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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace Microsoft.Extensions.Caching.Distributed
{
/// <summary>
/// Extension methods for setting data in an <see cref="IDistributedCache" />.
/// </summary>
public static class DistributedCacheExtensions
{
/// <summary>
/// Sets a sequence of bytes in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static void Set(this IDistributedCache cache, string key, byte[] value)
{
ThrowHelper.ThrowIfNull(key);
ThrowHelper.ThrowIfNull(value);
cache.Set(key, value, new DistributedCacheEntryOptions());
}
/// <summary>
/// Asynchronously sets a sequence of bytes in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <param name="token">Optional. A <see cref="CancellationToken" /> to cancel the operation.</param>
/// <returns>A task that represents the asynchronous set operation.</returns>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static Task SetAsync(this IDistributedCache cache, string key, byte[] value, CancellationToken token = default(CancellationToken))
{
ThrowHelper.ThrowIfNull(key);
ThrowHelper.ThrowIfNull(value);
return cache.SetAsync(key, value, new DistributedCacheEntryOptions(), token);
}
/// <summary>
/// Sets a string in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static void SetString(this IDistributedCache cache, string key, string value)
{
cache.SetString(key, value, new DistributedCacheEntryOptions());
}
/// <summary>
/// Sets a string in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <param name="options">The cache options for the entry.</param>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static void SetString(this IDistributedCache cache, string key, string value, DistributedCacheEntryOptions options)
{
ThrowHelper.ThrowIfNull(key);
ThrowHelper.ThrowIfNull(value);
cache.Set(key, Encoding.UTF8.GetBytes(value), options);
}
/// <summary>
/// Asynchronously sets a string in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <param name="token">Optional. A <see cref="CancellationToken" /> to cancel the operation.</param>
/// <returns>A task that represents the asynchronous set operation.</returns>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static Task SetStringAsync(this IDistributedCache cache, string key, string value, CancellationToken token = default(CancellationToken))
{
return cache.SetStringAsync(key, value, new DistributedCacheEntryOptions(), token);
}
/// <summary>
/// Asynchronously sets a string in the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to store the data in.</param>
/// <param name="value">The data to store in the cache.</param>
/// <param name="options">The cache options for the entry.</param>
/// <param name="token">Optional. A <see cref="CancellationToken" /> to cancel the operation.</param>
/// <returns>A task that represents the asynchronous set operation.</returns>
/// <exception cref="System.ArgumentNullException"><paramref name="key"/> or <paramref name="value"/> is null.</exception>
public static Task SetStringAsync(this IDistributedCache cache, string key, string value, DistributedCacheEntryOptions options, CancellationToken token = default(CancellationToken))
{
ThrowHelper.ThrowIfNull(key);
ThrowHelper.ThrowIfNull(value);
return cache.SetAsync(key, Encoding.UTF8.GetBytes(value), options, token);
}
/// <summary>
/// Gets a string from the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to get the stored data for.</param>
/// <returns>The string value from the stored cache key.</returns>
public static string? GetString(this IDistributedCache cache, string key)
{
byte[]? data = cache.Get(key);
if (data == null)
{
return null;
}
return Encoding.UTF8.GetString(data, 0, data.Length);
}
/// <summary>
/// Asynchronously gets a string from the specified cache with the specified key.
/// </summary>
/// <param name="cache">The cache in which to store the data.</param>
/// <param name="key">The key to get the stored data for.</param>
/// <param name="token">Optional. A <see cref="CancellationToken" /> to cancel the operation.</param>
/// <returns>A task that gets the string value from the stored cache key.</returns>
public static async Task<string?> GetStringAsync(this IDistributedCache cache, string key, CancellationToken token = default(CancellationToken))
{
byte[]? data = await cache.GetAsync(key, token).ConfigureAwait(false);
if (data == null)
{
return null;
}
return Encoding.UTF8.GetString(data, 0, data.Length);
}
}
}
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