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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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 io.netty.handler.codec.spdy;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandler;
import io.netty.channel.ChannelPromise;
import io.netty.handler.codec.ByteToMessageDecoder;
import io.netty.handler.codec.UnsupportedMessageTypeException;

import java.net.SocketAddress;
import java.util.List;

/**
 * A {@link ChannelHandler} that encodes and decodes SPDY Frames.
 */
public class SpdyFrameCodec extends ByteToMessageDecoder
        implements SpdyFrameDecoderDelegate, ChannelOutboundHandler {

    private static final SpdyProtocolException INVALID_FRAME =
            new SpdyProtocolException("Received invalid frame");

    private final SpdyFrameDecoder spdyFrameDecoder;
    private final SpdyFrameEncoder spdyFrameEncoder;
    private final SpdyHeaderBlockDecoder spdyHeaderBlockDecoder;
    private final SpdyHeaderBlockEncoder spdyHeaderBlockEncoder;

    private SpdyHeadersFrame spdyHeadersFrame;
    private SpdySettingsFrame spdySettingsFrame;

    private ChannelHandlerContext ctx;

    /**
     * Creates a new instance with the specified {@code version} and
     * the default decoder and encoder options
     * ({@code maxChunkSize (8192)}, {@code maxHeaderSize (16384)},
     * {@code compressionLevel (6)}, {@code windowBits (15)},
     * and {@code memLevel (8)}).
     */
    public SpdyFrameCodec(SpdyVersion version) {
        this(version, 8192, 16384, 6, 15, 8);
    }

    /**
     * Creates a new instance with the specified decoder and encoder options.
     */
    public SpdyFrameCodec(
            SpdyVersion version, int maxChunkSize, int maxHeaderSize,
            int compressionLevel, int windowBits, int memLevel) {
        this(version, maxChunkSize,
                SpdyHeaderBlockDecoder.newInstance(version, maxHeaderSize),
                SpdyHeaderBlockEncoder.newInstance(version, compressionLevel, windowBits, memLevel));
    }

    protected SpdyFrameCodec(SpdyVersion version, int maxChunkSize,
            SpdyHeaderBlockDecoder spdyHeaderBlockDecoder, SpdyHeaderBlockEncoder spdyHeaderBlockEncoder) {
        spdyFrameDecoder = new SpdyFrameDecoder(version, this, maxChunkSize);
        spdyFrameEncoder = new SpdyFrameEncoder(version);
        this.spdyHeaderBlockDecoder = spdyHeaderBlockDecoder;
        this.spdyHeaderBlockEncoder = spdyHeaderBlockEncoder;
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        super.handlerAdded(ctx);
        this.ctx = ctx;
        ctx.channel().closeFuture().addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                spdyHeaderBlockDecoder.end();
                spdyHeaderBlockEncoder.end();
            }
        });
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List out) throws Exception {
        spdyFrameDecoder.decode(in);
    }

    @Override
    public void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) throws Exception {
        ctx.bind(localAddress, promise);
    }

    @Override
    public void connect(ChannelHandlerContext ctx, SocketAddress remoteAddress, SocketAddress localAddress,
                        ChannelPromise promise) throws Exception {
        ctx.connect(remoteAddress, localAddress, promise);
    }

    @Override
    public void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.disconnect(promise);
    }

    @Override
    public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.close(promise);
    }

    @Override
    public void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception {
        ctx.deregister(promise);
    }

    @Override
    public void read(ChannelHandlerContext ctx) throws Exception {
        ctx.read();
    }

    @Override
    public void flush(ChannelHandlerContext ctx) throws Exception {
        ctx.flush();
    }

    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        ByteBuf frame;

        if (msg instanceof SpdyDataFrame) {

            SpdyDataFrame spdyDataFrame = (SpdyDataFrame) msg;
            frame = spdyFrameEncoder.encodeDataFrame(
                    ctx.alloc(),
                    spdyDataFrame.streamId(),
                    spdyDataFrame.isLast(),
                    spdyDataFrame.content()
            );
            spdyDataFrame.release();
            ctx.write(frame, promise);

