public void AddAndLookupItemsPersisted()
{
string path = Path.GetFullPath("TestData\\AddAndLookupItemsPersisted");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
JournalWriter jw = new JournalWriter("TestData\\AddAndLookupItemsPersisted", 523, false);
List<KeyValuePair<Key, Value>> values = new List<KeyValuePair<Key, Value>>();
for (int i = 0; i < 10000; i++) {
var randomKey = Key.Random(40);
var randomValue = Value.Random(256);
values.Add(new KeyValuePair<Key, Value>(randomKey, randomValue));
jw.Add(randomKey, randomValue);
}
jw.Close();
MemTable mtl = new MemTable();
mtl.ReadFromJournal("TestData\\AddAndLookupItemsPersisted", 523);
Value value;
foreach (var pair in values) {
Assert.IsTrue(mtl.Lookup(pair.Key, out value));
Assert.AreEqual(pair.Value, value);
}
Assert.IsFalse(mtl.Lookup(Key.Random(40), out value));
Assert.AreEqual(10000 * (40 + 256), mtl.Size);
Assert.IsTrue(mtl.Full);
}
public void ReadAndWriteJournalFileWithAppend()
{
string path = Path.GetFullPath("TestData\\RWJournalAppend");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
JournalWriter jw = new JournalWriter(path, 324, false);
List<KeyValuePair<Key, Value>> items = new List<KeyValuePair<Key, Value>>();
for (int i = 0; i < 5000; i++) {
Key randKey = Key.Random(20);
Value randValue = Value.Random(100);
jw.Add(randKey, randValue);
items.Add(new KeyValuePair<Key, Value>(randKey, randValue));
}
jw.Close();
// reopen the same log for append
jw = new JournalWriter(path, 324, true);
for (int i = 0; i < 5000; i++) {
Key randKey = Key.Random(20);
Value randValue = Value.Random(100);
jw.Add(randKey, randValue);
items.Add(new KeyValuePair<Key, Value>(randKey, randValue));
}
jw.Close();
JournalReader jr = new JournalReader(path, 324);
int j = 0;
foreach (var pair in jr.Enumerate()) {
Assert.AreEqual(items[j].Key, pair.Key);
Assert.AreEqual(items[j].Value, pair.Value);
j++;
}
jr.Close();
}
public JournaledMemTable(string baseFileName, int version)
{
_baseFileName = baseFileName;
_version = version;
_memTable = new MemTable();
// If the journal exists from a previous run, then load its data into the memtable
string journalFile = Config.JournalFile(baseFileName, version);
if (File.Exists(journalFile))
{
var journalReader = new JournalReader(baseFileName, version);
try {
foreach (var pair in journalReader.Enumerate())
{
_memTable.Add(pair.Key, pair.Value);
}
} finally {
journalReader.Close();
}
_journal = new JournalWriter(baseFileName, version, true);
}
else
{
_journal = new JournalWriter(baseFileName, version, false);
}
}
public void CreateJournalFile()
{
string path = Path.GetFullPath("TestData\\JournalFileV1");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
JournalWriter jw = new JournalWriter(path, 324, false);
List<KeyValuePair<KeyEx, Value>> items = new List<KeyValuePair<KeyEx, Value>>();
for (int i = 0; i < 1000; i++) {
KeyEx randKey = KeyEx.Random(20);
Value randValue = Value.Random(100);
jw.Add(randKey, randValue);
items.Add(new KeyValuePair<KeyEx, Value>(randKey, randValue));
}
jw.Close();
JournalReader jr = new JournalReader(path, 324);
int j = 0;
foreach (var pair in jr.Enumerate()) {
Assert.AreEqual(items[j].Key, pair.Key);
Assert.AreEqual(items[j].Value, pair.Value);
j++;
}
jr.Close();
}
public void Close()
{
if (_journal != null)
{
_journal.Close();
}
_journal = null;
_memTable = null;
}
public JournaledMemTable(string baseFileName, int version)
{
_baseFileName = baseFileName;
_version = version;
_memTable = new MemTable();
// If the journal exists from a previous run, then load its data into the memtable
string journalFile = Config.JournalFile(baseFileName, version);
if (File.Exists(journalFile)) {
var journalReader = new JournalReader(baseFileName, version);
try {
foreach (var pair in journalReader.Enumerate()) {
_memTable.Add(pair.Key, pair.Value);
}
} finally {
journalReader.Close();
}
_journal = new JournalWriter(baseFileName, version, true);
} else {
_journal = new JournalWriter(baseFileName, version, false);
}
}
public void ReadCorruptedJournalFile()
{
string path = Path.GetFullPath("TestData\\ReadCorruptedJournal");
if (!Directory.Exists(path))
Directory.CreateDirectory(path);
JournalWriter jw = new JournalWriter(path, 324, false);
List<KeyValuePair<Key, Value>> items = new List<KeyValuePair<Key, Value>>();
for (int i = 0; i < 10; i++) {
Key randKey = Key.Random(20);
Value randValue = Value.Random(100);
jw.Add(randKey, randValue);
items.Add(new KeyValuePair<Key, Value>(randKey, randValue));
}
jw.Close();
// Reopen the file and add a partial record
var fileName = Config.JournalFile(path, 324);
var writer = new BinaryWriter(new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None, 1024, false));
Key key = Key.Random(20);
writer.Write7BitEncodedInt(key.Length);
writer.Write(key.InternalBytes);
writer.Write7BitEncodedInt(0);
writer.Flush();
writer.Close();
JournalReader jr = new JournalReader(path, 324);
int j = 0;
foreach (var pair in jr.Enumerate()) {
Assert.AreEqual(items[j].Key, pair.Key);
Assert.AreEqual(items[j].Value, pair.Value);
j++;
}
jr.Close();
}
public void Close()
{
if (_journal != null)
_journal.Close();
_journal = null;
_memTable = null;
}