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|
import * as restate from "@restatedev/restate-sdk";
import type {
Queue,
QueueOptions,
RunnerFuncs,
RunnerOptions,
} from "@karakeep/shared/queueing";
import { QueueRetryAfterError } from "@karakeep/shared/queueing";
import { tryCatch } from "@karakeep/shared/tryCatch";
import { RestateSemaphore } from "./semaphore";
export function buildRestateService<T, R>(
queue: Queue<T>,
funcs: RunnerFuncs<T, R>,
opts: RunnerOptions<T>,
queueOpts: QueueOptions,
) {
const NUM_RETRIES = queueOpts.defaultJobArgs.numRetries;
return restate.service({
name: queue.name(),
options: {
inactivityTimeout: {
seconds: opts.timeoutSecs,
},
retryPolicy: {
maxAttempts: NUM_RETRIES,
initialInterval: {
seconds: 5,
},
maxInterval: {
minutes: 1,
},
},
journalRetention: {
days: 3,
},
},
handlers: {
run: async (
ctx: restate.Context,
data: {
payload: T;
queuedIdempotencyKey?: string;
priority: number;
groupId?: string;
},
) => {
const id = ctx.rand.uuidv4();
let payload = data.payload;
if (opts.validator) {
const res = opts.validator.safeParse(data.payload);
if (!res.success) {
throw new restate.TerminalError(res.error.message, {
errorCode: 400,
});
}
payload = res.data;
}
const priority = data.priority ?? 0;
const semaphore = new RestateSemaphore(
ctx,
`queue:${queue.name()}`,
opts.concurrency,
);
let lastError: Error | undefined;
let runNumber = 0;
while (runNumber <= NUM_RETRIES) {
const acquired = await semaphore.acquire(
priority,
data.groupId,
data.queuedIdempotencyKey,
);
if (!acquired) {
return;
}
const res = await runWorkerLogic(ctx, funcs, {
id,
data: payload,
priority,
runNumber,
numRetriesLeft: NUM_RETRIES - runNumber,
abortSignal: AbortSignal.timeout(opts.timeoutSecs * 1000),
});
await semaphore.release();
if (res.type === "rate_limit") {
// Handle rate limit retries without counting against retry attempts
await ctx.sleep(res.delayMs, "rate limit retry");
// Don't increment runNumber - retry without counting against attempts
continue;
}
if (res.type === "error") {
if (res.error instanceof restate.CancelledError) {
throw res.error;
}
lastError = res.error;
// TODO: add backoff
await ctx.sleep(1000, "error retry");
runNumber++;
} else {
// Success
break;
}
}
if (lastError) {
throw new restate.TerminalError(lastError.message, {
errorCode: 500,
cause: "cause" in lastError ? lastError.cause : undefined,
});
}
},
},
});
}
type RunResult<R> =
| { type: "success"; value: R }
| { type: "rate_limit"; delayMs: number }
| { type: "error"; error: Error };
async function runWorkerLogic<T, R>(
ctx: restate.Context,
{ run, onError, onComplete }: RunnerFuncs<T, R>,
data: {
id: string;
data: T;
priority: number;
runNumber: number;
numRetriesLeft: number;
abortSignal: AbortSignal;
},
): Promise<RunResult<R>> {
const res = await tryCatch(
ctx.run(
`main logic`,
async () => {
const res = await tryCatch(run(data));
if (res.error) {
if (res.error instanceof QueueRetryAfterError) {
return { type: "rate_limit" as const, delayMs: res.error.delayMs };
}
throw res.error; // Rethrow
}
return { type: "success" as const, value: res.data };
},
{
maxRetryAttempts: 1,
},
),
);
if (res.error) {
await tryCatch(
ctx.run(
`onError`,
async () =>
onError?.({
...data,
error: res.error,
}),
{
maxRetryAttempts: 1,
},
),
);
return { type: "error", error: res.error };
}
const result = res.data;
if (result.type === "rate_limit") {
// Don't call onError or onComplete for rate limit retries
return result;
}
// Success case - call onComplete
await tryCatch(
ctx.run("onComplete", async () => await onComplete?.(data, result.value), {
maxRetryAttempts: 1,
}),
);
return result;
}
|
