3 import jalview.bin.Cache;
4 import jalview.gui.Desktop;
5 import jalview.gui.JvOptionPane;
6 import jalview.util.MessageManager;
9 import java.io.IOException;
10 import java.text.SimpleDateFormat;
11 import java.util.ArrayList;
12 import java.util.HashMap;
14 import java.util.TreeMap;
17 * BackupFiles used for manipulating (naming rolling/deleting) backup/version files when an alignment or project file is saved.
18 * User configurable options are:
19 * BACKUPFILES_ENABLED - boolean flag as to whether to use this mechanism or act as before, including overwriting files as saved.
20 * BACKUPFILES_SUFFIX - a template to insert after the file extension. Use '%n' to be replaced by a 0-led SUFFIX_DIGITS long integer.
21 * BACKUPFILES_NO_MAX - flag to turn off setting a maximum number of backup files to keep.
22 * BACKUPFILES_ROLL_MAX - the maximum number of backupfiles to keep for any one alignment or project file.
23 * BACKUPFILES_SUFFIX_DIGITS - the number of digits to insert replace %n with (e.g. BACKUPFILES_SUFFIX_DIGITS = 3 would make "001", "002", etc)
24 * BACKUPFILES_REVERSE_ORDER - if true then "logfile" style numbering and file rolling will occur. If false then ever-increasing version numbering will occur, but old files will still be deleted if there are more than ROLL_MAX backup files.
25 * BACKUPFILES_CONFIRM_DELETE_OLD - if true then prompt/confirm with the user when deleting older backup/version files.
28 public class BackupFiles
31 // labels for saved params in Cache and .jalview_properties
32 public static final String NS = "BACKUPFILES";
34 public static final String ENABLED = NS + "_ENABLED";
36 public static final String SUFFIX = NS + "_SUFFIX";
38 public static final String NO_MAX = NS + "_NO_MAX";
40 public static final String ROLL_MAX = NS + "_ROLL_MAX";
42 public static final String SUFFIX_DIGITS = NS + "_SUFFIX_DIGITS";
44 public static final String NUM_PLACEHOLDER = "%n";
46 public static final String REVERSE_ORDER = NS + "_REVERSE_ORDER";
48 public static final String CONFIRM_DELETE_OLD = NS
49 + "_CONFIRM_DELETE_OLD";
51 private static final String DEFAULT_TEMP_FILE = "jalview_temp_file_" + NS;
53 private static final String TEMP_FILE_EXT = ".tmp";
55 // file - File object to be backed up and then updated (written over)
58 // enabled - default flag as to whether to do the backup file roll (if not
59 // defined in preferences)
60 private static boolean enabled;
62 // confirmDelete - default flag as to whether to confirm with the user before
63 // deleting old backup/version files
64 private static boolean confirmDelete;
66 // defaultSuffix - default template to use to append to basename of file
67 private String suffix;
69 // noMax - flag to turn off a maximum number of files
70 private boolean noMax;
72 // defaultMax - default max number of backup files
75 // defaultDigits - number of zero-led digits to use in the filename
78 // reverseOrder - set to true to make newest (latest) files lowest number
79 // (like rolled log files)
80 private boolean reverseOrder;
82 // temp saved file to become new saved file
83 private File tempFile;
85 // flag set to see if file save to temp file was successful
86 private boolean tempFileWriteSuccess;
88 // array of files to be deleted, with extra information
89 private ArrayList<DeleteFile> deleteFiles = new ArrayList<>();
91 // next backup filename
92 private File nextBackupFile;
94 // date formatting for modification times
95 private static final SimpleDateFormat sdf = new SimpleDateFormat(
96 "yyyy-MM-dd HH:mm:ss");
98 public BackupFiles(String filename)
100 this(new File(filename));
103 // first time defaults for SUFFIX, NO_MAX, ROLL_MAX, SUFFIX_DIGITS and
105 public BackupFiles(File file)
