com.heliosapm.streams.onramp.TextLineRpcHandler.java Source code

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Here is the source code for com.heliosapm.streams.onramp.TextLineRpcHandler.java

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/*
 * Copyright 2015 the original author or authors.
 *
 * 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.heliosapm.streams.onramp;

import java.nio.charset.Charset;
import java.util.List;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;

/**
 * <p>Title: TextLineRpcHandler</p>
 * <p>Description: </p> 
 * <p>Company: Helios Development Group LLC</p>
 * @author Whitehead (nwhitehead AT heliosdev DOT org)
 * <p><code>com.heliosapm.streams.onramp.TextLineRpcHandler</code></p>
 */

public class TextLineRpcHandler extends MessageToMessageDecoder<ByteBuf> {
    /** The instance logger */
    protected final Logger log = LogManager.getLogger(getClass());

    /** The UTF8 character set */
    public static final Charset UTF8 = Charset.forName("UTF8");

    /** The message forwarder */
    protected MessageForwarder mf = MessageForwarder.getInstance();

    /**
     * {@inheritDoc}
     * @see io.netty.handler.codec.MessageToMessageDecoder#decode(io.netty.channel.ChannelHandlerContext, java.lang.Object, java.util.List)
     */
    @Override
    protected void decode(final ChannelHandlerContext ctx, final ByteBuf buff, final List<Object> out)
            throws Exception {
        final String v = buff.toString(UTF8);
        log.debug("Received Message: [{}]", v);
        mf.send(v);
        out.add(buff.retain());
    }

    /**
     * {@inheritDoc}
     * @see io.netty.channel.ChannelInboundHandlerAdapter#exceptionCaught(io.netty.channel.ChannelHandlerContext, java.lang.Throwable)
     */
    @Override
    public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) throws Exception {
        log.warn("Caught exception: {}", cause);
    }

}