/* Copyright 2014 Google Inc. All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package cache import ( "fmt" "github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta" "github.com/GoogleCloudPlatform/kubernetes/pkg/util" ) // Indexer is a storage interface that lets you list objects using multiple indexing functions type Indexer interface { Store // Retrieve list of objects that match on the named indexing function Index(indexName string, obj interface{}) ([]interface{}, error) } // IndexFunc knows how to provide an indexed value for an object. type IndexFunc func(obj interface{}) (string, error) // MetaNamespaceIndexFunc is a default index function that indexes based on an object's namespace func MetaNamespaceIndexFunc(obj interface{}) (string, error) { meta, err := meta.Accessor(obj) if err != nil { return "", fmt.Errorf("object has no meta: %v", err) } return meta.Namespace(), nil } // Index maps the indexed value to a set of keys in the store that match on that value type Index map[string]util.StringSet // Indexers maps a name to a IndexFunc type Indexers map[string]IndexFunc // Indices maps a name to an Index type Indices map[string]Index