        } else if (msg instanceof SpdySynStreamFrame) {

            SpdySynStreamFrame spdySynStreamFrame = (SpdySynStreamFrame) msg;
            ByteBuf headerBlock = spdyHeaderBlockEncoder.encode(ctx.alloc(), spdySynStreamFrame);
            try {
                frame = spdyFrameEncoder.encodeSynStreamFrame(
                        ctx.alloc(),
                        spdySynStreamFrame.streamId(),
                        spdySynStreamFrame.associatedStreamId(),
                        spdySynStreamFrame.priority(),
                        spdySynStreamFrame.isLast(),
                        spdySynStreamFrame.isUnidirectional(),
                        headerBlock
                );
            } finally {
                headerBlock.release();
            }
            ctx.write(frame, promise);

        } else if (msg instanceof SpdySynReplyFrame) {

            SpdySynReplyFrame spdySynReplyFrame = (SpdySynReplyFrame) msg;
            ByteBuf headerBlock = spdyHeaderBlockEncoder.encode(ctx.alloc(), spdySynReplyFrame);
            try {
                frame = spdyFrameEncoder.encodeSynReplyFrame(
                        ctx.alloc(),
                        spdySynReplyFrame.streamId(),
                        spdySynReplyFrame.isLast(),
                        headerBlock
                );
            } finally {
                headerBlock.release();
            }
            ctx.write(frame, promise);

        } else if (msg instanceof SpdyRstStreamFrame) {

            SpdyRstStreamFrame spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
            frame = spdyFrameEncoder.encodeRstStreamFrame(
                    ctx.alloc(),
                    spdyRstStreamFrame.streamId(),
                    spdyRstStreamFrame.status().code()
            );
            ctx.write(frame, promise);

        } else if (msg instanceof SpdySettingsFrame) {

            SpdySettingsFrame spdySettingsFrame = (SpdySettingsFrame) msg;
            frame = spdyFrameEncoder.encodeSettingsFrame(
                    ctx.alloc(),
                    spdySettingsFrame
            );
            ctx.write(frame, promise);

        } else if (msg instanceof SpdyPingFrame) {

            SpdyPingFrame spdyPingFrame = (SpdyPingFrame) msg;
            frame = spdyFrameEncoder.encodePingFrame(
                    ctx.alloc(),
                    spdyPingFrame.id()
            );
            ctx.write(frame, promise);

        } else if (msg instanceof SpdyGoAwayFrame) {

            SpdyGoAwayFrame spdyGoAwayFrame = (SpdyGoAwayFrame) msg;
            frame = spdyFrameEncoder.encodeGoAwayFrame(
                    ctx.alloc(),
                    spdyGoAwayFrame.lastGoodStreamId(),
                    spdyGoAwayFrame.status().code()
            );
            ctx.write(frame, promise);

        } else if (msg instanceof SpdyHeadersFrame) {

            SpdyHeadersFrame spdyHeadersFrame = (SpdyHeadersFrame) msg;
            ByteBuf headerBlock = spdyHeaderBlockEncoder.encode(ctx.alloc(), spdyHeadersFrame);
            try {
                frame = spdyFrameEncoder.encodeHeadersFrame(
                        ctx.alloc(),
                        spdyHeadersFrame.streamId(),
                        spdyHeadersFrame.isLast(),
                        headerBlock
                );
            } finally {
                headerBlock.release();
            }
            ctx.write(frame, promise);

        } else if (msg instanceof SpdyWindowUpdateFrame) {

            SpdyWindowUpdateFrame spdyWindowUpdateFrame = (SpdyWindowUpdateFrame) msg;
            frame = spdyFrameEncoder.encodeWindowUpdateFrame(
                    ctx.alloc(),
                    spdyWindowUpdateFrame.streamId(),
                    spdyWindowUpdateFrame.deltaWindowSize()
            );
            ctx.write(frame, promise);
        } else {
            throw new UnsupportedMessageTypeException(msg);
        }
    }

