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import path from "node:path";
import {
buildDBClient,
SqliteQueue as LQ,
Runner as LQRunner,
migrateDB,
RetryAfterError,
} from "liteque";
import type { PluginProvider } from "@karakeep/shared/plugins";
import type {
DequeuedJob,
EnqueueOptions,
Queue,
QueueClient,
QueueOptions,
Runner,
RunnerFuncs,
RunnerOptions,
} from "@karakeep/shared/queueing";
import serverConfig from "@karakeep/shared/config";
import { QueueRetryAfterError } from "@karakeep/shared/queueing";
class LitequeQueueWrapper<T> implements Queue<T> {
constructor(
private readonly _name: string,
private readonly lq: LQ<T>,
public readonly opts: QueueOptions,
) {}
name(): string {
return this._name;
}
async enqueue(
payload: T,
options?: EnqueueOptions,
): Promise<string | undefined> {
const job = await this.lq.enqueue(payload, options);
// liteque returns a Job with numeric id
return job ? String(job.id) : undefined;
}
async stats() {
return this.lq.stats();
}
async cancelAllNonRunning(): Promise<number> {
return this.lq.cancelAllNonRunning();
}
// Internal accessor for runner
get _impl(): LQ<T> {
return this.lq;
}
}
class LitequeQueueClient implements QueueClient {
private db = buildDBClient(path.join(serverConfig.dataDir, "queue.db"), {
walEnabled: serverConfig.database.walMode,
});
private queues = new Map<string, LitequeQueueWrapper<unknown>>();
async prepare(): Promise<void> {
migrateDB(this.db);
}
async start(): Promise<void> {
// No-op for sqlite
}
createQueue<T>(name: string, options: QueueOptions): Queue<T> {
if (this.queues.has(name)) {
throw new Error(`Queue ${name} already exists`);
}
const lq = new LQ<T>(name, this.db, {
defaultJobArgs: { numRetries: options.defaultJobArgs.numRetries },
keepFailedJobs: options.keepFailedJobs,
});
const wrapper = new LitequeQueueWrapper<T>(name, lq, options);
this.queues.set(name, wrapper);
return wrapper;
}
createRunner<T, R = void>(
queue: Queue<T>,
funcs: RunnerFuncs<T, R>,
opts: RunnerOptions<T>,
): Runner<T> {
const name = queue.name();
let wrapper = this.queues.get(name);
if (!wrapper) {
throw new Error(`Queue ${name} not found`);
}
// Wrap the run function to translate QueueRetryAfterError to liteque's RetryAfterError
const wrappedRun = async (job: DequeuedJob<T>): Promise<R> => {
try {
return await funcs.run(job);
} catch (error) {
if (error instanceof QueueRetryAfterError) {
// Translate to liteque's native RetryAfterError
// This will cause liteque to retry after the delay without counting against attempts
throw new RetryAfterError(error.delayMs);
}
// Re-throw any other errors
throw error;
}
};
const runner = new LQRunner<T, R>(
wrapper._impl,
{
run: wrappedRun,
onComplete: funcs.onComplete,
onError: funcs.onError,
},
{
pollIntervalMs: opts.pollIntervalMs ?? 1000,
timeoutSecs: opts.timeoutSecs,
concurrency: opts.concurrency,
validator: opts.validator,
},
);
return {
run: () => runner.run(),
stop: () => runner.stop(),
runUntilEmpty: () => runner.runUntilEmpty(),
};
}
async shutdown(): Promise<void> {
// No-op for sqlite
}
}
export class LitequeQueueProvider implements PluginProvider<QueueClient> {
private client: QueueClient | null = null;
async getClient(): Promise<QueueClient | null> {
if (!this.client) {
const client = new LitequeQueueClient();
this.client = client;
}
return this.client;
}
}
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