com.generallycloud.baseio.component.TransparentByteBufReader Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2015-2017 GenerallyCloud.com
 *  
 * 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 com.generallycloud.baseio.component;

import java.io.IOException;

import com.generallycloud.baseio.buffer.ByteBuf;
import com.generallycloud.baseio.common.CloseUtil;
import com.generallycloud.baseio.common.ReleaseUtil;
import com.generallycloud.baseio.protocol.ChannelReadFuture;
import com.generallycloud.baseio.protocol.ProtocolDecoder;

public class TransparentByteBufReader extends LinkableChannelByteBufReader {
	
	private ForeReadFutureAcceptor foreReadFutureAcceptor;
	
	public TransparentByteBufReader(SocketChannelContext context) {
		this.foreReadFutureAcceptor = context.getForeReadFutureAcceptor();
	}

	@Override
	public void accept(SocketChannel channel, ByteBuf buf) throws Exception {

		UnsafeSocketSession session = channel.getSession();

		for (;;) {

			if (!buf.hasRemaining()) {
				return;
			}

			ChannelReadFuture future = channel.getReadFuture();

			if (future == null) {

				ProtocolDecoder decoder = channel.getProtocolDecoder();

				future = decoder.decode(session, buf);

				if (future == null) {
					CloseUtil.close(channel);
					return;
				}

				channel.setReadFuture(future);
			}

			try {

				if (!future.read(session, buf)) {

					return;
				}

				ReleaseUtil.release(future);

			} catch (Throwable e) {

				ReleaseUtil.release(future);

				if (e instanceof IOException) {
					throw (IOException) e;
				}

				throw new IOException("exception occurred when read from channel,the nested exception is,"
						+ e.getMessage(), e);
			}

			channel.setReadFuture(null);

			foreReadFutureAcceptor.accept(session, future);
		}
	}
}