/** * Returns the cached recent messages history. * * @return * @throws IOException */ private History getHistory() throws IOException { synchronized (historyID) { HistoryService historyService = MessageHistoryActivator.getMessageHistoryService().getHistoryService(); if (history == null) { history = historyService.createHistory(historyID, recordStructure); // lets check the version if not our version, re-create // history (delete it) HistoryReader reader = history.getReader(); boolean delete = false; QueryResultSet<HistoryRecord> res = reader.findLast(1); if (res != null && res.hasNext()) { HistoryRecord hr = res.next(); if (hr.getPropertyValues().length >= 4) { if (!hr.getPropertyValues()[3].equals(RECENT_MSGS_VER)) delete = true; } else delete = true; } if (delete) { // delete it try { historyService.purgeLocallyStoredHistory(historyID); history = historyService.createHistory(historyID, recordStructure); } catch (IOException ex) { logger.error("Cannot delete recent_messages history", ex); } } } return history; } }
/** * Searches for contact ids in history of recent messages. * * @param provider * @param after * @return */ List<String> getRecentContactIDs(String provider, Date after) { List<String> res = new ArrayList<String>(); try { History history = getHistory(); if (history != null) { Iterator<HistoryRecord> recs = history.getReader().findLast(NUMBER_OF_MSGS_IN_HISTORY); SimpleDateFormat sdf = new SimpleDateFormat(HistoryService.DATE_FORMAT); while (recs.hasNext()) { HistoryRecord hr = recs.next(); String contact = null; String recordProvider = null; Date timestamp = null; for (int i = 0; i < hr.getPropertyNames().length; i++) { String propName = hr.getPropertyNames()[i]; if (propName.equals(STRUCTURE_NAMES[0])) recordProvider = hr.getPropertyValues()[i]; else if (propName.equals(STRUCTURE_NAMES[1])) contact = hr.getPropertyValues()[i]; else if (propName.equals(STRUCTURE_NAMES[2])) { try { timestamp = sdf.parse(hr.getPropertyValues()[i]); } catch (ParseException e) { timestamp = new Date(Long.parseLong(hr.getPropertyValues()[i])); } } } if (recordProvider == null || contact == null) continue; if (after != null && timestamp != null && timestamp.before(after)) continue; if (recordProvider.equals(provider)) res.add(contact); } } } catch (IOException ex) { logger.error("cannot create recent_messages history", ex); } return res; }