Chore: Move StreamingDataFrame to @grafana/data (#72014)
This commit is contained in:
Andres Martinez Gotor
File diff suppressed because it is too large
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import { AlignedData } from 'uplot';
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import { DataFrame, Field, FieldDTO, FieldType, Labels, parseLabels, QueryResultMeta } from '..';
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import { join } from '../transformations/transformers/joinDataFrames';
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import { renderLegendFormat } from '../utils/legend';
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import {
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DataFrameJSON,
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decodeFieldValueEntities,
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FieldSchema,
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guessFieldTypeFromValue,
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toFilteredDataFrameDTO,
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} from '.';
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/**
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* Indicate if the frame is appened or replace
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*
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* @alpha
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*/
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export enum StreamingFrameAction {
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Append = 'append',
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Replace = 'replace',
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}
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/**
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* @alpha
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* */
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export interface StreamingFrameOptions {
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maxLength: number; // 1000
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maxDelta: number; // how long to keep things
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action: StreamingFrameAction; // default will append
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/** optionally format field names based on labels */
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displayNameFormat?: string;
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}
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/**
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* Stream packet info is attached to StreamingDataFrames and indicate how many
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* rows were added to the end of the frame. The number of discarded rows can be
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* calculated from previous state
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*/
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export interface StreamPacketInfo {
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number: number;
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action: StreamingFrameAction;
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length: number;
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schemaChanged: boolean;
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}
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const PROM_STYLE_METRIC_LABEL = '__name__';
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enum PushMode {
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wide,
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labels,
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// long
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}
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export type SerializedStreamingDataFrame = {
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name?: string;
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fields: FieldDTO[];
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refId?: string;
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meta: QueryResultMeta;
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schemaFields: FieldSchema[];
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timeFieldIndex: number;
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pushMode: PushMode;
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length: number;
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packetInfo: StreamPacketInfo;
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options: StreamingFrameOptions;
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labels: Set<string>;
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};
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/**
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* Unlike a circular buffer, this will append and periodically slice the front
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*/
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export class StreamingDataFrame implements DataFrame {
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name?: string;
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refId?: string;
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meta: QueryResultMeta = {};
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fields: Field[] = [];
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length = 0;
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private schemaFields: FieldSchema[] = [];
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private timeFieldIndex = -1;
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private pushMode = PushMode.wide;
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// current labels
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private labels: Set<string> = new Set();
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readonly packetInfo: StreamPacketInfo = {
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schemaChanged: true,
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number: 0,
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action: StreamingFrameAction.Replace,
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length: 0,
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};
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private constructor(public options: StreamingFrameOptions) {
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// Get Length to show up if you use spread
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Object.defineProperty(this, 'length', {
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enumerable: true,
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});
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// Get fields to show up if you use spread
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Object.defineProperty(this, 'fields', {
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enumerable: true,
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});
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}
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serialize = (
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fieldPredicate?: (f: Field) => boolean,
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optionsOverride?: Partial<StreamingFrameOptions>,
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trimValues?: {
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maxLength?: number;
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}
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): SerializedStreamingDataFrame => {
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const options = optionsOverride ? Object.assign({}, { ...this.options, ...optionsOverride }) : this.options;
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const dataFrameDTO = toFilteredDataFrameDTO(this, fieldPredicate);
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const numberOfItemsToRemove = getNumberOfItemsToRemove(
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dataFrameDTO.fields.map((f) => f.values) as unknown[][],
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typeof trimValues?.maxLength === 'number' ? Math.min(trimValues.maxLength, options.maxLength) : options.maxLength,
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this.timeFieldIndex,
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options.maxDelta
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);
