Examples with TableCheckpoint herddb.core.AbstractTableManager.TableCheckpoint used on opensource projects

Example 1 with TableCheckpoint

use of herddb.core.AbstractTableManager.TableCheckpoint in project herddb by diennea.

the class TableSpaceManager method checkpoint.

TableSpaceCheckpoint checkpoint(boolean full, boolean pin) throws DataStorageManagerException, LogNotAvailableException {
    if (virtual) {
        return null;
    }
    long _start = System.currentTimeMillis();
    LogSequenceNumber logSequenceNumber;
    LogSequenceNumber _logSequenceNumber;
    List<PostCheckpointAction> actions = new ArrayList<>();
    Map<String, LogSequenceNumber> checkpoints = new HashMap<>();
    generalLock.writeLock().lock();
    try {
        logSequenceNumber = log.getLastSequenceNumber();
        if (logSequenceNumber.isStartOfTime()) {
            LOGGER.log(Level.INFO, nodeId + " checkpoint " + tableSpaceName + " at " + logSequenceNumber + ". skipped (no write ever issued to log)");
            return new TableSpaceCheckpoint(logSequenceNumber, checkpoints);
        }
        LOGGER.log(Level.INFO, nodeId + " checkpoint start " + tableSpaceName + " at " + logSequenceNumber);
        if (actualLogSequenceNumber == null) {
            throw new DataStorageManagerException("actualLogSequenceNumber cannot be null");
        }
        // TODO: transactions checkpoint is not atomic
        actions.addAll(dataStorageManager.writeTransactionsAtCheckpoint(tableSpaceUUID, logSequenceNumber, new ArrayList<>(transactions.values())));
        actions.addAll(writeTablesOnDataStorageManager(new CommitLogResult(logSequenceNumber, false)));
        // we checkpoint all data to disk and save the actual log sequence number
        for (AbstractTableManager tableManager : tables.values()) {
            if (!tableManager.isSystemTable()) {
                TableCheckpoint checkpoint = full ? tableManager.fullCheckpoint(pin) : tableManager.checkpoint(pin);
                if (checkpoint != null) {
                    actions.addAll(checkpoint.actions);
                    checkpoints.put(checkpoint.tableName, checkpoint.sequenceNumber);
                    if (afterTableCheckPointAction != null) {
                        afterTableCheckPointAction.run();
                    }
                }
            }
        }
        // we are sure that all data as been flushed. upon recovery we will replay the log starting from this position
        actions.addAll(dataStorageManager.writeCheckpointSequenceNumber(tableSpaceUUID, logSequenceNumber));
        /* Indexes checkpoint is handled by TableManagers */
        log.dropOldLedgers(logSequenceNumber);
        _logSequenceNumber = log.getLastSequenceNumber();
    } finally {
        generalLock.writeLock().unlock();
    }
    for (PostCheckpointAction action : actions) {
        try {
            action.run();
        } catch (Exception error) {
            LOGGER.log(Level.SEVERE, "postcheckpoint error:" + error, error);
        }
    }
    long _stop = System.currentTimeMillis();
    LOGGER.log(Level.INFO, "{0} checkpoint finish {1} started ad {2}, finished at {3}, total time {4} ms", new Object[] { nodeId, tableSpaceName, logSequenceNumber, _logSequenceNumber, Long.toString(_stop - _start) });
    return new TableSpaceCheckpoint(logSequenceNumber, checkpoints);
}