Examples with LogEntryStart org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart used on opensource projects

Example 1 with LogEntryStart

use of org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart in project neo4j by neo4j.

the class LegacyLogEntryWriterTest method shouldWriteAllTheEntryInACommitToTheFile.

@Test
public void shouldWriteAllTheEntryInACommitToTheFile() throws IOException {
    // given
    final LogVersionedStoreChannel channel = mock(LogVersionedStoreChannel.class);
    final LogEntryWriter logEntryWriter = mock(LogEntryWriter.class);
    final LegacyLogEntryWriter writer = new LegacyLogEntryWriter(fs, liftToFactory(logEntryWriter));
    final LogEntryStart start = new LogEntryStart(0, 1, 2L, 3L, EMPTY_ADDITIONAL_ARRAY, UNSPECIFIED);
    final LogEntryCommand command = new LogEntryCommand(new Command.NodeCommand(nodeRecord, nodeRecord));
    final LogEntryCommit commit = new OnePhaseCommit(42L, 43L);
    // when
    final IOCursor<LogEntry> cursor = mockCursor(start, command, commit);
    writer.writeAllLogEntries(channel, cursor);
    // then
    verify(logEntryWriter, times(1)).writeStartEntry(0, 1, 2L, 3L, EMPTY_ADDITIONAL_ARRAY);
    final TransactionRepresentation expected = new PhysicalTransactionRepresentation(Arrays.asList(command.getXaCommand()));
    verify(logEntryWriter, times(1)).serialize(eq(expected));
    verify(logEntryWriter, times(1)).writeCommitEntry(42L, 43L);
}

Example 2 with LogEntryStart

use of org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart in project neo4j by neo4j.

the class IndexCreationTest method verifyThatIndexCreationTransactionIsTheFirstOne.

private void verifyThatIndexCreationTransactionIsTheFirstOne() throws Exception {
    PhysicalLogFile pLogFile = db.getDependencyResolver().resolveDependency(PhysicalLogFile.class);
    long version = db.getDependencyResolver().resolveDependency(LogVersionRepository.class).getCurrentLogVersion();
    db.getDependencyResolver().resolveDependency(LogRotation.class).rotateLogFile();
    db.getDependencyResolver().resolveDependency(CheckPointer.class).forceCheckPoint(new SimpleTriggerInfo("test"));
    ReadableLogChannel logChannel = pLogFile.getReader(LogPosition.start(version));
    final AtomicBoolean success = new AtomicBoolean(false);
    try (IOCursor<LogEntry> cursor = new LogEntryCursor(new VersionAwareLogEntryReader<>(), logChannel)) {
        List<StorageCommand> commandsInFirstEntry = new ArrayList<>();
        boolean startFound = false;
        while (cursor.next()) {
            LogEntry entry = cursor.get();
            if (entry instanceof LogEntryStart) {
                if (startFound) {
                    throw new IllegalArgumentException("More than one start entry");
                }
                startFound = true;
            }
            if (startFound && entry instanceof LogEntryCommand) {
                commandsInFirstEntry.add(entry.<LogEntryCommand>as().getXaCommand());
            }
            if (entry instanceof LogEntryCommit) {
                // The first COMMIT
                assertTrue(startFound);
                assertFalse("Index creation transaction wasn't the first one", commandsInFirstEntry.isEmpty());
                List<StorageCommand> createCommands = Iterators.asList(new FilteringIterator<>(commandsInFirstEntry.iterator(), item -> item instanceof IndexDefineCommand));
                assertEquals(1, createCommands.size());
                success.set(true);
                break;
            }
        }
    }
    assertTrue("Didn't find any commit record in log " + version, success.get());
}

Example 3 with LogEntryStart

use of org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart in project neo4j by neo4j.

the class NeoStoreDataSource method buildTransactionLogs.

