/// <inheritdoc/>
public override void PutTransaction <T>(Transaction <T> tx)
{
if (_txCache.ContainsKey(tx.Id))
{
return;
}
byte[] key = TxKey(tx.Id);
if (!(_txIndexDb.Get(key) is null))
{
return;
}
long timestamp = tx.Timestamp.ToUnixTimeSeconds();
string txDbName = $"epoch{(int)timestamp / _txEpochUnitSeconds}";
_rwTxLock.EnterWriteLock();
try
{
if (!_txDbCache.TryGetValue(txDbName, out RocksDb txDb))
{
txDb = RocksDBUtils.OpenRocksDb(_options, TxDbPath(txDbName));
_txDbCache.AddOrUpdate(txDbName, txDb);
}
txDb.Put(key, tx.Serialize(true));
_txIndexDb.Put(key, RocksDBStoreBitConverter.GetBytes(txDbName));
_txCache.AddOrUpdate(tx.Id, tx);
}
finally
{
_rwTxLock.ExitWriteLock();
}
}
/// <inheritdoc cref="IStore"/>
public bool ContainsBlock(HashDigest <SHA256> blockHash)
{
if (_blockCache.ContainsKey(blockHash))
{
return(true);
}
return(_store.ContainsBlock(blockHash));
}
/// <inheritdoc/>
public override void PutTransaction <T>(Transaction <T> tx)
{
if (_txCache.ContainsKey(tx.Id))
{
return;
}
WriteContentAddressableFile(_txs, TxPath(tx.Id), tx.Serialize(true));
_txCache.AddOrUpdate(tx.Id, tx);
}
/// <inheritdoc/>
public override void PutBlock <T>(Block <T> block)
{
if (_blockCache.ContainsKey(block.Hash))
{
return;
}
byte[] key = BlockKey(block.Hash);
if (!(_blockIndexDb.Get(key) is null))
{
return;
}
long timestamp = block.Timestamp.ToUnixTimeSeconds();
foreach (Transaction <T> tx in block.Transactions)
{
PutTransaction(tx);
}
_rwBlockLock.EnterWriteLock();
try
{
string blockDbName = $"epoch{timestamp / _blockEpochUnitSeconds}";
RocksDb blockDb;
lock (_blockDbCache)
{
if (!_blockDbCache.TryGetValue(blockDbName, out blockDb))
{
blockDb = RocksDBUtils.OpenRocksDb(_options, BlockDbPath(blockDbName));
_blockDbCache.AddOrUpdate(blockDbName, blockDb);
}
}
BlockDigest digest = BlockDigest.FromBlock(block);
byte[] value = digest.Serialize();
blockDb.Put(key, value);
_blockIndexDb.Put(key, RocksDBStoreBitConverter.GetBytes(blockDbName));
_blockCache.AddOrUpdate(block.Hash, digest);
}
catch (Exception e)
{
LogUnexpectedException(nameof(PutBlock), e);
}
finally
{
_rwBlockLock.ExitWriteLock();
}
}
public byte[] Get(byte[] key)
{
if (_cache.ContainsKey(key))
{
return(_cache[key]);
}
if (_keyValueStore.Get(key) is byte[] bytes)
{
_cache[key] = bytes;
return(bytes);
}
throw new KeyNotFoundException("There were no elements that correspond to the key" +
$" (hex: {ByteUtil.Hex(key)}).");
}
public void Add_ItemIsAdded_ItemExistsInCache()
{
var lru = new LruCache<string, string>(1);
lru.Add("k1", "v1");
Assert.IsTrue(lru.ContainsKey("k1"));
}
/// <inheritdoc/>
public override void PutTransaction <T>(Transaction <T> tx)
{
if (_txCache.ContainsKey(tx.Id))
{
return;
}
byte[] key = TxKey(tx.Id);
if (!(_txDb.Get(key) is null))
{
return;
}
_txDb.Put(key, tx.Serialize(true));
_txCache.AddOrUpdate(tx.Id, tx);
}
/// <inheritdoc cref="IStore.ContainsBlock(BlockHash)"/>
public bool ContainsBlock(BlockHash blockHash)
{
if (_blockCache.ContainsKey(blockHash))
{
return(true);
}
return(_store.ContainsBlock(blockHash));
}
protected void DeleteByGettingWhere(T t)
{
var twhere = GetWhereByObject(t);
if (LruCache.ContainsKey(twhere))
{
LruCache[twhere] = LruCache[twhere].Where(item => !t.PkeyEquals(item)).ToList();
HitInfo.tweakedDirectly++;
}
}
public void ContainsTest(bool shouldExist)
{
var cache = new LruCache <string, TestData>(10);
if (shouldExist)
{
cache.AddOrUpdate("1", new TestData());
}
bool exists = cache.ContainsKey("1");
Assert.AreEqual(shouldExist, exists);
}
public void Add_MaxSizeIsReached_OldestItemDiscarded()
{
var lru = new LruCache<string, string>(5);
lru.Add("k1", "v1");
lru.Add("k2", "v2");
lru.Add("k3", "v3");
lru.Add("k4", "v4");
lru.Add("k5", "v5");
lru.Add("k6", "v6");
Assert.IsFalse(lru.ContainsKey("k1"));
}
/// <inheritdoc/>
public override void PutBlock <T>(Block <T> block)
{
if (_blockCache.ContainsKey(block.Hash))
{
return;
}
UPath path = BlockPath(block.Hash);
if (_blocks.FileExists(path))
{
return;
}
foreach (Transaction <T> tx in block.Transactions)
{
PutTransaction(tx);
}
WriteContentAddressableFile(_blocks, path, block.ToBlockDigest().Serialize());
_blockCache.AddOrUpdate(block.Hash, block.ToBlockDigest());
}
public void TestSizeIsLimited()
{
var cache = new LruCache<string, int>(10);
for (int i = 0; i < 20; i++) {
cache[i.ToString()] = i;
}
Assert.AreEqual(10, cache.Count);
for (int i = 10; i < 20; i++) {
Assert.IsTrue(cache.ContainsKey(i.ToString()));
}
}
public void LruUsageTest()
{
const int maxSize = 10;
var ttl = new TimeSpan(0, 1, 0, 0);
var maxAge = new TimeSpan(0, 1, 0, 0);
var target = new LruCache <string, string>(maxSize, ttl, maxAge);
// Fill the LRU with "1" through "10"
for (var i = 1; i <= maxSize; i++)
{
var s = i.ToString();
target.Add(s, "item " + s);
Thread.Sleep(10);
}
// Use "10", then "9", etc.
