| /* |
| * Copyright (C) 2011 The Guava Authors |
| * |
| * Licensed 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. |
| */ |
| |
| package com.google.common.cache; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.annotations.GwtIncompatible; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * A collection of common removal listeners. |
| * |
| * @author Charles Fry |
| * @since 10.0 |
| */ |
| @GwtIncompatible |
| @ElementTypesAreNonnullByDefault |
| public final class RemovalListeners { |
| |
| private RemovalListeners() {} |
| |
| /** |
| * Returns a {@code RemovalListener} which processes all eviction notifications using {@code |
| * executor}. |
| * |
| * @param listener the backing listener |
| * @param executor the executor with which removal notifications are asynchronously executed |
| */ |
| public static <K, V> RemovalListener<K, V> asynchronous( |
| final RemovalListener<K, V> listener, final Executor executor) { |
| checkNotNull(listener); |
| checkNotNull(executor); |
| return new RemovalListener<K, V>() { |
| @Override |
| public void onRemoval(final RemovalNotification<K, V> notification) { |
| executor.execute( |
| new Runnable() { |
| @Override |
| public void run() { |
| listener.onRemoval(notification); |
| } |
| }); |
| } |
| }; |
| } |
| } |