dash Cache has no `get_with`

[moka-rs]

dash Cache has no `get_with`

[tatsuya6502]

Hi. You are right; dash::Cache has no get_with (or get_or_insert_with).

A bit of history; we added the experimental dash::Cache for the following reasons:

1. A user wanted to ensure never to get an issue: #34
   • The segmentation fault was occurring in our concurrent lock-free hash table implementation moka::cht.
   • moka::cht is used by sync and future caches.
2. The same user wanted to reduce external crate dependencies. e.g. Remove crossbeam-epoch crate that is used by moka::cht.

We used dashmap::DashMap as an alternative concurrent hash table. However, implementing get_with method on it would require a non trivial amount of work, so we decided not to do it.

Now Moka v0.9.2 was just released with the fix for issue #34. So if you wanted to use dash::Cache just because to avoid the issue, you no longer have to use it. If so, please use sync::Cache or future::Cache instead.

[tatsuya6502]

I am closing this. Feel free to reopen if you find sync::Cache or future::Cache do not meet your requirements.