src/jdk.httpserver/share/classes/sun/net/httpserver/Event.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package sun.net.httpserver;

import java.util.Objects;

abstract sealed class Event {

    final ExchangeImpl exchange;

    protected Event(ExchangeImpl t) {
        this.exchange = t;
    }

    /**
     * Stopping event for the http server.
     * The event applies to the whole server and is not tied to any particular
     * exchange.
     */
    static final class StopRequested extends Event {
        StopRequested() {
            super(null);
        }
    }

    /**
     * Event indicating that writing is finished for a given exchange.
     */
    static final class WriteFinished extends Event {
        WriteFinished(ExchangeImpl t) {
            super(Objects.requireNonNull(t));
            assert !t.writefinished;
            t.writefinished = true;
        }
    }
}