OzymandiasClientHandler.java

package at.ac.ait.archistar.engine.serverinterface;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import at.archistar.bft.messages.ClientCommand;
import at.archistar.bft.messages.TransactionResult;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

/**
 * Listener for incoming replica messages. Currently only a transaction's result
 * is transmitted.
 * 
 * Note: I wanted to integrate this into OzymandiasClient but failed due to threading
 *
 * @author andy
 */
public class OzymandiasClientHandler extends SimpleChannelInboundHandler<ClientCommand> {

    private Logger logger = LoggerFactory.getLogger(OzymandiasClientHandler.class);

    private final OzymandiasClient ozymandiasClient;

    public OzymandiasClientHandler(OzymandiasClient ozymandiasClient) {
        this.ozymandiasClient = ozymandiasClient;
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.warn("Unexpected exception from downstream.", cause);
        ctx.close();
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, ClientCommand msg) throws Exception {
        logger.debug("received: {}", msg);
        if (msg instanceof TransactionResult) {
            this.ozymandiasClient.addReplicaResult(msg.getClientId(), msg.getClientSequence(), (TransactionResult) msg);
        } else {
            logger.warn("unknown command: {}", msg);
        }
    }
}