Java tutorial
/* * Copyright (c) 2010-2012 Sonatype, Inc. All rights reserved. * * This program is licensed to you under the Apache License Version 2.0, * and you may not use this file except in compliance with the Apache License Version 2.0. * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0. * * Unless required by applicable law or agreed to in writing, * software distributed under the Apache License Version 2.0 is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under. */ package org.asynchttpclient.providers.netty.request; import io.netty.channel.FileRegion; import io.netty.util.AbstractReferenceCounted; import java.io.IOException; import java.nio.channels.WritableByteChannel; import org.asynchttpclient.RandomAccessBody; /** * Adapts a {@link RandomAccessBody} to Netty's {@link FileRegion}. */ class BodyFileRegion extends AbstractReferenceCounted implements FileRegion { private final RandomAccessBody body; private long transfered; public BodyFileRegion(RandomAccessBody body) { if (body == null) { throw new IllegalArgumentException("no body specified"); } this.body = body; } @Override public long position() { return 0; } @Override public long count() { return body.getContentLength(); } @Override public long transfered() { return transfered; } @Override public long transferTo(WritableByteChannel target, long position) throws IOException { long written = body.transferTo(position, Long.MAX_VALUE, target); if (written > 0) { transfered += written; } return written; } @Override protected void deallocate() { try { body.close(); } catch (IOException e) { // we tried } } }