Method addNewNode

src/generic/key_value_filesystem.ts:1125–1145

* Adds a new node under a random ID. Retries 5 times before giving up in * the exceedingly unlikely chance that we try to reuse a random GUID. * @param cb Passed an error or the GUID that the data was stored under.

(tx: AsyncKeyValueRWTransaction, data: Buffer, cb: BFSCallback<string>)

   * @param cb Passed an error or the GUID that the data was stored under.
   */
  private addNewNode(tx: AsyncKeyValueRWTransaction, data: Buffer, cb: BFSCallback<string>): void {
    let retries = 0, currId: string;
    const reroll = () => {
      if (++retries === 5) {
        // Max retries hit. Return with an error.
        cb(new ApiError(ErrorCode.EIO, 'Unable to commit data to key-value store.'));
      } else {
        // Try again.
        currId = GenerateRandomID();
        tx.put(currId, data, false, (e: ApiError, committed?: boolean) => {
          if (e || !committed) {
            reroll();
          } else {
            // Successfully stored under 'currId'.
            cb(null, currId);
          }
        });
      }
    };
    reroll();
  }

  /**
   * Commits a new file (well, a FILE or a DIRECTORY) to the file system with