consul: Adding support for KVSList

consul/state_store.go

@@ -192,6 +192,12 @@ func (s *StateStore) initialize() error {
 				Unique: true,
 				Fields: []string{"Key"},
 			},
+			"id_prefix": &MDBIndex{
+				Virtual:   true,
+				RealIndex: "id",
+				Fields:    []string{"Key"},
+				IdxFunc:   DefaultIndexPrefixFunc,
+			},
 		},
 		Decoder: func(buf []byte) interface{} {
 			out := new(structs.DirEntry)
@@ -749,8 +755,13 @@ func (s *StateStore) KVSGet(key string) (uint64, *structs.DirEntry, error) {
 }
 
 // KVSList is used to list all KV entries with a prefix
-func (s *StateStore) KVSList() (uint64, structs.DirEntries, error) {
-	return 0, nil, nil
+func (s *StateStore) KVSList(prefix string) (uint64, structs.DirEntries, error) {
+	idx, res, err := s.kvsTable.Get("id_prefix", prefix)
+	ents := make(structs.DirEntries, len(res))
+	for idx, r := range res {
+		ents[idx] = r.(*structs.DirEntry)
+	}
+	return idx, ents, err
 }
 
 // KVSDelete is used to delete a KVS entry
@@ -778,6 +789,7 @@ func (s *StateStore) KVSDelete(index uint64, key string) error {
 
 // KVSDeleteTree is used to delete all keys with a given prefix
 func (s *StateStore) KVSDeleteTree() error {
+	// TODO:
 	return nil
 }
 

consul/state_store_test.go

@@ -1107,3 +1107,59 @@ func TestKVSCheckAndSet(t *testing.T) {
 		t.Fatalf("expected commit")
 	}
 }
+
+func TestKVS_List(t *testing.T) {
+	store, err := testStateStore()
+	if err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	defer store.Close()
+
+	// Should not exist
+	idx, ents, err := store.KVSList("/web")
+	if err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	if idx != 0 {
+		t.Fatalf("bad: %v", idx)
+	}
+	if len(ents) != 0 {
+		t.Fatalf("bad: %v", ents)
+	}
+
+	// Create the entries
+	d := &structs.DirEntry{Key: "/web/a", Flags: 42, Value: []byte("test")}
+	if err := store.KVSSet(1000, d); err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	d = &structs.DirEntry{Key: "/web/b", Flags: 42, Value: []byte("test")}
+	if err := store.KVSSet(1001, d); err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	d = &structs.DirEntry{Key: "/web/sub/c", Flags: 42, Value: []byte("test")}
+	if err := store.KVSSet(1002, d); err != nil {
+		t.Fatalf("err: %v", err)
+	}
+
+	// Should list
+	idx, ents, err = store.KVSList("/web")
+	if err != nil {
+		t.Fatalf("err: %v", err)
+	}
+	if idx != 1002 {
+		t.Fatalf("bad: %v", idx)
+	}
+	if len(ents) != 3 {
+		t.Fatalf("bad: %v", ents)
+	}
+
+	if ents[0].Key != "/web/a" {
+		t.Fatalf("bad: %v", ents[0])
+	}
+	if ents[1].Key != "/web/b" {
+		t.Fatalf("bad: %v", ents[1])
+	}
+	if ents[2].Key != "/web/sub/c" {
+		t.Fatalf("bad: %v", ents[2])
+	}
+}