private NeoStoreTransactionLogModule buildTransactionLogs(File storeDir, Config config, LogProvider logProvider, JobScheduler scheduler, FileSystemAbstraction fileSystemAbstraction, StorageEngine storageEngine, LogEntryReader<ReadableClosablePositionAwareChannel> logEntryReader, SynchronizedArrayIdOrderingQueue legacyIndexTransactionOrdering, TransactionIdStore transactionIdStore, LogVersionRepository logVersionRepository) {
    TransactionMetadataCache transactionMetadataCache = new TransactionMetadataCache(100_000);
    LogHeaderCache logHeaderCache = new LogHeaderCache(1000);
    final PhysicalLogFiles logFiles = new PhysicalLogFiles(storeDir, PhysicalLogFile.DEFAULT_NAME, fileSystemAbstraction);
    final PhysicalLogFile logFile = life.add(new PhysicalLogFile(fileSystemAbstraction, logFiles, config.get(GraphDatabaseSettings.logical_log_rotation_threshold), transactionIdStore::getLastCommittedTransactionId, logVersionRepository, physicalLogMonitor, logHeaderCache));
    final PhysicalLogFileInformation.LogVersionToTimestamp logInformation = version -> {
        LogPosition position = LogPosition.start(version);
        try (ReadableLogChannel channel = logFile.getReader(position)) {
            LogEntry entry;
            while ((entry = logEntryReader.readLogEntry(channel)) != null) {
                if (entry instanceof LogEntryStart) {
                    return entry.<LogEntryStart>as().getTimeWritten();
                }
            }
        }
        return -1;
    };
    final LogFileInformation logFileInformation = new PhysicalLogFileInformation(logFiles, logHeaderCache, transactionIdStore::getLastCommittedTransactionId, logInformation);
    if (config.get(GraphDatabaseFacadeFactory.Configuration.ephemeral)) {
        config = config.withDefaults(stringMap(GraphDatabaseSettings.keep_logical_logs.name(), "1 files"));
    }
    String pruningConf = config.get(GraphDatabaseSettings.keep_logical_logs);
    LogPruneStrategy logPruneStrategy = fromConfigValue(fs, logFileInformation, logFiles, pruningConf);
    final LogPruning logPruning = new LogPruningImpl(logPruneStrategy, logProvider);
    final LogRotation logRotation = new LogRotationImpl(monitors.newMonitor(LogRotation.Monitor.class), logFile, databaseHealth);
    final TransactionAppender appender = life.add(new BatchingTransactionAppender(logFile, logRotation, transactionMetadataCache, transactionIdStore, legacyIndexTransactionOrdering, databaseHealth));
    final LogicalTransactionStore logicalTransactionStore = new PhysicalLogicalTransactionStore(logFile, transactionMetadataCache, logEntryReader);
    int txThreshold = config.get(GraphDatabaseSettings.check_point_interval_tx);
    final CountCommittedTransactionThreshold countCommittedTransactionThreshold = new CountCommittedTransactionThreshold(txThreshold);
    long timeMillisThreshold = config.get(GraphDatabaseSettings.check_point_interval_time);
    TimeCheckPointThreshold timeCheckPointThreshold = new TimeCheckPointThreshold(timeMillisThreshold, clock);
    CheckPointThreshold threshold = CheckPointThresholds.or(countCommittedTransactionThreshold, timeCheckPointThreshold);
    final CheckPointerImpl checkPointer = new CheckPointerImpl(transactionIdStore, threshold, storageEngine, logPruning, appender, databaseHealth, logProvider, tracers.checkPointTracer, ioLimiter, storeCopyCheckPointMutex);
    long recurringPeriod = Math.min(timeMillisThreshold, TimeUnit.SECONDS.toMillis(10));
    CheckPointScheduler checkPointScheduler = new CheckPointScheduler(checkPointer, scheduler, recurringPeriod, databaseHealth);
    life.add(checkPointer);
    life.add(checkPointScheduler);
    return new NeoStoreTransactionLogModule(logicalTransactionStore, logFileInformation, logFiles, logFile, logRotation, checkPointer, appender, legacyIndexTransactionOrdering);
}

Example 4 with LogEntryStart

use of org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart in project neo4j by neo4j.

the class LatestCheckPointFinder method find.

public LatestCheckPoint find(long fromVersionBackwards) throws IOException {
    long version = fromVersionBackwards;
    long versionToSearchForCommits = fromVersionBackwards;
    LogEntryStart latestStartEntry = null;
    LogEntryStart oldestStartEntry = null;
    long oldestVersionFound = -1;
    while (version >= INITIAL_LOG_VERSION) {
        LogVersionedStoreChannel channel = PhysicalLogFile.tryOpenForVersion(logFiles, fileSystem, version, false);
        if (channel == null) {
            break;
        }
        oldestVersionFound = version;
        CheckPoint latestCheckPoint = null;
        ReadableLogChannel recoveredDataChannel = new ReadAheadLogChannel(channel, NO_MORE_CHANNELS);
        boolean firstStartEntry = true;
        try (LogEntryCursor cursor = new LogEntryCursor(logEntryReader, recoveredDataChannel)) {
            LogEntry entry;
            while (cursor.next()) {
                entry = cursor.get();
                if (entry instanceof CheckPoint) {
                    latestCheckPoint = entry.as();
                }
                if (entry instanceof LogEntryStart) {
                    LogEntryStart startEntry = entry.as();
                    if (version == versionToSearchForCommits) {
                        latestStartEntry = startEntry;
                    }
                    // Oldest start entry will be the first in the last log version scanned.
                    if (firstStartEntry) {
                        oldestStartEntry = startEntry;
                        firstStartEntry = false;
                    }
                }
            }
        }
        if (latestCheckPoint != null) {
            return latestCheckPoint(fromVersionBackwards, version, latestStartEntry, oldestVersionFound, latestCheckPoint);
        }
        version--;
        // if we have found no commits in the latest log, keep searching in the next one
        if (latestStartEntry == null) {
            versionToSearchForCommits--;
        }
    }
    boolean commitsAfterCheckPoint = oldestStartEntry != null;
    long firstTxAfterPosition = commitsAfterCheckPoint ? extractFirstTxIdAfterPosition(oldestStartEntry.getStartPosition(), fromVersionBackwards) : LatestCheckPoint.NO_TRANSACTION_ID;
    return new LatestCheckPoint(null, commitsAfterCheckPoint, firstTxAfterPosition, oldestVersionFound);
}

Example 5 with LogEntryStart

use of org.neo4j.kernel.impl.transaction.log.entry.LogEntryStart in project neo4j by neo4j.

the class TxPullResponseEncodeDecodeTest method newCommittedTransactionRepresentation.

private CommittedTransactionRepresentation newCommittedTransactionRepresentation() {
    final long arbitraryRecordId = 27L;
    Command.NodeCommand command = new Command.NodeCommand(new NodeRecord(arbitraryRecordId), new NodeRecord(arbitraryRecordId));
    PhysicalTransactionRepresentation physicalTransactionRepresentation = new PhysicalTransactionRepresentation(asList(new LogEntryCommand(command).getXaCommand()));
    physicalTransactionRepresentation.setHeader(new byte[] {}, 0, 0, 0, 0, 0, 0);
    LogEntryStart startEntry = new LogEntryStart(0, 0, 0L, 0L, new byte[] {}, LogPosition.UNSPECIFIED);
    OnePhaseCommit commitEntry = new OnePhaseCommit(42, 0);
    return new CommittedTransactionRepresentation(startEntry, physicalTransactionRepresentation, commitEntry);
}