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dataFrameDTO.fields = dataFrameDTO.fields.map((f) => ({
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...f,
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values: (f.values as unknown[]).slice(numberOfItemsToRemove),
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}));
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const length = dataFrameDTO.fields[0]?.values?.length ?? 0;
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return {
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...dataFrameDTO,
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// TODO: Labels and schema are not filtered by field
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labels: this.labels,
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schemaFields: this.schemaFields,
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name: this.name,
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refId: this.refId,
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meta: this.meta,
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length,
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timeFieldIndex: this.timeFieldIndex,
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pushMode: this.pushMode,
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packetInfo: this.packetInfo,
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options,
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};
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};
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private initFromSerialized = (serialized: Omit<SerializedStreamingDataFrame, 'options'>) => {
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this.name = serialized.name;
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this.refId = serialized.refId;
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this.meta = serialized.meta;
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this.length = serialized.length;
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this.labels = serialized.labels;
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this.schemaFields = serialized.schemaFields;
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this.timeFieldIndex = serialized.timeFieldIndex;
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this.pushMode = serialized.pushMode;
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this.packetInfo.length = serialized.packetInfo.length;
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this.packetInfo.number = serialized.packetInfo.number;
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this.packetInfo.action = StreamingFrameAction.Replace;
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this.packetInfo.schemaChanged = true;
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this.fields = serialized.fields.map((f) => ({
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...f,
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type: f.type ?? FieldType.other,
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config: f.config ?? {},
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values: f.values ?? [],
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}));
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assureValuesAreWithinLengthLimit(
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this.fields.map((f) => f.values),
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this.options.maxLength,
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this.timeFieldIndex,
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this.options.maxDelta
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);
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};
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static deserialize = (serialized: SerializedStreamingDataFrame) => {
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const frame = new StreamingDataFrame(serialized.options);
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frame.initFromSerialized(serialized);
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return frame;
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};
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static empty = (opts?: Partial<StreamingFrameOptions>): StreamingDataFrame =>
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new StreamingDataFrame(getStreamingFrameOptions(opts));
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static fromDataFrameJSON = (frame: DataFrameJSON, opts?: Partial<StreamingFrameOptions>): StreamingDataFrame => {
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const streamingDataFrame = new StreamingDataFrame(getStreamingFrameOptions(opts));
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streamingDataFrame.push(frame);
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return streamingDataFrame;
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};
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private get alwaysReplace() {
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return this.options.action === StreamingFrameAction.Replace;
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}
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needsResizing = ({ maxLength, maxDelta }: StreamingFrameOptions) => {
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const needsMoreLength = maxLength && this.options.maxLength < maxLength;
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const needsBiggerDelta = maxDelta && this.options.maxDelta < maxDelta;
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const needsToOverrideDefaultInfinityDelta = maxDelta && this.options.maxDelta === Infinity;
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return Boolean(needsMoreLength || needsBiggerDelta || needsToOverrideDefaultInfinityDelta);
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};
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resize = ({ maxLength, maxDelta }: Partial<StreamingFrameOptions>) => {
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if (maxDelta) {
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if (this.options.maxDelta === Infinity) {
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this.options.maxDelta = maxDelta;
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} else {
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this.options.maxDelta = Math.max(maxDelta, this.options.maxDelta);
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}
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}
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this.options.maxLength = Math.max(this.options.maxLength, maxLength ?? 0);
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};
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/**
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* apply the new message to the existing data. This will replace the existing schema
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* if a new schema is included in the message, or append data matching the current schema
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*/
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push(msg: DataFrameJSON): StreamPacketInfo {
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const { schema, data } = msg;
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this.packetInfo.number++;
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this.packetInfo.length = 0;
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this.packetInfo.schemaChanged = false;
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if (schema) {
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this.pushMode = PushMode.wide;
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this.timeFieldIndex = schema.fields.findIndex((f) => f.type === FieldType.time);
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const firstField = schema.fields[0];
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if (
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this.timeFieldIndex === 1 &&
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firstField.type === FieldType.string &&
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(firstField.name === 'labels' || firstField.name === 'Labels')
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) {
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this.pushMode = PushMode.labels;
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this.timeFieldIndex = 0; // after labels are removed!
