1 files changed, 6 insertions, 10 deletions

diff --git a/src/mailman/chains/hold.py b/src/mailman/chains/hold.py
index f095bc182..34389f82e 100644
--- a/src/mailman/chains/hold.py
+++ b/src/mailman/chains/hold.py
@@ -17,12 +17,11 @@
 
 """The terminal 'hold' chain."""
 
-from __future__ import absolute_import, unicode_literals
+from __future__ import absolute_import, print_function, unicode_literals
 
 __metaclass__ = type
 __all__ = [
     'HoldChain',
-    'HoldNotification',
     ]
 
 
@@ -33,15 +32,16 @@ from email.mime.text import MIMEText
 from email.utils import formatdate, make_msgid
 from zope.component import getUtility
 from zope.event import notify
-from zope.interface import implements
+from zope.interface import implementer
 
 from mailman.app.moderator import hold_message
 from mailman.app.replybot import can_acknowledge
-from mailman.chains.base import ChainNotification, TerminalChainBase
+from mailman.chains.base import TerminalChainBase
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.email.message import UserNotification
 from mailman.interfaces.autorespond import IAutoResponseSet, Response
+from mailman.interfaces.chain import HoldEvent
 from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.pending import IPendable, IPendings
 from mailman.interfaces.usermanager import IUserManager
@@ -54,15 +54,11 @@ SEMISPACE = '; '
 
 
 
+@implementer(IPendable)
 class HeldMessagePendable(dict):
-    implements(IPendable)
     PEND_KEY = 'held message'
 
 
-class HoldNotification(ChainNotification):
-    """A notification event signaling that a message is being held."""
-
-
 
 def autorespond_to_sender(mlist, sender, language=None):
     """Should Mailman automatically respond to this sender?
@@ -249,4 +245,4 @@ also appear in the first line of the body of the reply.""")),
         log.info('HOLD: %s post from %s held, message-id=%s: %s',
                  mlist.fqdn_listname, msg.sender,
                  msg.get('message-id', 'n/a'), reason)
-        notify(HoldNotification(mlist, msg, msgdata, self))
+        notify(HoldEvent(mlist, msg, msgdata, self))