functions/Get-DbaXESession.ps1

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function Get-DbaXESession {
    <#
        .SYNOPSIS
            Gets a list of Extended Events Sessions from the specified SQL Server instance(s).
 
        .DESCRIPTION
            Retrieves a list of Extended Events Sessions present on the specified SQL Server instance(s).
 
        .PARAMETER SqlInstance
            Target SQL Server. You must have sysadmin access and server version must be SQL Server version 2008 or higher.
 
        .PARAMETER SqlCredential
            Allows you to login to servers using SQL Logins instead of Windows Authentication (AKA Integrated or Trusted). To use:
 
            $scred = Get-Credential, then pass $scred object to the -SqlCredential parameter.
 
            Windows Authentication will be used if SqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
 
            To connect as a different Windows user, run PowerShell as that user.
 
        .PARAMETER Session
            Only return specific sessions. Options for this parameter are auto-populated from the server.
 
        .PARAMETER EnableException
            By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
            This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
            Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
        .NOTES
            Tags: Memory
            Author: Klaas Vandenberghe ( @PowerDBAKlaas )
            Website: https://dbatools.io
            Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
            License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0
 
        .LINK
            https://dbatools.io/Get-DbaXESession
 
        .EXAMPLE
            Get-DbaXESession -SqlInstance ServerA\sql987
 
            Returns a custom object with ComputerName, SQLInstance, Session, StartTime, Status and other properties.
 
        .EXAMPLE
            Get-DbaXESession -SqlInstance ServerA\sql987 | Format-Table ComputerName, SqlInstance, Session, Status -AutoSize
 
            Returns a formatted table displaying ComputerName, SqlInstance, Session, and Status.
 
        .EXAMPLE
            'ServerA\sql987','ServerB' | Get-DbaXESession
 
            Returns a custom object with ComputerName, SqlInstance, Session, StartTime, Status and other properties, from multiple SQL instances.
 
    #>

    [CmdletBinding()]
    param (
        [parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter[]]$SqlInstance,
        [PSCredential]$SqlCredential,
        [Alias("Sessions")]
        [object[]]$Session,
        [switch][Alias('Silent')]$EnableException
    )

    begin {
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias Get-DbaXEsSession
    }

    process {

        foreach ($instance in $SqlInstance) {
            try {
                Write-Message -Level Verbose -Message "Connecting to $instance."
                $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 11
            }
            catch {
                Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue
            }

            $SqlConn = $server.ConnectionContext.SqlConnectionObject
            $SqlStoreConnection = New-Object Microsoft.SqlServer.Management.Sdk.Sfc.SqlStoreConnection $SqlConn
            $XEStore = New-Object  Microsoft.SqlServer.Management.XEvent.XEStore $SqlStoreConnection
            Write-Message -Level Verbose -Message "Getting XEvents Sessions on $instance."

            $xesessions = $XEStore.sessions

            if ($Session) {
                $xesessions = $xesessions | Where-Object { $_.Name -in $Session }
            }

            foreach ($x in $xesessions) {
                $status = switch ($x.IsRunning) { $true { "Running" } $false { "Stopped" } }
                $files = $x.Targets.TargetFields | Where-Object Name -eq Filename | Select-Object -ExpandProperty Value

                $filecollection = $remotefile = @()

                if ($files) {
                    foreach ($file in $files) {
                        if ($file -notmatch ':\\' -and $file -notmatch '\\\\') {
                            $directory = $server.ErrorLogPath.TrimEnd("\")
                            $file = "$directory\$file"
                        }
                        $filecollection += $file
                        $remotefile += Join-AdminUnc -servername $server.netName -filepath $file
                    }
                }

                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name ComputerName -Value $server.NetName
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name InstanceName -Value $server.ServiceName
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name SqlInstance -Value $server.DomainInstanceName
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name Status -Value $status
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name Session -Value $x.Name
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name TargetFile -Value $filecollection
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name RemoteTargetFile -Value $remotefile
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name Parent -Value $server
                Add-Member -Force -InputObject $x -MemberType NoteProperty -Name Store -Value $XEStore
                Select-DefaultView -InputObject $x -Property ComputerName, InstanceName, SqlInstance, Name, Status, StartTime, AutoStart, State, Targets, TargetFile, Events, MaxMemory, MaxEventSize
                try {
                    $xesessions.Refresh()
                } catch {
                }
            }
        }
    }
}