WorkflowPersistenceService.UnlockWorkflowInstanceState(Activity) Method

Definition

Namespace:

System.Workflow.Runtime.Hosting

Assembly:

System.Workflow.Runtime.dll

When overridden in a derived class, unlocks the workflow instance state.

protected public:
 abstract void UnlockWorkflowInstanceState(System::Workflow::ComponentModel::Activity ^ rootActivity);

protected internal abstract void UnlockWorkflowInstanceState (System.Workflow.ComponentModel.Activity rootActivity);

abstract member UnlockWorkflowInstanceState : System.Workflow.ComponentModel.Activity -> unit

Protected Friend MustOverride Sub UnlockWorkflowInstanceState (rootActivity As Activity)

Parameters

rootActivity

Activity

The root activity of the workflow instance.

Examples

The following example demonstrates an implementation of the UnlockWorkflowInstanceState method. This example is from the Custom Persistence Service sample, from the FilePersistenceService.cs file. For more information, see Custom Persistence Service Sample.

// Unlock the workflow instance state.
// Instance state locking is necessary when multiple runtimes share instance persistence store
protected override void UnlockWorkflowInstanceState(Activity state)
{
    //File locking is not supported in this sample
}

' unlock workflow instance state.  
' instance state locking is necessary when multiple runtimes share instance persistence store
Protected Overrides Sub UnlockWorkflowInstanceState(ByVal rootActivity As System.Workflow.ComponentModel.Activity)
    ' File locking is not supported in this sample
End Sub

Remarks

This method is abstract, so it does not contain a default implementation on locking and unlocking.

While implementing a custom persistence service, if you want to implement a locking scheme you will need to override this method and provide a locking-unlocking mechanism in the SaveWorkflowInstanceState method based on the value of the unlock parameter.