Examples with RecordIterator org.apache.jackrabbit.core.journal.RecordIterator used on opensource projects

Example 1 with RecordIterator

use of org.apache.jackrabbit.core.journal.RecordIterator in project jackrabbit by apache.

the class SearchIndex method getChangeLogRecords.

/**
     * Polls the underlying journal for events of the type ChangeLogRecord that
     * happened after a given revision, on a given workspace.
     *
     * @param revision
     *            starting revision
     * @param workspace
     *            the workspace name
     * @return
     */
private List<ChangeLogRecord> getChangeLogRecords(long revision, final String workspace) {
    log.debug("Get changes from the Journal for revision {} and workspace {}.", revision, workspace);
    ClusterNode cn = getContext().getClusterNode();
    if (cn == null) {
        return Collections.emptyList();
    }
    Journal journal = cn.getJournal();
    final List<ChangeLogRecord> events = new ArrayList<ChangeLogRecord>();
    ClusterRecordDeserializer deserializer = new ClusterRecordDeserializer();
    RecordIterator records = null;
    try {
        records = journal.getRecords(revision);
        while (records.hasNext()) {
            Record record = records.nextRecord();
            if (!record.getProducerId().equals(cn.getId())) {
                continue;
            }
            ClusterRecord r = null;
            try {
                r = deserializer.deserialize(record);
            } catch (JournalException e) {
                log.error("Unable to read revision '" + record.getRevision() + "'.", e);
            }
            if (r == null) {
                continue;
            }
            r.process(new ClusterRecordProcessor() {

                public void process(ChangeLogRecord record) {
                    String eventW = record.getWorkspace();
                    if (eventW != null ? eventW.equals(workspace) : workspace == null) {
                        events.add(record);
                    }
                }

                public void process(LockRecord record) {
                }

                public void process(NamespaceRecord record) {
                }

                public void process(NodeTypeRecord record) {
                }

                public void process(PrivilegeRecord record) {
                }

                public void process(WorkspaceRecord record) {
                }
            });
        }
    } catch (JournalException e1) {
        log.error(e1.getMessage(), e1);
    } finally {
        if (records != null) {
            records.close();
        }
    }
    return events;
}

Example 2 with RecordIterator

use of org.apache.jackrabbit.core.journal.RecordIterator in project jackrabbit by apache.

the class EventJournalImpl method refill.

/**
     * Refills the {@link #eventBundleBuffer}.
     */
private void refill() {
    assert eventBundleBuffer.isEmpty();
    try {
        RecordProcessor processor = new RecordProcessor();
        ClusterRecordDeserializer deserializer = new ClusterRecordDeserializer();
        RecordIterator records;
        if (lastRevision != null) {
            log.debug("refilling event bundle buffer starting at revision {}", lastRevision);
            records = journal.getRecords(lastRevision.longValue());
        } else {
            log.debug("refilling event bundle buffer starting at journal beginning");
            records = journal.getRecords();
        }
        try {
            while (processor.getNumEvents() < MIN_BUFFER_SIZE && records.hasNext()) {
                Record record = records.nextRecord();
                if (record.getProducerId().equals(producerId)) {
                    ClusterRecord cr = deserializer.deserialize(record);
                    if (!session.getWorkspace().getName().equals(cr.getWorkspace())) {
                        continue;
                    }
                    cr.process(processor);
                    lastRevision = new Long(cr.getRevision());
                }
            }
            if (processor.getNumEvents() >= MIN_BUFFER_SIZE) {
                // remember in skip map
                SortedMap<Long, Long> skipMap = getSkipMap();
                Long timestamp = new Long(processor.getLastTimestamp());
                synchronized (skipMap) {
                    if (log.isDebugEnabled()) {
                        DateFormat df = DateFormat.getDateTimeInstance();
                        log.debug("remember record in skip map: {} -> {}", df.format(new Date(timestamp.longValue())), lastRevision);
                    }
                    skipMap.put(timestamp, lastRevision);
                }
            }
        } finally {
            records.close();
        }
    } catch (JournalException e) {
        log.warn("Unable to read journal records", e);
    }
}