poke.debug.DebugFrameDecoder.java Source code

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Here is the source code for poke.debug.DebugFrameDecoder.java

Source

/*
 * copyright 2012, gash
 * 
 * Gash 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 poke.debug;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;

public class DebugFrameDecoder extends LengthFieldBasedFrameDecoder {
    public DebugFrameDecoder(int maxFrameLength, int lengthFieldOffset, int lengthFieldLength, int lengthAdjustment,
            int initialBytesToStrip) {
        super(maxFrameLength, lengthFieldOffset, lengthFieldLength, lengthAdjustment, initialBytesToStrip);
    }

    @Override
    protected Object decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {

        Object rtn = null;
        try {
            rtn = super.decode(ctx, in);

            System.err.println("----------------------------");
            int readerIndex = in.readerIndex();
            System.err.println("reader index: " + readerIndex);
            if (rtn != null) {
                byte[] arr = ((ByteBuf) rtn).array();
                if (arr != null) {
                    for (byte b : arr)
                        System.err.println(b);
                } else
                    System.err.println("buffer is empty");
            }
            System.err.println("----------------------------");
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return rtn;
    }
}