001/* 002 * Copyright (C) 2007 The Guava Authors 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 005 * in compliance with the License. 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 distributed under the License 010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 011 * or implied. See the License for the specific language governing permissions and limitations under 012 * the License. 013 */ 014 015package com.google.common.base; 016 017import com.google.common.annotations.GwtIncompatible; 018 019/** 020 * Implemented by references that have code to run after garbage collection of their referents. 021 * 022 * @see FinalizableReferenceQueue 023 * @author Bob Lee 024 * @since 2.0 025 */ 026@GwtIncompatible 027public interface FinalizableReference { 028 /** 029 * Invoked on a background thread after the referent has been garbage collected unless security 030 * restrictions prevented starting a background thread, in which case this method is invoked when 031 * new references are created. 032 */ 033 void finalizeReferent(); 034}