107 this(file, ".bak" + NUM_PLACEHOLDER, false, 3, 3, false);
110 public BackupFiles(File file, String defaultSuffix, boolean defaultNoMax,
111 int defaultMax, int defaultDigits, boolean defaultReverseOrder)
115 this.suffix = Cache.getDefault(SUFFIX, defaultSuffix);
116 this.noMax = Cache.getDefault(NO_MAX, defaultNoMax);
117 this.max = Cache.getDefault(ROLL_MAX, defaultMax);
118 this.digits = Cache.getDefault(SUFFIX_DIGITS, defaultDigits);
119 this.reverseOrder = Cache.getDefault(REVERSE_ORDER,
120 defaultReverseOrder);
122 // create a temp file to save new data in
128 String tempfilename = file.getName();
129 File tempdir = file.getParentFile();
130 temp = File.createTempFile(tempfilename, TEMP_FILE_EXT, tempdir);
134 temp = File.createTempFile(DEFAULT_TEMP_FILE, TEMP_FILE_EXT);
136 } catch (IOException e)
139 "Could not create temp file to save into (IOException)");
140 } catch (Exception e)
142 System.out.println("Exception ctreating temp file for saving");
144 this.setTempFile(temp);
147 public static void classInit()
149 setEnabled(Cache.getDefault(ENABLED, true));
150 setConfirmDelete(Cache.getDefault(CONFIRM_DELETE_OLD, true));
153 public static void setEnabled(boolean flag)
158 public static boolean getEnabled()
164 public static void setConfirmDelete(boolean flag)
166 confirmDelete = flag;
169 public static boolean getConfirmDelete()
172 return confirmDelete;
175 // set, get and rename temp file into place
176 public void setTempFile(File temp)
178 this.tempFile = temp;
181 public File getTempFile()
186 public String getTempFilePath()
191 path = this.getTempFile().getCanonicalPath();
192 } catch (IOException e)
195 "IOException when getting Canonical Path of temp file '"
196 + this.getTempFile().getName() + "'");
201 public boolean setWriteSuccess(boolean flag)
203 boolean old = this.tempFileWriteSuccess;
204 this.tempFileWriteSuccess = flag;
208 public boolean getWriteSuccess()
210 return this.tempFileWriteSuccess;
213 public boolean renameTempFile()
215 return tempFile.renameTo(file);
218 // roll the backupfiles
219 public boolean rollBackupFiles()
221 return this.rollBackupFiles(true);
224 public boolean rollBackupFiles(boolean tidyUp)
226 // file doesn't yet exist or backups are not enabled or template is null or
228 if ((!file.exists()) || (!enabled) || max < 0 || suffix == null
229 || suffix.length() == 0)
239 dirFile = file.getParentFile();
240 dir = dirFile.getCanonicalPath();
241 } catch (Exception e)
244 "Could not get canonical path for file '" + file + "'");
247 String filename = file.getName();
248 String basename = filename;
251 // Create/move backups up one
254 //File[] oldFilesToDelete = null;
255 //File[] newerOldFilesToDelete = null; // put files with newer modification
256 // timestamps in here to warn the user!
258 // find existing backup files
259 BackupFilenameFilter bff = new BackupFilenameFilter(basename, suffix,
261 File[] backupFiles = dirFile.listFiles(bff);
262 int nextIndexNum = 0;
264 if (backupFiles.length == 0)
266 // No other backup files. Just need to move existing file to backupfile_1
271 TreeMap<Integer, File> bfTreeMap = sortBackupFilesAsTreeMap(
272 backupFiles, basename);
273 // bfTreeMap now a sorted list of <Integer index>,<File backupfile>
278 // backup style numbering
280 File lastfile = null;
281 File lastfiletobedeleted = null;
282 String lastfiletobedeletedoriginalname = null;
284 int tempMax = noMax ? -1 : max;
285 // noMax == true means no limits
286 // look for first "gap" in backupFiles
287 // if tempMax is -1 at this stage just keep going until there's a gap,
288 // then hopefully tempMax gets set to the right index (a positive
289 // integer so the loop breaks)...
290 // why do I feel a little uneasy about this loop?..