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}
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const niceSchemaFields = this.pushMode === PushMode.labels ? schema.fields.slice(1) : schema.fields;
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this.refId = schema.refId;
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if (schema.meta) {
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this.meta = { ...schema.meta };
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}
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const { displayNameFormat } = this.options;
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if (hasSameStructure(this.schemaFields, niceSchemaFields)) {
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const len = niceSchemaFields.length;
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this.fields.forEach((f, idx) => {
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const sf = niceSchemaFields[idx % len];
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f.config = sf.config ?? {};
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f.labels = sf.labels;
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});
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if (displayNameFormat) {
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this.fields.forEach((f) => {
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const labels = { [PROM_STYLE_METRIC_LABEL]: f.name, ...f.labels };
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f.config.displayNameFromDS = renderLegendFormat(displayNameFormat, labels);
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});
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}
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} else {
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this.packetInfo.schemaChanged = true;
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const isWide = this.pushMode === PushMode.wide;
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this.fields = niceSchemaFields.map((f) => {
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const config = f.config ?? {};
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if (displayNameFormat) {
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const labels = { [PROM_STYLE_METRIC_LABEL]: f.name, ...f.labels };
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config.displayNameFromDS = renderLegendFormat(displayNameFormat, labels);
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}
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return {
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config,
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name: f.name,
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labels: f.labels,
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type: f.type ?? FieldType.other,
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// transfer old values by type & name, unless we relied on labels to match fields
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values: isWide
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? this.fields.find((of) => of.name === f.name && f.type === of.type)?.values ??
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Array(this.length).fill(undefined)
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: [],
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};
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});
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}
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this.schemaFields = niceSchemaFields;
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}
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if (data && data.values.length && data.values[0].length) {
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let { values, entities } = data;
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if (entities) {
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entities.forEach((ents, i) => {
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if (ents) {
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decodeFieldValueEntities(ents, values[i]);
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// TODO: append replacements to field
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}
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});
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}
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if (this.pushMode === PushMode.labels) {
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// augment and transform data to match current schema for standard circPush() path
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const labeledTables = transpose(values);
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// make sure fields are initalized for each label
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for (const label of labeledTables.keys()) {
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if (!this.labels.has(label)) {
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this.packetInfo.schemaChanged = true;
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this.addLabel(label);
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}
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}
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// TODO: cache higher up
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let dummyTable = Array(this.schemaFields.length).fill([]);
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let tables: AlignedData[] = [];
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this.labels.forEach((label) => {
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tables.push(labeledTables.get(label) ?? dummyTable);
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});
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values = join(tables);
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}
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if (values.length !== this.fields.length) {
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if (this.fields.length) {
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throw new Error(
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`push message mismatch. Expected: ${this.fields.length}, received: ${values.length} (labels=${
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this.pushMode === PushMode.labels
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})`
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);
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}
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this.fields = values.map((vals, idx) => {
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let name = `Field ${idx}`;
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let type = guessFieldTypeFromValue(vals[0]);
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const isTime = idx === 0 && type === FieldType.number && (vals as number[])[0] > 1600016688632;
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if (isTime) {
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type = FieldType.time;
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name = 'Time';
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}
