com.facebook.nifty.core.NettyThriftDecoder.java Source code

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Here is the source code for com.facebook.nifty.core.NettyThriftDecoder.java

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/*
 * Copyright (C) 2012-2013 Facebook, Inc.
 *
 * Licensed 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.facebook.nifty.core;

import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

import org.apache.thrift.transport.TTransport;

/**
 * Converts ByteBuf into TNiftyTransport.
 */
public class NettyThriftDecoder extends ByteToMessageDecoder {

    protected TTransport getTransport(Channel channel, ByteBuf cb) {
        ThriftTransportType type = (cb.getUnsignedByte(0) < 0x80) ? ThriftTransportType.FRAMED
                : ThriftTransportType.UNFRAMED;
        if (type == ThriftTransportType.FRAMED) {
            cb.skipBytes(4);
        }
        return new TNiftyTransport(channel, new ThriftMessage(cb, type));
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        out.add(getTransport(ctx.channel(), in));
    }

}