/*
* Copyright 2012 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 com.facebook.presto.jdbc.internal.netty.handler.codec.socks;
import com.facebook.presto.jdbc.internal.netty.buffer.ChannelBuffer;
import com.facebook.presto.jdbc.internal.netty.buffer.ChannelBuffers;
import com.facebook.presto.jdbc.internal.netty.channel.Channel;
import com.facebook.presto.jdbc.internal.netty.channel.ChannelHandler;
import com.facebook.presto.jdbc.internal.netty.channel.ChannelHandlerContext;
import com.facebook.presto.jdbc.internal.netty.handler.codec.oneone.OneToOneEncoder;
/**
* Encodes an {@link SocksMessage} into a {@link ChannelBuffer}.
* {@link OneToOneEncoder} implementation.
* Use this with {@link SocksInitRequest}, {@link SocksInitResponse}, {@link SocksAuthRequest},
* {@link SocksAuthResponse}, {@link SocksCmdRequest} and {@link SocksCmdResponse}
*/
@ChannelHandler.Sharable
public class SocksMessageEncoder extends OneToOneEncoder {
private static final String name = "SOCKS_MESSAGE_ENCODER";
private static final int DEFAULT_ENCODER_BUFFER_SIZE = 1024;
public static String getName() {
return name;
}
@Override
protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
ChannelBuffer buffer = null;
if (msg instanceof SocksMessage) {
buffer = ChannelBuffers.buffer(DEFAULT_ENCODER_BUFFER_SIZE);
((SocksMessage) msg).encodeAsByteBuf(buffer);
}
return buffer;
}
}