//
// 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
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package com.cloud.hypervisor.xenserver.resource.wrapper.xenbase;

import org.apache.log4j.Logger;

import com.cloud.agent.api.Answer;
import com.cloud.agent.api.GetHostStatsAnswer;
import com.cloud.agent.api.GetHostStatsCommand;
import com.cloud.agent.api.HostStatsEntry;
import com.cloud.hypervisor.xenserver.resource.CitrixResourceBase;
import com.cloud.resource.CommandWrapper;
import com.cloud.resource.ResourceWrapper;
import com.xensource.xenapi.Connection;

@ResourceWrapper(handles =  GetHostStatsCommand.class)
public final class CitrixGetHostStatsCommandWrapper extends CommandWrapper<GetHostStatsCommand, Answer, CitrixResourceBase> {

    private static final Logger s_logger = Logger.getLogger(CitrixGetHostStatsCommandWrapper.class);

    @Override
    public Answer execute(final GetHostStatsCommand command, final CitrixResourceBase citrixResourceBase) {
        final Connection conn = citrixResourceBase.getConnection();
        try {
            final HostStatsEntry hostStats = citrixResourceBase.getHostStats(conn, command, command.getHostGuid(), command.getHostId());
            return new GetHostStatsAnswer(command, hostStats);
        } catch (final Exception e) {
            final String msg = "Unable to get Host stats" + e.toString();
            s_logger.warn(msg, e);
            return new GetHostStatsAnswer(command, null);
        }
    }
}