learning++ and better models

server/src/controllers/analytics_controller.ts

@@ -1,11 +1,11 @@
-import { Task } from '../models/task_model';
+import { AnalyticsMessageMethod, AnalyticsMessage } from '../models/analytics_message_model'
+import { AnalyticsTask, AnalyticsTaskType } from '../models/analytics_task_model';
 import * as Segments from '../models/segment_model';
 import * as AnalyticUnit from '../models/analytic_unit_model';
-import { AnalyticsService, AnalyticsMessage } from '../services/analytics_service';
+import { AnalyticsService } from '../services/analytics_service';
 
 
 const taskMap = new Map<string, any>();
-let nextTaskId = 0;
 
 let analyticsService: AnalyticsService = undefined;
 
@@ -26,7 +26,7 @@ async function onMessage(message: AnalyticsMessage) {
   let responsePayload = null;
   let resolvedMethod = false;
 
-  if(message.method === 'TASK_RESULT') {
+  if(message.method === AnalyticsMessageMethod.TASK_RESULT) {
     onTaskResult(message.payload);
     resolvedMethod = true;
   }
@@ -50,7 +50,7 @@ export function terminate() {
   analyticsService.close();
 }
 
-async function runTask(task: Task): Promise<any> {
+async function runTask(task: AnalyticsTask): Promise<any> {
   // let anomaly: AnalyticUnit.AnalyticUnit = await AnalyticUnit.findById(task.analyticUnitId);
   // task.metric = {
   //   datasource: anomaly.metric.datasource,
@@ -66,26 +66,59 @@ async function runTask(task: Task): Promise<any> {
 }
 
 export async function runLearning(id: AnalyticUnit.AnalyticUnitId) {
-  let segments = Segments.findMany(id, { labeled: true });
+  let segments = await Segments.findMany(id, { labeled: true });
+  let segmentObjs = segments.map(s => s.toObject());
+
+  let analyticUnit = await AnalyticUnit.findById(id);
+  if(analyticUnit.status === AnalyticUnit.AnalyticUnitStatus.LEARNING) {
+    throw new Error('Can`t starn learning when it`s already started [' + id + ']');
+  }
+
   AnalyticUnit.setStatus(id, AnalyticUnit.AnalyticUnitStatus.LEARNING);
-  let unit = await AnalyticUnit.findById(id);
-  let pattern = unit.type;
-  let task = {
-    analyticUnitId: id,
-    type: 'LEARN',
-    pattern,
-    segments: segments
-  };
+  let previousLastPredictionTime = analyticUnit.lastPredictionTime;
+
+  try {
+    let pattern = analyticUnit.type;
+    let task = new AnalyticsTask(
+      id, AnalyticsTaskType.LEARN, { pattern, segments: segmentObjs }
+    );
+    let result = await runTask(task);
+    let { lastPredictionTime, segments } = await processLearningResult(result);
+
+    await Promise.all([
+      Segments.insertSegments(segments),
+      AnalyticUnit.setPredictionTime(id, lastPredictionTime)
+    ]);
+    await AnalyticUnit.setStatus(id, AnalyticUnit.AnalyticUnitStatus.READY);
+
+  } catch (err) {
+    await AnalyticUnit.setStatus(id, AnalyticUnit.AnalyticUnitStatus.FAILED, err);
+    await AnalyticUnit.setPredictionTime(id, previousLastPredictionTime);
+  }
 
-  let result = await runTask(task);
+}
 
-  if (result.status === 'SUCCESS') {
-    AnalyticUnit.setStatus(id, AnalyticUnit.AnalyticUnitStatus.READY);
-    insertSegments(id, result.segments, false);
-    AnalyticUnit.setPredictionTime(id, result.lastPredictionTime);
-  } else {
-    AnalyticUnit.setStatus(id, AnalyticUnit.AnalyticUnitStatus.FAILED, result.error);
+async function processLearningResult(taskResult: any): Promise<{
+  lastPredictionTime: number,
+  segments: Segments.Segment[]
+}> {
+  if(taskResult.status !== 'SUCCESS') {
+    return Promise.reject(taskResult.error);
   }
+  if(taskResult.segments === undefined || !Array.isArray(taskResult.segments)) {
+    throw new Error('Missing segments is result or it is corrupted: ' + taskResult);
+  }
+  if(taskResult.lastPredictionTime === undefined || isNaN(+taskResult.lastPredictionTime)) {
+    throw new Error(
+      'Missing lastPredictionTime is result or it is corrupted: ' + taskResult.lastPredictionTime
+    );
+  }
+
+  return {
+    lastPredictionTime: +taskResult.lastPredictionTime,
+    segments: taskResult.segments.map(Segments.Segment.fromObject)
+  };
+
 }
 
