service/simulator/java/eclipse-plugin/ServiceProviderPlugin/src/oic/simulator/serviceprovider/view/LogView.java

   1 /*
   2  * Copyright 2015 Samsung Electronics All Rights Reserved.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package oic.simulator.serviceprovider.view;
  18
  19 import org.eclipse.jface.action.Action;
  20 import org.eclipse.jface.action.IAction;
  21 import org.eclipse.jface.action.IContributionItem;
  22 import org.eclipse.jface.action.IMenuManager;
  23 import org.eclipse.jface.action.IToolBarManager;
  24 import org.eclipse.jface.action.MenuManager;
  25 import org.eclipse.jface.action.Separator;
  26 import org.eclipse.jface.dialogs.MessageDialog;
  27 import org.eclipse.jface.resource.ImageDescriptor;
  28 import org.eclipse.jface.viewers.DoubleClickEvent;
  29 import org.eclipse.jface.viewers.IDoubleClickListener;
  30 import org.eclipse.jface.viewers.ISelectionChangedListener;
  31 import org.eclipse.jface.viewers.IStructuredSelection;
  32 import org.eclipse.jface.viewers.SelectionChangedEvent;
  33 import org.eclipse.jface.viewers.StructuredSelection;
  34 import org.eclipse.jface.viewers.TreeViewer;
  35 import org.eclipse.jface.viewers.Viewer;
  36 import org.eclipse.jface.viewers.ViewerComparator;
  37 import org.eclipse.jface.window.Window;
  38 import org.eclipse.swt.SWT;
  39 import org.eclipse.swt.events.KeyEvent;
  40 import org.eclipse.swt.events.KeyListener;
  41 import org.eclipse.swt.events.SelectionAdapter;
  42 import org.eclipse.swt.events.SelectionEvent;
  43 import org.eclipse.swt.layout.GridData;
  44 import org.eclipse.swt.widgets.Composite;
  45 import org.eclipse.swt.widgets.Display;
  46 import org.eclipse.swt.widgets.FileDialog;
  47 import org.eclipse.swt.widgets.Text;
  48 import org.eclipse.swt.widgets.Tree;
  49 import org.eclipse.swt.widgets.TreeColumn;
  50 import org.eclipse.swt.widgets.TreeItem;
  51 import org.eclipse.ui.IActionBars;
  52 import org.eclipse.ui.IWorkbenchActionConstants;
  53 import org.eclipse.ui.IWorkbenchPage;
  54 import org.eclipse.ui.dialogs.FilteredTree;
  55 import org.eclipse.ui.dialogs.PatternFilter;
  56 import org.eclipse.ui.part.ViewPart;
  57
  58 import java.io.BufferedWriter;
  59 import java.io.FileWriter;
  60 import java.io.IOException;
  61 import java.text.DateFormat;
  62 import java.text.SimpleDateFormat;
  63 import java.util.HashMap;
  64 import java.util.List;
  65
  66 import org.oic.simulator.ILogger.Level;
  67
  68 import oic.simulator.logger.LogContentProvider;
  69 import oic.simulator.logger.LogEntry;
  70 import oic.simulator.logger.LogLabelProvider;
  71 import oic.simulator.serviceprovider.Activator;
  72 import oic.simulator.serviceprovider.listener.ILogListener;
  73 import oic.simulator.serviceprovider.manager.LogManager;
  74 import oic.simulator.serviceprovider.utils.Constants;
  75 import oic.simulator.serviceprovider.view.dialogs.FilterDialog;
  76 import oic.simulator.serviceprovider.view.dialogs.LogDetailsDialog;
  77
  78 /**
  79  * This class manages and shows the log view in the perspective.