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return {
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name,
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type,
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config: {},
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values: [],
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};
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});
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}
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let appended = values;
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this.packetInfo.length = values[0].length;
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if (this.alwaysReplace || !this.length) {
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this.packetInfo.action = StreamingFrameAction.Replace;
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} else {
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this.packetInfo.action = StreamingFrameAction.Append;
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// mutates appended
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appended = this.fields.map((f) => f.values);
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circPush(appended, values, this.options.maxLength, this.timeFieldIndex, this.options.maxDelta);
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}
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appended.forEach((v, i) => {
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const field = this.fields[i];
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const { state } = field;
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field.values = v;
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if (state) {
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state.calcs = undefined;
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}
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});
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// Update the frame length
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this.length = appended[0].length;
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}
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return {
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...this.packetInfo,
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};
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}
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pushNewValues = (values: unknown[][]) => {
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if (!values?.length) {
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return;
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}
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this.packetInfo.action = this.options.action;
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this.packetInfo.number++;
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this.packetInfo.length = values[0].length;
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this.packetInfo.schemaChanged = false;
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if (this.options.action === StreamingFrameAction.Append) {
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circPush(
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this.fields.map((f) => f.values),
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values,
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this.options.maxLength,
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this.timeFieldIndex,
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this.options.maxDelta
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);
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} else {
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values.forEach((v, i) => {
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if (this.fields[i]) {
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this.fields[i].values = v;
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}
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});
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assureValuesAreWithinLengthLimit(
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this.fields.map((f) => f.values),
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this.options.maxLength,
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this.timeFieldIndex,
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this.options.maxDelta
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);
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}
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const newLength = this.fields?.[0]?.values.length;
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if (newLength !== undefined) {
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this.length = newLength;
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}
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};
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resetStateCalculations = () => {
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this.fields.forEach((f) => {
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f.state = {
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...(f.state ?? {}),
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calcs: undefined,
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range: undefined,
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};
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});
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};
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getMatchingFieldIndexes = (fieldPredicate: (f: Field) => boolean): number[] =>
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this.fields
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.map((f, index) => (fieldPredicate(f) ? index : undefined))
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.filter((val) => val !== undefined) as number[];
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getValuesFromLastPacket = (): unknown[][] =>
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this.fields.map((f) => {
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const values = f.values;
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return values.slice(Math.max(values.length - this.packetInfo.length));
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});
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hasAtLeastOnePacket = () => Boolean(this.packetInfo.length);
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// adds a set of fields for a new label
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private addLabel(label: string) {
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const { displayNameFormat } = this.options;
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const labelCount = this.labels.size;
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// parse labels
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const parsedLabels = parseLabelsFromField(label);
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if (labelCount === 0) {
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// mutate existing fields and add labels
