| /* |
| * 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.commons.logging.LogFactory; |
| |
| import org.apache.commons.logging.Log; |
| |
| /** |
| * |
| * @author Filip Hanik |
| * |
| * @version 1.0 |
| */ |
| public class BufferPool { |
| protected static Log log = LogFactory.getLog(BufferPool.class); |
| |
| public static int DEFAULT_POOL_SIZE = 100*1024*1024; //100MB |
| |
| |
| |
| protected static BufferPool instance = null; |
| protected BufferPoolAPI pool = null; |
| |
| 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 = null; |
| Class clazz = null; |
| try { |
| clazz = Class.forName("org.apache.catalina.tribes.io.BufferPool15Impl"); |
| pool = (BufferPoolAPI)clazz.newInstance(); |
| } catch ( Throwable x ) { |
| try { |
| clazz = Class.forName("org.apache.catalina.tribes.io.BufferPool14Impl"); |
| pool = (BufferPoolAPI)clazz.newInstance(); |
| } catch ( Throwable e ) { |
| log.warn("Unable to initilize BufferPool, not pooling XByteBuffer objects:"+x.getMessage()); |
| if ( log.isDebugEnabled() ) log.debug("Unable to initilize BufferPool, not pooling XByteBuffer objects:",x); |
| } |
| } |
| pool.setMaxSize(DEFAULT_POOL_SIZE); |
| log.info("Created a buffer pool with max size:"+DEFAULT_POOL_SIZE+" bytes of type:"+(clazz!=null?clazz.getName():"null")); |
| instance = new BufferPool(pool); |
| }//end if |
| }//sync |
| }//end if |
| 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(); |
| } |
| } |