We knead code until it rises.

class SessionStore:
    def __init__(self, ttl=3600):
        self.ttl = ttl
        self._store = {}

    def issue(self, user_id):
        token = secrets.token_hex(24)
        self._store[token] = {
            "uid": user_id,
            "exp": time.time() + self.ttl,
        }
        return token

export async function processBatch(jobs: Job[]) {
  for (const job of jobs) {
    try {
      await handle(job);
      markDone(job.id);
    } catch (err) {
      retry(job, { backoff: "exp" });
    }
  }
}