001 /* 002 * Copyright (C) 2007 The Guava Authors 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 */ 016 017 package com.google.common.base; 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 (imported from Google Collections Library) 025 */ 026 public interface FinalizableReference { 027 /** 028 * Invoked on a background thread after the referent has been garbage collected unless security 029 * restrictions prevented starting a background thread, in which case this method is invoked when 030 * new references are created. 031 */ 032 void finalizeReferent(); 033 }