Integrate server-side performance statistics infrastructure

git-svn-id: https://svn.mcs.anl.gov/repos/bcfg/trunk/bcfg2@5225 ce84e21b-d406-0410-9b95-82705330c041

1 files changed, 33 insertions, 0 deletions

diff --git a/src/lib/Statistics.py b/src/lib/Statistics.py
new file mode 100644
index 000000000..a7ae85c67
--- /dev/null
+++ b/src/lib/Statistics.py
@@ -0,0 +1,33 @@
+
+class Statistic(object):
+    def __init__(self, name, initial_value):
+        self.name = name
+        self.min = float(initial_value)
+        self.max = float(initial_value)
+        self.ave = float(initial_value)
+        self.count = 1
+
+    def add_value(self, value):
+        if value < self.min:
+            self.min = value
+        if value > self.max:
+            self.max = value
+        self.count += 1
+        self.ave = (((self.ave * (self.count - 1)) + value) / self.count )
+
+    def get_value(self):
+        return (self.name, (self.min, self.max, self.ave))
+
+class Statistics(object):
+    def __init__(self):
+        self.data = dict()
+
+    def add_value(self, name, value):
+        if name not in self.data:
+            self.data[name] = Statistic(name, value)
+        else:
+            self.data[name].add_value(value)
+
+    def display(self):
+        return dict([value.get_value() for value in self.data.values()])
+