Define what timeout are configurable

[ttddyy]

According to reactor/reactor-pool#34, I read there are 3 timeout:

1. Timeout for getting actual resource from allocator. (connection from ConnectionFactory).
   => use PoolBuilder.from(allocator.timeout())
2. the pool is depleted and resources have reached to the max size, so no more new resource allocation. thus, timeout for waiting a resource to be released.
   => use pool.acquire(Duration) (the new method)
3. Both of above
   => use pool.acquire().timeout()

@simonbasle is this correct understanding?

While thinking this, I'm thinking what would be good for connection pooling.

Currently in r2dbc-pool, timeout for 2 and 3 are configureable. (maxCreateConnectionTime is for 2 and maxAcquireTime for 3)

From connection-pool perspective, I think it is sufficient for making 2 and 3 configurable.

Q1: But is it too much configurable? Should we only make 3 configureable? OR, it's less, make all 1,2,3 configureable?

Q2: Validation. Currently, a user can set timeout for 3 to 10sec and 2 to 30sec.
Should we put validation logic that timeout for 2 should be less than equal to timeout for 3?

My opinion is timeout for 2 and 3 are sufficient. Maybe good to have warning message for validation.
Wondering what others think :)

[simonbasle]

@ttddyy that is correct for the various timeouts