src/performance/storage/MongoDBStorage.ts

   1 // Copyright Jerome Benoit. 2021. All Rights Reserved.
   2
   3 import { MongoClient } from 'mongodb';
   4
   5 import Statistics from '../../types/Statistics';
   6 import { StorageType } from '../../types/Storage';
   7 import Constants from '../../utils/Constants';
   8 import { Storage } from './Storage';
   9
  10 export class MongoDBStorage extends Storage {
  11   private readonly client: MongoClient | null;
  12   private connected: boolean;
  13
  14   constructor(storageUri: string, logPrefix: string) {
  15     super(storageUri, logPrefix);
  16     this.client = new MongoClient(this.storageUri.toString());
  17     this.connected = false;
  18     this.dbName =
  19       this.storageUri.pathname.replace(/(?:^\/)|(?:\/$)/g, '') ??
  20       Constants.DEFAULT_PERFORMANCE_RECORDS_DB_NAME;
  21   }
  22
  23   public async storePerformanceStatistics(performanceStatistics: Statistics): Promise<void> {
  24     try {
  25       this.checkDBConnection();
  26       await this.client
  27         .db(this.dbName)
  28         .collection<Statistics>(Constants.PERFORMANCE_RECORDS_TABLE)
  29         .insertOne(performanceStatistics);
  30     } catch (error) {
  31       this.handleDBError(StorageType.MONGO_DB, error as Error, Constants.PERFORMANCE_RECORDS_TABLE);
  32     }
  33   }
  34
  35   public async open(): Promise<void> {
  36     try {
  37       if (!this.connected && this?.client) {
  38         await this.client.connect();
  39         this.connected = true;
  40       }
  41     } catch (error) {
  42       this.handleDBError(StorageType.MONGO_DB, error as Error);
  43     }
  44   }
  45
  46   public async close(): Promise<void> {
  47     try {
  48       if (this.connected && this?.client) {
  49         await this.client.close();
  50         this.connected = false;
  51       }
  52     } catch (error) {
  53       this.handleDBError(StorageType.MONGO_DB, error as Error);
  54     }
  55   }
  56
  57   private checkDBConnection() {
  58     if (!this?.client) {
  59       throw new Error(
  60         `${this.logPrefix} ${this.getDBNameFromStorageType(
  61           StorageType.MONGO_DB
  62         )} client initialization failed while trying to issue a request`
  63       );
  64     }
  65     if (!this.connected) {
  66       throw new Error(
  67         `${this.logPrefix} ${this.getDBNameFromStorageType(
  68           StorageType.MONGO_DB
  69         )} connection not opened while trying to issue a request`
  70       );
  71     }
  72   }
  73 }