- Pool listeners may now be specified as a duck-type of PoolListener or a dict of callables, your choice.

1 files changed, 15 insertions, 5 deletions

diff --git a/lib/sqlalchemy/pool.py b/lib/sqlalchemy/pool.py
index 94d9127f0..71c0c82df 100644
--- a/lib/sqlalchemy/pool.py
+++ b/lib/sqlalchemy/pool.py
@@ -20,7 +20,7 @@ import weakref, time
 
 from sqlalchemy import exceptions, logging
 from sqlalchemy import queue as Queue
-from sqlalchemy.util import thread, threading, pickle
+from sqlalchemy.util import thread, threading, pickle, as_interface
 
 proxies = {}
 
@@ -106,9 +106,10 @@ class Pool(object):
       newly opened connection. Defaults to -1.
 
     listeners
-      A list of ``PoolListener``-like objects that receive events when
-      DB-API connections are created, checked out and checked in to
-      the pool.
+      A list of ``PoolListener``-like objects or dictionaries of callables
+      that receive events when DB-API connections are created, checked out and
+      checked in to the pool.
+
     """
 
     def __init__(self, creator, recycle=-1, echo=None, use_threadlocal=True,
@@ -182,7 +183,16 @@ class Pool(object):
         raise NotImplementedError()
 
     def add_listener(self, listener):
-        """Add a ``PoolListener``-like object to this pool."""
+        """Add a ``PoolListener``-like object to this pool.
+
+        ``listener`` may be an object that implements some or all of
+        PoolListener, or a dictionary of callables containing implementations
+        of some or all of the named methods in PoolListener.
+
+        """
+
+        listener = as_interface(
+            listener, methods=('connect', 'checkout', 'checkin'))
 
         self.listeners.append(listener)
         if hasattr(listener, 'connect'):