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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  
18  package org.apache.log4j.chainsaw;
19  
20  import java.awt.event.ActionEvent;
21  import java.io.File;
22  import java.io.IOException;
23  import java.net.URL;
24  import java.util.HashMap;
25  import java.util.Iterator;
26  import java.util.Map;
27  import java.util.Vector;
28  
29  import javax.swing.AbstractAction;
30  import javax.swing.JFileChooser;
31  import javax.swing.JOptionPane;
32  import javax.swing.filechooser.FileFilter;
33  
34  import org.apache.log4j.Logger;
35  import org.apache.log4j.chainsaw.prefs.MRUFileList;
36  import org.apache.log4j.helpers.Constants;
37  import org.apache.log4j.spi.Decoder;
38  import org.apache.log4j.spi.LoggingEvent;
39  
40  /***
41   * Allows the user to specify a particular file to open and import the events
42   * into a new tab.
43   * 
44   * @author Paul Smith <psmith@apache.org>
45   * @author Scott Deboy <sdeboy@apache.org>
46   *  
47   */
48  class FileLoadAction extends AbstractAction {
49      private static final Logger LOG = Logger.getLogger(FileLoadAction.class);
50  
51      /***
52       * This action must have a reference to a LogUI window so that it can append
53       * the events it loads
54       *  
55       */
56      Decoder decoder = null;
57  
58      private LogUI parent;
59  
60      private JFileChooser chooser = null;
61  
62      private boolean remoteURL = false;
63  
64      public FileLoadAction(LogUI parent, Decoder decoder, String title,
65              boolean isRemoteURL) {
66          super(title);
67          remoteURL = isRemoteURL;
68          this.decoder = decoder;
69          this.parent = parent;
70      }
71  
72      /*
73       * When the user chooses the Load action, a File chooser is presented to
74       * allow them to find an XML file to load events from.
75       * 
76       * Any events decoded from this file are added to one of the tabs.
77       * 
78       * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
79       */
80      public void actionPerformed(ActionEvent e) {
81          String name = "";
82          URL url = null;
83  
84          if (!remoteURL) {
85              if (chooser == null) {
86                  chooser = new JFileChooser();
87              }
88  
89              chooser.setDialogTitle("Load Events from XML file...");
90  
91              chooser.setAcceptAllFileFilterUsed(true);
92  
93              chooser.setFileFilter(new FileFilter() {
94                  public boolean accept(File f) {
95                      return (f.getName().toLowerCase().endsWith(".xml") || f
96                              .isDirectory());
97                  }
98  
99                  public String getDescription() {
100                     return "XML files (*.xml)";
101                 }
102             });
103 
104             int i = chooser.showOpenDialog(parent);
105             if (i != JFileChooser.APPROVE_OPTION) {
106                 return;
107             }
108             File selectedFile = chooser.getSelectedFile();
109 
110             try {
111                 url = selectedFile.toURI().toURL();
112                 name = selectedFile.getName();
113             } catch (Exception ex) {
114                 // TODO: handle exception
115             }
116         } else {
117             String urltext = JOptionPane
118                     .showInputDialog(parent,
119                             "<html>Please type in the <b>complete</b> URL to the remote XML source.</html>");
120 
121             if (urltext != null) {
122                 try {
123                     url = new URL(urltext);
124                 } catch (Exception ex) {
125                     JOptionPane.showMessageDialog(parent, "'" + urltext
126                             + "' is not a valid URL.");
127                 }
128             }
129         }
130 
131         if (url != null) {
132             importURL(parent.handler, decoder, name, url);
133             MRUFileList.log4jMRU().opened(url);
134         }
135     }
136 
137     /***
138      * Imports a URL into Chainsaw, by using the Decoder, and 
139      * using the name value as the Application key which (usually) determines
140      * the Tab name
141      * @param name
142      * @param url URL to import
143      */
144     public static void importURL(final ChainsawAppenderHandler handler, final Decoder decoder, String name, URL url) {
145         Map additionalProperties = new HashMap();
146         additionalProperties.put(Constants.HOSTNAME_KEY, "file");
147         additionalProperties.put(Constants.APPLICATION_KEY, name);
148         decoder.setAdditionalProperties(additionalProperties);
149 
150         final URL urlToUse = url;
151         new Thread(new Runnable() {
152             public void run() {
153                 try {
154                     Vector events = decoder.decode(urlToUse);
155                     Iterator iter = events.iterator();
156                     while (iter.hasNext()) {
157                         handler.append((LoggingEvent) iter.next());
158                     }
159                 } catch (IOException e1) {
160                     // TODO Handle the error with a nice msg
161                     LOG.error(e1);
162                 }
163                 MRUFileList.log4jMRU().opened(urlToUse);
164             }
165         }).start();
166     }
167 }