http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
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package io.undertow.server;


Listener interface for events that are run at the completion of a request/response
cycle (i.e. when the request has been completely read, and the response has been fully written).
At this point it is to late to modify the exchange further.
Completion listeners are invoked in reverse order,

Author:Stuart Douglas
/**
 * Listener interface for events that are run at the completion of a request/response
 * cycle (i.e. when the request has been completely read, and the response has been fully written).
 *
 * At this point it is to late to modify the exchange further.
 *
 * Completion listeners are invoked in reverse order,
 *
 * @author Stuart Douglas
 */
public interface ExchangeCompletionListener {

    void exchangeEvent(final HttpServerExchange exchange, final NextListener nextListener);

    interface NextListener {

        void proceed();

    }
}