Changeset 6e33086 for fedd/federation/experiment_info.py

Timestamp:

Nov 28, 2011 7:34:11 PM (13 years ago)

Author:

Ted Faber <faber@…>

Branches:

compt_changes, info-ops, master

Children:

ec3aa4d

Parents:

45e880d

Message:

InfoSegment? to emulab access controllers

File:

• fedd/federation/experiment_info.py (modified) (3 diffs)

fedd/federation/experiment_info.py

@@ -2 +2 @@
 
 import copy
+from datetime import datetime, timedelta
+from numbers import Number
 
 class allocation_info:
@@ -38 +40 @@
         self.log = []
         self.alloc = { }
+        self.last_update = datetime.now()
 
     def add_allocation(self, a):
@@ -47 +50 @@
     def get_all_allocations(self):
         return self.alloc.values()
+
+    def updated(self):
+        self.last_update = datetime.now()
+
+    def older_than(self, secs=None, dt=None):
+        """
+        If the last update of this info was more than secs seconds ago, or
+        before dt (a datetime), return True.  If both secs and dt or neither is
+        given return False.  If the last update time is completelt unknown
+        (which should never happen) return True.
+        """
+        if self.last_update is None:
+            return True
+        elif dt is None and isinstance(secs, Number): 
+            return self.last_update + timedelta(seconds=secs) < datetime.now()
+        elif secs is None and isinstance(dt, datetime):
+            return self.last_update < dt
+        else:
+            return False
+
 
     def get_info(self):