org.anhonesteffort.chnlbrkr.stream.ChannelStreamer.java Source code

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Here is the source code for org.anhonesteffort.chnlbrkr.stream.ChannelStreamer.java

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/*
 * Copyright (C) 2015 An Honest Effort LLC, coping.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.anhonesteffort.chnlbrkr.stream;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import org.anhonesteffort.chnlzr.CapnpUtil;
import org.anhonesteffort.chnlzr.WriteQueuingContext;
import org.capnproto.MessageBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.anhonesteffort.chnlzr.Proto.BaseMessage;
import static org.anhonesteffort.chnlzr.Proto.Error;

public class ChannelStreamer extends ChannelHandlerAdapter {

    private static final Logger log = LoggerFactory.getLogger(ChannelStreamer.class);
    private final WriteQueuingContext client;
    private final String chnlzrId;

    protected ChannelStreamer(ChannelHandlerContext chnlzr, WriteQueuingContext client, MessageBuilder capabilities,
            MessageBuilder channelState, String chnlzrId) {
        this.client = client;
        this.chnlzrId = chnlzrId;

        client.getCloseFuture().addListener(close -> chnlzr.close());
        chnlzr.channel().closeFuture().addListener(close -> client.close());

        client.writeOrQueue(capabilities);
        client.writeOrQueue(channelState);
    }

    @Override
    public void channelRead(ChannelHandlerContext chnlzr, Object msg) {
        BaseMessage.Reader message = (BaseMessage.Reader) msg;

        switch (message.getType()) {
        case CHANNEL_STATE:
        case SAMPLES:
        case ERROR:
            client.writeOrQueue(CapnpUtil.builder(message));
            break;

        default:
            log.warn(chnlzrId + " chnlzr sent unexpected " + message.getType().name());
            client.writeAndClose(CapnpUtil.error(Error.ERROR_UNKNOWN));
            chnlzr.close();
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext chnlzr, Throwable cause) {
        log.error(chnlzrId + " caught unexpected exception", cause);
        client.writeAndClose(CapnpUtil.error(Error.ERROR_UNKNOWN));
        chnlzr.close();
    }

}