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

Example 6 with TransactionMetadataCache

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

the class RecoveryTest method shouldRecoverExistingData.

@Test
public void shouldRecoverExistingData() throws Exception {
    final PhysicalLogFiles logFiles = new PhysicalLogFiles(directory.directory(), "log", fileSystemRule.get());
    File file = logFiles.getLogFileForVersion(logVersion);
    writeSomeData(file, new Visitor<Pair<LogEntryWriter, Consumer<LogPositionMarker>>, IOException>() {

        @Override
        public boolean visit(Pair<LogEntryWriter, Consumer<LogPositionMarker>> pair) throws IOException {
            LogEntryWriter writer = pair.first();
            Consumer<LogPositionMarker> consumer = pair.other();
            LogPositionMarker marker = new LogPositionMarker();
            // last committed tx
            consumer.accept(marker);
            LogPosition lastCommittedTxPosition = marker.newPosition();
            writer.writeStartEntry(0, 1, 2L, 3L, new byte[0]);
            lastCommittedTxStartEntry = new LogEntryStart(0, 1, 2L, 3L, new byte[0], lastCommittedTxPosition);
            writer.writeCommitEntry(4L, 5L);
            lastCommittedTxCommitEntry = new OnePhaseCommit(4L, 5L);
            // check point pointing to the previously committed transaction
            writer.writeCheckPointEntry(lastCommittedTxPosition);
            expectedCheckPointEntry = new CheckPoint(lastCommittedTxPosition);
            // tx committed after checkpoint
            consumer.accept(marker);
            writer.writeStartEntry(0, 1, 6L, 4L, new byte[0]);
            expectedStartEntry = new LogEntryStart(0, 1, 6L, 4L, new byte[0], marker.newPosition());
            writer.writeCommitEntry(5L, 7L);
            expectedCommitEntry = new OnePhaseCommit(5L, 7L);
            return true;
        }
    });
    LifeSupport life = new LifeSupport();
    Recovery.Monitor monitor = mock(Recovery.Monitor.class);
    final AtomicBoolean recoveryRequired = new AtomicBoolean();
    try {
        StorageEngine storageEngine = mock(StorageEngine.class);
        final LogEntryReader<ReadableClosablePositionAwareChannel> reader = new VersionAwareLogEntryReader<>();
        LatestCheckPointFinder finder = new LatestCheckPointFinder(logFiles, fileSystemRule.get(), reader);
        LogHeaderCache logHeaderCache = new LogHeaderCache(10);
        TransactionMetadataCache metadataCache = new TransactionMetadataCache(100);
        LogFile logFile = life.add(new PhysicalLogFile(fileSystemRule.get(), logFiles, 50, () -> transactionIdStore.getLastCommittedTransactionId(), logVersionRepository, mock(PhysicalLogFile.Monitor.class), logHeaderCache));
        LogicalTransactionStore txStore = new PhysicalLogicalTransactionStore(logFile, metadataCache, reader);
        life.add(new Recovery(new DefaultRecoverySPI(storageEngine, logFiles, fileSystemRule.get(), logVersionRepository, finder, transactionIdStore, txStore, NO_MONITOR) {

            private int nr = 0;

            @Override
            public Visitor<CommittedTransactionRepresentation, Exception> startRecovery() {
                recoveryRequired.set(true);
                final Visitor<CommittedTransactionRepresentation, Exception> actual = super.startRecovery();
                return new Visitor<CommittedTransactionRepresentation, Exception>() {

                    @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;
                    }
                };
            }
        }, monitor));
        life.start();
        InOrder order = inOrder(monitor);
        order.verify(monitor, times(1)).recoveryRequired(any(LogPosition.class));
        order.verify(monitor, times(1)).recoveryCompleted(2);
        assertTrue(recoveryRequired.get());
    } finally {
        life.shutdown();
    }
}

Example 7 with TransactionMetadataCache

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

the class TransactionMetadataCacheTest method shouldReturnNullWhenMissingATxInTheCache.

@Test
public void shouldReturnNullWhenMissingATxInTheCache() {
    // given
    final TransactionMetadataCache cache = new TransactionMetadataCache(2);
    // when
    final TransactionMetadataCache.TransactionMetadata metadata = cache.getTransactionMetadata(42);
    // then
    assertNull(metadata);
}

Example 8 with TransactionMetadataCache

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

the class TransactionMetadataCacheTest method shouldReturnTheTxValueTIfInTheCached.

@Test
public void shouldReturnTheTxValueTIfInTheCached() {
    // given
    final TransactionMetadataCache cache = new TransactionMetadataCache(2);
    final LogPosition position = new LogPosition(3, 4);
    final int txId = 42;
    final int masterId = 0;
    final int authorId = 1;
    final int checksum = 2;
    final long timestamp = System.currentTimeMillis();
    // when
    cache.cacheTransactionMetadata(txId, position, masterId, authorId, checksum, timestamp);
    final TransactionMetadataCache.TransactionMetadata metadata = cache.getTransactionMetadata(txId);
    // then
    assertEquals(new TransactionMetadataCache.TransactionMetadata(masterId, authorId, position, checksum, timestamp), metadata);
}

Example 9 with TransactionMetadataCache

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

the class TransactionMetadataCacheTest method shouldClearTheCache.

@Test
public void shouldClearTheCache() {
    // given
    final TransactionMetadataCache cache = new TransactionMetadataCache(2);
    final LogPosition position = new LogPosition(3, 4);
    final int txId = 42;
    final int masterId = 0;
    final int authorId = 1;
    final int checksum = 2;
    final long timestamp = System.currentTimeMillis();
    // when
    cache.cacheTransactionMetadata(txId, position, masterId, authorId, checksum, timestamp);
    cache.clear();
    final TransactionMetadataCache.TransactionMetadata metadata = cache.getTransactionMetadata(txId);
    // then
    assertNull(metadata);
}