internal static CacheManagerConfiguration LoadFromSection(CacheManagerSection section, string configName)
{
NotNullOrWhiteSpace(configName, nameof(configName));
var handleDefsSection = section.CacheHandleDefinitions;
Ensure(handleDefsSection.Count > 0, "There are no cache handles defined.");
// load handle definitions as lookup
var handleDefs = new SortedList <string, CacheHandleConfiguration>();
foreach (CacheHandleDefinition def in handleDefsSection)
{
//// don't validate at this point, otherwise we will get an exception if any defined handle doesn't match with the requested type...
//// CacheReflectionHelper.ValidateCacheHandleGenericTypeArguments(def.HandleType, cacheValue);
var normId = def.Id.ToUpper(CultureInfo.InvariantCulture);
handleDefs.Add(
normId,
new CacheHandleConfiguration(def.Id)
{
HandleType = def.HandleType,
ExpirationMode = def.DefaultExpirationMode,
ExpirationTimeout = GetTimeSpan(def.DefaultTimeout, "defaultTimeout")
});
}
// retrieve the handles collection with the correct name
CacheManagerHandleCollection managerCfg = section.CacheManagers.FirstOrDefault(p => p.Name.Equals(configName, StringComparison.OrdinalIgnoreCase));
EnsureNotNull(managerCfg, "No cache manager configuration found for name [{0}]", configName);
int?maxRetries = managerCfg.MaximumRetries;
if (maxRetries.HasValue && maxRetries.Value <= 0)
{
throw new InvalidOperationException("Maximum number of retries must be greater than zero.");
}
int?retryTimeout = managerCfg.RetryTimeout;
if (retryTimeout.HasValue && retryTimeout.Value < 0)
{
throw new InvalidOperationException("Retry timeout must be greater than or equal to zero.");
}
// build configuration
var cfg = new CacheManagerConfiguration(managerCfg.UpdateMode, maxRetries.HasValue ? maxRetries.Value : int.MaxValue, retryTimeout.HasValue ? retryTimeout.Value : 10);
if (string.IsNullOrWhiteSpace(managerCfg.BackPlateType))
{
if (!string.IsNullOrWhiteSpace(managerCfg.BackPlateName))
{
throw new InvalidOperationException("BackPlateType cannot be null if BackPlateName is specified.");
}
}
else
{
if (string.IsNullOrWhiteSpace(managerCfg.BackPlateName))
{
throw new InvalidOperationException("BackPlateName cannot be null if BackPlateType is specified.");
}
cfg.WithBackPlate(
Type.GetType(managerCfg.BackPlateType, true),
managerCfg.BackPlateName);
}
// build serializer if set
if (!string.IsNullOrWhiteSpace(managerCfg.SerializerType))
{
var serializerType = Type.GetType(managerCfg.SerializerType, false);
EnsureNotNull(serializerType, "Serializer type cannot be loaded, {0}", managerCfg.SerializerType);
cfg.WithSerializer(CacheReflectionHelper.CreateSerializer(serializerType));
}
foreach (CacheManagerHandle handleItem in managerCfg)
{
var normRefId = handleItem.RefHandleId.ToUpper(CultureInfo.InvariantCulture);
Ensure(
handleDefs.ContainsKey(normRefId),
"Referenced cache handle [{0}] cannot be found in cache handles definition.",
handleItem.RefHandleId);
var handleDef = handleDefs[normRefId];
var handle = new CacheHandleConfiguration(handleItem.Name)
{
HandleType = handleDef.HandleType,
ExpirationMode = handleDef.ExpirationMode,
ExpirationTimeout = handleDef.ExpirationTimeout,
EnableStatistics = managerCfg.EnableStatistics,
EnablePerformanceCounters = managerCfg.EnablePerformanceCounters,
IsBackPlateSource = handleItem.IsBackPlateSource
};
// override default timeout if it is defined in this section.
if (!string.IsNullOrWhiteSpace(handleItem.Timeout))
{
handle.ExpirationTimeout = GetTimeSpan(handleItem.Timeout, "timeout");
}
// override default expiration mode if it is defined in this section.
if (!string.IsNullOrWhiteSpace(handleItem.ExpirationMode))
{
try
{
handle.ExpirationMode = (ExpirationMode)Enum.Parse(typeof(ExpirationMode), handleItem.ExpirationMode);
}
catch (ArgumentException ex)
{
throw new InvalidOperationException("Invalid value '" + handleItem.ExpirationMode + "'for expiration mode", ex);
}
}
if (handle.ExpirationMode != ExpirationMode.None && handle.ExpirationTimeout == TimeSpan.Zero)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.InvariantCulture,
"Expiration mode set without a valid timeout specified for handle [{0}]",
handle.HandleName));
}
cfg.CacheHandleConfigurations.Add(handle);
}
Ensure(cfg.CacheHandleConfigurations.Count > 0, "There are no valid cache handles linked to the cache manager configuration [{0}]", configName);
return(cfg);
}
