001// Copyright 2023 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014package org.apache.tapestry5.services.pageload;
015
016import java.lang.ref.SoftReference;
017
018/**
019 * Defines the types of reference the page cache can use.
020 * @see PageCachingReferenceTypeService
021 * @since 5.8.3
022 */
023public enum ReferenceType
024{
025    /**
026     * Use a soft reference ({@linkplain SoftReference}) to cached page instances.
027     */
028    SOFT, 
029    
030    /**
031     * Use a strong (normal) reference to cached page instances.
032     */
033    STRONG
034}