[hyena] Add Metric.PushSample method

[Gabriel Burt <gburt src gnome org>]

commit f3a89f9beecc991d0093876e5a0a340364b5954b
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Fri Feb 12 13:55:26 2010 -0800

    Add Metric.PushSample method

 src/Hyena/Hyena.Metrics/Metric.cs |   18 ++++++++++++++++--
 1 files changed, 16 insertions(+), 2 deletions(-)
---
diff --git a/src/Hyena/Hyena.Metrics/Metric.cs b/src/Hyena/Hyena.Metrics/Metric.cs
index 1eb3048..07997cf 100644
--- a/src/Hyena/Hyena.Metrics/Metric.cs
+++ b/src/Hyena/Hyena.Metrics/Metric.cs
@@ -62,13 +62,27 @@ namespace Hyena.Metrics
         {
         }
 
+        public void PushSample (object sampleValue)
+        {
+            try {
+                store.Add (new Sample (this, sampleValue));
+            } catch (Exception e) {
+                Log.Exception ("Error taking sample", e);
+            }
+        }
+
         public void TakeSample ()
         {
             if (sample_func == null) {
-                throw new InvalidOperationException ("sampleFunc is null.  Are you calling TakeSample on a non-event-driven metric?");
+                Log.Warning ("sampleFunc is null.  Are you calling TakeSample on a non-event-driven metric?");
+                return;
             }
 
-            store.Add (new Sample (this, sample_func ()));
+            try {
+                store.Add (new Sample (this, sample_func ()));
+            } catch (Exception e) {
+                Log.Exception ("Error taking sample", e);
+            }
         }
     }
 }