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Refactor *Namespacer.List().

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Refactor storePodsNamespacer.List() and
storeReplicationContollersNamespacer.List().  They are the same
function, just with different signatures.

This fixes a bug where, when we fell back on a brute force approach, we
were still returning an error.

Also change to explicit return without named return values.
This commit is contained in:
Matt Liggett 2016-05-23 15:12:27 -07:00
parent caa2e1713c
commit 1fee311282
2 changed files with 146 additions and 74 deletions
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30
pkg/client/cache/listers.go vendored
View File

@ -76,38 +76,39 @@ type storePodsNamespacer struct {
// Please note that selector is filtering among the pods that have gotten into
// the store; there may have been some filtering that already happened before
// that.
func (s storePodsNamespacer) List(selector labels.Selector) (pods api.PodList, err error) {
list := api.PodList{}
func (s storePodsNamespacer) List(selector labels.Selector) (api.PodList, error) {
pods := api.PodList{}
if s.namespace == api.NamespaceAll {
for _, m := range s.indexer.List() {
pod := m.(*api.Pod)
if selector.Matches(labels.Set(pod.Labels)) {
list.Items = append(list.Items, *pod)
pods.Items = append(pods.Items, *pod)
}
}
return list, nil
return pods, nil
}
key := &api.Pod{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
items, err := s.indexer.Index(NamespaceIndex, key)
if err != nil {
// Ignore error; do slow search without index.
glog.Warningf("can not retrieve list of objects using index : %v", err)
for _, m := range s.indexer.List() {
pod := m.(*api.Pod)
if s.namespace == pod.Namespace && selector.Matches(labels.Set(pod.Labels)) {
list.Items = append(list.Items, *pod)
pods.Items = append(pods.Items, *pod)
}
}
return list, err
return pods, nil
}
for _, m := range items {
pod := m.(*api.Pod)
if selector.Matches(labels.Set(pod.Labels)) {
list.Items = append(list.Items, *pod)
pods.Items = append(pods.Items, *pod)
}
}
return list, nil
return pods, nil
}
// Exists returns true if a pod matching the namespace/name of the given pod exists in the store.
@ -194,7 +195,9 @@ type storeReplicationControllersNamespacer struct {
namespace string
}
func (s storeReplicationControllersNamespacer) List(selector labels.Selector) (controllers []api.ReplicationController, err error) {
func (s storeReplicationControllersNamespacer) List(selector labels.Selector) ([]api.ReplicationController, error) {
controllers := []api.ReplicationController{}
if s.namespace == api.NamespaceAll {
for _, m := range s.indexer.List() {
rc := *(m.(*api.ReplicationController))
@ -202,12 +205,13 @@ func (s storeReplicationControllersNamespacer) List(selector labels.Selector) (c
controllers = append(controllers, rc)
}
}
return
return controllers, nil
}
key := &api.ReplicationController{ObjectMeta: api.ObjectMeta{Namespace: s.namespace}}
items, err := s.indexer.Index(NamespaceIndex, key)
if err != nil {
// Ignore error; do slow search without index.
glog.Warningf("can not retrieve list of objects using index : %v", err)
for _, m := range s.indexer.List() {
rc := *(m.(*api.ReplicationController))
@ -215,7 +219,7 @@ func (s storeReplicationControllersNamespacer) List(selector labels.Selector) (c
controllers = append(controllers, rc)
}
}
return
return controllers, nil
}
for _, m := range items {
rc := *(m.(*api.ReplicationController))
@ -223,7 +227,7 @@ func (s storeReplicationControllersNamespacer) List(selector labels.Selector) (c
controllers = append(controllers, rc)
}
}
return
return controllers, nil
}
// GetPodControllers returns a list of replication controllers managing a pod. Returns an error only if no matching controllers are found.

