public SizeTracker(uint shardId, IPersistentStore store, IClock clock, PersistentCacheOptions options)
{
this.shardId = shardId;
this.store = store;
this.options = options;
this.clock = clock;
}
public Evicter(uint shardId, IPersistentStore store, UsageTracker usage, CacheKeyHasher hasher, IClock clock, PersistentCacheOptions options, CancellationTokenSource shutdownTokenSource)
{
this.shardId = shardId;
this.store = store;
this.usage = usage;
this.clock = clock;
this.options = options;
this.shutdownTokenSource = shutdownTokenSource;
this.hasher = hasher;
sizeTracker = new SizeTracker(shardId, store, clock, options);
}
public async void TestDiskChurn()
{
var path = Path.Combine(Path.GetTempPath(), $"{Guid.NewGuid()}");
Directory.CreateDirectory(path);
var store = new PersistentDiskStore(path);
var settings = new PersistentCacheOptions()
{
FreeSpacePercentGoal = 50,
MaxCachedBytes = 1000,
MaxWriteLogSize = 800,
WriteLogFlushIntervalMs = 1,
ReadInfoFlushIntervalMs = 1,
ShardCount = 1,
};
var clock = new CacheClock(); //new FakeClock("2020-05-25");
var cache = new PersistentCache(store, clock, settings);
try
{
await cache.StartAsync(CancellationToken.None);
var dataBytes = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
for (int i = 0; i < 10; i++)
{
var key = new CacheKey
{
Key1 = Encoding.UTF8.GetBytes($"file{i}.jpg"),
Key2 = Encoding.UTF8.GetBytes("2020-05-25 00:00:00"),
Key3 = Encoding.UTF8.GetBytes("?width=200"),
};
cache.PutBytesEventually(key, dataBytes, 1);
}
await cache.FlushWrites();
//Thread.Sleep(50);
//clock.AdvanceSeconds(45);
Thread.Sleep(2000);
await cache.FlushWrites();
for (int i = 0; i < 10; i++)
{
var key = new CacheKey
{
Key1 = Encoding.UTF8.GetBytes($"file{i}.jpg"),
Key2 = Encoding.UTF8.GetBytes("2020-05-25 00:00:00"),
Key3 = Encoding.UTF8.GetBytes("?width=200"),
};
using (var stream = await cache.GetStream(key, CancellationToken.None))
{
Assert.Equal(0, stream.ReadByte());
Assert.Equal(1, stream.ReadByte());
}
}
var exceptions = cache.PopExceptions();
foreach (var e in exceptions)
{
throw e;
}
await cache.StopAsync(CancellationToken.None);
}
finally
{
try
{
await cache.StopAsync(CancellationToken.None);
}
finally
{
Directory.Delete(path, true);
}
}
}
