public void try_read_does_not_cache_anything_and_returns_record_once_it_is_written_later() { var writerchk = new InMemoryCheckpoint(0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new ICheckpoint[0]); // create db var writer = new MultifileTransactionFileWriter(config); writer.Open(); var reader = new MultifileTransactionFileChaser(config); reader.Open(); LogRecord record; Assert.IsFalse(reader.TryReadNext(out record)); var rec = LogRecord.SingleWrite(0, Guid.NewGuid(), Guid.NewGuid(), "ES", -1, "ET", new byte[] { 7 }, null); long tmp; Assert.IsTrue(writer.Write(rec, out tmp)); writer.Flush(); writer.Close(); Assert.IsTrue(reader.TryReadNext(out record)); Assert.AreEqual(rec, record); reader.Close(); }
public void try_read_returns_false_when_writer_checksum_is_ahead_but_not_enough_to_read_record() { var writerchk = new InMemoryCheckpoint(50); var readerchk = new InMemoryCheckpoint("reader", 0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new[] { readerchk }); var recordToWrite = new PrepareLogRecord(logPosition: 0, correlationId: _correlationId, eventId: _eventId, transactionPosition: 0, eventStreamId: "WorldEnding", expectedVersion: 1234, timeStamp: new DateTime(2012, 12, 21), flags: PrepareFlags.None, eventType: "type", data: new byte[] { 1, 2, 3, 4, 5 }, metadata: new byte[] { 7, 17 }); using (var fs = new FileStream(Path.Combine(PathName, "prefix.tf0"), FileMode.CreateNew, FileAccess.Write)) { var writer = new BinaryWriter(fs); recordToWrite.WriteWithLengthPrefixTo(writer); fs.Close(); } var reader = new MultifileTransactionFileChaser(config, "reader"); reader.Open(); LogRecord record = null; var readRecord = reader.TryReadNext(out record); reader.Close(); Assert.IsFalse(readRecord); Assert.AreEqual(0, readerchk.Read()); }
public void try_read_returns_false_when_writer_checksum_is_zero() { var writerchk = new InMemoryCheckpoint(0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new List <ICheckpoint>()); File.WriteAllBytes(Path.Combine(PathName, "prefix.tf0"), new byte[10000]); var reader = new MultifileTransactionFileChaser(config); reader.Open(); LogRecord record; Assert.IsFalse(reader.TryReadNext(out record)); reader.Close(); }
public void can_read_a_record_with_length_straddling_multiple_files() { var writerchk = new InMemoryCheckpoint(20020); var readerchk = new InMemoryCheckpoint("reader", 9998); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new[] { readerchk }); var recordToWrite = new PrepareLogRecord(logPosition: 0, correlationId: _correlationId, eventId: _eventId, transactionPosition: 0, transactionOffset: 0, eventStreamId: "WorldEnding", expectedVersion: 1234, timeStamp: new DateTime(2012, 12, 21), flags: PrepareFlags.None, eventType: "type", data: new byte[] { 1, 2, 3, 4, 5 }, metadata: new byte[] { 7, 17 }); var memstream = new MemoryStream(); var writer = new BinaryWriter(memstream); recordToWrite.WriteWithLengthPrefixAndSuffixTo(writer); var buf = memstream.GetBuffer(); using (var fs = new FileStream(config.FileNamingStrategy.GetFilenameFor(0), FileMode.CreateNew, FileAccess.Write)) { fs.Seek(9998, SeekOrigin.Begin); fs.Write(buf, 0, 2); fs.Close(); } using (var fs = new FileStream(config.FileNamingStrategy.GetFilenameFor(1), FileMode.CreateNew, FileAccess.Write)) { fs.Seek(0, SeekOrigin.Begin); fs.Write(buf, 2, recordToWrite.GetSizeWithLengthPrefixAndSuffix() - 2); fs.Close(); } var reader = new MultifileTransactionFileChaser(config, readerchk); reader.Open(); LogRecord record; var readRecord = reader.TryReadNext(out record); reader.Close(); Assert.IsTrue(readRecord); Assert.AreEqual(recordToWrite, record); Assert.AreEqual(9998 + recordToWrite.GetSizeWithLengthPrefixAndSuffix(), readerchk.Read()); }
