PoolApi

A fixed-size connection pool.

Note: the pool is managed by a simple blocking queue. If this becomes a bottleneck, we should consider using a more concurrent-friendly datastructure. Possible areas of research include HikariCP's ConcurrentBag implementation.

A growable connection pool.

This pool starts with an initial number of connections, and can grow if demand exceeds supply.

Note: the pool does not shrink back to its initial size after demand spikes! TODO: periodically reclaim memory by removing excessive items from the pool

Visitor that reads a user-facing type from only a bulk string.

For all intents and purposes, a writable is as BulkString. However, we use a wrapper type defined in an API trait, so that users can define their own conversions.