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    1   /*
    2    * Copyright 2009 Red Hat, Inc.
    3    *
    4    * Red Hat licenses this file to you under the Apache License, version 2.0
    5    * (the "License"); you may not use this file except in compliance with the
    6    * 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   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
    26   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
    27   *
    28   * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
    29   */
    30  public interface ExceptionEvent extends ChannelEvent {
    31
    32      /**
    33       * Returns the raised exception.
    34       */
    35      Throwable getCause();
    36  }