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Java > Open Source Codes > org > apache > excalibur > event > command > CommandFailureHandler


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
12  * implied.
13  *
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 package org.apache.excalibur.event.command;
19
20 /**
21  * CommandFailureHandler is used by the CommandManager to handle any exceptions that might
22  * be thrown by a Command. That way the application using the CommandManager can properly
23  * manage what happens when an exception is thrown.
24  *
25  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
26  * @version CVS Revision: 1.1 $
27  */
28 public interface CommandFailureHandler
29 {
30     /**
31      * Handle a command failure. If a command throws an exception, it has failed. The
32      * CommandManager will call this method so that we can handle the problem effectively.
33      *
34      * @param command The original Command object that failed
35      * @param throwable The throwable that caused the failure
36      * @return <code>true</code> if the CommandManager should cease to process commands.
37      */
38     boolean handleCommandFailure(final Command command, final Throwable JavaDoc throwable);
39 }
40
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