Now, let’s say that If the remote API service is down, then you want to complete the Future manually by the last cached price of the product.
This is a description of Future API, and my translation is:
Now, assuming that the remote API service hung up, with the result that the product price as the last cache of this asynchronous computation you want.
Author's note:
Here Translation About complete Future by sentence, did not think of a better expression, thus paraphrasing a bit, if you have a good translation, please correct me, very grateful ~