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Get-Transaction

JuanPablo Jofre|Last Updated: 12/17/2016
|
3 Contributors

SYNOPSIS

Gets the current (active) transaction.

SYNTAX

Get-Transaction [<CommonParameters>]

DESCRIPTION

The Get-Transaction cmdlet gets an object that represents the current transaction in the session.

This cmdlet never returns more than one object, because only one transaction is active at a time. If you start one or more independent transactions (by using the Independent parameter of Start-Transaction), the most recently started transaction is active, and that is the transaction that Get-Transaction returns.

When all active transactions have either been rolled back or committed, this cmdlet shows the transaction that was most recently active in the session.

This cmdlet is one of a set of cmdlets that support the transactions feature in Windows PowerShell. For more information, see about_Transactions.

EXAMPLES

Example 1: Get the current transaction

PS C:\> Start-Transaction
PS C:\> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ------
Error                1                 Active

This command uses the Get-Transaction cmdlet to get the current transaction.

Example 2: Show the properties and methods of the transaction object

PS C:\> Get-Transaction | Get-Member

Name               MemberType Definition
----               ---------- ----------
Dispose            Method     System.Void Dispose(), System.Void Dispose(Boolean disposing)
Equals             Method     System.Boolean Equals(Object obj)
GetHashCode        Method     System.Int32 GetHashCode()
GetType            Method     System.Type GetType()
ToString           Method     System.String ToString()
IsCommitted        Property   System.Boolean IsCommitted {get;}
IsRolledBack       Property   System.Boolean IsRolledBack {get;}
RollbackPreference Property   System.Management.Automation.RollbackSeverity RollbackPreference {get;}
SubscriberCount    Property   System.Int32 SubscriberCount {get;set;}

This command uses the Get-Member cmdlet to show the properties and methods of the transaction object.

Example 3: Show the property values of a rolled back transaction

PS C:\> cd hklm:\software
HKLM:\SOFTWARE> Start-Transaction
HKLM:\SOFTWARE> New-Item MyCompany -UseTransaction
HKLM:\SOFTWARE> Undo-Transaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ----------
Error                0                 RolledBack

This command shows the property values of a transaction object for a transaction that has been rolled back.

Example 4: Show the property values of a committed transaction

PS C:\> cd hklm:\software
HKLM:\SOFTWARE> Start-Transaction
HKLM:\SOFTWARE> New-Item MyCompany -UseTransaction
HKLM:\SOFTWARE> Complete-Transaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ---------
Error                1                 Committed

This command shows the property values of a transaction object for a transaction that has been committed.

Example 5: Start a transaction while another is in progress

PS C:\> cd hklm:\software
HKLM:\SOFTWARE> Start-Transaction
HKLM:\SOFTWARE> New-Item MyCompany -UseTransaction
HKLM:\SOFTWARE> Start-Transaction
HKLM:\SOFTWARE> New-Item MyCompany2 -UseTransaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ------
Error                2                 Active

HKLM:\SOFTWARE> Complete-Transaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ------
Error                1                 Active

HKLM:\SOFTWARE> Complete-Transaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   Status
------------------   ---------------   ---------
Error                1                 Committed

This example shows the effect on the transaction object of starting a transaction while another transaction is in progress. Typically, this happens when a script that runs a transaction includes a function or calls a script that contains another complete transaction.

Unless the second Start-Transaction command includes the Independent parameter, Start-Transaction does not create a new transaction. Instead, it adds a second subscriber to the original transaction.

The first Start-Transaction command starts the transaction. A New-Item command with the UseTransaction parameter is part of the transaction.

A second Start-Transaction command adds a subscriber to the transaction. The next New-Item command is also part of the transaction.

The first Get-Transaction command shows the multi-subscriber transaction. Notice that the subscriber count is 2.

The first Complete-Transaction command does not commit the transaction, but it reduces the subscriber count to 1.

The second Complete-Transaction command commits the transaction.

Example 6: Start an independent transaction while another is in progress

PS C:\>
HKLM:\SOFTWARE> Start-Transaction
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   IsRolledBack   IsCommitted
------------------   ---------------   ------------   -----------
Error                1                 False          False

HKLM:\SOFTWARE> Start-Transaction -Independent
HKLM:\SOFTWARE> Get-Transaction

RollbackPreference   SubscriberCount   IsRolledBack   IsCommitted
------------------   ---------------   ------------   -----------
Error                1                 False          False

HKLM:\SOFTWARE> Complete-Transaction
HKLM:\SOFTWARE> Get-Transaction
HKLM:\SOFTWARE> Complete-Transaction
HKLM:\SOFTWARE> Get-Transaction

This example shows the effect on the transaction object of starting an independent transaction while another transaction is in progress.

The first Start-Transaction command starts the transaction. A New-Item command with the UseTransaction parameter is part of the transaction.

A second Start-Transaction command adds a subscriber to the transaction. The next New-Item command is also part of the transaction.

The first Get-Transaction command shows the multi-subscriber transaction. Note that the subscriber count is 2.

The Complete-Transaction command reduces the subscriber count to 1, but it does not commit the transaction.

The second Complete-Transaction command commits the transaction.

PARAMETERS

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).

INPUTS

None

You cannot pipe objects to this cmdlet.

OUTPUTS

System.Management.Automation.PSTransaction

This cmdlet returns an object that represents the current transaction.

NOTES

Complete-Transaction

Start-Transaction

Undo-Transaction

Use-Transaction

New-Item

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