291 for (int i = 1; tempMax < 0 || i <= max; i++)
293 if (!bfTreeMap.containsKey(i)) // first index without existent
300 for (int n = tempMax; n > 0; n--)
302 String backupfilename = dir + File.separatorChar
303 + BackupFilenameParts.getBackupFilename(n, basename,
305 File backupfile_n = new File(backupfilename);
307 if (!backupfile_n.exists())
309 // no "oldest" file to delete
310 lastfile = backupfile_n;
311 lastfiletobedeleted = null;
315 // check the modification time of the previous file if it's going to
317 if (lastfiletobedeleted != null)
319 long oldLMT = lastfiletobedeleted.lastModified();
320 long newLMT = backupfile_n.lastModified();
323 String oldLMTString = sdf
324 .format(lastfiletobedeleted.lastModified());
325 String newLMTString = sdf.format(backupfile_n.lastModified());
326 System.out.println("WARNING! I am set to delete backupfile "
327 + lastfiletobedeleted.getName() + " (was '"
328 + lastfiletobedeletedoriginalname + "')"
329 + " has modification time "
331 + " which is newer than its replacement "
332 + backupfile_n.getName() + " with modification time "
335 addDeleteFile(lastfiletobedeleted, backupfile_n, true, true,
336 " (" + MessageManager.formatMessage(
337 "label.was_previous", new String[]
338 { backupfile_n.getName() }) + ")");
342 lastfiletobedeleted = null;
343 lastfiletobedeletedoriginalname = null;
346 if (!noMax && n == tempMax && backupfile_n.exists())
348 // move the largest (max) rolled file to a temp file and add to the
352 File temp = File.createTempFile(backupfilename, TEMP_FILE_EXT,
354 backupfile_n.renameTo(temp);
356 String message = "(" + MessageManager
357 .formatMessage("label.was_previous", new String[]
358 { backupfile_n.getName() }) + ")";
359 addDeleteFile(temp, backupfile_n, true, false, message);
361 lastfiletobedeleted = temp;
362 } catch (IOException e)
365 "IOException when creating temporary file for backupfilename");
371 if (lastfile != null)
373 ret = ret && backupfile_n.renameTo(lastfile);
377 lastfile = backupfile_n;
380 // index to use for the latest backup
385 // version style numbering (with earliest file deletion if max files
388 bfTreeMap.values().toArray(backupFiles);
390 // noMax == true means keep all backup files
391 if ((!noMax) && bfTreeMap.size() >= max)
393 // need to delete some files to keep number of backups to designated
395 int numToDelete = bfTreeMap.size() - max + 1;
396 for (int i = 0; i < numToDelete; i++)
398 addDeleteFile(backupFiles[i], null, true, false, null);
403 nextIndexNum = bfTreeMap.lastKey() + 1;
408 // Let's make the new backup file!! yay, got there at last!
409 String latestBackupFilename = dir + File.separatorChar
410 + BackupFilenameParts.getBackupFilename(nextIndexNum, basename,
412 nextBackupFile = new File(latestBackupFilename);
413 ret |= file.renameTo(nextBackupFile);
423 private void tidyUpFiles()
428 private void deleteOldFiles()
430 if (deleteFiles != null && !deleteFiles.isEmpty())
432 boolean confirm = confirmDelete;
433 // delete old backup/version files
435 // check for newer files
436 boolean newerDelete = hasNewerDeleteFile();
437 StringBuilder newerDeleteSB = null;
440 newerDeleteSB = new StringBuilder();
441 for (int i = 0; i < deleteFiles.size(); i++)
443 DeleteFile df = deleteFiles.get(i);
444 if (df.newer && df.delete)
446 String oldName = df.oldFile.getName();
447 String oldLMT = sdf.format(df.oldFile.lastModified());
448 String newLMT = sdf.format(df.newFile.lastModified());
449 if (newerDeleteSB.length() > 0)
451 newerDeleteSB.append("\n");
453 newerDeleteSB.append(
454 MessageManager.formatMessage("label.newerdelete_line",
456 { oldName, oldLMT, df.newFile.getName(),
460 && df.info.length() > 0)
462 newerDeleteSB.append(" ");
463 newerDeleteSB.append(df.info);
470 boolean doDelete = false;
471 StringBuilder deleteSB = null;
472 if (confirmDelete && deleteFiles.size() > 0)
474 deleteSB = new StringBuilder();
475 deleteSB.append(MessageManager
476 .getString("label.backupfiles_confirm_delete_old_files"));
477 for (int i = 0; i < deleteFiles.size(); i++)
479 DeleteFile df = deleteFiles.get(i);
484 deleteSB.append("\n");
485 deleteSB.append(df.oldFile.getName());
487 && df.info.length() > 0)
489 deleteSB.append("\n");
490 deleteSB.append(df.info);
498 StringBuilder messageSB = new StringBuilder();
499 if (deleteSB != null && deleteSB.length() > 0)
