAnswer(command, msg);
              }
              final SR sr = srs.iterator().next();
              sr.scan(conn);
              final long capacity = sr.getPhysicalSize(conn);
              final long used = sr.getPhysicalUtilisation(conn);
              return new GetStorageStatsAnswer(command, capacity, used);
          } catch (final XenAPIException e) {
              final String msg = "GetStorageStats Exception:" + e.toString() + "host:" + citrixResourceBase.getHost().getUuid() + "storageid: " + command.getStorageId();
              logger.warn(msg);
              return new GetStorageStatsAnswer(command, msg);
          } catch (final XmlRpcException e) {
              final String msg = "GetStorageStats Exception:" + e.getMessage() + "host:" + citrixResourceBase.getHost().getUuid() + "storageid: " + command.getStorageId();
              logger.warn(msg);
              return new GetStorageStatsAnswer(command, msg);
          }  catch (final Exception e) {
              final String msg = "GetStorageStats Exception:" + e.getMessage() + "host:" + citrixResourceBase.getHost().getUuid() + "storageid: " + command.getStorageId();
              logger.warn(msg);
              return new GetStorageStatsAnswer(command, msg);
          }
      }
  }
  