  80  */
  81 public class LogView extends ViewPart {
  82
  83     public static final String        VIEW_ID              = "oic.simulator.serviceprovider.view.log";
  84
  85     private LogManager                logManager;
  86     private ILogListener              logListener;
  87
  88     private LogContentProvider        treeContentProvider;
  89
  90     private FilteredTree              tree;
  91     private TreeColumn                severityColumn;
  92     private TreeColumn                dateColumn;
  93     private TreeColumn                messageColumn;
  94
  95     private IAction                   exportLogAction;
  96     private IAction                   clearLogAction;
  97     private IAction                   deleteLogAction;
  98     private IAction                   scrollLockAction;
  99     private IAction                   logDetailsAction;
 100     private IAction                   filterAction;
 101     private IAction                   activateViewAction;
 102     private IAction                   showTextFilter;
 103     private IContributionItem         groupByAction;
 104
 105     private HashMap<Integer, Boolean> shownSeverities      = new HashMap<Integer, Boolean>();
 106
 107     private boolean                   activateOnChange     = false;
 108
 109     private boolean                   hideTextFilter       = false;
 110
 111     private boolean                   scrollLockDisabled;
 112
 113     public static final int           ORDER_BY_TIME        = 0;
 114     public static final int           ORDER_BY_SEVERITY    = 1;
 115     public static final int           ORDER_BY_MESSAGE     = 2;
 116
 117     int                               sortCandidate        = ORDER_BY_TIME;
 118
 119     SortAction                        sortByTimeAction     = new SortAction(
 120                                                                    "Order by Time",
 121                                                                    ORDER_BY_TIME);
 122     SortAction                        sortBySeverityAction = new SortAction(
 123                                                                    "Order by Severity",
 124                                                                    ORDER_BY_SEVERITY);
 125     SortAction                        sortByMessageAction  = new SortAction(
 126                                                                    "Order by Message",
 127                                                                    ORDER_BY_MESSAGE);
 128
 129     private ViewerComparator          dateComparator;
 130     private ViewerComparator          severityComparator;
 131     private ViewerComparator          messageComparator;
 132
 133     private TreeColumn                sortColumn           = null;
 134     private static int                DOWN                 = 1;
 135     private static int                UP                   = -1;
 136     private int                       sortDirection        = DOWN;
 137
 138     public LogView() {
 139
 140         logListener = new ILogListener() {
 141
 142             @Override
 143             public void logChanged(final List<LogEntry> entry) {
 144                 Display.getDefault().asyncExec(new Runnable() {
 145
 146                     @Override
 147                     public void run() {
 148                         TreeViewer viewer = tree.getViewer();
 149                         if (viewer.getControl().isDisposed()) {
 150                             return;
 151                         }
 152                         viewer.setInput(entry);
 153                         updateTree(false);
 154                     }
 155                 });
 156             }
 157
 158             @Override
 159             public void logAdded(final LogEntry added) {
 160                 Display.getDefault().asyncExec(new Runnable() {
 161
 162                     @Override
 163                     public void run() {
 164                         TreeViewer viewer = tree.getViewer();
 165                         if (viewer.getControl().isDisposed()) {
 166                             return;
 167                         }
 168                         LogContentProvider provider = (LogContentProvider) viewer
 169                                 .getContentProvider();
 170                         provider.addLog(added);
 171                         tree.getViewer().add(viewer.getInput(), added);
 172                         @SuppressWarnings("unchecked")
 173                         List<LogEntry> input = (List<LogEntry>) viewer
 174                                 .getInput();
 175                         if (input.size() > Constants.LOG_SIZE) {
 176                             viewer.remove(viewer.getInput(), 0);
 177                         }
 178                         updateTree(true);
 179                     }
 180                 });
 181             }
 182
 183             private void updateTree(boolean needscroll) {
 184                 if (activateOnChange) {
 185                     IWorkbenchPage page = Activator.getDefault().getWorkbench()
 186                             .getActiveWorkbenchWindow().getActivePage();
 187                     if (page != null) {
 188                         page.bringToTop(LogView.this);
 189                     }
 190                 }
 191                 if (scrollLockDisabled && needscroll) {
