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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.scxml.env;
18  
19  import java.io.Serializable;
20  
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  import org.apache.commons.scxml.SCXMLListener;
24  import org.apache.commons.scxml.model.Transition;
25  import org.apache.commons.scxml.model.TransitionTarget;
26  
27  
28  /***
29   * Simple SCXML Listener that logs execution.
30   */
31  public class SimpleSCXMLListener implements SCXMLListener, Serializable {
32  
33      /*** Serial version UID. */
34      private static final long serialVersionUID = 1L;
35      /*** Log. */
36      private Log log = LogFactory.getLog(getClass());
37  
38  
39      /***
40       * @see SCXMLListener#onEntry(TransitionTarget)
41       */
42      public void onEntry(final TransitionTarget state) {
43          if (log.isInfoEnabled()) {
44              log.info(LogUtils.getTTPath(state));
45          }
46      }
47  
48      /***
49       * @see SCXMLListener#onExit(TransitionTarget)
50       */
51      public void onExit(final TransitionTarget state) {
52          if (log.isInfoEnabled()) {
53              log.info(LogUtils.getTTPath(state));
54          }
55      }
56  
57      /***
58  * @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition)
59       */
60      public void onTransition(final TransitionTarget from,
61              final TransitionTarget to, final Transition transition) {
62          if (log.isInfoEnabled()) {
63              log.info(LogUtils.transToString(from, to, transition));
64          }
65      }
66  
67  }
68