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import { getTarget } from './metrics_controler';
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import { getLabeledSegments, insertSegments, removeSegments } from './segments_controller'
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import * as AnalyticUnit from '../models/analytic_unit'
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import { AnalyticsConnection } from '../services/analytics_service'
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const taskMap = {};
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let nextTaskId = 0;
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const analyticsConnection = new AnalyticsConnection(onResponse);
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function onResponse(response: any) {
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let taskId = response.__task_id;
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let status = response.status;
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if(status === 'success' || status === 'failed') {
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if(taskId in taskMap) {
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let resolver = taskMap[taskId];
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resolver(response);
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delete taskMap[taskId];
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}
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}
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}
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async function runTask(task): Promise<any> {
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let anomaly: AnalyticUnit.AnalyticUnit = AnalyticUnit.findById(task.analyticUnitId);
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task.metric = {
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datasource: anomaly.metric.datasource,
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targets: anomaly.metric.targets.map(getTarget)
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};
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task.__task_id = nextTaskId++;
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await analyticsConnection.sendTask(task);
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return new Promise<void>(resolve => {
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taskMap[task.__task_id] = resolve;
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})
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}
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export async function runLearning(id: AnalyticUnit.AnalyticUnitId) {
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let segments = getLabeledSegments(id);
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AnalyticUnit.setStatus(id, 'learning');
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let unit = AnalyticUnit.findById(id);
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let pattern = unit.type;
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let task = {
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analyticUnitId: id,
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type: 'learn',
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pattern,
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segments: segments
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};
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let result = await runTask(task);
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if (result.status === 'success') {
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AnalyticUnit.setStatus(id, 'ready');
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insertSegments(id, result.segments, false);
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AnalyticUnit.setPredictionTime(id, result.lastPredictionTime);
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} else {
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AnalyticUnit.setStatus(id, 'failed', result.error);
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}
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}
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export async function runPredict(id: AnalyticUnit.AnalyticUnitId) {
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let unit = AnalyticUnit.findById(id);
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let pattern = unit.type;
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let task = {
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type: 'predict',
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predictor_id: id,
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pattern,
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lastPredictionTime: unit.lastPredictionTime
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};
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let result = await runTask(task);
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if(result.status === 'failed') {
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return [];
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}
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// Merging segments
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let segments = getLabeledSegments(id);
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if(segments.length > 0 && result.segments.length > 0) {
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let lastOldSegment = segments[segments.length - 1];
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let firstNewSegment = result.segments[0];
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if(firstNewSegment.start <= lastOldSegment.finish) {
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result.segments[0].start = lastOldSegment.start;
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removeSegments(id, [lastOldSegment.id]);
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}
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}
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insertSegments(id, result.segments, false);
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AnalyticUnit.setPredictionTime(id, result.lastPredictionTime);
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return result.segments;
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}
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