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

Example 11 with TransactionCursor

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

the class LabelAndIndexUpdateBatchingIT method extractTransactions.

private static List<TransactionRepresentation> extractTransactions(GraphDatabaseAPI db) throws NoSuchTransactionException, IOException {
    LogicalTransactionStore txStore = db.getDependencyResolver().resolveDependency(LogicalTransactionStore.class);
    List<TransactionRepresentation> transactions = new ArrayList<>();
    try (TransactionCursor cursor = txStore.getTransactions(TransactionIdStore.BASE_TX_ID + 1)) {
        cursor.forAll(tx -> transactions.add(tx.getTransactionRepresentation()));
    }
    return transactions;
}

Example 12 with TransactionCursor

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

the class RecoverIndexDropIT method extractLastTransaction.

private static CommittedTransactionRepresentation extractLastTransaction(GraphDatabaseAPI db) throws IOException {
    LogicalTransactionStore txStore = db.getDependencyResolver().resolveDependency(LogicalTransactionStore.class);
    CommittedTransactionRepresentation transaction = null;
    try (TransactionCursor cursor = txStore.getTransactions(TransactionIdStore.BASE_TX_ID + 1)) {
        while (cursor.next()) {
            transaction = cursor.get();
        }
    }
    return transaction;
}

Example 13 with TransactionCursor

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

the class RecoveryProgressIndicatorTest method reportProgressOnRecovery.

@Test
void reportProgressOnRecovery() throws Throwable {
    RecoveryService recoveryService = mock(RecoveryService.class, Answers.RETURNS_MOCKS);
    CorruptedLogsTruncator logsTruncator = mock(CorruptedLogsTruncator.class);
    RecoveryMonitor recoveryMonitor = mock(RecoveryMonitor.class);
    TransactionCursor reverseTransactionCursor = mock(TransactionCursor.class);
    TransactionCursor transactionCursor = mock(TransactionCursor.class);
    CommittedTransactionRepresentation transactionRepresentation = mock(CommittedTransactionRepresentation.class);
    int transactionsToRecover = 5;
    int expectedMax = transactionsToRecover * 2;
    int lastCommittedTransactionId = 14;
    LogPosition transactionLogPosition = new LogPosition(0, CURRENT_FORMAT_LOG_HEADER_SIZE);
    LogPosition checkpointLogPosition = new LogPosition(0, CURRENT_FORMAT_LOG_HEADER_SIZE);
    int firstTxIdAfterLastCheckPoint = 10;
    RecoveryStartInformation startInformation = new RecoveryStartInformation(transactionLogPosition, checkpointLogPosition, firstTxIdAfterLastCheckPoint);
    when(reverseTransactionCursor.next()).thenAnswer(new NextTransactionAnswer(transactionsToRecover));
    when(transactionCursor.next()).thenAnswer(new NextTransactionAnswer(transactionsToRecover));
    when(reverseTransactionCursor.get()).thenReturn(transactionRepresentation);
    when(transactionCursor.get()).thenReturn(transactionRepresentation);
    when(transactionRepresentation.getCommitEntry()).thenReturn(new LogEntryCommit(lastCommittedTransactionId, 1L, BASE_TX_CHECKSUM));
    when(recoveryService.getRecoveryStartInformation()).thenReturn(startInformation);
    when(recoveryService.getTransactionsInReverseOrder(transactionLogPosition)).thenReturn(reverseTransactionCursor);
    when(recoveryService.getTransactions(transactionLogPosition)).thenReturn(transactionCursor);
    AssertableProgressReporter progressReporter = new AssertableProgressReporter(expectedMax);
    TransactionLogsRecovery recovery = new TransactionLogsRecovery(recoveryService, logsTruncator, new LifecycleAdapter(), recoveryMonitor, progressReporter, true, EMPTY_CHECKER, PageCacheTracer.NULL);
    recovery.init();
    progressReporter.verify();
}

Example 14 with TransactionCursor

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

the class ReversedMultiFileTransactionCursorTest method shouldReadMultipleVersionsReversed.

@Test
void shouldReadMultipleVersionsReversed() throws Exception {
    // GIVEN
    TransactionCursor cursor = new ReversedMultiFileTransactionCursor(logFile, log(5, 3, 8), 2, start());
    // WHEN
    CommittedTransactionRepresentation[] reversed = exhaust(cursor);
    // THEN
    assertTransactionRange(reversed, 5 + 3 + 8, 0);
}

Example 15 with TransactionCursor

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

the class LabelAndIndexUpdateBatchingIT method extractTransactions.

private static List<TransactionRepresentation> extractTransactions(GraphDatabaseAPI db, long txIdToStartOn) throws IOException {
    LogicalTransactionStore txStore = db.getDependencyResolver().resolveDependency(LogicalTransactionStore.class);
    List<TransactionRepresentation> transactions = new ArrayList<>();
    try (TransactionCursor cursor = txStore.getTransactions(txIdToStartOn)) {
        cursor.forAll(tx -> transactions.add(tx.getTransactionRepresentation()));
    }
    return transactions;
}