    @Override
    public void readDataFrame(int streamId, boolean last, ByteBuf data) {
        SpdyDataFrame spdyDataFrame = new DefaultSpdyDataFrame(streamId, data);
        spdyDataFrame.setLast(last);
        ctx.fireChannelRead(spdyDataFrame);
    }

    @Override
    public void readSynStreamFrame(
            int streamId, int associatedToStreamId, byte priority, boolean last, boolean unidirectional) {
        SpdySynStreamFrame spdySynStreamFrame = new DefaultSpdySynStreamFrame(streamId, associatedToStreamId, priority);
        spdySynStreamFrame.setLast(last);
        spdySynStreamFrame.setUnidirectional(unidirectional);
        spdyHeadersFrame = spdySynStreamFrame;
    }

    @Override
    public void readSynReplyFrame(int streamId, boolean last) {
        SpdySynReplyFrame spdySynReplyFrame = new DefaultSpdySynReplyFrame(streamId);
        spdySynReplyFrame.setLast(last);
        spdyHeadersFrame = spdySynReplyFrame;
    }

    @Override
    public void readRstStreamFrame(int streamId, int statusCode) {
        SpdyRstStreamFrame spdyRstStreamFrame = new DefaultSpdyRstStreamFrame(streamId, statusCode);
        ctx.fireChannelRead(spdyRstStreamFrame);
    }

    @Override
    public void readSettingsFrame(boolean clearPersisted) {
        spdySettingsFrame = new DefaultSpdySettingsFrame();
        spdySettingsFrame.setClearPreviouslyPersistedSettings(clearPersisted);
    }

    @Override
    public void readSetting(int id, int value, boolean persistValue, boolean persisted) {
        spdySettingsFrame.setValue(id, value, persistValue, persisted);
    }

    @Override
    public void readSettingsEnd() {
        Object frame = spdySettingsFrame;
        spdySettingsFrame = null;
        ctx.fireChannelRead(frame);
    }

    @Override
    public void readPingFrame(int id) {
        SpdyPingFrame spdyPingFrame = new DefaultSpdyPingFrame(id);
        ctx.fireChannelRead(spdyPingFrame);
    }

    @Override
    public void readGoAwayFrame(int lastGoodStreamId, int statusCode) {
        SpdyGoAwayFrame spdyGoAwayFrame = new DefaultSpdyGoAwayFrame(lastGoodStreamId, statusCode);
        ctx.fireChannelRead(spdyGoAwayFrame);
    }

    @Override
    public void readHeadersFrame(int streamId, boolean last) {
        spdyHeadersFrame = new DefaultSpdyHeadersFrame(streamId);
        spdyHeadersFrame.setLast(last);
    }

    @Override
    public void readWindowUpdateFrame(int streamId, int deltaWindowSize) {
        SpdyWindowUpdateFrame spdyWindowUpdateFrame = new DefaultSpdyWindowUpdateFrame(streamId, deltaWindowSize);
        ctx.fireChannelRead(spdyWindowUpdateFrame);
    }

    @Override
    public void readHeaderBlock(ByteBuf headerBlock) {
        try {
            spdyHeaderBlockDecoder.decode(ctx.alloc(), headerBlock, spdyHeadersFrame);
        } catch (Exception e) {
            ctx.fireExceptionCaught(e);
        } finally {
            headerBlock.release();
        }
    }

    @Override
    public void readHeaderBlockEnd() {
        Object frame = null;
        try {
            spdyHeaderBlockDecoder.endHeaderBlock(spdyHeadersFrame);
            frame = spdyHeadersFrame;
            spdyHeadersFrame = null;
        } catch (Exception e) {
            ctx.fireExceptionCaught(e);
        }
        if (frame != null) {
            ctx.fireChannelRead(frame);
        }
    }

    @Override
    public void readFrameError(String message) {
        ctx.fireExceptionCaught(INVALID_FRAME);
    }
}
 















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