| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.knox.gateway.topology.discovery.ambari; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.ServiceLoader; |
| |
| /** |
| * Factory for creating cluster-specific service URLs. |
| */ |
| public class ServiceURLFactory { |
| |
| private Map<String, ServiceURLCreator> urlCreators = new HashMap<>(); |
| |
| private ServiceURLCreator defaultURLCreator; |
| |
| |
| private ServiceURLFactory(AmbariCluster cluster) { |
| // Default URL creator |
| defaultURLCreator = new AmbariDynamicServiceURLCreator(cluster); |
| |
| // Custom URL creators (too complex for simple mapping configuration) |
| ServiceLoader<ServiceURLCreator> creators = ServiceLoader.load(ServiceURLCreator.class); |
| for (ServiceURLCreator creator : creators) { |
| String type = creator.getTargetService(); |
| if (type != null && !type.isEmpty()) { |
| creator.init(cluster); |
| urlCreators.put(creator.getTargetService(), creator); |
| } |
| } |
| } |
| |
| |
| /** |
| * Create a new factory for the specified cluster. |
| * |
| * @param cluster The cluster. |
| * |
| * @return A ServiceURLFactory instance. |
| */ |
| public static ServiceURLFactory newInstance(AmbariCluster cluster) { |
| return new ServiceURLFactory(cluster); |
| } |
| |
| |
| /** |
| * Create one or more cluster-specific URLs for the specified service. |
| * |
| * @param service The service identifier. |
| * @param serviceParams A map of parameters and their corresponding values for the specified service. |
| * |
| * @return A List of service URL strings; the list may be empty. |
| */ |
| public List<String> create(String service, Map<String, String> serviceParams) { |
| |
| ServiceURLCreator creator = urlCreators.get(service); |
| if (creator == null) { |
| creator = defaultURLCreator; |
| } |
| |
| return new ArrayList<>(creator.create(service, serviceParams)); |
| } |
| |
| } |