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/*
* Copyright 2007-2008 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 javax.management.event;
import javax.management.remote.NotificationResult;
/**
* An object implementing this interface is passed by an {@link EventClient}
* to its {@link EventRelay}, to allow the {@code EventRelay} to communicate
* received notifications to the {@code EventClient}.
*
* @see <a href="package-summary.html#transports">Custom notification
* transports</a>
*/
public interface EventReceiver {
/**
* This method is implemented by {@code EventClient} as a callback to
* receive notifications from {@code EventRelay}.
* <P>The notifications are included in an object specified by the class
* {@link NotificationResult}. In
* addition to a set of notifications, the class object also contains two values:
* {@code earliestSequenceNumber} and {@code nextSequenceNumber}.
* These two values determine whether any notifications have been lost.
* The {@code nextSequenceNumber} value of the last time is compared
* to the received value {@code earliestSequenceNumber}. If the
* received {@code earliesSequenceNumber} is greater, than the difference
* signifies the number of lost notifications. A sender should
* ensure the sequence of notifications sent, meaning that the value
* {@code earliestSequenceNumber} of the next return should be always equal to
* or greater than the value {@code nextSequenceNumber} of the last return.
*
* @param nr the received notifications and sequence numbers.
*/
public void receive(NotificationResult nr);
/**
* Allows the {@link EventRelay} to report when it receives an unexpected
* exception, which may be fatal and which may make it stop receiving
* notifications.
*
* @param t The unexpected exception received while {@link EventRelay} was running.
*/
public void failed(Throwable t);
/**
* Allows the {@link EventRelay} to report when it receives an unexpected
* exception that is not fatal. For example, a notification received is not
* serializable or its class is not found.
*
* @param e The unexpected exception received while notifications are being received.
*/
public void nonFatal(Exception e);
}
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