| /* |
| * 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 com.alibaba.dubbo.remoting.transport.grizzly; |
| |
| import com.alibaba.dubbo.common.Constants; |
| import com.alibaba.dubbo.common.URL; |
| import com.alibaba.dubbo.remoting.Channel; |
| import com.alibaba.dubbo.remoting.ChannelHandler; |
| import com.alibaba.dubbo.remoting.Codec2; |
| import com.alibaba.dubbo.remoting.buffer.ChannelBuffer; |
| import com.alibaba.dubbo.remoting.buffer.ChannelBuffers; |
| import com.alibaba.dubbo.remoting.buffer.DynamicChannelBuffer; |
| |
| import org.glassfish.grizzly.Buffer; |
| import org.glassfish.grizzly.Connection; |
| import org.glassfish.grizzly.filterchain.BaseFilter; |
| import org.glassfish.grizzly.filterchain.FilterChainContext; |
| import org.glassfish.grizzly.filterchain.NextAction; |
| |
| import java.io.IOException; |
| |
| /** |
| * GrizzlyCodecAdapter |
| */ |
| public class GrizzlyCodecAdapter extends BaseFilter { |
| |
| private final Codec2 codec; |
| |
| private final URL url; |
| |
| private final ChannelHandler handler; |
| |
| private final int bufferSize; |
| |
| private ChannelBuffer previousData = ChannelBuffers.EMPTY_BUFFER; |
| |
| public GrizzlyCodecAdapter(Codec2 codec, URL url, ChannelHandler handler) { |
| this.codec = codec; |
| this.url = url; |
| this.handler = handler; |
| int b = url.getPositiveParameter(Constants.BUFFER_KEY, Constants.DEFAULT_BUFFER_SIZE); |
| this.bufferSize = b >= Constants.MIN_BUFFER_SIZE && b <= Constants.MAX_BUFFER_SIZE ? b : Constants.DEFAULT_BUFFER_SIZE; |
| } |
| |
| @Override |
| public NextAction handleWrite(FilterChainContext context) throws IOException { |
| Connection<?> connection = context.getConnection(); |
| GrizzlyChannel channel = GrizzlyChannel.getOrAddChannel(connection, url, handler); |
| try { |
| ChannelBuffer channelBuffer = ChannelBuffers.dynamicBuffer(1024); // Do not need to close |
| |
| Object msg = context.getMessage(); |
| codec.encode(channel, channelBuffer, msg); |
| |
| GrizzlyChannel.removeChannelIfDisconnected(connection); |
| Buffer buffer = connection.getTransport().getMemoryManager().allocate(channelBuffer.readableBytes()); |
| buffer.put(channelBuffer.toByteBuffer()); |
| buffer.flip(); |
| buffer.allowBufferDispose(true); |
| context.setMessage(buffer); |
| } finally { |
| GrizzlyChannel.removeChannelIfDisconnected(connection); |
| } |
| return context.getInvokeAction(); |
| } |
| |
| @Override |
| public NextAction handleRead(FilterChainContext context) throws IOException { |
| Object message = context.getMessage(); |
| Connection<?> connection = context.getConnection(); |
| Channel channel = GrizzlyChannel.getOrAddChannel(connection, url, handler); |
| try { |
| if (message instanceof Buffer) { // receive a new packet |
| Buffer grizzlyBuffer = (Buffer) message; // buffer |
| |
| ChannelBuffer frame; |
| |
| if (previousData.readable()) { |
| if (previousData instanceof DynamicChannelBuffer) { |
| previousData.writeBytes(grizzlyBuffer.toByteBuffer()); |
| frame = previousData; |
| } else { |
| int size = previousData.readableBytes() + grizzlyBuffer.remaining(); |
| frame = ChannelBuffers.dynamicBuffer(size > bufferSize ? size : bufferSize); |
| frame.writeBytes(previousData, previousData.readableBytes()); |
| frame.writeBytes(grizzlyBuffer.toByteBuffer()); |
| } |
| } else { |
| frame = ChannelBuffers.wrappedBuffer(grizzlyBuffer.toByteBuffer()); |
| } |
| |
| Object msg; |
| int savedReadIndex; |
| |
| do { |
| savedReadIndex = frame.readerIndex(); |
| try { |
| msg = codec.decode(channel, frame); |
| } catch (Exception e) { |
| previousData = ChannelBuffers.EMPTY_BUFFER; |
| throw new IOException(e.getMessage(), e); |
| } |
| if (msg == Codec2.DecodeResult.NEED_MORE_INPUT) { |
| frame.readerIndex(savedReadIndex); |
| return context.getStopAction(); |
| } else { |
| if (savedReadIndex == frame.readerIndex()) { |
| previousData = ChannelBuffers.EMPTY_BUFFER; |
| throw new IOException("Decode without read data."); |
| } |
| if (msg != null) { |
| context.setMessage(msg); |
| return context.getInvokeAction(); |
| } else { |
| return context.getInvokeAction(); |
| } |
| } |
| } while (frame.readable()); |
| } else { // Other events are passed down directly |
| return context.getInvokeAction(); |
| } |
| } finally { |
| GrizzlyChannel.removeChannelIfDisconnected(connection); |
| } |
| } |
| |
| } |