1 package org.apache.turbine.pipeline;
2
3
4 /*
5 * Licensed to the Apache Software Foundation (ASF) under one
6 * or more contributor license agreements. See the NOTICE file
7 * distributed with this work for additional information
8 * regarding copyright ownership. The ASF licenses this file
9 * to you under the Apache License, Version 2.0 (the
10 * "License"); you may not use this file except in compliance
11 * with the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing,
16 * software distributed under the License is distributed on an
17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 * KIND, either express or implied. See the License for the
19 * specific language governing permissions and limitations
20 * under the License.
21 */
22
23
24 import java.io.IOException;
25
26 import org.apache.logging.log4j.LogManager;
27 import org.apache.logging.log4j.Logger;
28 import org.apache.turbine.util.RunData;
29 import org.apache.turbine.util.TurbineException;
30 import org.apache.turbine.util.uri.URIConstants;
31
32 /**
33 * This valve is responsible for setting the 'action' property of RunData based
34 * on request parameter. There is no default action, since a null action is
35 * perfectly valid.
36 *
37 * @author <a href="mailto:james@jamestaylor.org">James Taylor</a>
38 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
39 */
40 public class DetermineActionValve
41 implements Valve
42 {
43 private static final Logger log
44 = LogManager.getLogger(DetermineActionValve.class);
45
46 /**
47 * @see org.apache.turbine.pipeline.Valve#invoke(PipelineData, ValveContext)
48 */
49 @Override
50 public void invoke(PipelineData pipelineData, ValveContext context)
51 throws IOException, TurbineException
52 {
53 RunData data = pipelineData.getRunData();
54 if (!data.hasAction())
55 {
56 String action =
57 data.getParameters().getString(URIConstants.CGI_ACTION_PARAM);
58
59 if (action != null)
60 {
61 data.setAction(action);
62 log.debug("Set action from request parameter");
63 }
64 else
65 {
66 log.debug("No action");
67 }
68 }
69
70 log.debug("Action is now: {}", data::getAction);
71
72 // Pass control to the next Valve in the Pipeline
73 context.invokeNext(pipelineData);
74 }
75 }