public void try_read_returns_false_when_writer_checksum_is_equal_to_reader_checksum()
{
var writerchk = new InMemoryCheckpoint();
var chaserchk = new InMemoryCheckpoint(Checkpoint.Chaser, 0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
10000,
0,
writerchk,
chaserchk,
new InMemoryCheckpoint(-1),
new InMemoryCheckpoint(-1)));
db.Open();
writerchk.Write(12);
writerchk.Flush();
chaserchk.Write(12);
chaserchk.Flush();
var chaser = new TFChunkChaser(db, writerchk, chaserchk);
chaser.Open();
LogRecord record;
Assert.IsFalse(chaser.TryReadNext(out record));
Assert.AreEqual(12, chaserchk.Read());
chaser.Close();
db.Dispose();
}
public void try_read_returns_false_when_writer_checkpoint_is_zero()
{
var writerchk = new InMemoryCheckpoint(0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new PrefixFileNamingStrategy(PathName, "prefix.tf"),
10000,
0,
writerchk,
new ICheckpoint[0]));
db.OpenVerifyAndClean();
var chaser = new TFChunkChaser(db, writerchk, new InMemoryCheckpoint());
chaser.Open();
LogRecord record;
Assert.IsFalse(chaser.TryReadNext(out record));
chaser.Close();
db.Dispose();
}
public void try_read_returns_false_when_writer_checkpoint_is_zero()
{
var writerchk = new InMemoryCheckpoint(0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new VersionedPatternFileNamingStrategy(PathName, "chunk-"),
10000,
0,
writerchk,
new InMemoryCheckpoint(),
new InMemoryCheckpoint(-1),
new InMemoryCheckpoint(-1)));
db.Open();
var chaser = new TFChunkChaser(db, writerchk, new InMemoryCheckpoint());
chaser.Open();
LogRecord record;
Assert.IsFalse(chaser.TryReadNext(out record));
chaser.Close();
db.Dispose();
}
public void try_read_returns_record_when_writerchecksum_ahead()
{
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 });
using (var fs = new FileStream(GetFilePathFor("prefix.tf0"), FileMode.CreateNew, FileAccess.Write))
{
fs.SetLength(ChunkHeader.Size + ChunkFooter.Size + 10000);
var chunkHeader = new ChunkHeader(TFChunk.CurrentChunkVersion, 10000, 0, 0, false).AsByteArray();
var writer = new BinaryWriter(fs);
writer.Write(chunkHeader);
recordToWrite.WriteWithLengthPrefixAndSuffixTo(writer);
fs.Close();
}
var writerchk = new InMemoryCheckpoint(128);
var chaserchk = new InMemoryCheckpoint(Checkpoint.Chaser, 0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new PrefixFileNamingStrategy(PathName, "prefix.tf"),
10000,
0,
writerchk,
chaserchk,
new[] {chaserchk}));
db.OpenVerifyAndClean();
var chaser = new TFChunkChaser(db, writerchk, chaserchk);
chaser.Open();
LogRecord record;
var recordRead = chaser.TryReadNext(out record);
chaser.Close();
Assert.AreEqual(record.GetSizeWithLengthPrefixAndSuffix(), chaserchk.Read());
Assert.IsTrue(recordRead);
Assert.AreEqual(recordToWrite, record);
db.Close();
}
public void try_read_returns_record_when_writerchecksum_equal()
{
var writerchk = new InMemoryCheckpoint(0);
var chaserchk = new InMemoryCheckpoint(Checkpoint.Chaser, 0);
var db = new TFChunkDb(new TFChunkDbConfig(PathName,
new PrefixFileNamingStrategy(PathName, "prefix.tf"),
10000,
0,
writerchk,
chaserchk,
new[] {chaserchk}));
db.OpenVerifyAndClean();
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 writer = new TFChunkWriter(db);
writer.Open();
long pos;
Assert.IsTrue(writer.Write(recordToWrite, out pos));
writer.Close();
writerchk.Write(recordToWrite.GetSizeWithLengthPrefixAndSuffix());
var chaser = new TFChunkChaser(db, writerchk, chaserchk);
chaser.Open();
LogRecord record;
var readRecord = chaser.TryReadNext(out record);
chaser.Close();
Assert.IsTrue(readRecord);
Assert.AreEqual(record.GetSizeWithLengthPrefixAndSuffix(), chaserchk.Read());
Assert.AreEqual(recordToWrite, record);
db.Close();
}