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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.util;
21  
22  import org.apache.myfaces.tobago.ajax.AjaxUtils;
23  import org.slf4j.Logger;
24  import org.slf4j.LoggerFactory;
25  
26  import javax.faces.application.NavigationHandler;
27  import javax.faces.context.FacesContext;
28  
29  public class DebugNavigationHandler extends NavigationHandler {
30  
31    private static final Logger LOG = LoggerFactory.getLogger(DebugNavigationHandler.class);
32  
33    private NavigationHandler navigationHandler;
34  
35    public DebugNavigationHandler(final NavigationHandler navigationHandler) {
36      this.navigationHandler = navigationHandler;
37    }
38  
39    public void handleNavigation(final FacesContext facesContext, final String fromAction, final String outcome) {
40      if (LOG.isDebugEnabled()) {
41        LOG.debug("Handle Navigation context: " + facesContext + " fromAction: '"
42            + fromAction + "' outcome: '" + outcome + "'");
43      }
44  
45      if (outcome != null && AjaxUtils.isAjaxRequest(facesContext)) {
46          LOG.warn("An AJAX-Request should not have an outcome set: outcome='" + outcome + "'");
47      }
48  
49      navigationHandler.handleNavigation(facesContext, fromAction, outcome);
50  
51      if (LOG.isDebugEnabled()) {
52        LOG.debug("Handled Navigation context: " + facesContext + " fromAction: '"
53            + fromAction + "' outcome: '" + outcome + "'");
54      }
55  
56    }
57  }