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this.fields.forEach((f, i) => {
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if (i > 0) {
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f.labels = parsedLabels;
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if (displayNameFormat) {
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const labels = { [PROM_STYLE_METRIC_LABEL]: f.name, ...parsedLabels };
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f.config.displayNameFromDS = renderLegendFormat(displayNameFormat, labels);
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}
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}
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});
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} else {
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for (let i = 1; i < this.schemaFields.length; i++) {
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let proto = this.schemaFields[i] as Field;
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const config = proto.config ?? {};
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if (displayNameFormat) {
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const labels = { [PROM_STYLE_METRIC_LABEL]: proto.name, ...parsedLabels };
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config.displayNameFromDS = renderLegendFormat(displayNameFormat, labels);
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}
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this.fields.push({
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...proto,
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config,
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labels: parsedLabels,
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values: Array(this.length).fill(undefined),
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});
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||||
}
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}
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this.labels.add(label);
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}
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||||
getOptions = (): Readonly<StreamingFrameOptions> => this.options;
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}
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||||
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||||
export function getStreamingFrameOptions(opts?: Partial<StreamingFrameOptions>): StreamingFrameOptions {
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||||
return {
|
||||
maxLength: opts?.maxLength ?? 1000,
|
||||
maxDelta: opts?.maxDelta ?? Infinity,
|
||||
action: opts?.action ?? StreamingFrameAction.Append,
|
||||
displayNameFormat: opts?.displayNameFormat,
|
||||
};
|
||||
}
|
||||
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||||
// converts vertical insertion records with table keys in [0] and column values in [1...N]
|
||||
// to join()-able tables with column arrays
|
||||
export function transpose(vrecs: any[][]) {
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||||
let tableKeys = new Set(vrecs[0]);
|
||||
let tables = new Map();
|
||||
|
||||
tableKeys.forEach((key) => {
|
||||
let cols = Array(vrecs.length - 1)
|
||||
.fill(null)
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||||
.map(() => []);
|
||||
|
||||
tables.set(key, cols);
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||||
});
|
||||
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||||
for (let r = 0; r < vrecs[0].length; r++) {
|
||||
let table = tables.get(vrecs[0][r]);
|
||||
for (let c = 1; c < vrecs.length; c++) {
|
||||
table[c - 1].push(vrecs[c][r]);
|
||||
}
|
||||
}
|
||||
|
||||
return tables;
|
||||
}
|
||||
|
||||
// binary search for index of closest value
|
||||
export function closestIdx(num: number, arr: number[], lo?: number, hi?: number) {
|
||||
let mid;
|
||||
lo = lo || 0;
|
||||
hi = hi || arr.length - 1;
|
||||
let bitwise = hi <= 2147483647;
|
||||
|
||||
while (hi - lo > 1) {
|
||||
mid = bitwise ? (lo + hi) >> 1 : Math.floor((lo + hi) / 2);
|
||||
|
||||
if (arr[mid] < num) {
|
||||
lo = mid;
|
||||
} else {
|
||||
hi = mid;
|
||||
}
|
||||
}
|
||||
|
||||
if (num - arr[lo] <= arr[hi] - num) {
|
||||
return lo;
|
||||
}
|
||||
|
||||
return hi;
|
||||
}
|
||||
|
||||
export function parseLabelsFromField(str: string): Labels {
|
||||
if (!str.length) {
|
||||
return {};
|
||||
}
|
||||
if (str.charAt(0) === '{') {
|
||||
return parseLabels(str);
|
||||
}
|
||||
const parsedLabels: Labels = {};
|
||||
str.split(',').forEach((kv) => {
|
||||
const [key, val] = kv.trim().split('=');
|
||||
parsedLabels[key] = val;
|
||||
});
|
||||
return parsedLabels;
|
||||
}
|
||||
|
||||
/**
|
||||
* @internal // not exported in yet
|
||||
*/
|
||||
export function getLastStreamingDataFramePacket(frame: DataFrame) {
|
||||
const pi = (frame as StreamingDataFrame).packetInfo;
|
||||
return pi?.action ? pi : undefined;
|
||||
}
|
||||
|
||||
// mutable circular push
|
||||
function circPush(data: unknown[][], newData: unknown[][], maxLength = Infinity, deltaIdx = 0, maxDelta = Infinity) {
|
||||
for (let i = 0; i < data.length; i++) {
|
||||
for (let k = 0; k < newData[i].length; k++) {
|
||||
data[i].push(newData[i][k]);
|
||||
}
|
||||
}
|
||||
|
||||
return assureValuesAreWithinLengthLimit(data, maxLength, deltaIdx, maxDelta);
|
||||
}
|
||||
|
||||
function assureValuesAreWithinLengthLimit(data: unknown[][], maxLength = Infinity, deltaIdx = 0, maxDelta = Infinity) {
|
||||
const count = getNumberOfItemsToRemove(data, maxLength, deltaIdx, maxDelta);
|
||||
|
||||
if (count) {
|
||||
for (let i = 0; i < data.length; i++) {
|
||||
data[i].splice(0, count);
|
||||
}
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
function getNumberOfItemsToRemove(data: unknown[][], maxLength = Infinity, deltaIdx = 0, maxDelta = Infinity) {
|
||||
if (!data[0]?.length) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
const nlen = data[0].length;
|
||||
|
||||
let sliceIdx = 0;
|
||||
|
||||
if (nlen > maxLength) {
|
||||
sliceIdx = nlen - maxLength;
|
||||
}
|
||||
|
||||
if (maxDelta !== Infinity && deltaIdx >= 0) {
|
||||
const deltaLookup = data[deltaIdx] as number[];
|
||||
|
||||
const low = deltaLookup[sliceIdx];
|
||||
const high = deltaLookup[nlen - 1];
|
||||
|
||||
if (high - low > maxDelta) {
|
||||
sliceIdx = closestIdx(high - maxDelta, deltaLookup, sliceIdx);
|
||||
}
|
||||
}
|
||||
|
||||
return sliceIdx;
|
||||
}
|
||||
|
||||
function hasSameStructure(a: FieldSchema[], b: FieldSchema[]): boolean {
|
||||
if (a?.length !== b.length) {
|
||||
return false;
|
||||
}
|
||||
for (let i = 0; i < a.length; i++) {
|
||||
const fA = a[i];
|
||||
const fB = b[i];
|
||||
if (fA.name !== fB.name || fA.type !== fB.type) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
@@ -8,3 +8,4 @@ export * from './ArrayDataFrame';
|
||||
export * from './DataFrameJSON';
|
||||
export * from './frameComparisons';
|
||||
export { anySeriesWithTimeField, isTimeSeriesFrame, isTimeSeriesFrames } from './utils';
|
||||
export { StreamingDataFrame, StreamingFrameAction, type StreamingFrameOptions } from './StreamingDataFrame';
|
||||
|
||||
Reference in New Issue
Block a user