01: /*
02: * Copyright 2004, 2005, 2006 Odysseus Software GmbH
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package de.odysseus.calyxo.control;
17:
18: import javax.servlet.http.HttpServletRequest;
19: import javax.servlet.http.HttpServletResponse;
20:
21: import de.odysseus.calyxo.control.conf.DispatchConfig;
22:
23: /**
24: * Command interface.
25: * <p/>
26: * Application developers should not need to directly implement this interface.
27: *
28: * @author Christoph Beck
29: */
30: public interface Command {
31:
32: /**
33: * Process the specified HTTP request.
34: * @param request the request we are processing
35: * @param response the response we are creating
36: * @return a {@link DispatchConfig} instance describing where and how
37: * control should be forwarded/included, or <code>null</code> if the
38: * response has already been completed.
39: * @exception Exception if the application business logic throws
40: * an exception
41: */
42: public DispatchConfig execute(HttpServletRequest request,
43: HttpServletResponse response) throws Exception;
44: }
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