501 messageSB.append(deleteSB);
503 if (newerDeleteSB != null && newerDeleteSB.length() > 0)
505 messageSB.append("\n");
506 messageSB.append(newerDeleteSB);
509 int confirmButton = JvOptionPane.showConfirmDialog(Desktop.desktop,
510 messageSB.toString(),
512 .getString("label.backupfiles_confirm_delete"),
513 JvOptionPane.YES_NO_OPTION, JvOptionPane.WARNING_MESSAGE);
515 doDelete = (confirmButton == JvOptionPane.YES_OPTION);
524 for (int i = 0; i < deleteFiles.size(); i++)
526 File fileToDelete = deleteFiles.get(i).oldFile;
527 fileToDelete.delete();
528 // System.out.println("DELETING '" + fileToDelete.getName() +
538 private TreeMap<Integer, File> sortBackupFilesAsTreeMap(
542 // sort the backup files (based on integer found in the suffix) using a
543 // precomputed Hashmap for speed
544 Map<Integer, File> bfHashMap = new HashMap<>();
545 for (int i = 0; i < backupFiles.length; i++)
547 File f = backupFiles[i];
548 BackupFilenameParts bfp = new BackupFilenameParts(f, basename, suffix,
550 bfHashMap.put(bfp.indexNum(), f);
552 TreeMap<Integer, File> bfTreeMap = new TreeMap<>();
553 bfTreeMap.putAll(bfHashMap);
557 public boolean rollBackupsAndRenameTempFile()
559 boolean write = this.getWriteSuccess();
561 boolean roll = false;
562 boolean rename = false;
565 roll = this.rollBackupFiles(false);
566 rename = this.renameTempFile();
570 * Not sure that this confirmation is desirable. By this stage the new file is
571 * already written successfully, but something (e.g. disk full) has happened while
572 * trying to roll the backup files, and most likely the filename needed will already
573 * be vacant so renaming the temp file is nearly always correct!
575 boolean okay = roll && rename;
578 StringBuilder messageSB = new StringBuilder();
579 messageSB.append(MessageManager.getString( "label.backupfiles_confirm_save_file_backupfiles_roll_wrong"));
582 if (messageSB.length() > 0)
584 messageSB.append("\n");
586 messageSB.append(MessageManager.getString(
587 "label.backupfiles_confirm_save_new_saved_file_ok"));
591 if (messageSB.length() > 0)
593 messageSB.append("\n");
595 messageSB.append(MessageManager.getString(
596 "label.backupfiles_confirm_save_new_saved_file_not_ok"));
599 int confirmButton = JvOptionPane.showConfirmDialog(Desktop.desktop,
600 messageSB.toString(),
602 .getString("label.backupfiles_confirm_save_file"),
603 JvOptionPane.OK_OPTION, JvOptionPane.WARNING_MESSAGE);
604 okay = confirmButton == JvOptionPane.OK_OPTION;
614 public static TreeMap<Integer, File> getBackupFilesAsTreeMap(
615 String fileName, String suffix, int digits)
617 File[] backupFiles = null;
619 File file = new File(fileName);
624 dirFile = file.getParentFile();
625 } catch (Exception e)
628 "Could not get canonical path for file '" + file + "'");
629 return new TreeMap<>();
632 String filename = file.getName();
633 String basename = filename;
635 // find existing backup files
636 BackupFilenameFilter bff = new BackupFilenameFilter(basename, suffix,
638 backupFiles = dirFile.listFiles(bff); // is clone needed?
640 // sort the backup files (based on integer found in the suffix) using a
641 // precomputed Hashmap for speed
642 Map<Integer, File> bfHashMap = new HashMap<>();
643 for (int i = 0; i < backupFiles.length; i++)
645 File f = backupFiles[i];
646 BackupFilenameParts bfp = new BackupFilenameParts(f, basename, suffix,
648 bfHashMap.put(bfp.indexNum(), f);
650 TreeMap<Integer, File> bfTreeMap = new TreeMap<>();
651 bfTreeMap.putAll(bfHashMap);
656 private boolean addDeleteFile(File oldFile, File newFile, boolean delete,
657 boolean newer, String info)
660 int pos = deleteFiles.indexOf(oldFile);
663 DeleteFile df = deleteFiles.get(pos);
666 df.newFile = newFile;
670 df.info += ';' + info;
676 .add(new DeleteFile(oldFile, newFile, delete, newer, info));
681 private boolean hasNewerDeleteFile()
683 for (int i = 0; i < deleteFiles.size(); i++)
685 DeleteFile df = deleteFiles.get(i);
697 protected File oldFile;
699 protected File newFile;
701 protected boolean delete;
703 protected boolean newer;
705 protected String info;
707 protected DeleteFile(File oldFile, File newFile, boolean delete,
708 boolean newer, String info)
710 this.oldFile = oldFile;
711 this.newFile = newFile;
712 this.delete = delete;
717 public boolean equals(File file)
719 return this.oldFile.equals(file);