| /* |
| * |
| * 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.qpid.tests.protocol; |
| |
| import java.nio.ByteBuffer; |
| import java.util.LinkedList; |
| import java.util.Queue; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.ChannelOutboundHandlerAdapter; |
| import io.netty.channel.ChannelPromise; |
| |
| public class OutputHandler extends ChannelOutboundHandlerAdapter |
| { |
| private final OutputEncoder _outputEncoder; |
| private Queue<ByteBufferPromisePair> _cachedEncodedFramePromisePairs; |
| private int _encodedSize; |
| |
| OutputHandler(final OutputEncoder outputEncoder) |
| { |
| _outputEncoder = outputEncoder; |
| _cachedEncodedFramePromisePairs = new LinkedList<>(); |
| _encodedSize = 0; |
| } |
| |
| @Override |
| public void write(final ChannelHandlerContext ctx, final Object msg, final ChannelPromise promise) throws Exception |
| { |
| ByteBuffer byteBuffer = _outputEncoder.encode(msg); |
| if (byteBuffer != null) |
| { |
| send(ctx, byteBuffer, promise); |
| } |
| else if (msg instanceof ByteBuf) |
| { |
| ByteBuf buf = (ByteBuf) msg; |
| final ByteBuffer bytes = ByteBuffer.allocate(buf.readableBytes()); |
| buf.readBytes(bytes.array()); |
| buf.release(); |
| |
| send(ctx, bytes, promise); |
| } |
| else |
| { |
| super.write(ctx, msg, promise); |
| } |
| } |
| |
| private synchronized void send(ChannelHandlerContext ctx, final ByteBuffer dataByteBuffer, final ChannelPromise promise) |
| { |
| _cachedEncodedFramePromisePairs.add(new ByteBufferPromisePair(dataByteBuffer, promise)); |
| _encodedSize += dataByteBuffer.remaining(); |
| } |
| |
| |
| @Override |
| public synchronized void flush(final ChannelHandlerContext ctx) throws Exception |
| { |
| final ChannelPromise promise = ctx.channel().newPromise(); |
| byte[] data = new byte[_encodedSize]; |
| |
| int offset = 0; |
| while(offset < _encodedSize) |
| { |
| ByteBufferPromisePair currentPair = _cachedEncodedFramePromisePairs.poll(); |
| int remaining = currentPair.byteBuffer.remaining(); |
| currentPair.byteBuffer.get(data, offset, remaining) ; |
| offset += remaining; |
| |
| promise.addListener(future -> { |
| if (future.isSuccess()) |
| { |
| currentPair.channelPromise.setSuccess(); |
| } |
| else |
| { |
| currentPair.channelPromise.setFailure(future.cause()); |
| } |
| }); |
| } |
| |
| _encodedSize = 0; |
| |
| ByteBuf buffer = ByteBufAllocator.DEFAULT.buffer(); |
| buffer.writeBytes(data); |
| |
| try |
| { |
| OutputHandler.super.write(ctx, buffer, promise); |
| } |
| catch (Exception e) |
| { |
| promise.setFailure(e); |
| } |
| |
| super.flush(ctx); |
| } |
| |
| class ByteBufferPromisePair |
| { |
| private ByteBuffer byteBuffer; |
| private ChannelPromise channelPromise; |
| |
| ByteBufferPromisePair(final ByteBuffer byteBuffer, final ChannelPromise channelPromise) |
| { |
| this.byteBuffer = byteBuffer; |
| this.channelPromise = channelPromise; |
| } |
| } |
| |
| } |