| package org.apache.directmemory.guava; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import com.google.common.cache.RemovalListener; |
| import com.google.common.cache.RemovalNotification; |
| |
| /** |
| * Listener which forwards the notifications to a delegate. It is used to bridge the |
| * Guava Cache with DirectMemory CacheService |
| * @since 0.2 |
| */ |
| public class ForwardingListener<K, V> |
| implements RemovalListener<K, V> |
| { |
| private RemovalListener<K, V> delegate; |
| |
| public ForwardingListener() |
| { |
| } |
| |
| public ForwardingListener( RemovalListener<K, V> delegate ) |
| { |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public void onRemoval( RemovalNotification<K, V> notification ) |
| { |
| if ( delegate != null ) |
| { |
| delegate.onRemoval( notification ); |
| } |
| } |
| |
| public void setDelegate( RemovalListener<K, V> delegate ) |
| { |
| this.delegate = delegate; |
| } |
| |
| public static <K, V> ForwardingListener<K, V> newInstance() |
| { |
| return new ForwardingListener<K, V>(); |
| } |
| |
| public static <K, V> ForwardingListener<K, V> newInstance( RemovalListener<K, V> delegate ) |
| { |
| return new ForwardingListener<K, V>( delegate ); |
| } |
| } |