If you want to access the cache outside of a Service (i.e. a class that inherits from ServiceStack.ServiceInterface
) then you can use the IoC resolve method to get the instance of the cache.
Configure Cache Provider:
First you need to register your cache provider with the IoC in the Configure
method of your AppHost
. ServiceStack supports a number of providers. (In-memory, Redis, OrmLite, Memcached, Azure). See here for details on how to configure the required provider. The example below uses in-memory caching.
public override void Configure(Funq.Container container)
{
// Choose the Cache Provider you want to use
// i.e. Register in Memory Cache Client
container.Register<ICacheClient>(new MemoryCacheClient());
}
Resolve the ICacheClient:
Then when you want to use the cache outside of the Service, then you should try resolve the ICacheClient
using the HostContext
:
var cache = HostContext.TryResolve<ICacheClient>();
if(cache != null)
{
// Use the cache object
cache.Add<string>("Key","Value");
var value = cache.Get<string>("Key");
}
ICacheClient provided methods:
This will provide you with access to the cache. ICacheClient
defines these methods (Original commented interface definition here):
public interface ICacheClient : IDisposable
{
bool Remove(string key);
void RemoveAll(IEnumerable<string> keys);
T Get<T>(string key);
long Increment(string key, uint amount);
long Decrement(string key, uint amount);
bool Add<T>(string key, T value);
bool Set<T>(string key, T value);
bool Replace<T>(string key, T value);
bool Add<T>(string key, T value, DateTime expiresAt);
bool Set<T>(string key, T value, DateTime expiresAt);
bool Replace<T>(string key, T value, DateTime expiresAt);
bool Add<T>(string key, T value, TimeSpan expiresIn);
bool Set<T>(string key, T value, TimeSpan expiresIn);
bool Replace<T>(string key, T value, TimeSpan expiresIn);
void FlushAll();
IDictionary<string, T> GetAll<T>(IEnumerable<string> keys);
void SetAll<T>(IDictionary<string, T> values);
}
Cast as your Cache Provider Client:
You can also cast the client to the specific type of your provider, for it's full functionality. For example if we were using the Redis Cache:
var cache = HostContext.TryResolve<ICacheClient>() as RedisClient; // Typed
if(cache != null)
{
var mySet = cache.GetAllItemsFromSet("MySetKey"); // Redis specific cache method
}
I hope this helps.