functions/Copy-DbaExtendedEvent.ps1

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function Copy-DbaExtendedEvent {
    <#
    .SYNOPSIS
        Migrates SQL Extended Event Sessions except the two default sessions, AlwaysOn_health and system_health.
 
    .DESCRIPTION
        Migrates SQL Extended Event Sessions except the two default sessions, AlwaysOn_health and system_health.
 
        By default, all non-system Extended Events are migrated.
 
    .PARAMETER Source
        Source SQL Server. You must have sysadmin access and server version must be SQL Server version 2000 or higher.
 
    .PARAMETER SourceSqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER Destination
        Destination SQL Server. You must have sysadmin access and the server must be SQL Server 2000 or higher.
 
    .PARAMETER DestinationSqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER XeSession
        The Extended Event Session(s) to process. This list is auto-populated from the server. If unspecified, all Extended Event Sessions will be processed.
 
    .PARAMETER ExcludeXeSession
        The Extended Event Session(s) to exclude. This list is auto-populated from the server.
 
    .PARAMETER WhatIf
        If this switch is enabled, no actions are performed but informational messages will be displayed that explain what would happen if the command were to run.
 
    .PARAMETER Confirm
        If this switch is enabled, you will be prompted for confirmation before executing any operations that change state.
 
    .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.
 
    .PARAMETER Force
        If this switch is enabled, existing Extended Events sessions on Destination with matching names from Source will be dropped.
 
    .NOTES
        Tags: Migration, ExtendedEvent, XEvent
        Author: Chrissy LeMaire (@cl), netnerds.net
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
        Requires: sysadmin access on SQL Servers
 
    .LINK
        https://dbatools.io/Copy-DbaExtendedEvent
 
    .EXAMPLE
        PS C:\> Copy-DbaExtendedEvent -Source sqlserver2014a -Destination sqlcluster
 
        Copies all Extended Event sessions from sqlserver2014a to sqlcluster using Windows credentials.
 
    .EXAMPLE
        PS C:\> Copy-DbaExtendedEvent -Source sqlserver2014a -Destination sqlcluster -SourceSqlCredential $cred
 
        Copies all Extended Event sessions from sqlserver2014a to sqlcluster using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster.
 
    .EXAMPLE
        PS C:\> Copy-DbaExtendedEvent -Source sqlserver2014a -Destination sqlcluster -WhatIf
 
        Shows what would happen if the command were executed.
 
    .EXAMPLE
        PS C:\> Copy-DbaExtendedEvent -Source sqlserver2014a -Destination sqlcluster -XeSession CheckQueries, MonitorUserDefinedException
 
        Copies only the Extended Events named CheckQueries and MonitorUserDefinedException from sqlserver2014a to sqlcluster.
 
#>

    [CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess = $true)]
    param (
        [parameter(Mandatory)]
        [DbaInstanceParameter]$Source,
        [parameter(Mandatory)]
        [DbaInstanceParameter[]]$Destination,
        [PSCredential]
        $SourceSqlCredential,
        [PSCredential]
        $DestinationSqlCredential,
        [object[]]$XeSession,
        [object[]]$ExcludeXeSession,
        [switch]$Force,
        [Alias('Silent')]
        [switch]$EnableException
    )
    begin {
        try {
            $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential -MinimumVersion 11
        } catch {
            Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $Source
            return
        }
        $sourceSqlConn = $sourceServer.ConnectionContext.SqlConnectionObject
        $sourceSqlStoreConnection = New-Object Microsoft.SqlServer.Management.Sdk.Sfc.SqlStoreConnection $sourceSqlConn
        $sourceStore = New-Object  Microsoft.SqlServer.Management.XEvent.XEStore $sourceSqlStoreConnection
        $storeSessions = $sourceStore.Sessions | Where-Object { $_.Name -notin 'AlwaysOn_health', 'system_health' }
        if ($XeSession) {
            $storeSessions = $storeSessions | Where-Object Name -In $XeSession
        }
        if ($ExcludeXeSession) {
            $storeSessions = $storeSessions | Where-Object Name -NotIn $ExcludeXeSession
        }
    }
    process {
        if (Test-FunctionInterrupt) { return }
        foreach ($destinstance in $Destination) {
            try {
                $destServer = Connect-SqlInstance -SqlInstance $destinstance -SqlCredential $DestinationSqlCredential -MinimumVersion 11
            } catch {
                Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $destinstance -Continue
            }

            $destSqlConn = $destServer.ConnectionContext.SqlConnectionObject
            $destSqlStoreConnection = New-Object Microsoft.SqlServer.Management.Sdk.Sfc.SqlStoreConnection $destSqlConn
            $destStore = New-Object  Microsoft.SqlServer.Management.XEvent.XEStore $destSqlStoreConnection

            Write-Message -Level Verbose -Message "Migrating sessions."
            foreach ($session in $storeSessions) {
                $sessionName = $session.Name

                $copyXeSessionStatus = [pscustomobject]@{
                    SourceServer      = $sourceServer.Name
                    DestinationServer = $destServer.Name
                    Name              = $sessionName
                    Type              = "Extended Event"
                    Status            = $null
                    Notes             = $null
                    DateTime          = [DbaDateTime](Get-Date)
                }

                if ($null -ne $destStore.Sessions[$sessionName]) {
                    if ($force -eq $false) {
                        if ($Pscmdlet.ShouldProcess($destinstance, "Extended Event Session '$sessionName' was skipped because it already exists on $destinstance.")) {
                            $copyXeSessionStatus.Status = "Skipped"
                            $copyXeSessionStatus.Notes = "Already exists"
                            $copyXeSessionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject

                            Write-Message -Level Verbose -Message "Extended Event Session '$sessionName' was skipped because it already exists on $destinstance."
                            Write-Message -Level Verbose -Message "Use -Force to drop and recreate."
                        }
                        continue
                    } else {
                        if ($Pscmdlet.ShouldProcess($destinstance, "Attempting to drop $sessionName")) {
                            Write-Message -Level Verbose -Message "Extended Event Session '$sessionName' exists on $destinstance."
                            Write-Message -Level Verbose -Message "Force specified. Dropping $sessionName."

                            try {
                                $destStore.Sessions[$sessionName].Drop()
                            } catch {
                                $copyXeSessionStatus.Status = "Failed"
                                $copyXeSessionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject

                                Stop-Function -Message "Unable to drop session. Moving on." -Target $sessionName -ErrorRecord $_ -Continue
                            }
                        }
                    }
                }

                if ($Pscmdlet.ShouldProcess($destinstance, "Migrating session $sessionName")) {
                    try {
                        $sql = $session.ScriptCreate().GetScript() | Out-String

                        Write-Message -Level Debug -Message $sql
                        Write-Message -Level Verbose -Message "Migrating session $sessionName."
                        $null = $destServer.Query($sql)

                        if ($session.IsRunning -eq $true) {
                            $destStore.Sessions.Refresh()
                            $destStore.Sessions[$sessionName].Start()
                        }

                        $copyXeSessionStatus.Status = "Successful"
                        $copyXeSessionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject
                    } catch {
                        $copyXeSessionStatus.Status = "Failed"
                        $copyXeSessionStatus | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject

                        Stop-Function -Message "Unable to create session." -Target $sessionName -ErrorRecord $_
                    }
                }
            }
        }
    }
    end {
        Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias Copy-SqlExtendedEvent
    }
}