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

Example 16 with LogPositionMarker

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

the class LogPositionMarkerTest method shouldReturnTheMarkedPosition.

@Test
void shouldReturnTheMarkedPosition() {
    // given
    final LogPositionMarker marker = new LogPositionMarker();
    // when
    marker.mark(1, 2);
    final LogPosition logPosition = marker.newPosition();
    // given
    assertEquals(new LogPosition(1, 2), logPosition);
}

Example 17 with LogPositionMarker

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

the class TransactionLogsRecoveryTest method shouldRecoverExistingData.

@Test
void shouldRecoverExistingData() throws Exception {
    LogFile logFile = logFiles.getLogFile();
    Path file = logFile.getLogFileForVersion(logVersion);
    writeSomeData(file, pair -> {
        LogEntryWriter writer = pair.first();
        Consumer<LogPositionMarker> consumer = pair.other();
        LogPositionMarker marker = new LogPositionMarker();
        // last committed tx
        int previousChecksum = BASE_TX_CHECKSUM;
        consumer.accept(marker);
        LogPosition lastCommittedTxPosition = marker.newPosition();
        writer.writeStartEntry(2L, 3L, previousChecksum, new byte[0]);
        lastCommittedTxStartEntry = new LogEntryStart(2L, 3L, previousChecksum, new byte[0], lastCommittedTxPosition);
        previousChecksum = writer.writeCommitEntry(4L, 5L);
        lastCommittedTxCommitEntry = new LogEntryCommit(4L, 5L, previousChecksum);
        // check point pointing to the previously committed transaction
        var checkpointFile = logFiles.getCheckpointFile();
        var checkpointAppender = checkpointFile.getCheckpointAppender();
        checkpointAppender.checkPoint(LogCheckPointEvent.NULL, lastCommittedTxPosition, Instant.now(), "test");
        // tx committed after checkpoint
        consumer.accept(marker);
        writer.writeStartEntry(6L, 4L, previousChecksum, new byte[0]);
        expectedStartEntry = new LogEntryStart(6L, 4L, previousChecksum, new byte[0], marker.newPosition());
        previousChecksum = writer.writeCommitEntry(5L, 7L);
        expectedCommitEntry = new LogEntryCommit(5L, 7L, previousChecksum);
        return true;
    });
    LifeSupport life = new LifeSupport();
    var recoveryRequired = new AtomicBoolean();
    var recoveredTransactions = new MutableInt();
    RecoveryMonitor monitor = new RecoveryMonitor() {

        @Override
        public void recoveryRequired(LogPosition recoveryPosition) {
            recoveryRequired.set(true);
        }

        @Override
        public void recoveryCompleted(int numberOfRecoveredTransactions, long recoveryTimeInMilliseconds) {
            recoveredTransactions.setValue(numberOfRecoveredTransactions);
        }
    };
    try {
        StorageEngine storageEngine = mock(StorageEngine.class);
        final LogEntryReader reader = logEntryReader();
        TransactionMetadataCache metadataCache = new TransactionMetadataCache();
        LogicalTransactionStore txStore = new PhysicalLogicalTransactionStore(logFiles, metadataCache, reader, monitors, false);
        CorruptedLogsTruncator logPruner = new CorruptedLogsTruncator(storeDir, logFiles, fileSystem, INSTANCE);
        monitors.addMonitorListener(monitor);
        life.add(new TransactionLogsRecovery(new DefaultRecoveryService(storageEngine, transactionIdStore, txStore, versionRepository, logFiles, NO_MONITOR, mock(Log.class), false) {

            private int nr;

            @Override
            public RecoveryApplier getRecoveryApplier(TransactionApplicationMode mode, PageCacheTracer cacheTracer, String tracerTag) {
                RecoveryApplier actual = super.getRecoveryApplier(mode, cacheTracer, tracerTag);
                if (mode == TransactionApplicationMode.REVERSE_RECOVERY) {
                    return actual;
                }
                return new RecoveryApplier() {

                    @Override
                    public void close() throws Exception {
                        actual.close();
                    }

                    @Override
                    public boolean visit(CommittedTransactionRepresentation tx) throws Exception {
                        actual.visit(tx);
                        switch(nr++) {
                            case 0:
                                assertEquals(lastCommittedTxStartEntry, tx.getStartEntry());
                                assertEquals(lastCommittedTxCommitEntry, tx.getCommitEntry());
                                break;
                            case 1:
                                assertEquals(expectedStartEntry, tx.getStartEntry());
                                assertEquals(expectedCommitEntry, tx.getCommitEntry());
                                break;
                            default:
                                fail("Too many recovered transactions");
                        }
                        return false;
                    }
                };
            }
        }, logPruner, schemaLife, monitor, ProgressReporter.SILENT, false, EMPTY_CHECKER, NULL));
        life.start();
        assertTrue(recoveryRequired.get());
        assertEquals(2, recoveredTransactions.getValue());
    } finally {
        life.shutdown();
    }
}

Example 18 with LogPositionMarker

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

the class TransactionLogsRecoveryTest method writeSomeDataWithVersion.

