From d0c43348349e71d657b3c8d86bda4d7fe3f1471e Mon Sep 17 00:00:00 2001
From: "Frederick F. Kautz IV" <fkautz@alumni.cmu.edu>
Date: Thu, 7 May 2015 12:52:39 -0700
Subject: [PATCH] Adding feature flags

---
 pkg/featureflags/featureflag.go      | 30 ++++++++++++++++++++++++++++
 pkg/featureflags/featureflag_test.go | 22 ++++++++++++++++++++
 pkg/featureflags/features.go         |  6 ++++++
 3 files changed, 58 insertions(+)
 create mode 100644 pkg/featureflags/featureflag.go
 create mode 100644 pkg/featureflags/featureflag_test.go
 create mode 100644 pkg/featureflags/features.go

diff --git a/pkg/featureflags/featureflag.go b/pkg/featureflags/featureflag.go
new file mode 100644
index 000000000..9a7bd3904
--- /dev/null
+++ b/pkg/featureflags/featureflag.go
@@ -0,0 +1,30 @@
+package featureflags
+
+import (
+	"sync"
+)
+
+var features = make(map[string]bool)
+var lock = &sync.RWMutex{}
+
+// Get feature will return true if the feature is enabled, otherwise false
+func Get(feature string) bool {
+	lock.RLock()
+	defer lock.RUnlock()
+	res := features[feature]
+	return res
+}
+
+// Enable a feature
+func Enable(feature string) {
+	lock.Lock()
+	defer lock.Unlock()
+	features[feature] = true
+}
+
+// Disable a feature
+func Disable(feature string) {
+	lock.Lock()
+	defer lock.Unlock()
+	features[feature] = false
+}
diff --git a/pkg/featureflags/featureflag_test.go b/pkg/featureflags/featureflag_test.go
new file mode 100644
index 000000000..ff5de5d3a
--- /dev/null
+++ b/pkg/featureflags/featureflag_test.go
@@ -0,0 +1,22 @@
+package featureflags
+
+import (
+	"testing"
+)
+
+func TestFeatureFlag(t *testing.T) {
+	foo := Get("foo")
+	if foo {
+		t.Fail()
+	}
+	Enable("foo")
+	foo = Get("foo")
+	if !foo {
+		t.Fail()
+	}
+	Disable("foo")
+	foo = Get("foo")
+	if foo {
+		t.Fail()
+	}
+}
diff --git a/pkg/featureflags/features.go b/pkg/featureflags/features.go
new file mode 100644
index 000000000..da85bc1e1
--- /dev/null
+++ b/pkg/featureflags/features.go
@@ -0,0 +1,6 @@
+package featureflags
+
+const (
+	// MultipartPutObject ...
+	MultipartPutObject = "minio.multipart_put_object"
+)