IDocumentStorageService Interface
Packages > @fluidframework/driver-definitions > IDocumentStorageService
Interface to provide access to snapshots saved for a shared object
This API is provided for existing users, but is not recommended for new users.
To use, import via @fluidframework/driver-definitions/legacy.
For more information about our API support guarantees, see here .
Signature
export interface IDocumentStorageService extends Partial<IDisposable>
Extends: Partial<IDisposable >
Properties
| Property | Alerts | Modifiers | Type | Description |
|---|---|---|---|---|
| policies |
Alpha
|
optional, readonly
|
IDocumentStorageServicePolicies | undefined | Policies implemented/instructed by driver. |
Methods
| Method | Alerts | Modifiers | Return Type | Description |
|---|---|---|---|---|
| createBlob(file) |
Alpha
|
Promise<ICreateBlobResponse> | Creates a blob out of the given buffer | |
| downloadSummary(handle) |
Alpha
|
Promise<ISummaryTree> | Retrieves the commit that matches the packfile handle. If the packfile has already been committed and the server has deleted it this call may result in a broken promise. | |
| getSnapshot(snapshotFetchOptions) |
Alpha
|
optional
|
Promise<ISnapshot> |
Returns the snapshot which can contain other artifacts too like blob contents, ops etc. It is different from getSnapshotTree api in that, that API only returns the snapshot tree from the snapshot.
|
| getSnapshotTree(version, scenarioName) |
Alpha
|
Promise<ISnapshotTree | null> | Returns the snapshot tree. | |
| getVersions(versionId, count, scenarioName, fetchSource) |
Alpha
|
Promise<IVersion[]> | Retrieves all versions of the document starting at the specified versionId - or null if from the head | |
| readBlob(id) |
Alpha
|
Promise<ArrayBufferLike> | Reads the object with the given ID, returns content in arrayBufferLike | |
| uploadSummaryWithContext(summary, context) |
Alpha
|
Promise<string> | Uploads a summary tree to storage using the given context for reference of previous summary handle. The ISummaryHandles in the uploaded tree should have paths to indicate which summary object they are referencing from the previously acked summary. Returns the uploaded summary handle. |
Property Details
policies
Policies implemented/instructed by driver.
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
readonly policies?: IDocumentStorageServicePolicies | undefined;
Type: IDocumentStorageServicePolicies | undefined
Method Details
createBlob
Creates a blob out of the given buffer
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
createBlob(file: ArrayBufferLike): Promise<ICreateBlobResponse>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| file | ArrayBufferLike |
Returns
Return type: Promise<ICreateBlobResponse >
downloadSummary
Retrieves the commit that matches the packfile handle. If the packfile has already been committed and the server has deleted it this call may result in a broken promise.
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
downloadSummary(handle: ISummaryHandle): Promise<ISummaryTree>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| handle | ISummaryHandle |
Returns
Return type: Promise<ISummaryTree >
getSnapshot
Returns the snapshot which can contain other artifacts too like blob contents, ops etc. It is different from getSnapshotTree api in that, that API only returns the snapshot tree from the snapshot.
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
getSnapshot?(snapshotFetchOptions?: ISnapshotFetchOptions): Promise<ISnapshot>;
Parameters
| Parameter | Modifiers | Type | Description |
|---|---|---|---|
| snapshotFetchOptions | optional | ISnapshotFetchOptions | Options specified by the caller to specify and want certain behavior from the driver when fetching the snapshot. |
Returns
Return type: Promise<ISnapshot >
getSnapshotTree
Returns the snapshot tree.
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
getSnapshotTree(version?: IVersion, scenarioName?: string): Promise<ISnapshotTree | null>;
Parameters
| Parameter | Modifiers | Type | Description |
|---|---|---|---|
| version | optional | IVersion | Version of the snapshot to be fetched. |
| scenarioName | optional | string | scenario in which this api is called. This will be recorded by server and would help in debugging purposes to see why this call was made. |
Returns
Return type: Promise<ISnapshotTree | null>
getVersions
Retrieves all versions of the document starting at the specified versionId - or null if from the head
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
getVersions(versionId: string | null, count: number, scenarioName?: string, fetchSource?: FetchSource): Promise<IVersion[]>;
Parameters
| Parameter | Modifiers | Type | Description |
|---|---|---|---|
| versionId | string | null | Version id of the requested version. | |
| count | number | Number of the versions to be fetched. | |
| scenarioName | optional | string | scenario in which this api is called. This will be recorded by server and would help in debugging purposes to see why this call was made. |
| fetchSource | optional | FetchSource | Callers can specify the source of the response. For ex. Driver may choose to cache requests and serve data from cache. That will result in stale info returned. Callers can disable this functionality by passing fetchSource = noCache and ensuring that driver will return latest information from storage. |
Returns
Return type: Promise<IVersion []>
readBlob
Reads the object with the given ID, returns content in arrayBufferLike
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
readBlob(id: string): Promise<ArrayBufferLike>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| id | string |
Returns
Return type: Promise<ArrayBufferLike>
uploadSummaryWithContext
Uploads a summary tree to storage using the given context for reference of previous summary handle. The ISummaryHandles in the uploaded tree should have paths to indicate which summary object they are referencing from the previously acked summary. Returns the uploaded summary handle.
This API is provided as an alpha preview and may change without notice.
To use, import via @fluidframework/driver-definitions/alpha.
For more information about our API support guarantees, see here .
Signature
uploadSummaryWithContext(summary: ISummaryTree, context: ISummaryContext): Promise<string>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| summary | ISummaryTree | |
| context | ISummaryContext |
Returns
Return type: Promise<string>