From ebabaa46f4d6c02b9547a56b68ec584f9766a67f Mon Sep 17 00:00:00 2001
From: Julius Volz <julius.volz@gmail.com>
Date: Sun, 13 Jan 2013 19:56:48 +0100
Subject: [PATCH] Serialize matrices correctly.

---
 model/metric.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/model/metric.go b/model/metric.go
index fdb2802b3..fcdf5dde0 100644
--- a/model/metric.go
+++ b/model/metric.go
@@ -15,6 +15,7 @@ package model
 
 import (
 	"time"
+        "fmt"
 )
 
 // A Fingerprint is a simplified representation of an entity---e.g., a hash of
@@ -45,6 +46,14 @@ type Metric map[LabelName]LabelValue
 // remedied down the road.
 type SampleValue float32
 
+func (v SampleValue) MarshalJSON() ([]byte, error) {
+        return []byte(fmt.Sprintf("\"%f\"", v)), nil
+}
+
+func (s SamplePair) MarshalJSON() ([]byte, error) {
+        return []byte(fmt.Sprintf("{\"Value\": \"%f\", \"Timestamp\": %d}", s.Value, s.Timestamp.Unix())), nil
+}
+
 type Sample struct {
 	Metric    Metric
 	Value     SampleValue