function Restart-AlkamiAppPool {
<#
.SYNOPSIS
    Restarts an application pool and opens the user's default browser to warm it up
#>

    [CmdletBinding()]
    Param()
    DynamicParam {
        # Define the Paramater Attributes
        $ParameterName = "AppPoolName"
        $RuntimeParameterDictionary = New-Object System.Management.Automation.RuntimeDefinedParameterDictionary
        $ParameterAttribute = New-Object System.Management.Automation.ParameterAttribute
        $AttributeCollection = New-Object System.Collections.ObjectModel.Collection[System.Attribute]
        $ParameterAttribute.Mandatory = $true
        $ParameterAttribute.Position = 0
        $AttributeCollection.Add($ParameterAttribute)

        # Generate and add the ValidateSet
        $arrSet = $appTierApplications | ForEach-Object {$_.WebAppName}
        $ValidateSetAttribute = New-Object System.Management.Automation.ValidateSetAttribute($arrSet)
        $AttributeCollection.Add($ValidateSetAttribute)

        # Create the dynamic parameter
        $RuntimeParameter = New-Object System.Management.Automation.RuntimeDefinedParameter($ParameterName, [string], $AttributeCollection)
        $RuntimeParameterDictionary.Add($ParameterName, $RuntimeParameter)
        return $RuntimeParameterDictionary
    }

    begin {
        # Bind the parameter to a variable
        $AppPoolName = $PsBoundParameters[$ParameterName]
    }

    process {
        try
        {
            $logLead  = (Get-LogLeadName);

            $mgr = New-Object Microsoft.Web.Administration.ServerManager
            $appPool = $mgr.ApplicationPools[$appPoolName]
            $processId = $appPool.WorkerProcesses.ProcessId

            Write-Output ("$logLead : Recycling application pool {0}" -f $AppPoolName)
            $appPool.Recycle() | Out-Null

            $serviceEndpoint = ($appTierApplications | Where-Object {$_.WebAppName -eq $AppPoolName} | Select-Object -First 1).Endpoint
            $site = "http://localhost/$AppPoolName/$serviceEndpoint"
            $browserId = Open-UrlInDefaultBrowser $site

            Start-Sleep -Seconds 15

            try
            {
                if ($null -ne (Get-Process -Id $processId -ErrorAction SilentlyContinue))
                {
                    Write-Verbose ("$logLead : Stopping old application pool process ID {0}" -f $processId)
                    Stop-Process -Id $processId -ErrorAction SilentlyContinue -Force
                }
            }
            catch
            {
                Write-Warning ("$logLead : An unexpected exception occurred while stopping the old application pool process, which is probably due to the process previously exiting")
            }

            try
            {
                if ($null -ne (Get-Process -Id $browserId -ErrorAction SilentlyContinue))
                {
                    Write-Verbose ("$logLead : Stopping browser process ID {0}" -f $browserId)
                    Stop-Process -Id $browserId
                }
            }
            catch
            {
                ## If this doesn't work the user can close their own browser
                Write-Warning "Unable to stop the browser process ID. Manual intervention of browser closing will have to occur."
            }

            Write-Output ("$logLead : Completed restart of application pool {0}" -f $AppPoolName)
        }
        finally
        {
            if ($null -ne $mgr)
            {
                $mgr = $null
            }
        }
    }
}