001    /*
002     * Copyright (C) 2007 Google Inc.
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    
015    package com.google.common.base;
016    
017    /**
018     * Implemented by references that have code to run after garbage collection of their referents.
019     *
020     * @see FinalizableReferenceQueue
021     * @author Bob Lee
022     * @since 2 (imported from Google Collections Library)
023     */
024    public interface FinalizableReference {
025      /**
026       * Invoked on a background thread after the referent has been garbage collected unless security
027       * restrictions prevented starting a background thread, in which case this method is invoked when
028       * new references are created.
029       */
030      void finalizeReferent();
031    }