 192                     Tree tree2 = tree.getViewer().getTree();
 193                     if (tree2.getItemCount() > 0) {
 194                         TreeItem item = tree2.getItem(tree2.getItemCount() - 1);
 195                         tree2.setTopItem(item);
 196                         deleteLogAction.setEnabled(true);
 197                     }
 198                 }
 199             }
 200         };
 201
 202         logManager = Activator.getDefault().getLogManager();
 203
 204         // Initially state of scroll lock
 205         scrollLockDisabled = true;
 206     }
 207
 208     @Override
 209     public void createPartControl(Composite parent) {
 210         PatternFilter filter = new PatternFilter() {
 211
 212             DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss.SSS");
 213
 214             @Override
 215             protected boolean isLeafMatch(Viewer viewer, Object element) {
 216                 if (element instanceof LogEntry) {
 217                     LogEntry logEntry = (LogEntry) element;
 218                     String severity = LogManager.getSeverityName(logEntry
 219                             .getSeverity());
 220                     String date = dateFormat.format(logEntry.getDate());
 221                     String message = logEntry.getMessage();
 222                     return wordMatches(severity) || wordMatches(date)
 223                             || wordMatches(message);
 224                 }
 225                 return false;
 226             }
 227         };
 228         filter.setIncludeLeadingWildcard(true);
 229         tree = new FilteredTree(parent, SWT.SINGLE | SWT.H_SCROLL
 230                 | SWT.V_SCROLL | SWT.FULL_SELECTION, filter, true);
 231
 232         setupFilteredTree();
 233
 234         createColumnComparators();
 235
 236         createActions();
 237
 238         setDefaultShownSeverities();
 239
 240         IActionBars actionBars = getViewSite().getActionBars();
 241         IToolBarManager toolBarManager = actionBars.getToolBarManager();
 242         toolBarManager.add(exportLogAction);
 243         toolBarManager.add(clearLogAction);
 244         toolBarManager.add(deleteLogAction);
 245         toolBarManager.add(scrollLockAction);
 246         toolBarManager
 247                 .add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
 248
 249         IMenuManager mgr = actionBars.getMenuManager();
 250         mgr.add(groupByAction);
 251         mgr.add(new Separator());
 252         mgr.add(filterAction);
 253         mgr.add(new Separator());
 254         mgr.add(activateViewAction);
 255         mgr.add(showTextFilter);
 256
 257         addManagerListeners();
 258
 259         if (sortCandidate == ORDER_BY_TIME) {
 260             sortByTimeAction.run();
 261         } else if (sortCandidate == ORDER_BY_SEVERITY) {
 262             sortBySeverityAction.run();
 263         } else { // order_selected == ORDER_BY_NONE
 264             sortByMessageAction.run();
 265         }
 266
 267     }
 268
 269     private void setupFilteredTree() {
 270         tree.setLayoutData(new GridData(GridData.FILL_BOTH));
 271         final Tree innerTree = tree.getViewer().getTree();
 272         innerTree.setLinesVisible(true);
 273
 274         severityColumn = new TreeColumn(innerTree, SWT.LEFT);
 275         severityColumn.setText("Severity");
 276         severityColumn.setWidth(110);
 277         severityColumn.addSelectionListener(new SelectionAdapter() {
 278
 279             @Override
 280             public void widgetSelected(SelectionEvent e) {
 281                 sortBySeverityAction.run();
 282             }
 283         });
 284         dateColumn = new TreeColumn(innerTree, SWT.LEFT);
 285         dateColumn.setText("Time");
 286         dateColumn.setWidth(110);
 287         dateColumn.addSelectionListener(new SelectionAdapter() {
 288
 289             @Override
 290             public void widgetSelected(SelectionEvent e) {
 291                 sortByTimeAction.run();
 292             }
 293         });
 294         messageColumn = new TreeColumn(innerTree, SWT.LEFT);
 295         messageColumn.setText("Message");
 296         messageColumn.setWidth(180);
 297         messageColumn.addSelectionListener(new SelectionAdapter() {
 298             @Override
 299             public void widgetSelected(SelectionEvent e) {
 300                 sortByMessageAction.run();
 301             }
 302         });
 303
 304         innerTree.setHeaderVisible(true);
 305
 306         treeContentProvider = new LogContentProvider();
 307
 308         tree.getViewer().setContentProvider(treeContentProvider);
 309         tree.getViewer().setLabelProvider(new LogLabelProvider());
 310
 311         tree.getViewer().setInput(logManager.getLogEntries());
 312
 313         tree.getViewer().addSelectionChangedListener(
 314                 new ISelectionChangedListener() {
 315
 316                     @Override
 317                     public void selectionChanged(SelectionChangedEvent event) {
 318                         deleteLogAction.setEnabled(!tree.getViewer()
 319                                 .getSelection().isEmpty());
 320                         logDetailsAction.setEnabled(!tree.getViewer()
 321                                 .getSelection().isEmpty());
 322                     }
 323                 });
 324
 325         tree.getViewer().getTree().addKeyListener(new KeyListener() {
