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

Example 1 with PositionAwarePhysicalFlushableChecksumChannel

use of org.neo4j.kernel.impl.transaction.log.PositionAwarePhysicalFlushableChecksumChannel 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 2 with PositionAwarePhysicalFlushableChecksumChannel

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

the class TransactionLogFile method start.

@Override
public void start() throws IOException {
    long currentLogVersion = logVersionRepository.getCurrentLogVersion();
    channel = createLogChannelForVersion(currentLogVersion, context::getLastCommittedTransactionId);
    context.getMonitors().newMonitor(LogRotationMonitor.class).started(channel.getPath(), currentLogVersion);
    // try to set position
    seekChannelPosition(currentLogVersion);
    writer = new PositionAwarePhysicalFlushableChecksumChannel(channel, new NativeScopedBuffer(calculateLogBufferSize(), memoryTracker));
    transactionLogWriter = new TransactionLogWriter(writer, new DbmsLogEntryWriterFactory(context.getKernelVersionProvider()));
}

Example 3 with PositionAwarePhysicalFlushableChecksumChannel

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

the class DetachedCheckpointAppender method start.

@Override
public void start() throws IOException {
    this.storeId = context.getStoreId();
    logVersionRepository = requireNonNull(context.getLogVersionRepository());
    long initialVersion = logVersionRepository.getCheckpointLogVersion();
    channel = channelAllocator.createLogChannel(initialVersion, context::getLastCommittedTransactionId);
    context.getMonitors().newMonitor(LogRotationMonitor.class).started(channel.getPath(), initialVersion);
    channel.position(channel.size());
    buffer = new NativeScopedBuffer(kibiBytes(1), context.getMemoryTracker());
    writer = new PositionAwarePhysicalFlushableChecksumChannel(channel, buffer);
    checkpointWriter = new DetachedCheckpointLogEntryWriter(writer);
}