API Reference > imodeljs-backend > iModels > ConcurrencyControl > ConcurrencyControl.LocksManager ConcurrencyControl.LocksManager Class Beta Locks manager This class is used to acquire certain kinds of locks preemptively. It can also be used to query what locks are held. See ConcurrencyControl.requestResources for how to acquire locks as they are needed. Methods Name Description holdsLock(lock: LockProps): boolean Returns true if the specified lock is held. lockCodeSpecs(requestContext: AuthorizedClientRequestContext): Promise<void> Obtain the CodeSpec lock. lockModels(requestContext: AuthorizedClientRequestContext, models: ModelProps[]): Promise<void> Lock the specified models exclusively. lockSchema(requestContext: AuthorizedClientRequestContext): Promise<void> Obtain the schema lock. Properties Name Type Description hasCodeSpecsLock Accessor ReadOnly boolean Returns true if the CodeSpecs lock is held. hasSchemaLock Accessor ReadOnly boolean Returns true if the schema lock is held. Defined in core/backend/src/ConcurrencyControl.ts Line 1282 Last Updated: 29 November, 2022