001/*
002 *  Copyright 2018 Anyware Services
003 *
004 *  Licensed under the Apache License, Version 2.0 (the "License");
005 *  you may not use this file except in compliance with the License.
006 *  You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 *  Unless required by applicable law or agreed to in writing, software
011 *  distributed under the License is distributed on an "AS IS" BASIS,
012 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 *  See the License for the specific language governing permissions and
014 *  limitations under the License.
015 */
016package org.ametys.web.resources;
017
018import java.util.function.Function;
019import java.util.function.Predicate;
020
021import org.ametys.runtime.plugin.component.AbstractThreadSafeComponentExtensionPoint;
022
023/**
024 * Extension point that provides cacheable information for http headers on front resources
025 */
026public class FrontCacheableResourceExtensionPoint extends AbstractThreadSafeComponentExtensionPoint<FrontCacheableResource>
027{
028    /** avalon role */
029    public static final String ROLE = FrontCacheableResourceExtensionPoint.class.getName();
030    
031
032    /**
033     * Test if the resource should be cached
034     * @param uri The uri of the resource
035     * @return True if the front resource should be cached
036     */
037    public boolean isCacheable(String uri)
038    {
039        Function<String, FrontCacheableResource> getExtension = id -> getExtension(id);
040        Predicate<FrontCacheableResource> isNotCacheable = extension -> extension.isNotCacheable(uri);
041        
042        // Returns false if any extension should not be cached
043        return !getExtensionsIds().stream()
044                .map(getExtension)
045                .filter(isNotCacheable)
046                .findAny()
047                .isPresent();
048    }
049}