public void CacheKeepsMostRecentlyUsedItems()
{
var cache = new MemoryCountCache <int, string>(10);
for (int i = 0; i < 15; i++)
{
cache.AddOrUpdate(i, RandomUtils.GetInt32().ToString());
if (i == 8)
{
// Use first 3 items.
for (int k = 0; k < 3; ++k)
{
cache.TryGetValue(k, out string unused);
}
}
}
// Cache should have 0-2 & 8-14.
for (int i = 0; i < 15; i++)
{
bool success = cache.TryGetValue(i, out string unused);
if (i < 3 || i > 7)
{
Assert.True(success);
}
else
{
Assert.False(success);
}
}
Assert.Equal(10, cache.Count);
}
public RocksDbChainStore(Network network, DataFolder dataFolder, ChainIndexer chainIndexer)
{
this.dataFolder = dataFolder.ChainPath;
this.network = network;
this.ChainIndexer = chainIndexer;
this.headers = new MemoryCountCache <uint256, BlockHeader>(601);
this.locker = new object();
this.dbOptions = new DbOptions().SetCreateIfMissing(true);
this.rocksDb = RocksDb.Open(this.dbOptions, this.dataFolder);
}
public RocksdbChainStore(Network network, DataFolder dataFolder, ChainIndexer chainIndexer)
{
this.network = network;
this.ChainIndexer = chainIndexer;
this.nearTipHeaders = new MemoryCountCache <uint256, BlockHeader>(601);
this.recentHeaders = new MemoryCountCache <uint256, BlockHeader>(100);
this.locker = new object();
// Open a connection to a new DB and create if not found
var options = new DbOptions().SetCreateIfMissing(true);
this.rocksdb = RocksDb.Open(options, dataFolder.ChainPath);
}
public void CacheDoesNotExceedMaxItemsLimit()
{
int maxItemsCount = 100;
var cache = new MemoryCountCache <int, string>(maxItemsCount);
for (int i = 0; i < maxItemsCount * 2; i++)
{
cache.AddOrUpdate(i, RandomUtils.GetInt32().ToString());
}
Assert.Equal(maxItemsCount, cache.Count);
}
public LevelDbChainStore(Network network, DataFolder dataFolder, ChainIndexer chainIndexer)
{
this.network = network;
this.ChainIndexer = chainIndexer;
this.headers = new MemoryCountCache <uint256, BlockHeader>(601);
this.locker = new object();
// Open a connection to a new DB and create if not found
var options = new Options {
CreateIfMissing = true
};
this.leveldb = new DB(options, dataFolder.ChainPath);
}
public void CacheKeepsMostRecentlyAddedItemsNoneWereUsed()
{
int maxItemsCount = 10;
int itemsCountToAdd = 100;
var cache = new MemoryCountCache <int, string>(maxItemsCount);
for (int i = 0; i < itemsCountToAdd; i++)
{
cache.AddOrUpdate(i, RandomUtils.GetInt32().ToString());
}
for (int i = itemsCountToAdd - maxItemsCount; i < itemsCountToAdd; i++)
{
bool success = cache.TryGetValue(i, out string value);
Assert.True(success);
}
Assert.Equal(maxItemsCount, cache.Count);
}
public void CanManuallyRemoveItemsFromTheCache()
{
var cache = new MemoryCountCache <int, string>(10);
for (int i = 0; i < 5; i++)
{
cache.AddOrUpdate(i, i + "VALUE");
}
for (int i = 0; i < 3; i++)
{
cache.Remove(i);
}
Assert.Equal(2, cache.Count);
// Check if cache still has the same values that were added.
for (int i = 3; i < 5; i++)
{
cache.TryGetValue(i, out string value);
Assert.Equal(i + "VALUE", value);
}
}
