private void incrementCurrentRequestsInFlight(ChannelHandlerContext ctx) {
        currentRequestsGauge.set(currentRequests.incrementAndGet());
        ctx.channel().attr(ATTR_REQ_INFLIGHT).set(INFLIGHT);
    }
User: michaels@netflix.com
Date: 4/14/16
Time: 3:51 PM
zuul-core/src/main/java/com/netflix/netty/common/metrics/HttpMetricsChannelHandler.java