| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| import java.io.IOException; |
| import java.util.Set; |
| import java.util.concurrent.CopyOnWriteArraySet; |
| |
| import org.apache.lucene.util.IOUtils; |
| |
| /** |
| * A {@link MultiReader} that has its own cache key, occasionally useful for |
| * testing purposes. |
| */ |
| public final class OwnCacheKeyMultiReader extends MultiReader { |
| |
| private final Set<ClosedListener> readerClosedListeners = new CopyOnWriteArraySet<>(); |
| |
| private final CacheHelper cacheHelper = new CacheHelper() { |
| private final CacheKey cacheKey = new CacheKey(); |
| |
| @Override |
| public CacheKey getKey() { |
| return cacheKey; |
| } |
| |
| @Override |
| public void addClosedListener(ClosedListener listener) { |
| ensureOpen(); |
| readerClosedListeners.add(listener); |
| } |
| |
| }; |
| |
| /** Sole constructor. */ |
| public OwnCacheKeyMultiReader(IndexReader... subReaders) throws IOException { |
| super(subReaders); |
| } |
| |
| @Override |
| public CacheHelper getReaderCacheHelper() { |
| return cacheHelper; |
| } |
| |
| @Override |
| void notifyReaderClosedListeners() throws IOException { |
| synchronized(readerClosedListeners) { |
| IOUtils.applyToAll(readerClosedListeners, l -> l.onClose(cacheHelper.getKey())); |
| } |
| } |
| |
| } |