190
pkg/client/cache/listers_test.go vendored
View File

@ -124,26 +124,56 @@ func TestStoreToNodeConditionLister(t *testing.T) {
}
func TestStoreToReplicationControllerLister(t *testing.T) {
store := NewIndexer(MetaNamespaceKeyFunc, Indexers{NamespaceIndex: MetaNamespaceIndexFunc})
lister := StoreToReplicationControllerLister{store}
testCases := []struct {
inRCs []*api.ReplicationController
list func() ([]api.ReplicationController, error)
outRCNames sets.String
expectErr bool
description string
inRCs []*api.ReplicationController
list func(StoreToReplicationControllerLister) ([]api.ReplicationController, error)
outRCNames sets.String
expectErr bool
onlyIfIndexedByNamespace bool
}{
// Basic listing with all labels and no selectors
{
description: "Verify we can search all namespaces",
inRCs: []*api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "bar"},
},
{
ObjectMeta: api.ObjectMeta{Name: "hmm", Namespace: "hmm"},
},
},
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
return lister.ReplicationControllers(api.NamespaceAll).List(labels.Set{}.AsSelector())
},
outRCNames: sets.NewString("hmm", "foo"),
},
{
description: "Verify we can search a specific namespace",
inRCs: []*api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "foo", Namespace: "bar"},
},
{
ObjectMeta: api.ObjectMeta{Name: "hmm", Namespace: "hmm"},
},
},
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
return lister.ReplicationControllers("hmm").List(labels.Set{}.AsSelector())
},
outRCNames: sets.NewString("hmm"),
},
{
description: "Basic listing with all labels and no selectors",
inRCs: []*api.ReplicationController{
{ObjectMeta: api.ObjectMeta{Name: "basic"}},
},
list: func() ([]api.ReplicationController, error) {
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
return lister.List()
},
outRCNames: sets.NewString("basic"),
},
// No pod labels
{
description: "No pod labels",
inRCs: []*api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "basic", Namespace: "ns"},
@ -152,7 +182,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
},
},
},
list: func() ([]api.ReplicationController, error) {
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{Name: "pod1", Namespace: "ns"},
}
@ -161,14 +191,14 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
outRCNames: sets.NewString(),
expectErr: true,
},
// No RC selectors
{
description: "No RC selectors",
inRCs: []*api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "basic", Namespace: "ns"},
},
},
list: func() ([]api.ReplicationController, error) {
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod1",
@ -181,8 +211,8 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
outRCNames: sets.NewString(),
expectErr: true,
},
// Matching labels to selectors and namespace
{
description: "Matching labels to selectors and namespace",
inRCs: []*api.ReplicationController{
{
ObjectMeta: api.ObjectMeta{Name: "foo"},
@ -197,7 +227,7 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
},
},
},
list: func() ([]api.ReplicationController, error) {
list: func(lister StoreToReplicationControllerLister) ([]api.ReplicationController, error) {
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod1",
@ -207,30 +237,43 @@ func TestStoreToReplicationControllerLister(t *testing.T) {
}
return lister.GetPodControllers(pod)
},
outRCNames: sets.NewString("bar"),
outRCNames: sets.NewString("bar"),
onlyIfIndexedByNamespace: true,
},
}
for _, c := range testCases {
for _, r := range c.inRCs {
store.Add(r)
}
for _, withIndex := range []bool{true, false} {
if c.onlyIfIndexedByNamespace && !withIndex {
continue
}
var store Indexer
if withIndex {
store = NewIndexer(MetaNamespaceKeyFunc, Indexers{NamespaceIndex: MetaNamespaceIndexFunc})
} else {
store = NewIndexer(MetaNamespaceKeyFunc, Indexers{})
}
gotControllers, err := c.list()
