Register-CimIndicationEvent

Subscribes to indications using a filter expression or a query expression.

Syntax

Register-CimIndicationEvent
        [-Namespace <String>]
        [-ClassName] <String>
        [-OperationTimeoutSec <UInt32>]
        [-ComputerName <String>]
        [[-SourceIdentifier] <String>]
        [[-Action] <ScriptBlock>]
        [-MessageData <PSObject>]
        [-SupportEvent]
        [-Forward]
        [-MaxTriggerCount <Int32>]
        [<CommonParameters>]
Register-CimIndicationEvent
        [-Namespace <String>]
        [-ClassName] <String>
        [-OperationTimeoutSec <UInt32>]
        -CimSession <CimSession>
        [[-SourceIdentifier] <String>]
        [[-Action] <ScriptBlock>]
        [-MessageData <PSObject>]
        [-SupportEvent]
        [-Forward]
        [-MaxTriggerCount <Int32>]
        [<CommonParameters>]
Register-CimIndicationEvent
        [-Namespace <String>]
        [-Query] <String>
        [-QueryDialect <String>]
        [-OperationTimeoutSec <UInt32>]
        -CimSession <CimSession>
        [[-SourceIdentifier] <String>]
        [[-Action] <ScriptBlock>]
        [-MessageData <PSObject>]
        [-SupportEvent]
        [-Forward]
        [-MaxTriggerCount <Int32>]
        [<CommonParameters>]
Register-CimIndicationEvent
        [-Namespace <String>]
        [-Query] <String>
        [-QueryDialect <String>]
        [-OperationTimeoutSec <UInt32>]
        [-ComputerName <String>]
        [[-SourceIdentifier] <String>]
        [[-Action] <ScriptBlock>]
        [-MessageData <PSObject>]
        [-SupportEvent]
        [-Forward]
        [-MaxTriggerCount <Int32>]
        [<CommonParameters>]

Description

The Register-CimIndicationEvent cmdlet subscribes to indications using an indication class name or a query expression. Use the SourceIdentifier parameter give a name to the subscription.

This cmdlet returns an EventSubscription object. You can use this object to cancel the subscription.

Examples

Example 1: Register the events generated by a class

This example subscribes to the events generated by the class named Win32_ProcessStartTrace. This class raises an event whenever a process starts.

Register-CimIndicationEvent -ClassName 'Win32_ProcessStartTrace' -SourceIdentifier "ProcessStarted"
Get-Event -SourceIdentifier "ProcessStarted"

The Get-Event cmdlet gets the events with ProcessStarted subscription. For more information, see Get-Event.

Note

For this example, you must run PowerShell as an Administrator.

Example 2: Register the events using a query

This example uses a query to subscribe to an event generated whenever there is a change in the instance of a class named Win32_LocalTime.

$query = "SELECT * FROM CIM_InstModification WHERE TargetInstance ISA 'Win32_LocalTime'"
Register-CimIndicationEvent -Query $query -SourceIdentifier "Timer"

Example 3: Run a script when the event arrives

This example shows how to use an action in response to an event. The variable $action holds the script block for Action, which uses the $event variable to access the event received from CIM.

$action = {
  $name = $event.SourceEventArgs.NewEvent.ProcessName
  $id = $event.SourceEventArgs.NewEvent.ProcessId
  Write-Host -Object "New Process Started : Name = $name
 ID = $id"
}
Register-CimIndicationEvent -ClassName 'Win32_ProcessStartTrace' -SourceIdentifier "ProcessStarted" -Action $action

For more information, see Win32_ProcessStartTrace.

Example 4: Register the events on a remote computer

This example subscribes to events on a remote computer named Server01. Events received from the CIM server are stored in the event queue in the current PowerShell session and then runs a local Get-Event to retrieve the events.

Register-CimIndicationEvent -ClassName 'Win32_ProcessStartTrace' -SourceIdentifier "ProcessStarted" -ComputerName Server01
Get-Event -SourceIdentifier "ProcessStarted"

Parameters

-Action

Specifies the commands that handle the events. The commands specified by this parameter run when an event is raised, instead of sending the event to the event queue. Enclose the commands in braces ({}) to create a script block.

The script block specified with Action can include the $Event, $EventSubscriber, $Sender, $SourceEventArgs, and $SourceArgs automatic variables, which provide information about the event to the Action script block. For more information, see About Automatic Variables.

Type:ScriptBlock
Position:1
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-CimSession

Runs the command using the specified CIM session. Enter a variable that contains the CIM session, or a command that creates or gets the CIM session, such as the New-CimSession or Get-CimSession cmdlets. For more information, see about_CimSession.

Type:CimSession
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-ClassName

Specifies the indication class to which you are subscribing. You can use tab completion to browse the list of classes, because PowerShell gets a list of classes from the local WMI server to provide a list of class names.

Type:String
Position:0
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-ComputerName

Specifies the name of the computer on which you want to run the CIM operation. You can specify a fully qualified domain name (FQDN), a NetBIOS name, or an IP address.

If you specify this parameter, the cmdlet creates a temporary session to the specified computer using the WsMan protocol. If you do not specify this parameter, the cmdlet performs operation on the local system using Component Object Model (COM).

If multiple operations are being performed on the same computer, connect using a CIM session for better performance.

Type:String
Aliases:CN, ServerName
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-Forward

Indicates that events for the subscription are forwarded to the session on the local computer. Use this parameter when you are registering for events on a remote computer or in a remote session.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-MaxTriggerCount

Parameter to indicate that the subscriber should be auto-unregistered after being triggered for specified times. If the value is equal or less than zero, there is no limit on the number of times the event can be triggered without being unregistered.

Type:Int32
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-MessageData

Specifies any additional data to associate with this event subscription. The value of this parameter appears in the MessageData property of all the events associated with this subscription.

Type:PSObject
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-Namespace

Specifies the namespace for the CIM operation. The default namespace is root/cimv2. You can use tab completion to browse the list of namespaces, because PowerShell gets a list of namespaces from the local WMI server to provide the list of namespaces.

Type:String
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-OperationTimeoutSec

Specifies the amount of time that the cmdlet waits for a response from the computer. By default, the value of this parameter is 0, which means that the cmdlet uses the default timeout value for the server.

If the OperationTimeoutSec parameter is set to a value less than the robust connection retry timeout of 3 minutes, network failures that last more than the value of the OperationTimeoutSec parameter are not recoverable, because the operation on the server times out before the client can reconnect.

Type:UInt32
Aliases:OT
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-Query

Specifies a query to run on the CIM server. If the value specified contains double quotes ", single quotes ', or a backslash \, you must escape those characters by prefixing them with the backslash character. If the value specified uses the WQL LIKE operator, then you must escape the following characters by enclosing them in square brackets []: percent %, underscore _, or opening square bracket [.

Type:String
Position:0
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-QueryDialect

Specifies the query language used for the Query parameter. The acceptable values for this parameter are: WQL or CQL. The default value is WQL.

Type:String
Position:Named
Default value:WQL
Accept pipeline input:False
Accept wildcard characters:False

-SourceIdentifier

Specifies a name for the subscription. The name that you specify must be unique in the current session. The default value is a GUID that PowerShell assigns. This value appears in the value of the SourceIdentifier property of the subscriber object and of all event objects associated with this subscription.

Type:String
Position:1
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

-SupportEvent

Indicates that the event subscription is hidden. Use this parameter when the current subscription is part of a more complex event registration mechanism and it should not be discovered independently.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False

Inputs

None

This cmdlet accepts no input objects.

Outputs

Object

This cmdlet outputs an EventSubscription object.