| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 metadata |
| |
| import ( |
| "log" |
| ) |
| |
| // MetaData meta data from registration center |
| type MetaData interface { |
| ShowChildren() (map[string][]string, error) |
| } |
| |
| // Factory metaData factory function |
| type Factory func(name string, zkAddrs []string) MetaData |
| |
| var factMap = make(map[string]Factory) |
| |
| // Register a factory into factMap |
| func Register(name string, fact Factory) { |
| if _, ok := factMap[name]; ok { |
| log.Printf("duplicate name: %s", name) |
| } |
| factMap[name] = fact |
| } |
| |
| // GetFactory get a factory function from factMap |
| func GetFactory(name string) (fact Factory, ok bool) { |
| fact, ok = factMap[name] |
| return |
| } |