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


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 package org.apache.excalibur.event.command;
18
19 import org.apache.avalon.framework.activity.Executable;
20 import org.apache.excalibur.event.Signal;
21
22 /**
23  * A Command is a specific type of Signal that denotes an asynchronous
24  * execution unit that must be performed by the CommandManager.
25  *
26  * <p>
27  * The interface design is heavily influenced by
28  * <a HREF="mailto:mdw@cs.berkeley.edu">Matt Welsh</a>'s SandStorm server,
29  * his demonstration of the SEDA architecture. We have deviated where we
30  * felt the design differences where better.
31  * </p>
32  *
33  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
34  */
35 public interface Command extends Signal, Executable
36 {
37 }
38
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