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

Example 11 with TransactionIdStore

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

the class NoChangeWriteTransactionTest method shouldDetectNoChangesInCommitsAlsoForTheIndexes.

@Test
public void shouldDetectNoChangesInCommitsAlsoForTheIndexes() throws Exception {
    // GIVEN a transaction that has seen some changes, where all those changes result in a net 0 change set
    // a good way of producing such state is to add a label to an existing node, and then remove it.
    GraphDatabaseAPI db = dbr.getGraphDatabaseAPI();
    TransactionIdStore txIdStore = db.getDependencyResolver().resolveDependency(TransactionIdStore.class);
    long startTxId = txIdStore.getLastCommittedTransactionId();
    Node node = createEmptyNode(db);
    Index<Node> index = createNodeIndex(db);
    try (Transaction tx = db.beginTx()) {
        node.addLabel(TestLabels.LABEL_ONE);
        node.removeLabel(TestLabels.LABEL_ONE);
        index.add(node, "key", "value");
        index.remove(node, "key", "value");
        tx.success();
    }
    // WHEN closing that transaction
    // THEN it should not have been committed
    assertEquals("Expected last txId to be what it started at + 3 " + "(1 for the empty node, 1 for index, and one for the label)", startTxId + 3, txIdStore.getLastCommittedTransactionId());
}

Example 12 with TransactionIdStore

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

the class NoChangeWriteTransactionTest method shouldIdentifyTransactionWithNetZeroChangesAsReadOnly.

@Test
public void shouldIdentifyTransactionWithNetZeroChangesAsReadOnly() throws Exception {
    // GIVEN a transaction that has seen some changes, where all those changes result in a net 0 change set
    // a good way of producing such state is to add a label to an existing node, and then remove it.
    GraphDatabaseAPI db = dbr.getGraphDatabaseAPI();
    TransactionIdStore txIdStore = db.getDependencyResolver().resolveDependency(TransactionIdStore.class);
    long startTxId = txIdStore.getLastCommittedTransactionId();
    Node node = createEmptyNode(db);
    try (Transaction tx = db.beginTx()) {
        node.addLabel(TestLabels.LABEL_ONE);
        node.removeLabel(TestLabels.LABEL_ONE);
        tx.success();
    }
    // WHEN closing that transaction
    // THEN it should not have been committed
    assertEquals("Expected last txId to be what it started at + 2 (1 for the empty node, and one for the label)", startTxId + 2, txIdStore.getLastCommittedTransactionId());
}

Example 13 with TransactionIdStore

use of org.neo4j.kernel.impl.transaction.log.TransactionIdStore 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 14 with TransactionIdStore

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

the class Runner method call.

@Override
public Long call() throws Exception {
    long lastCommittedTransactionId;
    try (FileSystemAbstraction fileSystem = new DefaultFileSystemAbstraction();
        Lifespan life = new Lifespan()) {
        TransactionIdStore transactionIdStore = new DeadSimpleTransactionIdStore();
        TransactionMetadataCache transactionMetadataCache = new TransactionMetadataCache(100_000);
        LogHeaderCache logHeaderCache = new LogHeaderCache(1000);
        LogFile logFile = life.add(createPhysicalLogFile(transactionIdStore, logHeaderCache, fileSystem));
        TransactionAppender transactionAppender = life.add(createBatchingTransactionAppender(transactionIdStore, transactionMetadataCache, logFile));
        ExecutorService executorService = Executors.newFixedThreadPool(threads);
        try {
            Future<?>[] handlers = new Future[threads];
            for (int i = 0; i < threads; i++) {
                TransactionRepresentationFactory factory = new TransactionRepresentationFactory();
                Worker task = new Worker(transactionAppender, factory, condition);
                handlers[i] = executorService.submit(task);
            }
            // wait for all the workers to complete
            for (Future<?> handle : handlers) {
                handle.get();
            }
        } finally {
            executorService.shutdown();
        }
        lastCommittedTransactionId = transactionIdStore.getLastCommittedTransactionId();
    }
    return lastCommittedTransactionId;
}

Example 15 with TransactionIdStore

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

the class TxPullRequestHandlerTest method shouldRespondWithCompleteStreamOfTransactions.

@Test
public void shouldRespondWithCompleteStreamOfTransactions() throws Exception {
    // given
    StoreId storeId = new StoreId(1, 2, 3, 4);
    TransactionIdStore transactionIdStore = mock(TransactionIdStore.class);
    when(transactionIdStore.getLastCommittedTransactionId()).thenReturn(15L);
    LogicalTransactionStore logicalTransactionStore = mock(LogicalTransactionStore.class);
    when(logicalTransactionStore.getTransactions(14L)).thenReturn(txCursor(cursor(tx(14), tx(15))));
    TxPullRequestHandler txPullRequestHandler = new TxPullRequestHandler(new CatchupServerProtocol(), () -> storeId, () -> true, () -> transactionIdStore, () -> logicalTransactionStore, BATCH_SIZE, new Monitors(), NullLogProvider.getInstance());
    // when
    txPullRequestHandler.channelRead0(context, new TxPullRequest(13, storeId));
    // then
    verify(context, times(2)).write(ResponseMessageType.TX);
    verify(context).write(new TxPullResponse(storeId, tx(14)));
    verify(context).write(new TxPullResponse(storeId, tx(15)));
    verify(context).write(ResponseMessageType.TX_STREAM_FINISHED);
    verify(context).write(new TxStreamFinishedResponse(SUCCESS_END_OF_STREAM, 15L));
}