Struct ConnectionPool 

pub struct ConnectionPool<T> { /* private fields */ }

A minimal database connection pool.

Maintains a bounded set of connections and hands them out on request. When all connections are in use, callers block until one is returned (or a timeout expires).

Connections are returned automatically when the PooledConnection guard is dropped, so callers cannot accidentally leak a slot.

Implementations

impl<T> ConnectionPool<T>

pub fn new(max_size: usize) -> Self

Create a new, empty pool with the given capacity.

Connections must be added via [add] before they can be acquired.

pub fn add(&self, conn: T)

Add a connection to the pool.

Panics if the pool is already at capacity.

pub fn get( &self, timeout: Duration, ) -> Result<PooledConnection<'_, T>, PoolError>

Acquire a connection, blocking up to timeout.

Returns Err if the timeout expires before a connection becomes available.

pub fn available_count(&self) -> usize

Number of connections currently idle in the pool.

pub fn max_size(&self) -> usize

Maximum number of connections this pool can hold.