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.
DataSourceWithBackend class
Extend this class to implement a data source plugin that is depending on the Grafana backend API.
Signature
export declare class DataSourceWithBackend<TQuery extends DataQuery = DataQuery, TOptions extends DataSourceJsonData = DataSourceJsonData> extends DataSourceApi<TQuery, TOptions> Import
import { DataSourceWithBackend } from '@grafana/runtime';Constructors
| Constructor | Modifiers | Description |
|---|---|---|
| constructor(instanceSettings) | Constructs a new instance of the DataSourceWithBackend class |
Methods
| Method | Modifiers | Description |
|---|---|---|
| applyTemplateVariables(query, scopedVars) | Override to apply template variables. The result is usually also TQuery, but sometimes this can be used to modify the query structure before sending to the backend.NOTE: if you do modify the structure or use template variables, alerting queries may not work as expected | |
| callHealthCheck() | Run the datasource healthcheck | |
| filterQuery(query) | Override to skip executing a query | |
| getResource(path, params) | Make a GET request to the datasource resource path | |
| postResource(path, body) | Send a POST request to the datasource resource path | |
| query(request) | Ideally final – any other implementation may not work as expected | |
| testDatasource() | Checks the plugin health |
constructor(instanceSettings)
Constructs a new instance of the DataSourceWithBackend class
Signature
constructor(instanceSettings: DataSourceInstanceSettings<TOptions>);Parameters
| Parameter | Type | Description |
|---|---|---|
| instanceSettings | DataSourceInstanceSettings<TOptions> |
applyTemplateVariables method
Override to apply template variables. The result is usually also TQuery, but sometimes this can be used to modify the query structure before sending to the backend.
NOTE: if you do modify the structure or use template variables, alerting queries may not work as expected
Signature
/** @virtual */
applyTemplateVariables(query: TQuery, scopedVars: ScopedVars): Record<string, any>;Parameters
| Parameter | Type | Description |
|---|---|---|
| query | TQuery | |
| scopedVars | ScopedVars |
Returns:
Record<string, any>
callHealthCheck method
Run the datasource healthcheck
Signature
callHealthCheck(): Promise<HealthCheckResult>;Returns:
Promise<HealthCheckResult>
filterQuery method
Override to skip executing a query
Signature
/** @virtual */
filterQuery?(query: TQuery): boolean;Parameters
| Parameter | Type | Description |
|---|---|---|
| query | TQuery |
Returns:
boolean
false if the query should be skipped
getResource method
Make a GET request to the datasource resource path
Signature
getResource(path: string, params?: any): Promise<any>;Parameters
| Parameter | Type | Description |
|---|---|---|
| path | string | |
| params | any |
Returns:
Promise<any>
postResource method
Send a POST request to the datasource resource path
Signature
postResource(path: string, body?: any): Promise<any>;Parameters
| Parameter | Type | Description |
|---|---|---|
| path | string | |
| body | any |
Returns:
Promise<any>
query method
Ideally final – any other implementation may not work as expected
Signature
query(request: DataQueryRequest<TQuery>): Observable<DataQueryResponse>;Parameters
| Parameter | Type | Description |
|---|---|---|
| request | DataQueryRequest<TQuery> |
Returns:
Observable<DataQueryResponse>
testDatasource method
Checks the plugin health
Signature
testDatasource(): Promise<any>;Returns:
Promise<any>
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