## org.apache.http.pool
Interface ConnPool<T,E>

Type Parameters:
  `T` - the route type that represents the opposite endpoint of a pooled connection.
  `E` - the type of the pool entry containing a pooled connection.

All Known Implementing Classes:
  AbstractConnPool, AbstractNIOConnPool, BasicConnPool, BasicNIOConnPool

    public interface ConnPool<T,E>

`ConnPool` represents a shared pool connections can be leased from and released back to.

Since:
  4.2

Method Summary
`Future<E>` `lease(T route, Object state, FutureCallback<E> callback)` Attempts to lease a connection for the given route and with the given state from the pool.
`void` `release(E entry, boolean reusable)` Releases the pool entry back to the pool.

Method Detail

### lease

    Future<E> lease(T route,
                    Object state,
                    FutureCallback<E> callback)

  Attempts to lease a connection for the given route and with the given state from the pool.

  Parameters:
    `route` - route of the connection.
    `state` - arbitrary object that represents a particular state (usually a security principal or a unique token identifying the user whose credentials have been used while establishing the connection). May be `null`.
    `callback` - operation completion callback.
  Returns:
    future for a leased pool entry.

### release

    void release(E entry,
                 boolean reusable)

  Releases the pool entry back to the pool.

  Parameters:
    `entry` - pool entry leased from the pool
    `reusable` - flag indicating whether or not the released connection is in a consistent state and is safe for further use.

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