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}