| /* |
| * 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.jena.fuseki.server; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.StringJoiner; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.function.BiConsumer; |
| |
| import org.apache.jena.atlas.logging.Log; |
| import org.apache.jena.fuseki.servlets.HttpAction; |
| |
| /** Collection of endpoints for a dispatch point. |
| * A dispatch point is a URL name, without queyr string or content-type. |
| * {@linkplain Dispatcher#chooseOperation(HttpAction)} looks at request and decides which |
| * {@linkplain Operation} is being requested. |
| * |
| * {@linkplain Dispatcher#chooseEndpoint} looks at request, |
| * and a {@linkplain DataService} |
| * and decides the endpoint. |
| * |
| * There can be only be one endpoint for each operation in a {@code EndpointSet}. |
| */ |
| public class EndpointSet { |
| private final String name; |
| // Fast path for a set of one endpoint. |
| private Endpoint single; |
| private Map<Operation, Endpoint> endpoints = new ConcurrentHashMap<>(); |
| |
| public EndpointSet(String name) { |
| super(); |
| this.name = name; |
| this.single = null; |
| } |
| |
| public void put(Endpoint endpoint) { |
| if ( name != null ) { |
| if ( ! endpoint.getName().equals(name) ) |
| Log.warn(EndpointSet.class, "Different endpoint name: set = '"+name+"' : endpoint = '"+endpoint.getName()+"'"); |
| } else { |
| if ( ! endpoint.isUnnamed() ) |
| Log.warn(EndpointSet.class, "Different endpoint name: set = '' : endpoint = '"+endpoint.getName()+"'"); |
| } |
| Operation operation = endpoint.getOperation(); |
| if ( endpoints.containsKey(operation) ) { |
| Log.warn(EndpointSet.class, "Redefining endpoint for "+operation); |
| } |
| Endpoint endpointPrev = endpoints.put(operation, endpoint); |
| resetSingle(); |
| } |
| |
| public void remove(Endpoint endpoint) { |
| endpoints.remove(endpoint.getOperation()); |
| resetSingle(); |
| } |
| |
| public Endpoint get(Operation operation) { |
| return endpoints.get(operation); |
| } |
| |
| public boolean contains(Operation operation) { |
| return endpoints.containsKey(operation); |
| } |
| |
| public boolean isEmpty() { |
| return endpoints.isEmpty(); |
| } |
| |
| public int size() { |
| return endpoints.size(); |
| } |
| |
| public void forEach(BiConsumer<Operation, Endpoint> action) { endpoints.forEach(action); } |
| |
| private void resetSingle() { |
| if ( endpoints.size() == 1 ) |
| single = endpoints.values().iterator().next(); |
| else { |
| // Set to null IFF not null. Debug point. |
| if ( single != null) |
| single = null; |
| } |
| } |
| |
| public Collection<Endpoint> endpoints() { return endpoints.values(); } |
| |
| public Collection<Operation> operations() { return endpoints.keySet(); } |
| |
| /** Get the Endpoint for a singleton EndpointSet */ |
| public Endpoint getExactlyOne() { |
| return single; |
| } |
| |
| @Override |
| public String toString() { |
| String x = (name==null)?"":name; |
| StringJoiner sj = new StringJoiner(", ", "[", "]"); |
| operations().forEach(op->sj.add(op.toString())); |
| return x+sj.toString(); |
| } |
| } |