if err != nil && c.expectErr {
continue
} else if c.expectErr {
t.Error("Expected error, got none")
continue
} else if err != nil {
t.Errorf("Unexpected error %#v", err)
continue
}
gotNames := make([]string, len(gotControllers))
for ix := range gotControllers {
gotNames[ix] = gotControllers[ix].Name
}
if !c.outRCNames.HasAll(gotNames...) || len(gotNames) != len(c.outRCNames) {
t.Errorf("Unexpected got controllers %+v expected %+v", gotNames, c.outRCNames)
for _, r := range c.inRCs {
store.Add(r)
}
gotControllers, err := c.list(StoreToReplicationControllerLister{store})
if err != nil && c.expectErr {
continue
} else if c.expectErr {
t.Errorf("(%q, withIndex=%v) Expected error, got none", c.description, withIndex)
continue
} else if err != nil {
t.Errorf("(%q, withIndex=%v) Unexpected error %#v", c.description, withIndex, err)
continue
}
gotNames := make([]string, len(gotControllers))
for ix := range gotControllers {
gotNames[ix] = gotControllers[ix].Name
}
if !c.outRCNames.HasAll(gotNames...) || len(gotNames) != len(c.outRCNames) {
t.Errorf("(%q, withIndex=%v) Unexpected got controllers %+v expected %+v", c.description, withIndex, gotNames, c.outRCNames)
}
}
}
}
@ -645,49 +688,74 @@ func TestStoreToJobLister(t *testing.T) {
}
func TestStoreToPodLister(t *testing.T) {
store := NewIndexer(MetaNamespaceKeyFunc, Indexers{NamespaceIndex: MetaNamespaceIndexFunc})
ids := []string{"foo", "bar", "baz"}
for _, id := range ids {
// We test with and without a namespace index, because StoreToPodLister has
// special logic to work on namespaces even when no namespace index is
// present.
stores := []Indexer{
NewIndexer(MetaNamespaceKeyFunc, Indexers{NamespaceIndex: MetaNamespaceIndexFunc}),
NewIndexer(MetaNamespaceKeyFunc, Indexers{}),
}
for _, store := range stores {
ids := []string{"foo", "bar", "baz"}
for _, id := range ids {
store.Add(&api.Pod{
ObjectMeta: api.ObjectMeta{
Name: id,
Labels: map[string]string{"name": id},
},
})
}
store.Add(&api.Pod{
ObjectMeta: api.ObjectMeta{
Name: id,
Labels: map[string]string{"name": id},
Name: "quux",
Namespace: api.NamespaceDefault,
Labels: map[string]string{"name": "quux"},
},
})
}
spl := StoreToPodLister{store}
spl := StoreToPodLister{store}
for _, id := range ids {
got, err := spl.List(labels.Set{"name": id}.AsSelector())
// Verify that we can always look up by Namespace.
defaultPods, err := spl.Pods(api.NamespaceDefault).List(labels.Set{}.AsSelector())
if err != nil {
t.Errorf("Unexpected error: %v", err)
continue
}
if e, a := 1, len(got); e != a {
} else if e, a := 1, len(defaultPods.Items); e != a {
t.Errorf("Expected %v, got %v", e, a)
continue
}
if e, a := id, got[0].Name; e != a {
} else if e, a := "quux", defaultPods.Items[0].Name; e != a {
t.Errorf("Expected %v, got %v", e, a)
continue
}
exists, err := spl.Exists(&api.Pod{ObjectMeta: api.ObjectMeta{Name: id}})
for _, id := range ids {
got, err := spl.List(labels.Set{"name": id}.AsSelector())
if err != nil {
t.Errorf("Unexpected error: %v", err)
continue
}
if e, a := 1, len(got); e != a {
t.Errorf("Expected %v, got %v", e, a)
continue
}
if e, a := id, got[0].Name; e != a {
t.Errorf("Expected %v, got %v", e, a)
continue
}
exists, err := spl.Exists(&api.Pod{ObjectMeta: api.ObjectMeta{Name: id}})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if !exists {
t.Errorf("exists returned false for %v", id)
}
}
exists, err := spl.Exists(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "qux"}})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if !exists {
t.Errorf("exists returned false for %v", id)
if exists {
t.Error("Unexpected pod exists")
}
}
exists, err := spl.Exists(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "qux"}})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if exists {
t.Error("Unexpected pod exists")
}
}
func TestStoreToServiceLister(t *testing.T) {