public async Task AppliesDistributedCacheSoftTimeoutAsync()
{
var simulatedDelayMs = 5_000;
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
var chaosDistributedCache = new ChaosDistributedCache(distributedCache);
chaosDistributedCache.SetAlwaysDelayExactly(TimeSpan.FromMilliseconds(simulatedDelayMs));
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
using (var fusionCache = new FusionCache(new FusionCacheOptions(), memoryCache))
{
fusionCache.SetupDistributedCache(chaosDistributedCache, new FusionCacheNewtonsoftJsonSerializer());
await fusionCache.SetAsync <int>("foo", 42, new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true));
await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
var sw = Stopwatch.StartNew();
var res = await fusionCache.GetOrSetAsync <int>("foo", async ct => throw new Exception("Sloths are cool"), new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true).SetDistributedCacheTimeouts(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(1_000)));
sw.Stop();
Assert.Equal(42, res);
Assert.True(sw.ElapsedMilliseconds >= 100, "Distributed cache soft timeout not applied");
Assert.True(sw.ElapsedMilliseconds < simulatedDelayMs, "Distributed cache soft timeout not applied");
}
}
}
public void AppliesDistributedCacheHardTimeout()
{
var simulatedDelayMs = 5_000;
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
var chaosDistributedCache = new ChaosDistributedCache(distributedCache);
chaosDistributedCache.SetAlwaysDelayExactly(TimeSpan.FromMilliseconds(simulatedDelayMs));
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
using (var fusionCache = new FusionCache(new FusionCacheOptions(), memoryCache))
{
fusionCache.SetupDistributedCache(chaosDistributedCache, new FusionCacheNewtonsoftJsonSerializer());
fusionCache.Set <int>("foo", 42, new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true));
Thread.Sleep(TimeSpan.FromSeconds(1));
memoryCache.Remove("foo");
Assert.Throws <Exception>(() =>
{
_ = fusionCache.GetOrSet <int>("foo", ct => throw new Exception("Sloths are cool"), new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true).SetDistributedCacheTimeouts(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(1_000)));
});
}
}
}
public async Task AppliesDistributedCacheHardTimeoutAsync()
{
var simulatedDelayMs = 5_000;
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
var chaosDistributedCache = new ChaosDistributedCache(distributedCache);
chaosDistributedCache.SetAlwaysDelayExactly(TimeSpan.FromMilliseconds(simulatedDelayMs));
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
using (var fusionCache = new FusionCache(new FusionCacheOptions(), memoryCache))
{
fusionCache.SetupDistributedCache(chaosDistributedCache, new FusionCacheNewtonsoftJsonSerializer());
await fusionCache.SetAsync <int>("foo", 42, new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true));
await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
memoryCache.Remove("foo");
await Assert.ThrowsAsync <Exception>(async() =>
{
var res = await fusionCache.GetOrSetAsync <int>("foo", async ct => throw new Exception("Sloths are cool"), new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true).SetDistributedCacheTimeouts(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(1_000)));
});
}
}
}
public void AppliesDistributedCacheSoftTimeout(SerializerType serializerType)
{
var simulatedDelayMs = 5_000;
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
var chaosDistributedCache = new ChaosDistributedCache(distributedCache);
chaosDistributedCache.SetAlwaysDelayExactly(TimeSpan.FromMilliseconds(simulatedDelayMs));
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
using (var fusionCache = new FusionCache(new FusionCacheOptions(), memoryCache))
{
fusionCache.SetupDistributedCache(chaosDistributedCache, GetSerializer(serializerType));
fusionCache.Set <int>("foo", 42, new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true));
Thread.Sleep(TimeSpan.FromSeconds(1));
var sw = Stopwatch.StartNew();
var res = fusionCache.GetOrSet <int>("foo", ct => throw new Exception("Sloths are cool"), new FusionCacheEntryOptions().SetDurationSec(1).SetFailSafe(true).SetDistributedCacheTimeouts(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(1_000)));
sw.Stop();
Assert.Equal(42, res);
Assert.True(sw.ElapsedMilliseconds >= 100, "Distributed cache soft timeout not applied");
Assert.True(sw.ElapsedMilliseconds < simulatedDelayMs, "Distributed cache soft timeout not applied");
}
}
}