xenadmin/XenAdmin/Diagnostics/Checks/Check.cs

/* Copyright (c) Citrix Systems, Inc. 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System.Collections.Generic;
using System.Diagnostics;
using XenAdmin.Core;
using XenAdmin.Diagnostics.Problems;
using XenAPI;

namespace XenAdmin.Diagnostics.Checks
{
    public abstract class Check
    {
        protected abstract Problem RunCheck();

        /// <summary>
        /// By default, most Checks return zero or one Problems, but a 
        /// Check can override this to return multiple Problems
        /// </summary>
        public virtual List<Problem> RunAllChecks()
        {
            var list = new List<Problem>(1);
            var problem = RunCheck();
            if (problem != null)
                list.Add(problem);
            return list;
        }

        public abstract string Description { get; }
        public abstract IXenObject XenObject { get; }

        public virtual string SuccessfulCheckDescription =>
            string.IsNullOrEmpty(Description)
                ? string.Empty
                : string.Format(Messages.PATCHING_WIZARD_CHECK_OK, Description);
    }


    public abstract class PoolCheck : Check
    {
        protected PoolCheck(Pool pool)
        {
            Pool = pool;
        }

        protected Pool Pool { get; }

        public sealed override IXenObject XenObject => Pool;

        public override string SuccessfulCheckDescription =>
            string.IsNullOrEmpty(Description)
                ? string.Empty
                : string.Format(Messages.PATCHING_WIZARD_CHECK_ON_XENOBJECT_OK, Helpers.GetPoolOfOne(Pool.Connection), Description);
    }


    public abstract class HostCheck : Check
    {
        protected HostCheck(Host host)
        {
            Debug.Assert(host != null);
            Host = host;
        }

        protected Host Host { get; }

        public sealed override IXenObject XenObject => Host;

        public override string SuccessfulCheckDescription =>
            string.IsNullOrEmpty(Description)
                ? string.Empty
                : string.Format(Messages.PATCHING_WIZARD_CHECK_ON_XENOBJECT_OK, Host.Name(), Description);
    }
}