Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.
DataSourceApi class
The main data source abstraction interface, represents an instance of a data source
Although this is a class, datasource implementations do not *yet* need to extend it. As such, we can not yet add functions with default implementations.
Signature
declare abstract class DataSourceApi<TQuery extends DataQuery = DataQuery, TOptions extends DataSourceJsonData = DataSourceJsonData, TQueryImportConfiguration extends Record<string, object> = {}>
Import
import { DataSourceApi } from '@grafana/data';
Constructors
Constructor | Modifiers | Description |
---|---|---|
constructor(instanceSettings) | Constructs a new instance of the DataSourceApi class |
Properties
Property | Modifiers | Type | Description |
---|---|---|---|
annotations | AnnotationSupport<TQuery> | An annotation processor allows explicit control for how annotations are managed.It is only necessary to configure an annotation processor if the default behavior is not desirable | |
components | DataSourcePluginComponents<DataSourceApi<TQuery, TOptions>, TQuery, TOptions> | Set after constructor call, as the data source instance is the most common thing to pass around we attach the components to this instance for easy access | |
getLogRowContext | <TContextQueryOptions extends {}>(row: LogRowModel, options?: TContextQueryOptions) => Promise<DataQueryResponse> | Retrieve context for a given log row | |
id | number | Set in constructor | |
init | () => void | Initializes a datasource after instantiation | |
interval | string | min interval range | |
languageProvider | any | Used in explore | |
meta | DataSourcePluginMeta | static information about the datasource | |
name | string | Set in constructor | |
type | string | Set in constructor | |
uid | string | Set in constructor |
Methods
Method | Modifiers | Description |
---|---|---|
annotationQuery(options) | Can be optionally implemented to allow datasource to be a source of annotations for dashboard. This function will only be called if an angular is configured and the is undefined | |
getHighlighterExpression(query) | Used in explore | |
getImportQueryConfiguration() | Returns configuration for importing queries from other data sources | |
getQueryDisplayText(query) | Convert a query to a simple text string | |
getQueryHints(query, results, rest) | Get hints for query improvements | |
getTagKeys(options) | Get tag keys for adhoc filters | |
getTagValues(options) | Get tag values for adhoc filters | |
getVersion(optionalOptions) | ||
importQueries(queries, originDataSource) | Imports queries from a different datasource | |
interpolateVariablesInQueries(queries, scopedVars) | ||
metricFindQuery(query, options) | Variable query action. | |
modifyQuery(query, action) | Used in explore | |
query(request) | Query for data, and optionally stream results | |
showContextToggle(row) | ||
targetContainsTemplate(query) | Used by alerting to check if query contains template variables | |
testDatasource() | Test & verify datasource settings & connection details (returning TestingStatus)When verification fails - errors specific to the data source should be handled here and converted to a TestingStatus object. Unknown errors and HTTP errors can be re-thrown and will be handled here: public/app/features/datasources/state/actions.ts |
constructor(instanceSettings)
Constructs a new instance of the DataSourceApi
class
Signature
constructor(instanceSettings: DataSourceInstanceSettings<TOptions>);
Parameters
Parameter | Type | Description |
---|---|---|
instanceSettings | DataSourceInstanceSettings<TOptions> |
annotations property
An annotation processor allows explicit control for how annotations are managed.
