1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.channel;
17
18 /**
19 * A {@link ChannelEvent} which represents the notification of an exception
20 * raised by a {@link ChannelHandler} or an I/O thread. This event is for
21 * going upstream only. Please refer to the {@link ChannelEvent} documentation
22 * to find out what an upstream event and a downstream event are and what
23 * fundamental differences they have.
24 */
25 public interface ExceptionEvent extends ChannelEvent {
26
27 /**
28 * Returns the raised exception.
29 */
30 Throwable getCause();
31 }