How to Acquire a Lock on a SEDO-Enabled Object

Article
10/10/2022

To Acquire an Explicit Lock on a SEDO-enabled Object

Create an instance of the SMS_ObjectLock WMI class
Get the method parameters object for the RequestLock method.
Assign the object path of the object you wish to lock to the ObjectRelPath property.
Set the RequestTransfer property to true.
Create an InvokeMethodOptions object instance. On the Context property, add a name/value pair. The name must be "ObjectLockContext" and the value must be a unique value such as a Guid. Add another name/value pair with "MachineName" and the name of the computer requesting the lock.
Call InvokeMethod on the SMS_ObjectLock instance.
InvokeMethod will return a SMS_ObjectLockRequest instance. Check the RequestState and LockState properties to get more information on the success or failure of the request.

Example

The following example requests an explicit lock on a SMS_ConfigurationItem object instance.

 class Program  
 {  
     static void Main(string[] args)   
     {  
         ManagementScope scope = new ManagementScope(@"\\siteservername\root\sms\site_ABC");  
         RequestLock(scope);   
     }  

     public static void RequestLock(ManagementScope scope)   
     {  
         ManagementPath path = new ManagementPath("SMS_ObjectLock");  
         ManagementClass objectLock = new ManagementClass(scope, path, null);   

         ManagementBaseObject inParams = objectLock.GetMethodParameters("RequestLock");  
         inParams["ObjectRelPath"] = "SMS_ConfigurationItem.CI_ID=30";  
         inParams["RequestTransfer"] = true;   

         InvokeMethodOptions options = new InvokeMethodOptions();  
         options.Context.Add("ObjectLockContext", Guid.NewGuid().ToString());  
         options.Context.Add("MachineName", "RequestingComputer");  

         ManagementBaseObject result = objectLock.InvokeMethod("RequestLock", inParams, options);     

     }  
}

The SMS_ObjectLockRequest object contains the following properties:

Property	Description
RequestID	Unique identifier of the request.
ObjectRelPath	The path of the object for which the lock is requested.
RequestState	Indicates the success or failure of the request.
LockState	Indicates the current state of the requested lock.
AssignedUser	Indicates the currently assigned user of the requested lock.
AssignedObjectLockContext	Indicates ObjectLockContext the lock is currently assigned to.
AssignedMachine	Indicates the currently assigned computer of the requested lock.
AssignedSiteCode	Indicates the currently site of the requested lock.
AssignedTimeUTC	Indicates the time at which the requested lock was assigned.

RequestState
The table below displays the possible request state values. Request states Granted, GrantedAfterTimeout and GrantedLockWasOrphaned indicate a successful request and the user can then make and save modifications to the object. All other requests indicate error.

RequestStateID	RequestStateName
0	Unknown
2	Requested
3	RequestedCanceled
4	ResponseReceived
10	Granted
11	GrantedAfterTimeout
12	GrantedLockWasOrphaned
20	DeniedLockAlreadyAssigned
21	DeniedInvalidObjectVersion
22	DeniedLockNotFound
23	DeniedLockNotLocal
24	DeniedRequestTimedOut
50	Error
52	ErrorRequestNotFound
53	ErrorRequestTimedOut

LockState
The table below displays the possible lock state values.

LockStateID	LockStateName
0	Unassigned
1	Assigned
2	Requested
3	PendingAssignment
4	TimedOut
5	NotFound

Compiling the Code

The C# example requires:

Namespaces

System

System.Management

Assembly

Robust Programming

For more information about error handling, see About Configuration Manager Errors.

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