ExceptionHandler.java

package io.scalecube.transport;

import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;

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

/**
 * Catching and logging exceptions.
 * <p/>
 * <b>NOTE:</b> this handler must be the last handler in the pipeline.
 */
@ChannelHandler.Sharable
final class ExceptionHandler extends ChannelDuplexHandler {

  private static final Logger LOGGER = LoggerFactory.getLogger(ExceptionHandler.class);

  @Override
  public final void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
    if (cause instanceof NetworkEmulatorException) {
      LOGGER.debug("Network emulator fire exception for channel {}: {}", ctx.channel(), cause.getMessage());
    } else {
      LOGGER.warn("Exception caught for channel {}, {}", ctx.channel(), cause.getMessage(), cause);
    }
  }

}