 326
 327             @Override
 328             public void keyReleased(KeyEvent e) {
 329             }
 330
 331             @Override
 332             public void keyPressed(KeyEvent e) {
 333                 if (e.character == (char) 127) { // If delete key is pressed
 334                     if (deleteLogAction.isEnabled()) {
 335                         deleteLogAction.run();
 336                     }
 337                 }
 338             }
 339         });
 340
 341         tree.getViewer().addDoubleClickListener(new IDoubleClickListener() {
 342
 343             @Override
 344             public void doubleClick(DoubleClickEvent event) {
 345                 logDetailsAction.run();
 346             }
 347         });
 348     }
 349
 350     private void createColumnComparators() {
 351         dateComparator = new ViewerComparator() {
 352
 353             @Override
 354             public int compare(Viewer viewer, Object e1, Object e2) {
 355                 LogEntry l1 = (LogEntry) e1;
 356                 LogEntry l2 = (LogEntry) e2;
 357                 return l1.getDate().compareTo(l2.getDate()) * sortDirection;
 358             }
 359         };
 360
 361         severityComparator = new ViewerComparator() {
 362
 363             @Override
 364             public int compare(Viewer viewer, Object e1, Object e2) {
 365                 LogEntry l1 = (LogEntry) e1;
 366                 LogEntry l2 = (LogEntry) e2;
 367                 if (l1.getSeverity() < l2.getSeverity()) {
 368                     return -1 * sortDirection;
 369                 }
 370                 if (l1.getSeverity() > l2.getSeverity()) {
 371                     return 1 * sortDirection;
 372                 }
 373                 return 0;
 374             }
 375         };
 376
 377         messageComparator = new ViewerComparator() {
 378
 379             @Override
 380             public int compare(Viewer viewer, Object e1, Object e2) {
 381                 LogEntry l1 = (LogEntry) e1;
 382                 LogEntry l2 = (LogEntry) e2;
 383                 return l1.getMessage().compareTo(l2.getMessage())
 384                         * sortDirection;
 385             }
 386         };
 387
 388     }
 389
 390     private void setDefaultShownSeverities() {
 391         shownSeverities.put(Level.INFO.ordinal(), true);
 392         shownSeverities.put(Level.DEBUG.ordinal(), true);
 393         shownSeverities.put(Level.WARNING.ordinal(), true);
 394         shownSeverities.put(Level.ERROR.ordinal(), true);
 395     }
 396
 397     private void addManagerListeners() {
 398         logManager.addLogListener(logListener);
 399         logManager.applyFilter(shownSeverities);
 400     }
 401
 402     private void createActions() {
 403         exportLogAction = createExportLogAction();
 404         clearLogAction = createClearLogAction();
 405         deleteLogAction = createDeleteLogAction();
 406         scrollLockAction = createScrollLockAction();
 407         logDetailsAction = createLogDetailsAction();
 408
 409         filterAction = createFilterAction();
 410         activateViewAction = createActivateViewAction();
 411         showTextFilter = createShowTextFilter();
 412         groupByAction = createGroupByAction();
 413     }
 414
 415     private IAction createExportLogAction() {
 416         Action action = new Action("Export log") {
 417             @Override
 418             public void run() {
 419                 FileDialog fd = new FileDialog(Display.getDefault()
 420                         .getActiveShell(), SWT.SAVE);
 421                 fd.setOverwrite(true);
 422                 fd.setFileName("OIC_Simulator_ServerLog.log");
 423                 fd.setFilterExtensions(Constants.SAVE_LOG_FILTER_EXTENSIONS);
 424                 String name = fd.open();
 425                 List<LogEntry> logEntries = logManager.getLogEntries();
 426                 StringBuilder sb = new StringBuilder();
 427                 for (LogEntry entry : logEntries) {
 428                     sb.append(entry.toString());
 429                 }
 430                 String data = sb.toString();
 431                 BufferedWriter out = null;
 432                 try {
 433                     out = new BufferedWriter(new FileWriter(name));
 434                     out.write(data);
 435                 } catch (IOException e) {
 436                     e.printStackTrace();
 437                     MessageDialog.openError(
 438                             Display.getDefault().getActiveShell(),
 439                             "Export error",
 440                             "Could not export log. IO exception: "
 441                                     + e.getMessage());
 442                 } finally {
 443                     try {
 444                         if (null != out) {
 445                             out.close();
 446                         }
 447                     } catch (IOException e) {
 448                         System.out.println("Error occurred during close.");
 449                     }
 450                 }
 451             }
 452         };
 453         action.setToolTipText("Export log");
 454
 455         action.setImageDescriptor(ImageDescriptor.createFromFile(
 456                 this.getClass(), "/icons/export_log_e.gif"));
 457         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 458                 this.getClass(), "/icons/export_log_d.gif"));
