dbcache

src/services/app.service.ts

@@ -0,0 +1,33 @@
+import { Injectable, OnModuleInit } from '@nestjs/common';
+import { Cron, CronExpression } from '@nestjs/schedule';
+import { DataSource } from 'typeorm';
+
+import { ClientStatisticsService } from '../ORM/client-statistics/client-statistics.service';
+import { ClientService } from '../ORM/client/client.service';
+
+@Injectable()
+export class AppService implements OnModuleInit {
+
+    constructor(
+        private readonly clientStatisticsService: ClientStatisticsService,
+        private readonly clientService: ClientService,
+        private readonly dataSource: DataSource
+    ) {
+
+    }
+
+    async onModuleInit() {
+        //100 MB DB cache
+        await this.dataSource.query(`PRAGMA cache_size = -100000`);
+    }
+
+    @Cron(CronExpression.EVERY_HOUR)
+    private async deleteOldStatistics() {
+        if (process.env.NODE_APP_INSTANCE == null || process.env.NODE_APP_INSTANCE == '0') {
+            const deletedStatistics = await this.clientStatisticsService.deleteOldStatistics();
+            console.log(`Deleted ${deletedStatistics.affected} old statistics`);
+            const deletedClients = await this.clientService.deleteOldClients();
+            console.log(`Deleted ${deletedClients.affected} old clients`);
+        }
+    }
+}