private void writeSomeDataWithVersion(Path file, Visitor<Pair<LogEntryWriter, Consumer<LogPositionMarker>>, IOException> visitor, KernelVersion version) throws IOException {
    try (LogVersionedStoreChannel versionedStoreChannel = new PhysicalLogVersionedStoreChannel(fileSystem.write(file), logVersion, CURRENT_LOG_FORMAT_VERSION, file, EMPTY_ACCESSOR);
        PositionAwarePhysicalFlushableChecksumChannel writableLogChannel = new PositionAwarePhysicalFlushableChecksumChannel(versionedStoreChannel, new HeapScopedBuffer(1, KibiByte, INSTANCE))) {
        writeLogHeader(writableLogChannel, new LogHeader(logVersion, 2L, StoreId.UNKNOWN));
        writableLogChannel.beginChecksum();
        Consumer<LogPositionMarker> consumer = marker -> {
            try {
                writableLogChannel.getCurrentPosition(marker);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        };
        LogEntryWriter first = new LogEntryWriter(writableLogChannel, version);
        visitor.visit(Pair.of(first, consumer));
    }
}

Example 19 with LogPositionMarker

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

the class TransactionLogsRecoveryTest method shouldSeeThatACleanDatabaseShouldNotRequireRecovery.

@ParameterizedTest(name = "{0}")
@CsvSource({ "separateCheckpoints,true", "legacyCheckpoints,false" })
void shouldSeeThatACleanDatabaseShouldNotRequireRecovery(String name, boolean useSeparateLogFiles) throws Exception {
    Path file = logFiles.getLogFile().getLogFileForVersion(logVersion);
    LogPositionMarker marker = new LogPositionMarker();
    writeSomeDataWithVersion(file, pair -> {
        LogEntryWriter writer = pair.first();
        Consumer<LogPositionMarker> consumer = pair.other();
        // last committed tx
        consumer.accept(marker);
        writer.writeStartEntry(2L, 3L, BASE_TX_CHECKSUM, new byte[0]);
        writer.writeCommitEntry(4L, 5L);
        // check point
        consumer.accept(marker);
        if (useSeparateLogFiles) {
            var checkpointFile = logFiles.getCheckpointFile();
            var checkpointAppender = checkpointFile.getCheckpointAppender();
            checkpointAppender.checkPoint(LogCheckPointEvent.NULL, marker.newPosition(), Instant.now(), "test");
        } else {
            writer.writeLegacyCheckPointEntry(marker.newPosition());
        }
        return true;
    }, useSeparateLogFiles ? KernelVersion.LATEST : KernelVersion.V4_0);
    LifeSupport life = new LifeSupport();
    RecoveryMonitor monitor = mock(RecoveryMonitor.class);
    try {
        StorageEngine storageEngine = mock(StorageEngine.class);
        final LogEntryReader reader = logEntryReader();
        TransactionMetadataCache metadataCache = new TransactionMetadataCache();
        LogicalTransactionStore txStore = new PhysicalLogicalTransactionStore(logFiles, metadataCache, reader, monitors, false);
        CorruptedLogsTruncator logPruner = new CorruptedLogsTruncator(storeDir, logFiles, fileSystem, INSTANCE);
        monitors.addMonitorListener(new RecoveryMonitor() {

            @Override
            public void recoveryRequired(LogPosition recoveryPosition) {
                fail("Recovery should not be required");
            }
        });
        life.add(new TransactionLogsRecovery(new DefaultRecoveryService(storageEngine, transactionIdStore, txStore, versionRepository, logFiles, NO_MONITOR, mock(Log.class), false), logPruner, schemaLife, monitor, ProgressReporter.SILENT, false, EMPTY_CHECKER, NULL));
        life.start();
        verifyNoInteractions(monitor);
    } finally {
        life.shutdown();
    }
}

Example 20 with LogPositionMarker

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

the class TransactionLogsRecoveryTest method shouldTruncateLogAfterLastCompleteTransactionAfterSuccessfulRecovery.

@Test
void shouldTruncateLogAfterLastCompleteTransactionAfterSuccessfulRecovery() throws Exception {
    // GIVEN
    Path file = logFiles.getLogFile().getLogFileForVersion(logVersion);
    final LogPositionMarker marker = new LogPositionMarker();
    writeSomeData(file, pair -> {
        LogEntryWriter writer = pair.first();
        Consumer<LogPositionMarker> consumer = pair.other();
        // last committed tx
        int previousChecksum = BASE_TX_CHECKSUM;
        writer.writeStartEntry(2L, 3L, previousChecksum, new byte[0]);
        previousChecksum = writer.writeCommitEntry(4L, 5L);
        // incomplete tx
        // <-- marker has the last good position
        consumer.accept(marker);
        writer.writeStartEntry(5L, 4L, previousChecksum, new byte[0]);
        return true;
    });
    // WHEN
    boolean recoveryRequired = recover(storeDir, logFiles);
    // THEN
    assertTrue(recoveryRequired);
    assertEquals(marker.getByteOffset(), Files.size(file));
}