/*

 * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.

 * 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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 */

package java.nio.channels;

import java.io.IOException;

/**

 * A channel that can be asynchronously closed and interrupted.

 *

 * <p> A channel that implements this interface is <i>asynchronously

 * closeable:</i> If a thread is blocked in an I/O operation on an

 * interruptible channel then another thread may invoke the channel's {@link

 * #close close} method.  This will cause the blocked thread to receive an

 * {@link AsynchronousCloseException}.

 *

 * <p> A channel that implements this interface is also <i>interruptible:</i>

 * If a thread is blocked in an I/O operation on an interruptible channel then

 * another thread may invoke the blocked thread's {@link Thread#interrupt()

 * interrupt} method.  This will cause the channel to be closed, the blocked

 * thread to receive a {@link ClosedByInterruptException}, and the blocked

 * thread's interrupt status to be set.

 *

 * <p> If a thread's interrupt status is already set and it invokes a blocking

 * I/O operation upon a channel then the channel will be closed and the thread

 * will immediately receive a {@link ClosedByInterruptException}; its interrupt

 * status will remain set.

 *

 * <p> A channel supports asynchronous closing and interruption if, and only

 * if, it implements this interface.  This can be tested at runtime, if

 * necessary, via the <tt>instanceof</tt> operator.

 *

 *

 * @author Mark Reinhold

 * @author JSR-51 Expert Group

 * @since 1.4

 */

public interface InterruptibleChannel

    extends Channel

{

    /**

     * Closes this channel.

     *

     * <p> Any thread currently blocked in an I/O operation upon this channel

     * will receive an {@link AsynchronousCloseException}.

     *

     * <p> This method otherwise behaves exactly as specified by the {@link

     * Channel#close Channel} interface.  </p>

     *

     * @throws  IOException  If an I/O error occurs

     */

    public void close() throws IOException;

}