 459         action.setEnabled(true);
 460
 461         return action;
 462     }
 463
 464     private IAction createClearLogAction() {
 465         Action action = new Action("Clear log") {
 466
 467             @Override
 468             public void run() {
 469                 logManager.clearLog();
 470             }
 471         };
 472         action.setToolTipText("Clear log");
 473
 474         action.setImageDescriptor(ImageDescriptor.createFromFile(
 475                 this.getClass(), "/icons/clear_e.gif"));
 476         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 477                 this.getClass(), "/icons/clear_d.gif"));
 478         action.setEnabled(true);
 479         return action;
 480     }
 481
 482     private IAction createDeleteLogAction() {
 483         Action action = new Action("Delete log entry") {
 484
 485             @Override
 486             @SuppressWarnings("unchecked")
 487             public void run() {
 488                 IStructuredSelection selection = (IStructuredSelection) tree
 489                         .getViewer().getSelection();
 490                 List<LogEntry> entries = (List<LogEntry>) tree.getViewer()
 491                         .getInput();
 492                 LogEntry selectedEntry = (LogEntry) selection.getFirstElement();
 493                 if (null != selectedEntry) {
 494                     LogEntry toBeShownEntry = null;
 495                     for (LogEntry entry : entries) {
 496                         if (entry.equals(selectedEntry)) {
 497                             int size = entries.size();
 498                             int index = entries.indexOf(selectedEntry);
 499                             if (index + 1 < size) {
 500                                 toBeShownEntry = entries.get(index + 1);
 501                             } else if (index > 0) {
 502                                 toBeShownEntry = entries.get(index - 1);
 503                             }
 504                             break;
 505                         }
 506                     }
 507                     logManager.removeEntry(selectedEntry);
 508                     if (null != toBeShownEntry) {
 509                         tree.getViewer().setSelection(
 510                                 new StructuredSelection(toBeShownEntry));
 511                     }
 512                 }
 513             }
 514         };
 515         action.setToolTipText("Delete log entry");
 516         action.setImageDescriptor(ImageDescriptor.createFromFile(
 517                 this.getClass(), "/icons/delete_e.gif"));
 518         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 519                 this.getClass(), "/icons/delete_d.gif"));
 520         action.setEnabled(false);
 521         return action;
 522     }
 523
 524     private IAction createScrollLockAction() {
 525         Action action = new Action("Scroll lock") {
 526
 527             @Override
 528             public void run() {
 529                 scrollLockDisabled = !this.isChecked();
 530             };
 531
 532             @Override
 533             public int getStyle() {
 534                 return IAction.AS_CHECK_BOX;
 535             }
 536         };
 537         action.setToolTipText("Scroll lock");
 538         action.setImageDescriptor(ImageDescriptor.createFromFile(
 539                 this.getClass(), "/icons/lock_e.gif"));
 540         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 541                 this.getClass(), "/icons/lock_d.gif"));
 542         action.setEnabled(true);
 543         return action;
 544     }
 545
 546     private IAction createLogDetailsAction() {
 547         Action action = new Action("Details...") {
 548
 549             @Override
 550             public void run() {
 551                 Display.getDefault().asyncExec(new Runnable() {
 552
 553                     @Override
 554                     public void run() {
 555                         LogEntry x = (LogEntry) ((IStructuredSelection) tree
 556                                 .getViewer().getSelection()).getFirstElement();
 557
 558                         new LogDetailsDialog(Display.getDefault()
 559                                 .getActiveShell(), LogManager.getSeverityName(x
 560                                 .getSeverity()), LogManager.getSeverityIcon(x
 561                                 .getSeverity()), x.getDate(), x.getMessage())
 562                                 .open();
 563                     }
 564                 });
 565             }
 566         };
 567         action.setToolTipText("Details...");
 568         action.setImageDescriptor(ImageDescriptor.createFromFile(
 569                 this.getClass(), "/icons/log_details_e.gif"));
 570         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 571                 this.getClass(), "/icons/log_details_e.gif"));
 572         action.setEnabled(false);
 573         return action;
 574     }
 575
 576     private IAction createFilterAction() {
 577         Action action = new Action("Filters ...") {
 578
 579             @Override
 580             public void run() {
 581                 FilterDialog fd = new FilterDialog(Display.getDefault()
 582                         .getActiveShell(), shownSeverities);
 583                 if (fd.open() == Window.OK) {