for (var i = maxSize; i >= 1; i--)
{
var s = i.ToString();
target.TryGetValue(s, out var value);
}
// Add a new item to push the least recently used out -- which should be item "10"
var s1 = (maxSize + 1).ToString();
target.Add(s1, "item " + s1);
Assert.Equal(maxSize, target.Count); // "Cache has exceeded maximum size"
var s0 = maxSize.ToString();
Assert.False(target.ContainsKey(s0), "Least recently used item was not expelled");
for (var i = 1; i < maxSize; i++)
{
var s = i.ToString();
Assert.True(target.ContainsKey(s), "Recently used item " + s + " was incorrectly expelled");
}
}
/// <inheritdoc/>
public override void PutBlock <T>(Block <T> block)
{
if (_blockCache.ContainsKey(block.Hash))
{
return;
}
byte[] key = BlockKey(block.Hash);
if (!(_blockDb.Get(key) is null))
{
return;
}
foreach (Transaction <T> tx in block.Transactions)
{
PutTransaction(tx);
}
byte[] value = block.ToBlockDigest().Serialize();
_blockDb.Put(key, value);
_blockCache.AddOrUpdate(block.Hash, block.ToBlockDigest());
}
public void CacheAccessShouldBumpItToTheFront()
{
var cache = new LruCache<int, int>(3);
cache[1] = 1;
cache[2] = 2;
cache[3] = 3;
var a = cache[1];
cache[4] = 4;
Assert.AreEqual(cache[1], 1);
Assert.AreEqual(cache[3], 3);
Assert.AreEqual(cache[4], 4);
Assert.IsFalse(cache.ContainsKey(2));
}
public void LruMaximumSizeTest()
{
const int maxSize = 10;
var ttl = new TimeSpan(0, 1, 0, 0);
var maxAge = new TimeSpan(0, 1, 0, 0);
var target = new LruCache <string, string>(maxSize, ttl, maxAge);
for (var i = 1; i <= maxSize + 5; i++)
{
var s = i.ToString();
target.Add(s, "item " + s);
Thread.Sleep(10);
}
Assert.Equal(maxSize, target.Count); // "LRU grew larger than maximum size"
for (var i = 1; i <= 5; i++)
{
var s = i.ToString();
Assert.False(target.ContainsKey(s), "'Older' entry is still in cache");
}
}
/// <inheritdoc cref="IStore.ContainsBlock(BlockHash)"/> public bool ContainsBlock(BlockHash blockHash) => _blockCache.ContainsKey(blockHash) || _store.ContainsBlock(blockHash);
public void ContainsKey_KeyDoestNotExist_ReturnsFalse()
{
var lru = new LruCache<string, string>(1);
Assert.IsFalse(lru.ContainsKey("k1"));
}
public void ContainsKey_KeyExists_ReturnsTrue()
{
var lru = new LruCache<string, string>(1);
lru.Add("k1", "v1");
Assert.IsTrue(lru.ContainsKey("k1"));
}
public void Resize_NewSizeCausesTrim_OnlyOldestItemsDiscarded()
{
var lru = new LruCache<string, string>(5);
lru.Add("k1", "v1");
lru.Add("k2", "v2");
lru.Add("k3", "v3");
lru.Add("k4", "v4");
lru.Add("k5", "v5");
lru.Resize(3);
Assert.IsFalse(lru.ContainsKey("k1"));
Assert.IsFalse(lru.ContainsKey("k2"));
Assert.IsTrue(lru.ContainsKey("k3"));
Assert.IsTrue(lru.ContainsKey("k4"));
Assert.IsTrue(lru.ContainsKey("k5"));
}
public void Remove_ItemIsRemoved_ContainsKeyReturnsFalse()
{
var lru = new LruCache<string, string>(1);
lru.Add("k1", "v1");
lru.Remove("k1");
Assert.IsFalse(lru.ContainsKey("k1"));
}
