| /* |
| * Copyright 1999,2004-2006 The Apache Software Foundation. |
| * |
| * 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 org.apache.catalina.tribes.io; |
| |
| import java.util.Queue; |
| import java.util.LinkedList; |
| |
| |
| /** |
| * |
| * @author Filip Hanik |
| * @version 1.0 |
| */ |
| class BufferPool14Impl implements BufferPool.BufferPoolAPI { |
| protected int maxSize; |
| protected int size = 0; |
| protected LinkedList queue = new LinkedList(); |
| |
| public void setMaxSize(int bytes) { |
| this.maxSize = bytes; |
| } |
| |
| public synchronized int addAndGet(int val) { |
| size = size + (val); |
| return size; |
| } |
| |
| |
| |
| public synchronized XByteBuffer getBuffer(int minSize, boolean discard) { |
| XByteBuffer buffer = (XByteBuffer)(queue.size()>0?queue.remove(0):null); |
| if ( buffer != null ) addAndGet(-buffer.getCapacity()); |
| if ( buffer == null ) buffer = new XByteBuffer(minSize,discard); |
| else if ( buffer.getCapacity() <= minSize ) buffer.expand(minSize); |
| buffer.setDiscard(discard); |
| buffer.reset(); |
| return buffer; |
| } |
| |
| public synchronized void returnBuffer(XByteBuffer buffer) { |
| if ( (size + buffer.getCapacity()) <= maxSize ) { |
| addAndGet(buffer.getCapacity()); |
| queue.add(buffer); |
| } |
| } |
| |
| public synchronized void clear() { |
| queue.clear(); |
| size = 0; |
| } |
| |
| public int getMaxSize() { |
| return maxSize; |
| } |
| |
| } |