| /** |
| * 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 org.apache.kerby.has.server; |
| |
| import org.apache.kerby.has.common.HasException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.ServiceLoader; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class HasServerPluginRegistry { |
| static final Logger LOG = LoggerFactory.getLogger(HasServerPluginRegistry.class); |
| |
| private static Map<String, Class> allPlugins = new ConcurrentHashMap<>(); |
| |
| static { |
| ServiceLoader<HasServerPlugin> plugins = ServiceLoader.load(HasServerPlugin.class); |
| |
| for (HasServerPlugin plugin : plugins) { |
| allPlugins.put(plugin.getLoginType(), plugin.getClass()); |
| } |
| } |
| |
| public static Set<String> registeredPlugins() { |
| return Collections.unmodifiableSet(allPlugins.keySet()); |
| } |
| |
| public static boolean registeredPlugin(String name) { |
| return allPlugins.containsKey(name); |
| } |
| |
| public static HasServerPlugin createPlugin(String name) throws HasException { |
| if (!registeredPlugin(name)) { |
| throw new HasException("Unregistered plugin " + name); |
| } |
| try { |
| HasServerPlugin serverPlugin = (HasServerPlugin) allPlugins.get(name).newInstance(); |
| return serverPlugin; |
| } catch (Exception e) { |
| LOG.error("Create {} plugin failed", name, e); |
| throw new HasException(e.getMessage()); |
| } |
| } |
| } |