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

Example 31 with LogPosition

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

the class LatestCheckPointFinderTest method logFile.

private LogCreator logFile(Entry... entries) {
    return (logVersion, positions) -> {
        try {
            AtomicLong lastTxId = new AtomicLong();
            Supplier<Long> lastTxIdSupplier = () -> lastTxId.get();
            LogVersionRepository logVersionRepository = new DeadSimpleLogVersionRepository(logVersion);
            LifeSupport life = new LifeSupport();
            life.start();
            PhysicalLogFile logFile = life.add(new PhysicalLogFile(fsRule.get(), logFiles, mebiBytes(1), lastTxIdSupplier, logVersionRepository, NO_MONITOR, new LogHeaderCache(10)));
            try {
                FlushablePositionAwareChannel writeChannel = logFile.getWriter();
                LogPositionMarker positionMarker = new LogPositionMarker();
                LogEntryWriter writer = new LogEntryWriter(writeChannel);
                for (Entry entry : entries) {
                    LogPosition currentPosition = writeChannel.getCurrentPosition(positionMarker).newPosition();
                    positions.put(entry, currentPosition);
                    if (entry instanceof StartEntry) {
                        writer.writeStartEntry(0, 0, 0, 0, new byte[0]);
                    } else if (entry instanceof CommitEntry) {
                        CommitEntry commitEntry = (CommitEntry) entry;
                        writer.writeCommitEntry(commitEntry.txId, 0);
                        lastTxId.set(commitEntry.txId);
                    } else if (entry instanceof CheckPointEntry) {
                        CheckPointEntry checkPointEntry = (CheckPointEntry) entry;
                        Entry target = checkPointEntry.withPositionOfEntry;
                        LogPosition logPosition = target != null ? positions.get(target) : currentPosition;
                        assert logPosition != null : "No registered log position for " + target;
                        writer.writeCheckPointEntry(logPosition);
                    } else if (entry instanceof PositionEntry) {
                    // Don't write anything, this entry is just for registering a position so that
                    // another CheckPointEntry can refer to it
                    } else {
                        throw new IllegalArgumentException("Unknown entry " + entry);
                    }
                }
            } finally {
                life.shutdown();
            }
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    };
}

Example 32 with LogPosition

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

the class PositionToRecoverFromTest method shouldReturnUnspecifiedIfThereIsNoNeedForRecovery.

@Test
public void shouldReturnUnspecifiedIfThereIsNoNeedForRecovery() throws Throwable {
    // given
    when(finder.find(logVersion)).thenReturn(new LatestCheckPoint(null, false, NO_TRANSACTION_ID, logVersion));
    // when
    LogPosition logPosition = new PositionToRecoverFrom(finder, monitor).apply(logVersion);
    // then
    verify(monitor).noCommitsAfterLastCheckPoint(null);
    assertEquals(LogPosition.UNSPECIFIED, logPosition);
}

Example 33 with LogPosition

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

the class PositionToRecoverFromTest method shouldRecoverFromStartOfLogZeroIfThereAreNoCheckPointAndOldestLogIsVersionZero.

@Test
public void shouldRecoverFromStartOfLogZeroIfThereAreNoCheckPointAndOldestLogIsVersionZero() throws Throwable {
    // given
    when(finder.find(logVersion)).thenReturn(new LatestCheckPoint(null, true, 10L, INITIAL_LOG_VERSION));
    // when
    LogPosition logPosition = new PositionToRecoverFrom(finder, monitor).apply(logVersion);
    // then
    verify(monitor).noCheckPointFound();
    assertEquals(LogPosition.start(INITIAL_LOG_VERSION), logPosition);
}

Example 34 with LogPosition

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

the class PositionToRecoverFromTest method shouldReturnLogPositionToRecoverFromIfNeeded.

@Test
public void shouldReturnLogPositionToRecoverFromIfNeeded() throws Throwable {
    // given
    LogPosition checkPointLogPosition = new LogPosition(1L, 4242);
    when(finder.find(logVersion)).thenReturn(new LatestCheckPoint(new CheckPoint(checkPointLogPosition), true, 10L, logVersion));
    // when
    LogPosition logPosition = new PositionToRecoverFrom(finder, monitor).apply(logVersion);
    // then
    verify(monitor).commitsAfterLastCheckPoint(checkPointLogPosition, 10L);
    assertEquals(checkPointLogPosition, logPosition);
}

Example 35 with LogPosition

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

the class StoreMigratorTest method writeAndReadLastTxLogPosition.

@Test
public void writeAndReadLastTxLogPosition() throws IOException {
    StoreMigrator migrator = newStoreMigrator();
    LogPosition writtenLogPosition = new LogPosition(random.nextLong(), random.nextLong());
    migrator.writeLastTxLogPosition(directory.graphDbDir(), writtenLogPosition);
    LogPosition readLogPosition = migrator.readLastTxLogPosition(directory.graphDbDir());
    assertEquals(writtenLogPosition, readLogPosition);
}