security/plugins/org.argeo.security.ui/src/main/java/org/argeo/security/ui/views/LogContentProvider.java

   1 package org.argeo.security.ui.views;
   2
   3 import java.text.DateFormat;
   4 import java.text.SimpleDateFormat;
   5 import java.util.Date;
   6 import java.util.List;
   7
   8 import org.argeo.ArgeoLogListener;
   9 import org.eclipse.jface.viewers.ILazyContentProvider;
  10 import org.eclipse.jface.viewers.TableViewer;
  11 import org.eclipse.jface.viewers.Viewer;
  12
  13 /** A content provider maintaing an array of lines */
  14 class LogContentProvider implements ILazyContentProvider, ArgeoLogListener {
  15         private DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
  16
  17         private final TableViewer viewer;
  18         private List<String> lines;
  19
  20         public LogContentProvider(TableViewer viewer) {
  21                 this.viewer = viewer;
  22         }
  23
  24         public synchronized void dispose() {
  25                 lines = null;
  26         }
  27
  28         @SuppressWarnings("unchecked")
  29         public synchronized void inputChanged(Viewer viewer, Object oldInput,
  30                         Object newInput) {
  31                 lines = (List<String>) newInput;
  32                 if (lines == null)
  33                         return;
  34                 this.viewer.setItemCount(lines.size());
  35         }
  36
  37         public void updateElement(int index) {
  38                 viewer.replace(lines.get(index), index);
  39         }
  40
  41         public synchronized void appendLog(String username, Long timestamp,
  42                         String level, String category, String thread, Object msg,
  43                         String[] exception) {
  44                 // check if valid
  45                 if (lines == null)
  46                         return;
  47
  48                 String message = msg.toString();
  49                 StringBuffer buf = new StringBuffer("");
  50                 buf.append(dateFormat.format(new Date(timestamp))).append(" ");
  51                 buf.append(level).append(" ");
  52                 int count = 0;
  53                 String lastLine = null;
  54                 for (String line : message.split("\n")) {
  55                         if (count == 0)
  56                                 lastLine = buf + line;
  57                         else
  58                                 lastLine = line;
  59                         lines.add(lastLine);
  60                         count++;
  61                 }
  62
  63                 if (exception != null) {
  64                         for (String ste : exception) {
  65                                 lastLine = ste;
  66                                 lines.add(lastLine);
  67                         }
  68                 }
  69                 final Object lastElement = lastLine;
  70                 viewer.getTable().getDisplay().asyncExec(new Runnable() {
  71                         public void run() {
  72                                 viewer.setItemCount(lines.size());
  73                                 if (lastElement != null)
  74                                         viewer.reveal(lastElement);
  75                         }
  76                 });
  77         }
  78         // private class LogLine {
  79         // private String message;
  80         // }
  81 }