Adding custom performance counters

using System;

using CMS.Base;
using CMS.HealthMonitoring;

[CustomCounterModuleLoader]
public partial class CMSModuleLoader
{
    /// <summary>
    /// Counter of total Home.aspx page requests.
    /// </summary>
    private static CMSPerformanceCounter mTotalHomePageRequests = null;

    /// <summary>
    /// Counter of total home page requests.
    /// </summary>
    public static CMSPerformanceCounter TotalHomePageRequests
    {
        get
        {
            if (mTotalHomePageRequests == null)
            {
                mTotalHomePageRequests = new CMSPerformanceCounter();
            }

            return mTotalHomePageRequests;
        }
    }

    /// <summary>
    /// Attribute class for registering custom performance counters
    /// </summary>
    private class CustomCounterModuleLoaderAttribute : CMSLoaderAttribute
    {
        /// <summary>
        /// Runs when the application starts
        /// </summary>
        public override void Init()
        {
            // Assigns a handler to the OnLogCustomCounter event
            HealthMonitoringLogHelper.OnLogCustomCounter += HealthMonitoringLogHelper_OnLogCustomCounter;
        }

        private static CMSPerformanceCounter HealthMonitoringLogHelper_OnLogCustomCounter(Counter counter)
        {
            if (counter.Key.ToLower() == "requestshomepage")
            {
                return TotalHomePageRequests;
            }

            return null;
        }
    }
}

protected override void OnLoad(EventArgs e)
{
    // Increments the Home.aspx page requests counter
    if (CMS.DocumentEngine.DocumentContext.CurrentPageInfo.NodeAliasPath.Equals("/home", StringComparison.InvariantCultureIgnoreCase))
    {
        CMSModuleLoader.TotalHomePageRequests.Increment(CMS.SiteProvider.SiteContext.CurrentSiteName);
    }

    base.OnLoad(e);
}