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add caching to reduce database load of get-online-users-count

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Hazelnoot 2025-06-26 14:32:27 -04:00
parent f6ef65fdbd
commit 4ceff00dac
1 changed files with 20 additions and 11 deletions
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31
packages/backend/src/server/api/endpoints/get-online-users-count.ts
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@ -10,6 +10,7 @@ import type { UsersRepository } from '@/models/_.js';
import { Endpoint } from '@/server/api/endpoint-base.js';
import { DI } from '@/di-symbols.js';
import { TimeService } from '@/global/TimeService.js';
import { CacheManagementService, type ManagedMemorySingleCache } from '@/global/CacheManagementService.js';
export const meta = {
tags: ['meta'],
@ -48,24 +49,32 @@ export const paramDef = {
@Injectable()
export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
private readonly cache: ManagedMemorySingleCache<{ count: number, countAcrossNetwork: number }>;
constructor(
@Inject(DI.usersRepository)
private usersRepository: UsersRepository,
private readonly timeService: TimeService,
cacheManagementService: CacheManagementService,
) {
super(meta, paramDef, async () => {
const countAcrossNetwork = await this.usersRepository.countBy({
lastActiveDate: MoreThan(new Date(Date.now() - USER_ONLINE_THRESHOLD)),
});
const count = await this.usersRepository.countBy({
lastActiveDate: MoreThan(new Date(this.timeService.now - USER_ONLINE_THRESHOLD)),
host: IsNull(),
});
return this.cache.fetch(async () => {
const countAcrossNetwork = await this.usersRepository.countBy({
lastActiveDate: MoreThan(new Date(this.timeService.now - USER_ONLINE_THRESHOLD)),
});
const count = await this.usersRepository.countBy({
lastActiveDate: MoreThan(new Date(this.timeService.now - USER_ONLINE_THRESHOLD)),
host: IsNull(),
});
return {
count,
countAcrossNetwork,
};
return {
count,
countAcrossNetwork,
};
});
});
this.cache = cacheManagementService.createMemorySingleCache<{ count: number, countAcrossNetwork: number }>(1000 * 60); // 1 minute
}
}