org.graylog2.inputs.transports.netty.PromiseFailureHandler Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog 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.
*
* Graylog 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 Graylog. If not, see .
*/
package org.graylog2.inputs.transports.netty;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Singleton;
@Singleton
@ChannelHandler.Sharable
public class PromiseFailureHandler extends ChannelOutboundHandlerAdapter {
public static final PromiseFailureHandler INSTANCE = new PromiseFailureHandler();
private static final Logger LOG = LoggerFactory.getLogger(PromiseFailureHandler.class);
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
promise.addListener(Listener.INSTANCE);
super.write(ctx, msg, promise);
}
private static final class Listener implements ChannelFutureListener {
private static final Listener INSTANCE = new Listener();
@Override
public void operationComplete(ChannelFuture future) throws Exception {
if (!future.isSuccess()) {
LOG.info("Write on channel {} failed", future.channel(), future.cause());
}
}
}
}