| /* |
| * 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.commons.jcs.jcache.extras.writer; |
| |
| import javax.cache.Cache; |
| import javax.cache.configuration.Factory; |
| import javax.cache.integration.CacheWriter; |
| import javax.cache.integration.CacheWriterException; |
| import java.io.Closeable; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| public class AsyncCacheWriter<K, V> implements CacheWriter<K, V>, Closeable, Factory<CacheWriter<K, V>> |
| { |
| private static final Logger LOGGER = Logger.getLogger(AsyncCacheWriter.class.getName()); |
| |
| private final CacheWriter<K, V> writer; |
| private final ExecutorService pool; |
| |
| public AsyncCacheWriter(final CacheWriter<K, V> delegate, final int poolSize) |
| { |
| writer = delegate; |
| pool = Executors.newFixedThreadPool( |
| poolSize, new DaemonThreadFactory(delegate.getClass().getName() + "-" + delegate.hashCode() + "-")); |
| } |
| |
| @Override |
| public void write(final Cache.Entry<? extends K, ? extends V> entry) throws CacheWriterException |
| { |
| pool.submit(new ExceptionProtectionRunnable() |
| { |
| @Override |
| public void doRun() |
| { |
| writer.write(entry); |
| } |
| }); |
| } |
| |
| @Override |
| public void writeAll(final Collection<Cache.Entry<? extends K, ? extends V>> entries) throws CacheWriterException |
| { |
| pool.submit(new ExceptionProtectionRunnable() |
| { |
| @Override |
| public void doRun() |
| { |
| writer.writeAll(entries); |
| } |
| }); |
| } |
| |
| @Override |
| public void delete(final Object key) throws CacheWriterException |
| { |
| pool.submit(new ExceptionProtectionRunnable() |
| { |
| @Override |
| public void doRun() |
| { |
| writer.delete(key); |
| } |
| }); |
| } |
| |
| @Override |
| public void deleteAll(final Collection<?> keys) throws CacheWriterException |
| { |
| pool.submit(new ExceptionProtectionRunnable() |
| { |
| @Override |
| public void doRun() |
| { |
| writer.deleteAll(keys); |
| } |
| }); |
| } |
| |
| @Override |
| public void close() throws IOException |
| { |
| final List<Runnable> runnables = pool.shutdownNow(); |
| for (final Runnable r : runnables) |
| { |
| r.run(); |
| } |
| } |
| |
| @Override |
| public CacheWriter<K, V> create() |
| { |
| return this; |
| } |
| |
| // avoid dep on impl |
| private static class DaemonThreadFactory implements ThreadFactory |
| { |
| private final AtomicInteger index = new AtomicInteger(1); |
| private final String prefix; |
| |
| public DaemonThreadFactory(final String prefix) |
| { |
| this.prefix = prefix; |
| } |
| |
| @Override |
| public Thread newThread( final Runnable runner ) |
| { |
| final Thread t = new Thread( runner ); |
| t.setName(prefix + index.getAndIncrement()); |
| t.setDaemon(true); |
| return t; |
| } |
| } |
| |
| private static abstract class ExceptionProtectionRunnable implements Runnable |
| { |
| @Override |
| public void run() |
| { |
| try |
| { |
| doRun(); |
| } |
| catch (final Exception e) |
| { |
| LOGGER.log(Level.SEVERE, e.getMessage(), e); |
| } |
| } |
| |
| protected abstract void doRun(); |
| } |
| } |