AnnotationSupport interface

Since Grafana 7.2

This offers a generic approach to annotation processing

Signature

export interface AnnotationSupport<TQuery extends DataQuery = DataQuery, TAnno = AnnotationQuery<TQuery>>

Import

import { AnnotationSupport } from '@grafana/data';

Properties

Methods

QueryEditor property

Specify a custom QueryEditor for the annotation page. If not specified, the standard one will be used

Signature

QueryEditor?: ComponentType<AnnotationQueryEditorProps<TQuery>>;

prepareAnnotation method

This hook lets you manipulate any existing stored values before running them though the processor. This is particularly helpful when dealing with migrating old formats. ie query as a string vs object.

Signature

prepareAnnotation?(json: any): TAnno;

Parameters

Returns:

TAnno

prepareQuery method

Convert the stored JSON model to a standard datasource query object. This query will be executed in the datasource and the results converted into events. Returning an undefined result will quietly skip query execution

Signature

prepareQuery?(anno: TAnno): TQuery | undefined;

Parameters

Returns:

TQuery | undefined

processEvents method

When the standard frame > event processing is insufficient, this allows explicit control of the mappings

Signature

processEvents?(anno: TAnno, data: DataFrame[]): Observable<AnnotationEvent[] | undefined>;

Parameters

Returns:

Observable<AnnotationEvent[] | undefined>