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PowerPlan.psm1
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PowerPlan.psm1
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function Get-Powerplan
{
<#
.Synopsis
Get a Powerplan by name or all of them
.DESCRIPTION
This cmdlet queries the CIM class Win32_PowerPlan. See also Set-PowerPlan cmdlet
.EXAMPLE
Get-Powerplan
This command will output all powerplans:
Caption :
Description : Automatically balances performance with energy consumption on capable hardware.
ElementName : Balanced
InstanceID : Microsoft:PowerPlan\{381b4222-f694-41f0-9685-ff5bb260df2e}
IsActive : False
PSComputerName :
Caption :
Description : Favors performance, but may use more energy.
ElementName : High performance
InstanceID : Microsoft:PowerPlan\{8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c}
IsActive : True
PSComputerName :
Caption :
Description : Saves energy by reducing your computer’s performance where possible.
ElementName : Power saver
InstanceID : Microsoft:PowerPlan\{a1841308-3541-4fab-bc81-f71556f20b4a}
IsActive : False
PSComputerName :
.EXAMPLE
Get-Powerplan -PlanName high*
This command will output all plans that begins with high
Caption :
Description : Favors performance, but may use more energy.
ElementName : High performance
InstanceID : Microsoft:PowerPlan\{8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c}
IsActive : True
PSComputerName :
.EXAMPLE
Get-PowerPlan -PlanName high* -ComputerName "Server1","Server2"
Will output the powerplan with name like high for server1 and server2
.EXAMPLE
Get-PowerPlan -Active
Will output the active powerplan
.OUTPUTS
CimInstance
.NOTES
Powerplan and performance
.COMPONENT
Powerplan
.ROLE
Powerplan
.FUNCTIONALITY
This cmdlet queries the CIM class Win32_PowerPlan
#>
[cmdletbinding()]
[OutputType([CimInstance[]])]
Param(
[Parameter(
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
ValueFromRemainingArguments=$false
)]
[Alias("ElementName")]
[string]$PlanName = "*"
,
[Parameter(
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
ValueFromRemainingArguments=$false
)]
[string[]]$ComputerName,
[switch]$Active
)
Begin
{
$f = $MyInvocation.InvocationName
Write-Verbose -Message "$f - START"
$GetCimInstance = @{
Namespace = "root\cimv2\power"
ClassName = "Win32_PowerPlan"
}
if ($ComputerName)
{
$GetCimInstance.Add("ComputerName",$ComputerName)
}
if ($Active)
{
$GetCimInstance.Add("Filter",'IsActive="True"')
}
}
Process
{
if ($PlanName)
{
Get-CimInstance @GetCimInstance | Where-Object ElementName -Like "$PlanName"
}
else
{
Get-CimInstance @GetCimInstance
}
}
End
{
Write-Verbose -Message "$f - END"
}
}
function Set-PowerPlan
{
<#
.Synopsis
Sets a Powerplan by name or by value provided from the pipeline
.DESCRIPTION
This cmdlet invokes the CIM-method Activate in class Win32_PowerPlan. See also Get-PowerPlan cmdlet
.EXAMPLE
Set-PowerPlan -PlanName high*
This will set the current powerplan to High for the current computer
.EXAMPLE
Get-Powerplan -PlanName "Power Saver" | Set-PowerPlan
Will set the powerplan to "Power Saver" for current computer
.EXAMPLE
Get-Powerplan -PlanName "Power Saver" -ComputerName "Server1","Server2" | Set-PowerPlan
This will set the current powerpla to "Power Saver" for the computers Server1 and Server2
.EXAMPLE
Set-PowerPlan -PlanName "Power Saver" -ComputerName "Server1","Server2"
This will set the current powerpla to "Power Saver" for the computers Server1 and Server2
.NOTES
Powerplan and performance
.COMPONENT
Powerplan
.ROLE
Powerplan
.FUNCTIONALITY
This cmdlet invokes CIM-methods in the class Win32_PowerPlan
#>
[cmdletbinding(
SupportsShouldProcess=$true,
ConfirmImpact='Medium'
)]
Param(
[Parameter(
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
ValueFromRemainingArguments=$false
)]
[Alias("ElementName")]
[string]$PlanName = "*"
,
[Parameter(
ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true,
ValueFromRemainingArguments=$false
)]
[Alias("PSComputerName")]
[string[]]$ComputerName
)
Begin
{
$f = $MyInvocation.InvocationName
Write-Verbose -Message "$f - START"
$GetCimInstance = @{
Namespace = "root\cimv2\power"
ClassName = "Win32_PowerPlan"
}
if ($ComputerName)
{
$GetCimInstance.Add("ComputerName",$ComputerName)
}
$InvokeCimMethod = @{
MethodName = "Activate"
}
if ($WhatIfPreference)
{
$InvokeCimMethod.Add("WhatIf",$true)
}
}
Process
{
Write-Verbose -Message "$f - ElementName=$PlanName"
$CimObjectPowerPlan = Get-CimInstance @GetCimInstance | Where-Object ElementName -like "$PlanName"
foreach ($Instance in $CimObjectPowerPlan)
{
if ($pscmdlet.ShouldProcess($Instance))
{
$null = Invoke-CimMethod -InputObject $Instance @InvokeCimMethod
}
}
if (-not $CimObjectPowerPlan)
{
Write-Warning -Message "Unable to find powerplan $PlanName"
}
}
End
{
Write-Verbose -Message "$f - END"
}
}
<#
DSC Resource
Manages the power plan selection for a computer.
#>
[DscResource()]
class PowerPlan
{
<#
This property is the name of an available power plan.
#>
[DscProperty(Key)]
[string]$Name
<#
Sets the specified power plan as active.
#>
[void] Set()
{
Set-PowerPlan $this.Name
}
<#
Tests if the machine is using the specified power plan.
#>
[bool] Test()
{
if ((Get-PowerPlan -Active).ElementName -eq $this.Name)
{
return $true
}
else
{
return $false
}
}
<#
Returns an instance of this class to identify the active plan.
#>
[PowerPlan] Get()
{
$this.Name = (Get-PowerPlan -Active).ElementName
return $this
}
}