SerializingCacheProviderAsync<TResult, TSerialized>
Defines an IAsyncCacheProvider<T> which serializes objects of type TResult in and out of an underlying cache which caches as type TSerialized. For use with asynchronous CachePolicy.
using System;
using System.Threading;
using System.Threading.Tasks;
namespace Polly.Caching
{
public class SerializingCacheProviderAsync<TResult, TSerialized> : IAsyncCacheProvider<TResult>
{
private readonly IAsyncCacheProvider<TSerialized> _wrappedCacheProvider;
private readonly ICacheItemSerializer<TResult, TSerialized> _serializer;
public SerializingCacheProviderAsync(IAsyncCacheProvider<TSerialized> wrappedCacheProvider, ICacheItemSerializer<TResult, TSerialized> serializer)
{
if (wrappedCacheProvider == null)
throw new ArgumentNullException("wrappedCacheProvider");
_wrappedCacheProvider = wrappedCacheProvider;
if (serializer == null)
throw new ArgumentNullException("serializer");
_serializer = serializer;
}
public async Task<TResult> GetAsync(string key, CancellationToken cancellationToken, bool continueOnCapturedContext)
{
TSerialized val = await this._wrappedCacheProvider.GetAsync(key, cancellationToken, continueOnCapturedContext).ConfigureAwait(continueOnCapturedContext);
return (val == null || val.Equals(default(TSerialized))) ? default(TResult) : this._serializer.Deserialize(val);
}
public async Task PutAsync(string key, TResult value, Ttl ttl, CancellationToken cancellationToken, bool continueOnCapturedContext)
{
if (value != null && !value.Equals(default(TResult)))
await this._wrappedCacheProvider.PutAsync(key, this._serializer.Serialize(value), ttl, cancellationToken, continueOnCapturedContext).ConfigureAwait(continueOnCapturedContext);
}
}
}