public static async Task InsertWithoutOverwriteAsync <T>(this IObjectBlobCache cache, string key, T value,
DateTimeOffset expiration) where T : class
{
await cache.Flush();
T fromCache;
try
{
fromCache = await cache.GetObject <T>(key);
}
catch (KeyNotFoundException)
{
fromCache = null;
}
if (fromCache != null)
{
await cache.InsertObject(key, value, expiration);
}
}
public static async Task InsertIfMoreDetailsAsync <T>(this IObjectBlobCache cache, string key, T value,
DateTimeOffset expiration) where T : class, IDetailLeveled
{
await cache.Flush();
IDetailLeveled fromCache;
try
{
fromCache = await cache.GetObject <T>(key);
}
catch (KeyNotFoundException)
{
fromCache = null;
}
var newValue = (IDetailLeveled)value;
if (fromCache == null || newValue.GetDetailLevel() >= fromCache.GetDetailLevel())
{
await cache.InsertObject(key, value, expiration);
}
}
public static async Task InsertAllIfMoreDetailsAsync <T>(this IObjectBlobCache cache,
IDictionary <string, T> keyValuePairs, DateTimeOffset expiration) where T : class, IDetailLeveled
{
await cache.Flush();
var toInsert = new Dictionary <string, T>();
foreach (var pair in keyValuePairs)
{
IDetailLeveled fromCache;
try
{
fromCache = await cache.GetObject <T>(pair.Key);
}
catch (KeyNotFoundException)
{
fromCache = null;
}
var newValue = (IDetailLeveled)pair.Value;
if (fromCache == null || newValue.GetDetailLevel() >= fromCache.GetDetailLevel())
{
toInsert.Add(pair.Key, pair.Value);
}
}
if (toInsert.Any())
{
try
{
await cache.InsertObjects(toInsert, expiration);
}
catch (Exception e)
{
ServiceLocator.Current.GetInstance <ILoggingService>().Report(e, cache);
}
}
}