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/*
* Copyright (c) 2015 Uber Technologies, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.uber.tchannel.codecs;
import com.uber.tchannel.api.errors.TChannelError;
import com.uber.tchannel.frames.CallFrame;
import com.uber.tchannel.frames.CallRequestFrame;
import com.uber.tchannel.frames.CallResponseFrame;
import com.uber.tchannel.frames.ErrorFrame;
import com.uber.tchannel.frames.Frame;
import com.uber.tchannel.frames.FrameType;
import com.uber.tchannel.headers.ArgScheme;
import com.uber.tchannel.headers.TransportHeaders;
import com.uber.tchannel.messages.ErrorResponse;
import com.uber.tchannel.messages.Request;
import com.uber.tchannel.messages.Response;
import com.uber.tchannel.messages.TChannelMessage;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import java.util.ArrayList;
import java.util.List;
public final class MessageCodec {
public static ChannelFuture write(ChannelHandlerContext ctx, Frame frame) {
ChannelFuture f = ctx.writeAndFlush(
encode(
ctx.alloc(),
encode(
ctx.alloc(), frame
)
)
);
f.addListener(ChannelFutureListener.FIRE_EXCEPTION_ON_FAILURE);
return f;
}
public static ByteBuf encode(TFrame tFrame) {
return TFrameCodec.encode(PooledByteBufAllocator.DEFAULT, tFrame);
}
public static ByteBuf encode(ByteBufAllocator allocator, TFrame tFrame) {
return TFrameCodec.encode(allocator, tFrame);
}
public static TFrame decode(ByteBuf buffer) {
return TFrameCodec.decode(buffer);
}
public static TFrame encode(Frame msg) {
return encode(PooledByteBufAllocator.DEFAULT, msg);
}
public static TFrame encode(ByteBufAllocator allocator, Frame msg) {
ByteBuf buffer = null;
if (msg instanceof CallFrame) {
buffer = ((CallFrame)msg).getPayload();
} else {
buffer = msg.encodeHeader(allocator);
}
TFrame frame = new TFrame(buffer.writerIndex(), msg.getType(), msg.getId(), buffer);
return frame;
}
public static Frame decode(TFrame tFrame) throws TChannelError {
Frame frame = Frame.create(tFrame);
frame.decode(tFrame);
return frame;
}
public static TChannelMessage decodeCallFrames(List frames) {
if (frames.isEmpty()) {
return null;
}
CallFrame first = frames.get(0);
if (first.getType() == FrameType.CallRequest) {
return decodeCallRequest(frames);
} else {
return decodeCallResponse(frames);
}
}
public static ErrorResponse decodeErrorResponse(ErrorFrame frame) {
return new ErrorResponse(
frame.getId(),
frame.getErrorType(),
frame.getMessage()
);
}
public static Request decodeCallRequest(List frames) {
if (frames.isEmpty()) {
return null;
}
CallRequestFrame first = (CallRequestFrame) frames.get(0);
ArgScheme scheme = ArgScheme.toScheme(
first.getHeaders().get(TransportHeaders.ARG_SCHEME_KEY));
if (!ArgScheme.isSupported(scheme)) {
return null;
}
List args = new ArrayList<>();
for (CallFrame frame : frames) {
CodecUtils.readArgs(args, frame.getPayload());
frame.release();
}
if (args.size() != 3) {
for (ByteBuf arg : args) {
arg.release();
}
throw new UnsupportedOperationException("The arg count is not should be 3 instead of " + args.size());
}
return Request.build(
scheme,
first.getId(),
first.getTTL(),
first.getService(),
first.getHeaders(),
args.get(0),
args.get(1),
args.get(2));
}
public static Response decodeCallResponse(List frames) {
if (frames.isEmpty()) {
return null;
}
CallResponseFrame first = (CallResponseFrame) frames.get(0);
ArgScheme scheme = ArgScheme.toScheme(
first.getHeaders().get(TransportHeaders.ARG_SCHEME_KEY));
if (!ArgScheme.isSupported(scheme)) {
return null;
}
List args = new ArrayList<>();
for (CallFrame frame : frames) {
CodecUtils.readArgs(args, frame.getPayload());
frame.release();
}
if (args.size() != 3) {
for (ByteBuf arg : args) {
arg.release();
}
throw new UnsupportedOperationException("The arg count is not should be 3 instead of " + args.size());
}
args.get(0).release();
return Response.build(
scheme,
first.getId(),
first.getResponseCode(),
first.getHeaders(),
args.get(1),
args.get(2));
}
}
