An StackExchange.Redis assistant class for .NET Core.
Install-Package StackExchange.Redis// ... other services
services.AddRedisHelper(options =>
{
options.DatabaseId = 0; // Your Redis database id
options.Configurations = new ConfigurationOptions() // Your Redis configurations
options.Configurations.EndPoints.Add("localhost", 6379); // Your Redis server
})Inject ICacheProvider to your class constructor and use it.
- GetAsync
- SetAsync
- ExistsAsync
- DeleteAsync
- IncrementAsync
- DecrementAsync
- ExpireAsync
- Scan
- FlushAsync
- BatchAsync
PublishAsync[Experimental]SubscribeAsync[Experimental]
1) When you want to get a cached data, and settle it to a certain model:
public async Task<FooModel> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var cache = await _cacheProvider.GetAsync<FooModel>(cacheKey);
if (cache.IsNull)
return null;
return cache.Value;
}1.1) But if need a certain field:
public async Task<string> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var cache = await _cacheProvider.GetAsync<FooModel>(cacheKey, "name");
if (cache.IsNull)
return null;
return cache.Value.Name;
}fields param is a params string[] type, so you can get multiple fields at once (case-insensitive)
3) When you want to get a cached data, without knowing its type:
public async Task<Dictionary<string, RedisCacheValue>> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var cache = await _cacheProvider.GetAsync(cacheKey);
if (cache.IsNull)
return null;
return cache.Value;
}1) When you want to set cache, from a certain model:
public class FooModel
{
public string Name { get; set; }
}
public async Task FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var model = new FooModel { Name = "Arash" };
await _cacheProvider.SetAsync<FooModel>(cacheKey, model);
}2) When you want to set cache, without knowing its type:
public async Task FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var cached = await _cacheProvider.SetAsync(cacheKey, new { name = "Arash" });
if (cached.IsNull || !cached.Value)
throw new Exception("Something went wrong!");
// Operation is done successfully
}3) When you want to set cache for a certain field:
public async Task FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var cached = await _cacheProvider.SetAsync(cacheKey, "name", "Arash");
if (cached.IsNull || !cached.Value)
throw new Exception("Something went wrong!");
// Operation is done successfully
}When you want to check if a cache key exists:
public async Task<bool> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var exists = await _cacheProvider.ExistsAsync(cacheKey);
return exists;
}1) When you want to delete a cached key:
public async Task<bool> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var deleted = await _cacheProvider.DeleteAsync(cacheKey);
if (deleted.IsNull)
throw new Exception("Something went wrong!");
return deleted.Value;
}2) When you want to delete a cached hash key:
public async Task<bool> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var deleted = await _cacheProvider.DeleteAsync(cacheKey, "name");
if (deleted.IsNull)
throw new Exception("Something went wrong!");
return deleted.Value;
}1) When you want to increment a cached key:
public async Task<long> FooAsync()
{
var cacheKey = new RedisKey("foo");
var updatedValue = await _cacheProvider.IncrementAsync(cacheKey, 1);
if (updatedValue.IsNull)
throw new Exception("Something went wrong!");
return updatedValue.Value;
}2) When you want to increment a cached hash key:
public async Task<long> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var updatedValue = await _cacheProvider.IncrementAsync(cacheKey, "retry", 1);
if (updatedValue.IsNull)
throw new Exception("Something went wrong!");
return updatedValue.Value;
}1) When you want to decrement a cached key:
public async Task<long> FooAsync()
{
var cacheKey = new RedisKey("foo");
var updatedValue = await _cacheProvider.DecrementAsync(cacheKey, 1);
if (updatedValue.IsNull)
throw new Exception("Something went wrong!");
return updatedValue.Value;
}Also, you can set a minimum value to avoid the cached value to be decremented below that value.
2) When you want to increment a cached hash key
public async Task<long> FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var updatedValue = await _cacheProvider.DecrementAsync(cacheKey, "retry", 1);
if (updatedValue.IsNull)
throw new Exception("Something went wrong!");
return updatedValue.Value;
}When you want to set expire time for a cached key:
public async Task FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
var set = await _cacheProvider.ExpireAsync(cacheKey, TimeSpan.FromSeconds(10));
if (set.IsNull || !set.Value)
throw new Exception("Something went wrong!");
// Operation is done successfully
}When you want to scan a pattern: [Not Recommended]
public RedisCacheKey[] FooAsync()
{
var paginatedCachedData = _cacheProvider.Scan("foo:*", 100);
return paginatedCachedData;
}* Be careful while using this method. It is only recommended for development *
When you want to flush all cached data:
public async Task FooAsync()
{
await _cacheProvider.FlushAsync();
}1) When you want to execute multiple commands at once:
public async Task FooAsync()
{
var cacheKey = new RedisKey("foo:bar");
await _cacheProvider.BatchAsync(b =>
{
b.Set(cacheKey, "name", "Arash");
b.Set(cacheKey, "age", 33);
});
}2) When you want to read multiple cached data at once:
public class FooModel
{
public string Name { get; set; }
public int Age { get; set; }
}
public async Task<FooModel[]> FooAsync()
{
var readCached = await _cacheProvider.BatchAsync<FooModel>(b =>
{
b.Get(new RedisKey("foo:bar"));
b.Get(new RedisKey("foo:bar2"));
});
if (!readCached.Any() || readCached.All(x => x.IsNull))
return Array.Empty<FooModel>();
return readCached.Select(x => x.Value).ToArray();
}The last param of most of the methods is fireAndForget, so you can set it to true if you don't want to wait for the result.
the default value is true.
Thanks to Ali Meshkini for writing unit tests:v:
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