public async Task DistributedCacheCircuitBreakerActuallyWorksAsync()
{
var circuitBreakerDuration = TimeSpan.FromSeconds(2);
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
var chaosDistributedCache = new ChaosDistributedCache(distributedCache);
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
using (var fusionCache = new FusionCache(new FusionCacheOptions()
{
DistributedCacheCircuitBreakerDuration = circuitBreakerDuration
}, memoryCache))
{
fusionCache.DefaultEntryOptions.AllowBackgroundDistributedCacheOperations = false;
fusionCache.SetupDistributedCache(chaosDistributedCache, new FusionCacheNewtonsoftJsonSerializer());
await fusionCache.SetAsync <int>("foo", 1, options => options.SetDurationSec(60).SetFailSafe(true));
chaosDistributedCache.SetAlwaysThrow();
await fusionCache.SetAsync <int>("foo", 2, options => options.SetDurationSec(60).SetFailSafe(true));
chaosDistributedCache.SetNeverThrow();
await fusionCache.SetAsync <int>("foo", 3, options => options.SetDurationSec(60).SetFailSafe(true));
await Task.Delay(circuitBreakerDuration).ConfigureAwait(false);
memoryCache.Remove("foo");
var res = await fusionCache.GetOrDefaultAsync <int>("foo", -1);
Assert.Equal(1, res);
}
}
}
public async Task FusionCache_MemoryProviderAsync()
{
var fusionCache = new FusionCache(new FusionCacheOptions());
await LoopActionAsync(Iterations, async() =>
{
await fusionCache.SetAsync("TestKey", 123, TimeSpan.FromDays(1));
await fusionCache.GetOrDefaultAsync <int>("TestKey");
await fusionCache.GetOrSetAsync("TestKey", (cancellationToken) => Task.FromResult("Hello World"), TimeSpan.FromDays(1));
});
}
public async Task HandlesFlexibleComplexTypeConversionsAsync(SerializerType serializerType)
{
using (var memoryCache = new MemoryCache(new MemoryCacheOptions()))
{
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
using (var fusionCache = new FusionCache(new FusionCacheOptions(), memoryCache).SetupDistributedCache(distributedCache, GetSerializer(serializerType)))
{
var initialValue = (object)SampleComplexObject.CreateRandom();
await fusionCache.SetAsync("foo", initialValue, TimeSpan.FromHours(24));
memoryCache.Remove("foo");
var newValue = await fusionCache.GetOrDefaultAsync <SampleComplexObject>("foo");
Assert.NotNull(newValue);
}
}
}
async static Task Main(string[] args)
{
var cacheDurationSec = 5;
var failSafeMaxDurationSec = 30;
var failSafeThrottleDurationSec = 3;
var factoryTimeoutMs = 2_000;
var useFailSafe = true;
var useDistributedCache = true;
Console.OutputEncoding = Encoding.UTF8;
// DI
var services = new ServiceCollection();
SetupSerilogLogger(services);
//SetupStandardLogger(services);
var serviceProvider = services.BuildServiceProvider();
var logger = serviceProvider.GetService <ILogger <FusionCache> >();
// CACHE OPTIONS
var options = new FusionCacheOptions
{
CacheKeyPrefix = "dev:",
DefaultEntryOptions = new FusionCacheEntryOptions
{
Duration = TimeSpan.FromSeconds(cacheDurationSec),
FailSafeMaxDuration = TimeSpan.FromSeconds(failSafeMaxDurationSec),
FailSafeThrottleDuration = TimeSpan.FromSeconds(failSafeThrottleDurationSec),
Priority = CacheItemPriority.NeverRemove,
IsFailSafeEnabled = useFailSafe,
FactorySoftTimeout = TimeSpan.FromMilliseconds(factoryTimeoutMs),
AllowBackgroundDistributedCacheOperations = true
},
};
using (var fusionCache = new FusionCache(options, logger: logger))
{
if (useDistributedCache)
{
// DISTRIBUTED CACHE
var serializer = new FusionCacheNewtonsoftJsonSerializer();
var distributedCache = new MemoryDistributedCache(Options.Create(new MemoryDistributedCacheOptions()));
Console.WriteLine();
fusionCache.SetupDistributedCache(distributedCache, serializer);
Console.WriteLine();
}
await fusionCache.SetAsync <int>("foo", 42, options => options.SetDurationSec(1).SetFailSafe(true, TimeSpan.FromMinutes(1)));
Console.WriteLine();
Console.WriteLine($"initial: {fusionCache.GetOrDefault<int>("foo")}");
await Task.Delay(1_500);
Console.WriteLine();
var tmp1 = await fusionCache.GetOrSetAsync <int>("foo", async _ => { await Task.Delay(2_000); return(21); }, options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
Console.WriteLine($"tmp1: {tmp1}");
await Task.Delay(2_500);
Console.WriteLine();
var tmp2 = await fusionCache.GetOrDefaultAsync <int>("foo", options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
Console.WriteLine($"tmp2: {tmp2}");
await Task.Delay(2_500);
Console.WriteLine();
var tmp3 = await fusionCache.GetOrSetAsync <int>("foo", async _ => { await Task.Delay(2_000); throw new Exception("Sloths are cool"); }, options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
Console.WriteLine($"tmp3: {tmp3}");
await Task.Delay(2_500);
Console.WriteLine();
var tmp4 = await fusionCache.GetOrSetAsync <int>("foo", async _ => { await Task.Delay(2_000); return(666); }, options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000, keepTimedOutFactoryResult: false));
Console.WriteLine();
Console.WriteLine($"tmp4: {tmp4}");
await Task.Delay(2_500);
Console.WriteLine();
var tmp5 = await fusionCache.GetOrDefaultAsync <int>("foo", options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
Console.WriteLine($"tmp5: {tmp5}");
Console.WriteLine();
await fusionCache.SetAsync("foo", 123, fusionCache.CreateEntryOptions(entry => entry.SetDurationSec(1).SetFailSafe(true)));
await Task.Delay(1_500);
Console.WriteLine();
await fusionCache.GetOrSetAsync <int>("foo", _ => { throw new Exception("Foo"); }, options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
await fusionCache.SetAsync("foo", 123, options => options.SetDurationSec(1).SetFailSafe(true));
await Task.Delay(1_500);
Console.WriteLine();
await fusionCache.GetOrSetAsync <int>("foo", async _ => { await Task.Delay(2_000); throw new Exception("Foo"); }, options => options.SetDurationSec(1).SetFailSafe(true).SetFactoryTimeouts(1_000));
Console.WriteLine();
await Task.Delay(2_500);
Console.WriteLine("THE END");
}
}