public void try_read_returns_false_when_writer_checksum_is_equal_to_reader_checksum() { var writerchk = new InMemoryCheckpoint(12); var readerchk = new InMemoryCheckpoint("reader", 12); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new[] { readerchk }); File.WriteAllBytes(Path.Combine(PathName, "prefix.tf0"), new byte[10000]); var reader = new MultifileTransactionFileChaser(config, "reader"); reader.Open(); LogRecord record; Assert.IsFalse(reader.TryReadNext(out record)); Assert.AreEqual(12, readerchk.Read()); reader.Close(); }
public void try_read_returns_false_when_writer_checksum_is_zero() { var writerchk = new InMemoryCheckpoint(0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new ICheckpoint[0]); // create db var writer = new MultifileTransactionFileWriter(config); writer.Open(); writer.Close(); var reader = new MultifileTransactionFileChaser(config); reader.Open(); LogRecord record; Assert.IsFalse(reader.TryReadNext(out record)); reader.Close(); }
public void try_read_returns_record_when_record_bigger_than_internal_buffer() { var writerchk = new InMemoryCheckpoint(9999); var readerchk = new InMemoryCheckpoint("reader", 0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new[] { readerchk }); var recordToWrite = new PrepareLogRecord(logPosition: 0, correlationId: _correlationId, eventId: _eventId, transactionPosition: 0, transactionOffset: 0, eventStreamId: "WorldEnding", expectedVersion: 1234, timeStamp: new DateTime(2012, 12, 21), flags: PrepareFlags.None, eventType: "type", data: new byte[9000], metadata: new byte[] { 7, 17 }); using (var fs = new FileStream(Path.Combine(PathName, "prefix.tf0"), FileMode.CreateNew, FileAccess.Write)) { var writer = new BinaryWriter(fs); recordToWrite.WriteWithLengthPrefixAndSuffixTo(writer); fs.Close(); } writerchk.Write(recordToWrite.GetSizeWithLengthPrefixAndSuffix()); var reader = new MultifileTransactionFileChaser(config, readerchk); reader.Open(); LogRecord record; var readRecord = reader.TryReadNext(out record); reader.Close(); Assert.IsTrue(readRecord); Assert.AreEqual(record.GetSizeWithLengthPrefixAndSuffix(), readerchk.Read()); Assert.AreEqual(recordToWrite, record); }
public void try_read_returns_properly_when_writer_is_written_to_while_chasing() { var writerchk = new InMemoryCheckpoint(0); var readerchk = new InMemoryCheckpoint("reader", 0); var config = new TransactionFileDatabaseConfig(PathName, "prefix.tf", 10000, writerchk, new[] { readerchk }); var fileName = Path.Combine(PathName, "prefix.tf0"); File.Create(fileName).Close(); var reader = new MultifileTransactionFileChaser(config, "reader"); reader.Open(); LogRecord record; Assert.IsFalse(reader.TryReadNext(out record)); var recordToWrite = new PrepareLogRecord(logPosition: 0, correlationId: _correlationId, eventId: _eventId, transactionPosition: 0, eventStreamId: "WorldEnding", expectedVersion: 1234, timeStamp: new DateTime(2012, 12, 21), flags: PrepareFlags.None, eventType: "type", data: new byte[] { 1, 2, 3, 4, 5 }, metadata: new byte[] { 7, 17 }); var memstream = new MemoryStream(); var writer = new BinaryWriter(memstream); recordToWrite.WriteWithLengthPrefixTo(writer); using (var fs = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite)) { fs.Write(memstream.ToArray(), 0, (int)memstream.Length); fs.Flush(flushToDisk: true); } writerchk.Write(memstream.Length); Assert.IsTrue(reader.TryReadNext(out record)); Assert.AreEqual(record, recordToWrite); var recordToWrite2 = new PrepareLogRecord(logPosition: 0, correlationId: _correlationId, eventId: _eventId, transactionPosition: 0, eventStreamId: "WorldEnding", expectedVersion: 4321, timeStamp: new DateTime(2012, 12, 21), flags: PrepareFlags.None, eventType: "type", data: new byte[] { 3, 2, 1 }, metadata: new byte[] { 9 }); memstream.SetLength(0); recordToWrite2.WriteWithLengthPrefixTo(writer); using (var fs = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite)) { fs.Write(memstream.ToArray(), 0, (int)memstream.Length); fs.Flush(flushToDisk: true); } writerchk.Write(writerchk.Read() + memstream.Length); Assert.IsTrue(reader.TryReadNext(out record)); Assert.AreEqual(record, recordToWrite2); reader.Close(); }