Add ability to listwatch a resource in an optional namespace

pkg/client/cache/listwatch.go

@@ -29,12 +29,14 @@ type ListWatch struct {
 	Client        *client.Client
 	FieldSelector labels.Selector
 	Resource      string
+	Namespace     string
 }
 
 // ListWatch knows how to list and watch a set of apiserver resources.
 func (lw *ListWatch) List() (runtime.Object, error) {
 	return lw.Client.
 		Get().
+		Namespace(lw.Namespace).
 		Resource(lw.Resource).
 		SelectorParam("fields", lw.FieldSelector).
 		Do().
@@ -45,6 +47,7 @@ func (lw *ListWatch) Watch(resourceVersion string) (watch.Interface, error) {
 	return lw.Client.
 		Get().
 		Prefix("watch").
+		Namespace(lw.Namespace).
 		Resource(lw.Resource).
 		SelectorParam("fields", lw.FieldSelector).
 		Param("resourceVersion", resourceVersion).

pkg/client/cache/listwatch_test.go

@@ -18,8 +18,11 @@ package cache
 
 import (
 	"net/http/httptest"
+	"net/url"
+	"path"
 	"testing"
 
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/testapi"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
@@ -34,29 +37,70 @@ func parseSelectorOrDie(s string) labels.Selector {
 	return selector
 }
 
+// buildResourcePath is a convenience function for knowing if a namespace should be in a path param or not
+func buildResourcePath(prefix, namespace, resource string) string {
+	base := path.Join("/api", testapi.Version(), prefix)
+	if len(namespace) > 0 {
+		if !(testapi.Version() == "v1beta1" || testapi.Version() == "v1beta2") {
+			base = path.Join(base, "ns", namespace)
+		}
+	}
+	return path.Join(base, resource)
+}
+
+// buildQueryValues is a convenience function for knowing if a namespace should be in a query param or not
+func buildQueryValues(namespace string, query url.Values) url.Values {
+	v := url.Values{}
+	if query != nil {
+		for key, values := range query {
+			for _, value := range values {
+				v.Add(key, value)
+			}
+		}
+	}
+	if len(namespace) > 0 {
+		if testapi.Version() == "v1beta1" || testapi.Version() == "v1beta2" {
+			v.Set("namespace", namespace)
+		}
+	}
+	return v
+}
+
+func buildLocation(resourcePath string, query url.Values) string {
+	return resourcePath + "?" + query.Encode()
+}
+
 func TestListWatchesCanList(t *testing.T) {
 	table := []struct {
 		location string
 		lw       ListWatch
 	}{
 		// Minion
 		{
-			location: "/api/" + testapi.Version() + "/minions",
+			location: buildLocation(buildResourcePath("", api.NamespaceAll, "minions"), buildQueryValues(api.NamespaceAll, nil)),
 			lw: ListWatch{
 				FieldSelector: parseSelectorOrDie(""),
 				Resource:      "minions",
 			},
 		},
 		// pod with "assigned" field selector.
 		{
-			location: "/api/" + testapi.Version() + "/pods?fields=DesiredState.Host%3D",
+			location: buildLocation(buildResourcePath("", api.NamespaceAll, "pods"), buildQueryValues(api.NamespaceAll, url.Values{"fields": []string{"DesiredState.Host="}})),
+			lw: ListWatch{
+				FieldSelector: labels.Set{"DesiredState.Host": ""}.AsSelector(),
+				Resource:      "pods",
+			},
+		},
+		// pod in namespace "foo"
+		{
+			location: buildLocation(buildResourcePath("", "foo", "pods"), buildQueryValues("foo", url.Values{"fields": []string{"DesiredState.Host="}})),
 			lw: ListWatch{
 				FieldSelector: labels.Set{"DesiredState.Host": ""}.AsSelector(),
 				Resource:      "pods",
+				Namespace:     "foo",
 			},
 		},
 	}
-
 	for _, item := range table {
 		handler := util.FakeHandler{
 			StatusCode:   500,
@@ -80,15 +124,15 @@ func TestListWatchesCanWatch(t *testing.T) {
 	}{
 		// Minion
 		{
-			location: "/api/" + testapi.Version() + "/watch/minions?resourceVersion=",
+			location: buildLocation(buildResourcePath("watch", api.NamespaceAll, "minions"), buildQueryValues(api.NamespaceAll, url.Values{"resourceVersion": []string{""}})),
 			rv:       "",
 			lw: ListWatch{
 				FieldSelector: parseSelectorOrDie(""),
 				Resource:      "minions",
 			},
 		},
 		{
-			location: "/api/" + testapi.Version() + "/watch/minions?resourceVersion=42",
+			location: buildLocation(buildResourcePath("watch", api.NamespaceAll, "minions"), buildQueryValues(api.NamespaceAll, url.Values{"resourceVersion": []string{"42"}})),
 			rv:       "42",
 			lw: ListWatch{
 				FieldSelector: parseSelectorOrDie(""),
@@ -97,11 +141,21 @@ func TestListWatchesCanWatch(t *testing.T) {
 		},
 		// pod with "assigned" field selector.
 		{
-			location: "/api/" + testapi.Version() + "/watch/pods?fields=DesiredState.Host%3D&resourceVersion=0",
+			location: buildLocation(buildResourcePath("watch", api.NamespaceAll, "pods"), buildQueryValues(api.NamespaceAll, url.Values{"fields": []string{"DesiredState.Host="}, "resourceVersion": []string{"0"}})),
+			rv:       "0",
+			lw: ListWatch{
+				FieldSelector: labels.Set{"DesiredState.Host": ""}.AsSelector(),
+				Resource:      "pods",
+			},
+		},
+		// pod with namespace foo and assigned field selector
+		{
+			location: buildLocation(buildResourcePath("watch", "foo", "pods"), buildQueryValues("foo", url.Values{"fields": []string{"DesiredState.Host="}, "resourceVersion": []string{"0"}})),
 			rv:       "0",
 			lw: ListWatch{
 				FieldSelector: labels.Set{"DesiredState.Host": ""}.AsSelector(),
 				Resource:      "pods",
+				Namespace:     "foo",
 			},
 		},
 	}