 export async function runPredict(id: AnalyticUnit.AnalyticUnitId) {

server/src/models/analytics_message_model.ts

@@ -0,0 +1,30 @@
+export enum AnalyticsMessageMethod {
+  TASK = 'TASK',
+  PING = 'PING',
+  TASK_RESULT = 'TASK_RESULT'
+}
+
+export class AnalyticsMessage {
+  public constructor(
+    public method: AnalyticsMessageMethod,
+    public payload?: string, 
+    public requestId?: number
+  ) {
+
+  }
+
+  public toObject() {
+    return {
+      method: this.method,
+      payload: this.payload,
+      requestId: this.requestId
+    };
+  }
+
+  static fromObject(obj: any): AnalyticsMessage {
+    if(obj.method === undefined) {
+      throw new Error('No method in obj:' + obj);
+    }
+    return new AnalyticsMessage(obj.method, obj.payload, obj.requestId);
+  }
+}

server/src/models/analytics_task_model.ts

@@ -1,14 +1,18 @@
 import { AnalyticUnitId } from "./analytic_unit_model";
 
 
-export type TaskId = string;
-export enum TaskType { LEARN = 'LEARN' };
+export type AnalyticsTaskId = string;
+export enum AnalyticsTaskType { 
+  LEARN = 'LEARN',
+  PREDICT = 'PREDICT'
+};
 
-export class Task {
+export class AnalyticsTask {
   constructor(
     public analyticUnitId: AnalyticUnitId,
-    public type: TaskType,
-    public id?: TaskId
+    public type: AnalyticsTaskType,
+    public payload?: any,
+    public id?: AnalyticsTaskId
   ) {
     if(analyticUnitId === undefined) {
       throw new Error('analyticUnitId is undefined');
@@ -21,17 +25,18 @@ export class Task {
   public toObject() {
     return {
       _id: this.id,
-      analyticUnitId: this.analyticUnitId
+      analyticUnitId: this.analyticUnitId,
+      type: this.type
     };
   }
 
-  static fromObject(obj: any): Task {
+  static fromObject(obj: any): AnalyticsTask {
     if(obj === undefined) {
       throw new Error('obj is undefined');
     }
-    return new Task(
+    return new AnalyticsTask(
       obj.analyticUnitId,
-      obj.type as TaskType,
+      obj.type as AnalyticsTaskType,
       obj._id,
     );
   }

server/src/models/segment_model.ts

@@ -12,7 +12,7 @@ export class Segment {
     public analyticUnitId: AnalyticUnitId,
     public from: number,
     public to: number,
-    public labeled: boolean,
+    public labeled: boolean = false,
     public id?: SegmentId
   ) {
     if(analyticUnitId === undefined) {
@@ -30,9 +30,6 @@ export class Segment {
     if(isNaN(to)) {
       throw new Error('to is NaN');
     }
-    if(labeled === undefined) {
-      throw new Error('labeled is undefined');
-    }
   }
 
   public toObject() {

server/src/services/analytics_service.ts

@@ -1,3 +1,4 @@
+import { AnalyticsMessageMethod, AnalyticsMessage } from '../models/analytics_message_model'
 import * as config from '../config';
 
 const zmq = require('zeromq');
@@ -7,20 +8,6 @@ import * as fs from 'fs';
 import * as path from 'path';
 
 
-export class AnalyticsMessage {
-  public constructor(public method: string, public payload?: string, public requestId?: number) {
-
-  }
-
-  static fromJSON(obj: any): AnalyticsMessage {
-    if(obj.method === undefined) {
-      throw new Error('No method in obj:' + obj);
-    }
-    return new AnalyticsMessage(obj.method, obj.payload, obj.requestId);
-  }
-}
-
-
 export class AnalyticsService {
 
   private _requester: any;
@@ -40,7 +27,7 @@ export class AnalyticsService {
       return Promise.reject("Analytics is not ready");
     }
     let message = {
-      method: 'TASK',
+      method: AnalyticsMessageMethod.TASK,
       payload: taskObj
     }
     return this.sendMessage(message);
@@ -48,7 +35,7 @@ export class AnalyticsService {
 
   public async sendMessage(message: AnalyticsMessage): Promise<void> {
     let strMessage = JSON.stringify(message);
-    if(message.method === 'PING') {
+    if(message.method === AnalyticsMessageMethod.PING) {
       strMessage = 'PING';
     }
     return new Promise<void>((resolve, reject) => {
@@ -200,7 +187,7 @@ export class AnalyticsService {
       console.error(text);
       throw new Error('Unexpected response');
     }
-    this._onMessage(AnalyticsMessage.fromJSON(response));
+    this._onMessage(AnalyticsMessage.fromObject(response));
   }
 
   private async _runAlalyticsPinger() {
@@ -214,7 +201,7 @@ export class AnalyticsService {
       }
       this._pingResponded = false;
       // TODO: set life limit for this ping
-      this.sendMessage({ method: 'PING' });
+      this.sendMessage({ method: AnalyticsMessageMethod.PING });
     }, config.ANLYTICS_PING_INTERVAL);
   }