 584                     logManager.applyFilter(shownSeverities);
 585                 }
 586                 tree.getViewer().refresh();
 587             }
 588         };
 589         action.setToolTipText("Filters ...");
 590
 591         action.setImageDescriptor(ImageDescriptor.createFromFile(
 592                 this.getClass(), "/icons/filter_e.gif"));
 593         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 594                 this.getClass(), "/icons/filter_d.gif"));
 595         action.setEnabled(true);
 596         return action;
 597     }
 598
 599     private IAction createActivateViewAction() {
 600         Action action = new Action("Activate view on new events",
 601                 IAction.AS_CHECK_BOX) {
 602
 603             @Override
 604             public void run() {
 605                 activateOnChange = this.isChecked();
 606             }
 607         };
 608         action.setChecked(activateOnChange);
 609         action.setToolTipText("Activate view on new events");
 610
 611         action.setImageDescriptor(ImageDescriptor.createFromFile(
 612                 this.getClass(), "/icons/prop_e.gif"));
 613         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 614                 this.getClass(), "/icons/prop_d.gif"));
 615         action.setEnabled(true);
 616         return action;
 617     }
 618
 619     private IAction createShowTextFilter() {
 620         Action action = new Action("Show text filter", IAction.AS_CHECK_BOX) {
 621
 622             @Override
 623             public void run() {
 624                 Text filterControl = tree.getFilterControl();
 625                 Composite filterComposite = filterControl.getParent();
 626                 GridData gd = (GridData) filterComposite.getLayoutData();
 627                 boolean visible = isChecked();
 628                 gd.exclude = !visible;
 629                 filterComposite.setVisible(visible);
 630                 filterControl.setText("");
 631                 if (visible) {
 632                     filterControl.selectAll();
 633                     setFocus();
 634                 }
 635                 tree.layout(false);
 636                 hideTextFilter = !visible;
 637             }
 638         };
 639         action.setToolTipText("Show text filter");
 640
 641         action.setImageDescriptor(ImageDescriptor.createFromFile(
 642                 this.getClass(), "/icons/tree_mode_e.gif"));
 643         action.setDisabledImageDescriptor(ImageDescriptor.createFromFile(
 644                 this.getClass(), "/icons/tree_mode_d.gif"));
 645         action.setEnabled(true);
 646         action.setChecked(!hideTextFilter);
 647         if (hideTextFilter) {
 648             action.run();
 649         }
 650         return action;
 651     }
 652
 653     private IContributionItem createGroupByAction() {
 654         IMenuManager manager = new MenuManager("Order by");
 655         manager.add(sortByTimeAction);
 656         manager.add(sortBySeverityAction);
 657         manager.add(sortByMessageAction);
 658         return manager;
 659     }
 660
 661     class SortAction extends Action {
 662
 663         private final int sortBy;
 664
 665         public SortAction(String text, int sortBy) {
 666             super(text, IAction.AS_RADIO_BUTTON);
 667             this.sortBy = sortBy;
 668
 669             if (sortCandidate == sortBy) {
 670                 setChecked(true);
 671             }
 672         }
 673
 674         @Override
 675         public void run() {
 676             sortBySeverityAction.setChecked(false);
 677             sortByTimeAction.setChecked(false);
 678             sortCandidate = sortBy;
 679             setChecked(true);
 680
 681             ViewerComparator comparator;
 682             TreeColumn column;
 683             if (sortBy == ORDER_BY_SEVERITY) {
 684                 comparator = severityComparator;
 685                 column = severityColumn;
 686             } else if (sortBy == ORDER_BY_TIME) {
 687                 comparator = dateComparator;
 688                 column = dateColumn;
 689             } else { // Order by message
 690                 comparator = messageComparator;
 691                 column = messageColumn;
 692             }
 693             TreeViewer viewer = tree.getViewer();
 694             viewer.setComparator(comparator);
 695             viewer.getTree().setSortColumn(column);
 696             if (column.equals(sortColumn)) { // reverse sorting order
 697                 sortDirection = viewer.getTree().getSortDirection() == SWT.UP ? DOWN
 698                         : UP;
 699                 viewer.getTree().setSortDirection(
 700                         sortDirection == UP ? SWT.UP : SWT.DOWN);
 701                 viewer.refresh();
 702             } else { // set this column as the one to sort by
 703                 sortDirection = DOWN;
 704                 viewer.getTree().setSortDirection(SWT.DOWN);
 705             }
 706             sortColumn = column;
 707             refresh();
 708         }
 709     }
 710
 711     private void refresh() {
 712         tree.getViewer().refresh();
 713     }
 714
 715     @Override
 716     public void setFocus() {
 717         tree.setFocus();
 718     }
 719
 720     @Override
 721     public void dispose() {
 722         logManager.removeLogListener(logListener);
 723         super.dispose();
 724     }
 725 }