private static string GetCacheItemKey(Type objectType, ObjectCacheAttribute cachingAttribute)
{
//determine entry key
var key = string.Format("{0}.{1}", objectType.Namespace, objectType.Name);
if (cachingAttribute.Scope == CacheScope.Group)
{
var group = Csla.ApplicationContext.ClientContext[CacheGroup];
if (group == null)
{
throw new Exception("ClientContext group required for Group scope data caching");
}
key = string.Format("{0}::{1}", key, group);
}
else if (cachingAttribute.Scope == CacheScope.User)
{
var group = Csla.ApplicationContext.ClientContext[CacheGroup];
if (group == null)
{
group = string.Empty; //allow user scope with or without a specified grouping
}
var user = Csla.ApplicationContext.User;
if (!user.Identity.IsAuthenticated)
{
throw new Exception("Authenticated user required for User scope data caching");
}
key = string.Format("{0}::{1}::{2}", key, group, user.Identity.Name);
}
return(key);
}
public async Task <DataPortalResult> Fetch(Type objectType, object criteria, DataPortalContext context, bool isSync)
{
var cachingAttribute = ObjectCacheAttribute.GetObjectCacheAttribute(objectType);
var cacheProvider = CacheManager.GetCacheProvider();
if (cachingAttribute != null && cacheProvider != null)
{
//get scenario details
var scope = cachingAttribute.Scope;
var cacheByCriteria = cachingAttribute.CacheByCriteria;
var expiration = cachingAttribute.Expiration;
//get key
var key = GetCacheItemKey(objectType, cachingAttribute);
//include criteria hash if needed
if (cachingAttribute.CacheByCriteria)
{
key = string.Format("{0}::{1}", key, criteria.GetHashCode());
}
var data = cacheProvider.Get(key);
if (data == null)
{
//cache miss
proxy = GetDataPortalProxy();
var results = await proxy.Fetch(objectType, criteria, context, isSync);
if (expiration > 0)
{
cacheProvider.Put(key, results.ReturnObject, new TimeSpan(0, expiration, 0));
}
else
{
cacheProvider.Put(key, results.ReturnObject);
}
return(results);
}
else
{
//cache hit
#if !NET45 && !NET46
await TaskEx.Delay(0);
#else
await Task.Delay(0);
#endif
return(new DataPortalResult(data));
}
}
else
{
proxy = GetDataPortalProxy();
return(await proxy.Fetch(objectType, criteria, context, isSync));
}
}
public DataPortalResult Fetch(Type objectType, object criteria, DataPortalContext context)
{
var cachingAttribute = ObjectCacheAttribute.GetObjectCacheAttribute(objectType);
var cacheProvider = CacheManager.GetCacheProvider();
if (cachingAttribute != null && cacheProvider != null)
{
//get scenario details
var scope = cachingAttribute.Scope;
var cacheByCriteria = cachingAttribute.CacheByCriteria;
var expiration = cachingAttribute.Expiration;
//get key
var key = GetCacheItemKey(objectType, cachingAttribute);
//include criteria hash if needed
if (cachingAttribute.CacheByCriteria)
{
key = string.Format("{0}::{1}", key, criteria.GetHashCode());
}
var data = cacheProvider.Get(key);
if (data == null)
{
//cache miss
proxy = GetDataPortalProxy();
var results = proxy.Fetch(objectType, criteria, context);
if (expiration > 0)
{
cacheProvider.Put(key, results, new TimeSpan(0, expiration, 0));
}
else
{
cacheProvider.Put(key, results);
}
return(results);
}
else
{
//cache hit
return((DataPortalResult)data);
}
}
else
{
proxy = GetDataPortalProxy();
return(proxy.Fetch(objectType, criteria, context));
}
}
private static string GetCacheItemKey(Type objectType, ObjectCacheAttribute cachingAttribute)
{
//determine entry key
var key = string.Format("{0}.{1}", objectType.Namespace, objectType.Name);
if (cachingAttribute.Scope == CacheScope.Group)
{
var group = Csla.ApplicationContext.ClientContext[CacheGroup];
if (group == null) throw new ApplicationException("ClientContext group required for Group scope data caching");
key = string.Format("{0}::{1}", key, group);
}
else if (cachingAttribute.Scope == CacheScope.User)
{
var group = Csla.ApplicationContext.ClientContext[CacheGroup];
if (group == null) group = string.Empty; //allow user scope with or without a specified grouping
var user = Csla.ApplicationContext.User;
if (!user.Identity.IsAuthenticated) throw new ApplicationException("Authenticated user required for User scope data caching");
key = string.Format("{0}::{1}::{2}", key, group, user.Identity.Name);
}
return key;
}
/// <summary>
/// Test cache system configuration and type declaration
/// </summary>
/// <param name="objectType">Target business object type</param>
/// <returns>True if configuration is valid and type has ObjectCacheAttribute; else false</returns>
public static bool IsCacheConfigured(Type objectType)
{
return(ObjectCacheAttribute.GetObjectCacheAttribute(objectType) != null && GetCacheProvider() != null);
}
