WorkspaceDb Interface
A SQLite database in a Workspace containing named resources that the application is configured to use. Resources are referred to by their WorkspaceResourceNames and can represent any number of things, including:
- Fonts and TextStyles used when placing TextAnnotations.
- GeographicCRSes used to define the coordinate reference system of an iTwin.
- SettingsDictionary's that contribute to the settings.
- Files that can be extracted temporarily to the local file system to be accessed by programs directly from disk.
Ultimately, each resource is stored in one of the following formats:
- A
string, which is often a stringifiedJSONrepresentation of the resource; - A binary
blob; or - An embedded file.
Strings and blobs can be accessed directly using getString and getBlob. Files must first be copied to the local file system using getFile, and should be avoided unless the software that uses them is written to access them from disk.
A WorkspaceDb resides in a WorkspaceContainer that can be published to the cloud. Once published, the WorkspaceDb becomes immutable.
However, multiple versions of a single WorkspaceDb can be created, allowing the Workspace contents to evolve over time.
WorkspaceDbs use semantic versioning.
The set of available WorkspaceDbs available for use for specific purposes are defined in the Workspace's Settings. You can obtain
a single WorkspaceDb using getWorkspaceDb, but more commonly you will use getWorkspaceDbs to obtain
a list of all of the WorkspaceDbs, sorted by priority, that correspond to a given SettingName.
You can create new WorkspaceDbs (or new versions of existing WorkspaceDbs) using WorkspaceEditor.
Methods
| Name | Description | |
|---|---|---|
| close(): void | Close the underlying sqliteDb. | |
| getBlob(rscName: string): undefined | Uint8Array | Look up a binary resource by name, if one exists. | |
| getFile(rscName: string, targetFileName?: string): undefined | string | Extract a local copy of a file resource from this WorkspaceDb, if present. | |
| getString(rscName: string): undefined | string | Look up a string resource by name, if one exists. | |
| open(): void | Open the underlying sqliteDb to perform a query. | |
| prefetch(opts?: CloudSqlite.PrefetchProps): CloudSqlite.CloudPrefetch | Ensure that the contents of this WorkspaceDb are downloaded into the local cache so that it may be accessed offline. |
|
| queryResources(args: WorkspaceDbQueryResourcesArgs): void | Find resources of a particular type with names matching a specified pattern. |
Properties
| Name | Type | Description | |
|---|---|---|---|
| container Readonly | WorkspaceContainer | The WorkspaceContainer in which this db resides. | |
| dbFileName Readonly | string | The name by which the WorkspaceDb can be opened. | |
| dbName Readonly | string | The base name of this WorkspaceDb, without version | |
| isOpen Readonly | boolean | Whether the underlying sqliteDb is currently opened. | |
| manifest Readonly | WorkspaceDbManifest | The manifest that describes the contents and context of this WorkspaceDb. | |
| onClose Readonly | BeEvent<() => void> | An event raised before this WorkspaceDb is closed. | |
| sqliteDb Readonly | SQLiteDb | The underlying SQLite database that stores this WorkspaceDb's resources. | |
| version Readonly | string | The version of this WorkspaceDb |
Defined in
Last Updated: 21 November, 2024