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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package jdk.incubator.http;

import java.nio.channels.SelectableChannel;

/**
 * Event handling interface from HttpClientImpl's selector.
 *
 * If BLOCKING is set, then the channel will be put in blocking
 * mode prior to handle() being called. If false, then it remains non-blocking.
 *
 * If REPEATING is set then the event is not cancelled after being posted.
 */
abstract class AsyncEvent {

    public static final int BLOCKING = 0x1; // non blocking if not set
    public static final int REPEATING = 0x2; // one off event if not set

    protected final int flags;

    AsyncEvent(int flags) {
        this.flags = flags;
    }

    /** Returns the channel */
    public abstract SelectableChannel channel();

    /** Returns the selector interest op flags OR'd */
    public abstract int interestOps();

    /** Called when event occurs */
    public abstract void handle();

    /** Called when selector is shutting down. Abort all exchanges. */
    public abstract void abort();

    public boolean blocking() {
        return (flags & BLOCKING) != 0;
    }

    public boolean repeating() {
        return (flags & REPEATING) != 0;
    }
}