export class TaskCanceledError extends Error {
  override name = "TaskCanceledError";
  constructor(runId: string, reason?: string | null) {
    super(`task run ${runId} canceled${reason ? `: ${reason}` : ""}`);
  }
}

/** 租约已丢:该 opKey 已有更新的 attempt,当前 attempt 的提交被拒绝 */
export class FencingError extends Error {
  override name = "FencingError";
  constructor(opKey: string) {
    super(`operation ${opKey}: attempt token superseded, commit rejected`);
  }
}

export class UnknownTaskError extends Error {
  override name = "UnknownTaskError";
  constructor(name: string, version?: number) {
    super(`task ${name}${version === undefined ? "" : `@${version}`} is not registered`);
  }
}