| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.protocol; |
| |
| import java.util.Locale; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.function.Supplier; |
| import org.apache.hc.core5.http.HttpRequest; |
| import org.apache.hc.core5.http.HttpRequestMapper; |
| import org.apache.hc.core5.http.MisdirectedRequestException; |
| import org.apache.hc.core5.net.URIAuthority; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Generic registry of request handlers that can be resolved by properties of request messages. |
| * |
| * @param <T> request handler type. |
| * |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL) |
| public class RequestHandlerRegistry<T> implements HttpRequestMapper<T> { |
| |
| private final static String LOCALHOST = "localhost"; |
| private final static String IP_127_0_0_1 = "127.0.0.1"; |
| |
| private final String canonicalHostName; |
| private final Supplier<LookupRegistry<T>> registrySupplier; |
| private final LookupRegistry<T> primary; |
| private final ConcurrentMap<String, LookupRegistry<T>> virtualMap; |
| |
| public RequestHandlerRegistry(final String canonicalHostName, final Supplier<LookupRegistry<T>> registrySupplier) { |
| this.canonicalHostName = Args.notNull(canonicalHostName, "Canonical hostname").toLowerCase(Locale.ROOT); |
| this.registrySupplier = registrySupplier != null ? registrySupplier : new Supplier<LookupRegistry<T>>() { |
| |
| @Override |
| public LookupRegistry<T> get() { |
| return new UriPatternMatcher<>(); |
| } |
| |
| }; |
| this.primary = this.registrySupplier.get(); |
| this.virtualMap = new ConcurrentHashMap<>(); |
| } |
| |
| public RequestHandlerRegistry(final String canonicalHostName, final UriPatternType patternType) { |
| this(canonicalHostName, new Supplier<LookupRegistry<T>>() { |
| |
| @Override |
| public LookupRegistry<T> get() { |
| return UriPatternType.newMatcher(patternType); |
| } |
| |
| }); |
| } |
| |
| public RequestHandlerRegistry(final UriPatternType patternType) { |
| this(LOCALHOST, patternType); |
| } |
| |
| public RequestHandlerRegistry() { |
| this(LOCALHOST, UriPatternType.URI_PATTERN); |
| } |
| |
| private LookupRegistry<T> getPatternMatcher(final String hostname) { |
| if (hostname == null || |
| hostname.equals(canonicalHostName) || hostname.equals(LOCALHOST) || hostname.equals(IP_127_0_0_1)) { |
| return primary; |
| } |
| return virtualMap.get(hostname); |
| } |
| |
| @Override |
| public T resolve(final HttpRequest request, final HttpContext context) throws MisdirectedRequestException { |
| final URIAuthority authority = request.getAuthority(); |
| final String key = authority != null ? authority.getHostName().toLowerCase(Locale.ROOT) : null; |
| final LookupRegistry<T> patternMatcher = getPatternMatcher(key); |
| if (patternMatcher == null) { |
| throw new MisdirectedRequestException("Not authoritative"); |
| } |
| String path = request.getPath(); |
| final int i = path.indexOf('?'); |
| if (i != -1) { |
| path = path.substring(0, i); |
| } |
| return patternMatcher.lookup(path); |
| } |
| |
| public void register(final String hostname, final String uriPattern, final T object) { |
| Args.notBlank(uriPattern, "URI pattern"); |
| if (object == null) { |
| return; |
| } |
| final String key = hostname != null ? hostname.toLowerCase(Locale.ROOT) : null; |
| if (hostname == null || hostname.equals(canonicalHostName) || hostname.equals(LOCALHOST)) { |
| primary.register(uriPattern, object); |
| } else { |
| LookupRegistry<T> patternMatcher = virtualMap.get(key); |
| if (patternMatcher == null) { |
| final LookupRegistry<T> newPatternMatcher = registrySupplier.get(); |
| patternMatcher = virtualMap.putIfAbsent(key, newPatternMatcher); |
| if (patternMatcher == null) { |
| patternMatcher = newPatternMatcher; |
| } |
| } |
| patternMatcher.register(uriPattern, object); |
| } |
| } |
| |
| } |