Changeset 11815 for main/waeup.kofa/trunk/src/waeup/kofa/utils/utils.py

Timestamp:

24 Sep 2014, 15:06:49 (10 years ago)

Author:

uli

Message:

Add helper to check swap space.

File:

• main/waeup.kofa/trunk/src/waeup/kofa/utils/utils.py (modified) (2 diffs)

main/waeup.kofa/trunk/src/waeup/kofa/utils/utils.py

@@ -19 +19 @@
 """
 import grok
+import psutil
 import string
 import pytz
@@ -305 +306 @@
         """
         return payment.p_item
+
+    def expensive_actions_allowed(self, type=None, request=None):
+        """Tell, whether expensive actions are currently allowed.
+
+        Check system load/health (or other external circumstances) and
+        locally set values to see, whether expensive actions should be
+        allowed (`True`) or better avoided (`False`).
+
+        Use this to allow or forbid exports, report generations, or
+        similar actions.
+        """
+        max_values = self.SYSTEM_MAX_LOAD
+        if max_values['swap-mem'] is not None:
+            swap_mem = psutil.swap_memory()
+            max_val = max_values['swap-mem']
+            if isinstance(max_val, float):
+                if max_val < 0.0:
+                    max_val += 100.0
+                if swap_mem.percent > max_val:
+                    return False
+            else:
+                if max_val < 0:
+                    max_val += swap_mem.total
+                if swap_mem.used > max_val:
+                    return False
+        return True