LifetimeContext.GetOrCreate Method

Reference

Definition

Namespace:: System.Composition.Hosting.Core

Assembly:: System.Composition.Hosting.dll

Package:: System.Composition.Hosting v9.0.0

Source:: LifetimeContext.cs

Source:: LifetimeContext.cs

Source:: LifetimeContext.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Retrieves a shared part instance with the specified ID, or if the part instance can not be found, creates and shares a part instance using the specified creator within the specified operation.

public:
 System::Object ^ GetOrCreate(int sharingId, System::Composition::Hosting::Core::CompositionOperation ^ operation, System::Composition::Hosting::Core::CompositeActivator ^ creator);

public object GetOrCreate (int sharingId, System.Composition.Hosting.Core.CompositionOperation operation, System.Composition.Hosting.Core.CompositeActivator creator);

member this.GetOrCreate : int * System.Composition.Hosting.Core.CompositionOperation * System.Composition.Hosting.Core.CompositeActivator -> obj

Public Function GetOrCreate (sharingId As Integer, operation As CompositionOperation, creator As CompositeActivator) As Object

Parameters

sharingId: Int32

The ID of the shared part.

operation: CompositionOperation

An operation in which to create a part, if necessary.

creator: CompositeActivator

An activator that can activate a new part instance, if necessary.

Returns

Object

The new or retrieved part.

Remarks

This method is lock-free if the part instance already exists. If the part instance must be created, a lock will be taken that will serialize other writes that use this method (concurrent reads will continue to be safe and lock-free). It is important that the composition, and thus lock acquisition, is strictly leaf-to-root in the lifetime tree.

Applies to

Sdílet prostřednictvím