timer.set_handler()

svn path=/rpkid/rpki/async.py; revision=2383

1 files changed, 12 insertions, 1 deletions

diff --git a/rpkid/rpki/async.py b/rpkid/rpki/async.py
index 9bd467fd..ab1942c1 100644
--- a/rpkid/rpki/async.py
+++ b/rpkid/rpki/async.py
@@ -100,9 +100,20 @@ class timer(object):
     return self in self.queue
 
   def expired(self):
-    """Handle a timer that has expired.  Subclass must define this."""
+    """Handle a timer that has expired.  This must either be overriden
+    by a subclass or set dynamically by set_handler().
+    """
     raise NotImplementedError
 
+  def set_handler(self, handler):
+    """Set timer's expiration handler.  This is an alternative to
+    subclassing the timer class, and may be easier to use when
+    integrating timers into other classes (eg, the handler can be a
+    bound method to an object in a class representing a network
+    connection).
+    """
+    self.expired = handler
+
   @classmethod
   def runq(cls):
     """Run the timer queue: for each timer whose call time has passed,