| /* |
| * ==================================================================== |
| * 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.client5.http.impl.cache; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.hc.client5.http.cache.HttpCacheCASOperation; |
| import org.apache.hc.client5.http.cache.HttpCacheEntry; |
| import org.apache.hc.client5.http.cache.HttpCacheStorage; |
| import org.apache.hc.client5.http.cache.ResourceIOException; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Basic {@link HttpCacheStorage} implementation backed by an instance of |
| * {@link java.util.LinkedHashMap}. In other words, cache entries and |
| * the cached response bodies are held in-memory. This cache does NOT |
| * deallocate resources associated with the cache entries; it is intended |
| * for use with {@link HeapResource} and similar. This is the default cache |
| * storage backend used by {@link CachingHttpClients}. |
| * |
| * @since 4.1 |
| */ |
| @Contract(threading = ThreadingBehavior.SAFE) |
| public class BasicHttpCacheStorage implements HttpCacheStorage { |
| |
| private final CacheMap entries; |
| |
| public BasicHttpCacheStorage(final CacheConfig config) { |
| super(); |
| this.entries = new CacheMap(config.getMaxCacheEntries()); |
| } |
| |
| /** |
| * Places a HttpCacheEntry in the cache |
| * |
| * @param url |
| * Url to use as the cache key |
| * @param entry |
| * HttpCacheEntry to place in the cache |
| */ |
| @Override |
| public synchronized void putEntry( |
| final String url, final HttpCacheEntry entry) throws ResourceIOException { |
| entries.put(url, entry); |
| } |
| |
| /** |
| * Gets an entry from the cache, if it exists |
| * |
| * @param url |
| * Url that is the cache key |
| * @return HttpCacheEntry if one exists, or null for cache miss |
| */ |
| @Override |
| public synchronized HttpCacheEntry getEntry(final String url) throws ResourceIOException { |
| return entries.get(url); |
| } |
| |
| /** |
| * Removes a HttpCacheEntry from the cache |
| * |
| * @param url |
| * Url that is the cache key |
| */ |
| @Override |
| public synchronized void removeEntry(final String url) throws ResourceIOException { |
| entries.remove(url); |
| } |
| |
| @Override |
| public synchronized void updateEntry( |
| final String url, final HttpCacheCASOperation casOperation) throws ResourceIOException { |
| final HttpCacheEntry existingEntry = entries.get(url); |
| entries.put(url, casOperation.execute(existingEntry)); |
| } |
| |
| @Override |
| public Map<String, HttpCacheEntry> getEntries(final Collection<String> keys) throws ResourceIOException { |
| Args.notNull(keys, "Key"); |
| final Map<String, HttpCacheEntry> resultMap = new HashMap<>(keys.size()); |
| for (final String key: keys) { |
| final HttpCacheEntry entry = getEntry(key); |
| if (entry != null) { |
| resultMap.put(key, entry); |
| } |
| } |
| return resultMap; |
| } |
| |
| } |