public DistributedCacheAccessor(IDistributedCache?distributedCache, IFusionCacheSerializer?serializer, FusionCacheOptions options, ILogger?logger)
{
Cache = distributedCache;
Serializer = serializer;
_options = options;
_breakDuration = distributedCache is null ? TimeSpan.Zero : options.DistributedCacheCircuitBreakerDuration;
_breakDurationTicks = _breakDuration.Ticks;
_gatewayTicks = DateTimeOffset.MinValue.Ticks;
_logger = logger;
}
public MemoryCacheAccessor(IMemoryCache?memoryCache, FusionCacheOptions options, ILogger?logger)
{
if (memoryCache is object)
{
_cache = memoryCache;
}
else
{
_cache = new MemoryCache(new MemoryCacheOptions());
_cacheShouldBeDisposed = true;
}
_options = options;
_logger = logger;
}
public DistributedCacheAccessor(IDistributedCache distributedCache, IFusionCacheSerializer serializer, FusionCacheOptions options, ILogger?logger)
{
if (distributedCache == null)
{
throw new ArgumentNullException(nameof(distributedCache));
}
if (serializer == null)
{
throw new ArgumentNullException(nameof(serializer));
}
_cache = distributedCache;
_serializer = serializer;
_options = options;
_breakDuration = distributedCache is null ? TimeSpan.Zero : options.DistributedCacheCircuitBreakerDuration;
_breakDurationTicks = _breakDuration.Ticks;
_gatewayTicks = DateTimeOffset.MinValue.Ticks;
_logger = logger;
}
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");
}
}