Examples of org.apache.activeio.journal.active.JournalImpl

Package org.apache.activeio.journal.active

Examples of org.apache.activeio.journal.active.JournalImpl

org.apache.activeio.journal.active.JournalImpl
objectweb.org/">Howl project but tailored to the needs of ActiveMQ.
This Journal provides the following features:
- Concurrent writes are batched into a single write/force done by a background thread.
- Uses preallocated logs to avoid disk fragmentation and performance degregation.
- The number and size of the preallocated logs are configurable.
- Uses direct ByteBuffers to write data to log files.
- Allows logs to grow in case of an overflow condition so that overflow exceptions are not not thrown. Grown logs that are inactivate (due to a new mark) are resized to their original size.
- No limit on the size of the record written to the journal
- Should be possible to extend so that multiple physical disk are used concurrently to increase throughput and decrease latency.
@version $Revision: 1.1 $


    protected void configureBroker(BrokerService answer) throws Exception {


        File dataFileDir = new File("target/test-amq-data/perfTest");
        File journalDir = new File(dataFileDir, "journal").getCanonicalFile();
        JournalImpl journal = new JournalImpl(journalDir, 3, 1024 * 1024 * 20);


        KahaPersistenceAdapter kahaAdaptor = new KahaPersistenceAdapter();
        JournalPersistenceAdapter journalAdaptor = new JournalPersistenceAdapter(journal, kahaAdaptor, answer.getTaskRunnerFactory());
        journalAdaptor.setMaxCheckpointWorkers(1);

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     * @throws IOException
     */
    protected void createJournal() throws IOException {
        File journalDir = new File(getDataDirectoryFile(), "journal").getCanonicalFile();
        if (failIfJournalIsLocked) {
            journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                      getJournalArchiveDirectory());
        } else {
            while (true) {
                try {
                    journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                              getJournalArchiveDirectory());
                    break;
                } catch (JournalLockedException e) {
                    LOG.info("Journal is locked... waiting " + (JOURNAL_LOCKED_WAIT_DELAY / 1000)
                             + " seconds for the journal to be unlocked.");

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     * @throws IOException
     */
    protected void createJournal() throws IOException {
        File journalDir = new File(getDataDirectoryFile(), "journal").getCanonicalFile();
        if (failIfJournalIsLocked) {
            journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                      getJournalArchiveDirectory());
        } else {
            while (true) {
                try {
                    journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                              getJournalArchiveDirectory());
                    break;
                } catch (JournalLockedException e) {
                    LOG.info("Journal is locked... waiting " + (JOURNAL_LOCKED_WAIT_DELAY / 1000)
                             + " seconds for the journal to be unlocked.");

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    protected void configureBroker(BrokerService answer,String uri) throws Exception {


        File dataFileDir = new File("target/test-amq-data/perfTest");
        File journalDir = new File(dataFileDir, "journal").getCanonicalFile();
        JournalImpl journal = new JournalImpl(journalDir, 3, 1024 * 1024 * 20);


        KahaPersistenceAdapter kahaAdaptor = new KahaPersistenceAdapter();
        JournalPersistenceAdapter journalAdaptor = new JournalPersistenceAdapter(journal, kahaAdaptor, answer.getTaskRunnerFactory());
        journalAdaptor.setMaxCheckpointWorkers(1);

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    protected void configureBroker(BrokerService answer,String uri) throws Exception {


        File dataFileDir = new File("target/test-amq-data/perfTest");
        File journalDir = new File(dataFileDir, "journal").getCanonicalFile();
        JournalImpl journal = new JournalImpl(journalDir, 3, 1024 * 1024 * 20);


        KahaPersistenceAdapter kahaAdaptor = new KahaPersistenceAdapter();
        JournalPersistenceAdapter journalAdaptor = new JournalPersistenceAdapter(journal, kahaAdaptor, answer.getTaskRunnerFactory());
        journalAdaptor.setMaxCheckpointWorkers(1);

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     * @throws IOException
     */
    protected void createJournal() throws IOException {
        File journalDir = new File(getDataDirectoryFile(), "journal").getCanonicalFile();
        if (failIfJournalIsLocked) {
            journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                      getJournalArchiveDirectory());
        } else {
            while (true) {
                try {
                    journal = new JournalImpl(journalDir, journalLogFiles, journalLogFileSize,
                                              getJournalArchiveDirectory());
                    break;
                } catch (JournalLockedException e) {
                    LOG.info("Journal is locked... waiting " + (JOURNAL_LOCKED_WAIT_DELAY / 1000)
                             + " seconds for the journal to be unlocked.");

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