org.apache.catalina.tribes.io.BufferPool15Impl Maven / Gradle / Ivy
/*
* 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 java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicInteger;
class BufferPool15Impl implements BufferPool.BufferPoolAPI {
protected int maxSize;
protected final AtomicInteger size = new AtomicInteger(0);
protected final ConcurrentLinkedQueue queue =
new ConcurrentLinkedQueue<>();
@Override
public void setMaxSize(int bytes) {
this.maxSize = bytes;
}
@Override
public XByteBuffer getBuffer(int minSize, boolean discard) {
XByteBuffer buffer = queue.poll();
if ( buffer != null ) {
size.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;
}
@Override
public void returnBuffer(XByteBuffer buffer) {
if ( (size.get() + buffer.getCapacity()) <= maxSize ) {
size.addAndGet(buffer.getCapacity());
queue.offer(buffer);
}
}
@Override
public void clear() {
queue.clear();
size.set(0);
}
public int getMaxSize() {
return maxSize;
}
}