private static T GetUsingRwLock <T>(IServiceCache cache, ServiceCacheRegistration registration, object tag, object[] values, string name, string @namespace, bool useDBNull)
{
_rwLock.EnterUpgradeableReadLock();
try
{
CacheItemHeader header;
var valueAsCache = cache.Get(tag, name, registration, out header);
if (valueAsCache != null && (!registration.UseHeaders || header != null))
{
return(!useDBNull || !(valueAsCache is DBNull) ? (T)valueAsCache : default(T));
}
_rwLock.EnterWriteLock();
try
{
valueAsCache = cache.Get(tag, name, registration, out header);
if (valueAsCache != null && (!registration.UseHeaders || header != null))
{
return(!useDBNull || !(valueAsCache is DBNull) ? (T)valueAsCache : default(T));
}
// create
var value = CreateData <T>(@namespace, registration, tag, values, out header);
valueAsCache = (!useDBNull || value != null ? (object)value : DBNull.Value);
cache.Add(tag, name, registration.ItemPolicy, valueAsCache, new ServiceCacheByDispatcher(registration, values, header));
return(value);
}
finally { _rwLock.ExitWriteLock(); }
}
finally { _rwLock.ExitUpgradeableReadLock(); }
}
private static void SetUsingLock(IServiceCache cache, ServiceCacheRegistration registration, object tag, CacheItemHeader header, bool useDBNull, object value)
{
lock (_rwLock)
{
var valueAsCache = (!useDBNull || value != null ? (object)value : DBNull.Value);
cache.Add(tag, header.Item, registration.ItemPolicy, valueAsCache, new ServiceCacheByDispatcher(registration, header.Values, header));
}
}
private static void SetUsingRwLock(IServiceCache cache, ServiceCacheRegistration registration, object tag, CacheItemPolicy itemPolicy, CacheItemHeader header, bool useDBNull, object value)
{
_rwLock.EnterWriteLock();
try
{
var valueAsCache = (!useDBNull || value != null ? (object)value : DBNull.Value);
cache.Add(tag, header.Item, itemPolicy, valueAsCache, new ServiceCacheByDispatcher(registration, header.Values, header));
}
finally { _rwLock.ExitWriteLock(); }
}
private static T CreateData <T>(string @namespace, ServiceCacheRegistration registration, object tag, object[] values, out CacheItemHeader header)
{
if (@namespace != null)
{
var namespaces = registration.Namespaces;
if (!namespaces.Contains(@namespace))
{
namespaces.Add(@namespace);
}
}
header = new CacheItemHeader {
Values = values,
};
return((T)registration.Builder(tag, values));
}
private static T GetUsingCas <T>(IDistributedServiceCache cache, ServiceCacheRegistration registration, object tag, object[] values, string name, string @namespace, bool useDBNull)
{
CacheItemHeader header;
var valueAsCache = cache.Get(tag, name, registration, out header);
if (valueAsCache != null && (!registration.UseHeaders || header != null))
{
return(!useDBNull || !(valueAsCache is DBNull) ? (T)valueAsCache : default(T));
}
// create
var value = CreateData <T>(@namespace, registration, tag, values, out header);
valueAsCache = (!useDBNull || value != null ? (object)value : DBNull.Value);
cache.Add(tag, name, registration.ItemPolicy, valueAsCache, new ServiceCacheByDispatcher(registration, values, header));
return(value);
}
/// <summary>
/// Gets the query.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="registration">The registration.</param>
/// <param name="tag">The tag.</param>
/// <param name="values">The values.</param>
/// <returns></returns>
public static IQueryable <T> GetQuery <T>(ServiceCacheRegistration registration, object tag, object[] values)
{
return(ServiceCacheManager.Current.Get <IQueryable <T> >(registration, tag, values));
}
