ConcurrencyControl Namespace

Beta  

Enumeration

Name Description
ConcurrencyControl.OnConflict How to handle a conflict.

Class

Name Description
ConcurrencyControl.CodesManager Code manager.
ConcurrencyControl.ConflictResolutionPolicy The options for how conflicts are to be handled during change-merging in an OptimisticConcurrencyControlPolicy.
ConcurrencyControl.LocksManager Locks manager
ConcurrencyControl.OptimisticPolicy Specifies an optimistic concurrency policy.
ConcurrencyControl.PessimisticPolicy Specifies the pessimistic concurrency policy.
ConcurrencyControl.Request A request for locks and/or code reservations.

Interface

Name Description
ConcurrencyControl.ElementAndOpcode  
ConcurrencyControl.ModelAndOpcode  
ConcurrencyControl.RelationshipAndOpcode  

Defined in

ConcurrencyControl Class

Beta  

ConcurrencyControl enables an app to coordinate local changes with changes that are being made by others to an iModel.

Methods

Name Description
constructor(_iModel: BriefcaseDb): ConcurrencyControl    
abandonRequest(): void Abandon any pending requests for locks or codes.  
abandonResources(requestContext: AuthorizedClientRequestContext): Promise<void> Abandons any locks that are held, any Codes that are reserved, and any pending requests. Beta  
areAvailable(requestContext: AuthorizedClientRequestContext, req?: ConcurrencyControl.Request): Promise<boolean> Check to see if all of the requested resources could be acquired from iModelHub.  
areLocksAvailable(requestContext: AuthorizedClientRequestContext, req?: ConcurrencyControl.Request): Promise<boolean> Check to see if this briefcase could acquire (or already has acquired) the specified locks at that specified levels.  
buildConcurrencyControlRequestForDb(): void Schedule the shared Db lock.  
endBulkMode(rqctx: AuthorizedClientRequestContext): Promise<void> Call this when in bulk mode and before calling BriefcaseDb.saveChanges. Beta  
onElementWrite(elementClass: undefined, element: ElementProps, opcode: DbOpcode): void    
onElementWritten(_elementClass: undefined, id: string, opcode: DbOpcode): void    
onModelWrite(modelClass: undefined, model: ModelProps, opcode: DbOpcode): void    
onModelWritten(_modelClass: undefined, id: string, opcode: DbOpcode): void    
request(requestContext: AuthorizedClientRequestContext, req?: ConcurrencyControl.Request): Promise<void> Try to acquire locks and/or reserve codes from iModelHub.  
requestResources(ctx: AuthorizedClientRequestContext, elements: ConcurrencyControl.ElementAndOpcode[], models?: ConcurrencyControl.ModelAndOpcode[], relationships?: ConcurrencyControl.RelationshipAndOpcode[]): Promise<void> Request the locks and/or Codes that will be required to carry out the intended write operations.  
requestResourcesForDelete(ctx: AuthorizedClientRequestContext, elements: ElementProps[], models?: ModelProps[], relationships?: RelationshipProps[]): Promise<void> Request the locks and/or Codes that will be required to delete the specified elements and/or models. Beta  
requestResourcesForInsert(ctx: AuthorizedClientRequestContext, elements: ElementProps[], models?: ModelProps[], relationships?: RelationshipProps[]): Promise<void> Request the locks and/or Codes that will be required to insert the specified elements and/or models. Beta  
requestResourcesForUpdate(ctx: AuthorizedClientRequestContext, elements: ElementProps[], models?: ModelProps[], relationships?: RelationshipProps[]): Promise<void> Request the locks and/or Codes that will be required to update the specified elements and/or models. Beta  
setPolicy(policy: ConcurrencyControl.PessimisticPolicy | ConcurrencyControl.OptimisticPolicy): void Set the concurrency control policy.  
startBulkMode(): void Start "bulk update mode". Beta  
syncCache(requestContext: AuthorizedClientRequestContext): Promise<void> You must call this if you use classes other than ConcurrencyControl to manage locks and codes. Beta  

Properties

Name Type Description
codes Accessor ReadOnly ConcurrencyControl.CodesManager API to reserve Codes and to query the status of Codes  
hasPendingRequests Accessor ReadOnly boolean Are there pending, unprocessed requests for locks or codes?  
isBulkMode Accessor ReadOnly boolean Query if changes are being monitored in "bulk update mode".  
locks Accessor ReadOnly ConcurrencyControl.LocksManager API to acquire locks preemptively and to query the status of locks  

Defined in

Last Updated: 11 June, 2024