It is only necessary to configure an annotation processor if the default behavior is not desirable
Signature
annotations?: AnnotationSupport<TQuery>;
components property
Set after constructor call, as the data source instance is the most common thing to pass around we attach the components to this instance for easy access
Signature
components?: DataSourcePluginComponents<DataSourceApi<TQuery, TOptions>, TQuery, TOptions>;
getLogRowContext property
Retrieve context for a given log row
Signature
getLogRowContext?: <TContextQueryOptions extends {}>(row: LogRowModel, options?: TContextQueryOptions) => Promise<DataQueryResponse>;
id property
Set in constructor
Signature
readonly id: number;
init property
Initializes a datasource after instantiation
Signature
init?: () => void;
interval property
min interval range
Signature
interval?: string;
languageProvider property
Used in explore
Signature
languageProvider?: any;
meta property
static information about the datasource
Signature
meta: DataSourcePluginMeta;
name property
Set in constructor
Signature
readonly name: string;
type property
Set in constructor
Signature
readonly type: string;
uid property
Set in constructor
Signature
readonly uid: string;
annotationQuery method
Can be optionally implemented to allow datasource to be a source of annotations for dashboard. This function will only be called if an angular is configured and the is undefined
Signature
annotationQuery?(options: AnnotationQueryRequest<TQuery>): Promise<AnnotationEvent[]>;
Parameters
Parameter | Type | Description |
---|---|---|
options | AnnotationQueryRequest<TQuery> |
Returns:
Promise<AnnotationEvent[]>
getHighlighterExpression method
Used in explore
Signature
getHighlighterExpression?(query: TQuery): string[];
Parameters
Parameter | Type | Description |
---|---|---|
query | TQuery |
Returns:
string[]
getImportQueryConfiguration method
Returns configuration for importing queries from other data sources
Signature
getImportQueryConfiguration?(): TQueryImportConfiguration;
Returns:
TQueryImportConfiguration
getQueryDisplayText method
Convert a query to a simple text string
Signature
getQueryDisplayText?(query: TQuery): string;
Parameters
Parameter | Type | Description |
---|---|---|
query | TQuery |
Returns:
string
getQueryHints method
Get hints for query improvements
Signature
getQueryHints?(query: TQuery, results: any[], ...rest: any): QueryHint[];
Parameters
Parameter | Type | Description |
---|---|---|
query | TQuery | |
results | any[] | |
rest | any |
Returns:
QueryHint[]
getTagKeys method
Get tag keys for adhoc filters
Signature
getTagKeys?(options?: any): Promise<MetricFindValue[]>;
Parameters
Parameter | Type | Description |
---|---|---|
options | any |
Returns:
Promise<MetricFindValue[]>
getTagValues method
Get tag values for adhoc filters
Signature
getTagValues?(options: any): Promise<MetricFindValue[]>;
Parameters
Parameter | Type | Description |
---|---|---|
options | any |
Returns:
Promise<MetricFindValue[]>
getVersion method
Signature
getVersion?(optionalOptions?: any): Promise<string>;
Parameters
Parameter | Type | Description |
---|---|---|
optionalOptions | any |
Returns:
Promise<string>
importQueries method
Imports queries from a different datasource
Signature
importQueries?(queries: DataQuery[], originDataSource: DataSourceApi<DataQuery>): Promise<TQuery[]>;
Parameters
Parameter | Type | Description |
---|---|---|
queries | DataQuery[] | |
originDataSource | DataSourceApi<DataQuery> |
Returns:
Promise<TQuery[]>
interpolateVariablesInQueries method
Signature
interpolateVariablesInQueries?(queries: TQuery[], scopedVars: ScopedVars | {}): TQuery[];
Parameters
Parameter | Type | Description |
---|---|---|
queries | TQuery[] | |
scopedVars | ScopedVars | {} |
Returns:
TQuery[]
metricFindQuery method
Variable query action.
Signature
metricFindQuery?(query: any, options?: any): Promise<MetricFindValue[]>;
Parameters
Parameter | Type | Description |
---|---|---|
query | any | |
options | any |
Returns:
Promise<MetricFindValue[]>
modifyQuery method
Used in explore
Signature
modifyQuery?(query: TQuery, action: QueryFixAction): TQuery;
Parameters
Parameter | Type | Description |
---|---|---|
query | TQuery | |
action | QueryFixAction |
Returns:
TQuery
query method
Query for data, and optionally stream results
Signature
abstract query(request: DataQueryRequest<TQuery>): Promise<DataQueryResponse> | Observable<DataQueryResponse>;
Parameters
Parameter | Type | Description |
---|---|---|
request | DataQueryRequest<TQuery> |
Returns:
Promise<DataQueryResponse> | Observable<DataQueryResponse>
showContextToggle method
Signature
showContextToggle?(row?: LogRowModel): boolean;
Parameters
Parameter | Type | Description |
---|---|---|
row | LogRowModel |
Returns:
boolean
targetContainsTemplate method
Used by alerting to check if query contains template variables
Signature
targetContainsTemplate?(query: TQuery): boolean;
Parameters
Parameter | Type | Description |
---|---|---|
query | TQuery |
Returns:
boolean
testDatasource method
Test & verify datasource settings & connection details (returning TestingStatus)
When verification fails - errors specific to the data source should be handled here and converted to a TestingStatus object. Unknown errors and HTTP errors can be re-thrown and will be handled here: public/app/features/datasources/state/actions.ts
Signature
abstract testDatasource(): Promise<any>;
Returns:
Promise<any>