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merge: try to avoid `insert` races in `FederatedInstanceService` (!683) 

View MR for information: https://activitypub.software/TransFem-org/Sharkey/-/merge_requests/683

Approved-by: Hazelnoot <acomputerdog@gmail.com>
Approved-by: Marie <github@yuugi.dev>
This commit is contained in:
Marie 2024-10-13 00:17:16 +00:00
parent 75ed3843fa 06bd29f209
commit 45974a53f8
1 changed files with 20 additions and 5 deletions
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25
packages/backend/src/core/FederatedInstanceService.ts
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@ -12,6 +12,8 @@ import { IdService } from '@/core/IdService.js';
import { DI } from '@/di-symbols.js';
import { UtilityService } from '@/core/UtilityService.js';
import { bindThis } from '@/decorators.js';
import { QueryFailedError } from 'typeorm';
import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
@Injectable()
export class FederatedInstanceService implements OnApplicationShutdown {
@ -56,11 +58,24 @@ export class FederatedInstanceService implements OnApplicationShutdown {
const index = await this.instancesRepository.findOneBy({ host });
if (index == null) {
const i = await this.instancesRepository.insertOne({
id: this.idService.gen(),
host,
firstRetrievedAt: new Date(),
});
let i;
try {
i = await this.instancesRepository.insertOne({
id: this.idService.gen(),
host,
firstRetrievedAt: new Date(),
});
} catch (e: unknown) {
if (e instanceof QueryFailedError) {
if (isDuplicateKeyValueError(e)) {
i = await this.instancesRepository.findOneBy({ host });
}
}
if (i == null) {
throw e;
}
}
this.federatedInstanceCache.set(host, i);
return i;