| /** |
| * 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.kerby.transport.tcp; |
| |
| import org.apache.kerby.transport.Transport; |
| import org.apache.kerby.transport.buffer.BufferPool; |
| import org.apache.kerby.transport.buffer.RecvBuffer; |
| import org.apache.kerby.transport.event.MessageEvent; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.SocketChannel; |
| |
| public class TcpTransport extends Transport { |
| |
| private SocketChannel channel; |
| |
| private StreamingDecoder streamingDecoder; |
| |
| private RecvBuffer recvBuffer; |
| |
| public TcpTransport(SocketChannel channel, |
| StreamingDecoder streamingDecoder) throws IOException { |
| super((InetSocketAddress) channel.getRemoteAddress()); |
| this.channel = channel; |
| this.streamingDecoder = streamingDecoder; |
| |
| this.recvBuffer = new RecvBuffer(); |
| } |
| |
| @Override |
| protected void sendOutMessage(ByteBuffer message) throws IOException { |
| channel.write(message); |
| } |
| |
| public void onReadable() throws IOException { |
| ByteBuffer writeBuffer = BufferPool.allocate(65536); |
| if (channel.read(writeBuffer) <= 0) { |
| BufferPool.release(writeBuffer); |
| return; |
| } |
| |
| writeBuffer.flip(); |
| recvBuffer.write(writeBuffer); |
| |
| WithReadDataHander rdHandler = new WithReadDataHander(); |
| rdHandler.handle(); |
| } |
| |
| class WithReadDataHander implements DecodingCallback { |
| private ByteBuffer streamingBuffer; |
| |
| @Override |
| public void onMessageComplete(int messageLength, int adjustOffset) { |
| ByteBuffer message = null; |
| |
| int remaining = streamingBuffer.remaining(); |
| if (remaining == messageLength) { |
| message = streamingBuffer; |
| } else if (remaining > messageLength) { |
| message = streamingBuffer.duplicate(); |
| int newLimit = streamingBuffer.position() + messageLength; |
| message.limit(newLimit); |
| |
| streamingBuffer.position(newLimit); |
| recvBuffer.writeFirst(streamingBuffer); |
| } |
| |
| if (message != null) { |
| if (adjustOffset > 0) { |
| message.position(message.position() + adjustOffset); |
| } |
| dispatcher.dispatch(MessageEvent.createInboundMessageEvent( |
| TcpTransport.this, message)); |
| } |
| } |
| |
| @Override |
| public void onMoreDataNeeded() { |
| recvBuffer.writeFirst(streamingBuffer); |
| } |
| |
| @Override |
| public void onMoreDataNeeded(int needDataLength) { |
| recvBuffer.writeFirst(streamingBuffer); |
| } |
| |
| public void handle() { |
| if (recvBuffer.isEmpty()) { |
| return; |
| } |
| |
| streamingBuffer = recvBuffer.readMostBytes(); |
| |
| streamingDecoder.decode(streamingBuffer.duplicate(), this); |
| } |
| } |
| } |