| /* |
| * 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.catalina.tribes.io; |
| |
| |
| import org.apache.catalina.tribes.util.StringManager; |
| import org.apache.juli.logging.Log; |
| import org.apache.juli.logging.LogFactory; |
| |
| /** |
| * |
| * |
| * @version 1.0 |
| */ |
| public class BufferPool { |
| private static final Log log = LogFactory.getLog(BufferPool.class); |
| |
| public static final int DEFAULT_POOL_SIZE = 100*1024*1024; //100MB |
| |
| protected static final StringManager sm = |
| StringManager.getManager(BufferPool.class.getPackage().getName()); |
| |
| |
| |
| protected static volatile BufferPool instance = null; |
| protected final BufferPoolAPI pool; |
| |
| private BufferPool(BufferPoolAPI pool) { |
| this.pool = pool; |
| } |
| |
| public XByteBuffer getBuffer(int minSize, boolean discard) { |
| if ( pool != null ) return pool.getBuffer(minSize, discard); |
| else return new XByteBuffer(minSize,discard); |
| } |
| |
| public void returnBuffer(XByteBuffer buffer) { |
| if ( pool != null ) pool.returnBuffer(buffer); |
| } |
| |
| public void clear() { |
| if ( pool != null ) pool.clear(); |
| } |
| |
| |
| public static BufferPool getBufferPool() { |
| if (instance == null) { |
| synchronized (BufferPool.class) { |
| if (instance == null) { |
| BufferPoolAPI pool = new BufferPool15Impl(); |
| pool.setMaxSize(DEFAULT_POOL_SIZE); |
| log.info(sm.getString("bufferPool.created", |
| Integer.toString(DEFAULT_POOL_SIZE), pool.getClass().getName())); |
| instance = new BufferPool(pool); |
| } |
| } |
| } |
| return instance; |
| } |
| |
| |
| public static interface BufferPoolAPI { |
| public void setMaxSize(int bytes); |
| |
| public XByteBuffer getBuffer(int minSize, boolean discard); |
| |
| public void returnBuffer(XByteBuffer buffer); |
| |
| public void clear(); |
| } |
| } |