public DatabaseMigrator(MigrationProgressMonitor progressMonitor, FileSystemAbstraction fs, Config config, LogService logService, IndexProviderMap indexProviderMap, ExplicitIndexProvider indexProvider, PageCache pageCache, RecordFormats format, LogTailScanner tailScanner, JobScheduler jobScheduler)
{
this._progressMonitor = progressMonitor;
this._fs = fs;
this._config = config;
this._logService = logService;
this._indexProviderMap = indexProviderMap;
this._explicitIndexProvider = indexProvider;
this._pageCache = pageCache;
this._format = format;
this._tailScanner = tailScanner;
this._jobScheduler = jobScheduler;
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public boolean isRecoveryRequiredAt(org.neo4j.io.layout.DatabaseLayout databaseLayout) throws java.io.IOException
public virtual bool IsRecoveryRequiredAt(DatabaseLayout databaseLayout)
{
// We need config to determine where the logical log files are
if (!NeoStores.isStorePresent(_pageCache, databaseLayout))
{
return(false);
}
LogEntryReader <ReadableClosablePositionAwareChannel> reader = new VersionAwareLogEntryReader <ReadableClosablePositionAwareChannel>();
LogFiles logFiles = LogFilesBuilder.activeFilesBuilder(databaseLayout, _fs, _pageCache).withConfig(_config).withLogEntryReader(reader).build();
LogTailScanner tailScanner = new LogTailScanner(logFiles, reader, _monitors);
return((new RecoveryStartInformationProvider(tailScanner, NO_MONITOR)).get().RecoveryRequired);
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public static void check(org.neo4j.kernel.recovery.LogTailScanner tailScanner, org.neo4j.kernel.configuration.Config config) throws org.neo4j.kernel.impl.storemigration.UpgradeNotAllowedByConfigurationException
public static void Check(LogTailScanner tailScanner, Config config)
{
if (!config.Get(GraphDatabaseSettings.allow_upgrade))
{
// The user doesn't want us to upgrade the store.
LogEntryVersion latestLogEntryVersion = tailScanner.TailInformation.latestLogEntryVersion;
if (latestLogEntryVersion != null && LogEntryVersion.moreRecentVersionExists(latestLogEntryVersion))
{
string message = "The version you're upgrading to is using a new transaction log format. This is a " +
"non-reversible upgrade and you wont be able to downgrade after starting";
throw new UpgradeNotAllowedByConfigurationException(message);
}
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: private void appendCheckpoint(org.neo4j.kernel.impl.transaction.log.entry.LogEntryVersion logVersion) throws java.io.IOException
private void AppendCheckpoint(LogEntryVersion logVersion)
{
PageCache pageCache = _pageCacheRule.getPageCache(_fs);
VersionAwareLogEntryReader <ReadableClosablePositionAwareChannel> logEntryReader = new VersionAwareLogEntryReader <ReadableClosablePositionAwareChannel>();
LogFiles logFiles = LogFilesBuilder.activeFilesBuilder(_storeDirectory.databaseLayout(), _fs, pageCache).withLogEntryReader(logEntryReader).build();
LogTailScanner tailScanner = new LogTailScanner(logFiles, logEntryReader, new Monitors());
LogTailScanner.LogTailInformation tailInformation = tailScanner.TailInformation;
using (Lifespan lifespan = new Lifespan(logFiles))
{
FlushablePositionAwareChannel channel = logFiles.LogFile.Writer;
LogPosition logPosition = tailInformation.LastCheckPoint.LogPosition;
// Fake record
channel.Put(logVersion.byteCode()).put(CHECK_POINT).putLong(logPosition.LogVersion).putLong(logPosition.ByteOffset);
channel.PrepareForFlush().flush();
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public static void removeCheckPointFromTxLog(org.neo4j.io.fs.FileSystemAbstraction fileSystem, java.io.File databaseDirectory) throws java.io.IOException
public static void RemoveCheckPointFromTxLog(FileSystemAbstraction fileSystem, File databaseDirectory)
{
LogFiles logFiles = LogFilesBuilder.logFilesBasedOnlyBuilder(databaseDirectory, fileSystem).build();
LogEntryReader <ReadableClosablePositionAwareChannel> logEntryReader = new VersionAwareLogEntryReader <ReadableClosablePositionAwareChannel>();
LogTailScanner tailScanner = new LogTailScanner(logFiles, logEntryReader, new Monitors());
LogTailScanner.LogTailInformation logTailInformation = tailScanner.TailInformation;
if (logTailInformation.CommitsAfterLastCheckpoint())
{
// done already
return;
}
// let's assume there is at least a checkpoint
assertNotNull(logTailInformation.LastCheckPoint);
LogPosition logPosition = logTailInformation.LastCheckPoint.LogPosition;
File logFile = logFiles.GetLogFileForVersion(logPosition.LogVersion);
fileSystem.Truncate(logFile, logPosition.ByteOffset);
}
