/// <summary>
/// Returns content back
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T GetContent <T>()
{
return(DataTypesConvertor.ConvertBack <T>(this.content));
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T ExternalId <T>()
{
return(DataTypesConvertor.ConvertBack <T>(externalId));
}
/// <summary>
/// Gets resources of the same type as a batch from memory or database (if not yet loaded).
/// Value instance, when byte[], must stay immutable, please use Dbreeze.Utils.CloneArray
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="resourcesNames"></param>
/// <param name="resourceSettings">resource extra behaviour</param>
/// <returns></returns>
public IDictionary <string, TValue> Select <TValue>(IList <string> resourcesNames, Settings resourceSettings = null)
{
Dictionary <string, TValue> ret = new Dictionary <string, TValue>();
if (resourcesNames == null || resourcesNames.Count < 1)
{
return(ret);
}
if (resourceSettings == null)
{
resourceSettings = _defaultSetting;
}
byte[] val = null;
string rn = String.Empty;
//bool ba = typeof(TValue) == typeof(byte[]);
_sync.EnterUpgradeableReadLock();
try
{
foreach (var rsn in resourcesNames.OrderBy(r => r))
{
if (String.IsNullOrEmpty(rsn))
{
continue;
}
rn = _urp + rsn;
if (!_d.TryGetValue(rn, out val))
{
//Value is not found
_sync.EnterWriteLock();
try
{
//At this moment value appeared
if (_d.TryGetValue(rn, out val))
{
if (val != null)
{
ret[rsn] = DataTypesConvertor.ConvertBack <TValue>(val);
}
else
{
ret[rsn] = default(TValue);
}
continue;
}
//trying to get from database
byte[] btKey = DataTypesConvertor.ConvertKey <string>(rn);
var row = LTrie.GetKey(btKey, false, false);
if (row.Exists)
{
val = row.GetFullValue(false);
if (val == null)
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = null;
}
ret[rsn] = default(TValue);
}
else
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = val;
}
ret[rsn] = DataTypesConvertor.ConvertBack <TValue>(val);
}
}
else
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = null;
}
ret[rsn] = default(TValue);
}
}
catch (Exception ex)
{
throw DBreezeException.Throw(DBreezeException.eDBreezeExceptions.DBREEZE_RESOURCES_CONCERNING, "in Select 1", ex);
}
finally
{
_sync.ExitWriteLock();
}
}
else
{
if (val == null)
{
ret[rsn] = default(TValue);
}
else
{
ret[rsn] = DataTypesConvertor.ConvertBack <TValue>(val);
}
}
}//eo foreach
}
catch (System.Exception ex)
{
throw DBreezeException.Throw(DBreezeException.eDBreezeExceptions.DBREEZE_RESOURCES_CONCERNING, "in Select 2", ex);
}
finally
{
_sync.ExitUpgradeableReadLock();
}
return(ret);
}
/// <summary>
/// Gets resource from memory or database (if not yet loaded)
/// Value instance, when byte[], must stay immutable, please use Dbreeze.Utils.CloneArray
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="resourceName"></param>
/// <param name="resourceSettings">resource extra behaviour</param>
/// <returns></returns>
public TValue Select <TValue>(string resourceName, Settings resourceSettings = null)
{
if (String.IsNullOrEmpty(resourceName))
{
return(default(TValue));
}
if (resourceSettings == null)
{
resourceSettings = _defaultSetting;
}
byte[] val = null;
string rn = _urp + resourceName;
_sync.EnterUpgradeableReadLock();
try
{
if (!_d.TryGetValue(rn, out val))
{
//Value is not found
_sync.EnterWriteLock();
try
{
//At this moment value appeared
if (_d.TryGetValue(rn, out val))
{
return(val == null ? default(TValue) : DataTypesConvertor.ConvertBack <TValue>(val));
}
//trying to get from database
byte[] btKey = DataTypesConvertor.ConvertKey <string>(rn);
var row = LTrie.GetKey(btKey, false, false);
if (row.Exists)
{
val = row.GetFullValue(false);
if (val == null)
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = null;
}
return(default(TValue));
}
else
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = val;
}
return(DataTypesConvertor.ConvertBack <TValue>(val));
}
}
else
{
if (resourceSettings.HoldInMemory)
{
_d[rn] = null;
}
return(default(TValue));
}
}
catch (Exception ex)
{
throw DBreezeException.Throw(DBreezeException.eDBreezeExceptions.DBREEZE_RESOURCES_CONCERNING, "in Select 1", ex);
}
finally
{
_sync.ExitWriteLock();
}
}
else
{
return(val == null ? default(TValue) : DataTypesConvertor.ConvertBack <TValue>(val));
}
}
catch (System.Exception ex)
{
throw DBreezeException.Throw(DBreezeException.eDBreezeExceptions.DBREEZE_RESOURCES_CONCERNING, "in Select 2", ex);
}
finally
{
_sync.ExitUpgradeableReadLock();
}
}
/// <summary>
/// SelectStartsWith.
/// Value instance, when byte[], must stay immutable, please use Dbreeze.Utils.CloneArray
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="resourceNameStartsWith"></param>
/// <param name="resourceSettings"></param>
/// <returns></returns>
public IEnumerable <KeyValuePair <string, TValue> > SelectStartsWith <TValue>(string resourceNameStartsWith, Settings resourceSettings = null)
{
if (!String.IsNullOrEmpty(resourceNameStartsWith))
{
if (resourceSettings == null)
{
resourceSettings = _defaultSetting;
}
byte[] val = null;
string rn = String.Empty;
byte[] btKey = null;
_sync.EnterUpgradeableReadLock();
btKey = DataTypesConvertor.ConvertKey <string>(_urp + resourceNameStartsWith);
var q = LTrie.IterateForwardStartsWith(btKey, true, false);
if (!resourceSettings.SortingAscending)
{
q = LTrie.IterateBackwardStartsWith(btKey, true, false);
}
foreach (var el in q)
{
rn = el.Key.UTF8_GetString();
if (!_d.TryGetValue(rn, out val))
{
val = el.GetFullValue(false);
if (resourceSettings.HoldInMemory)
{
_sync.EnterWriteLock();
try
{
_d[rn] = val;
}
catch (Exception)
{ }
finally
{
_sync.ExitWriteLock();
}
}
}
//no try..catch for yield return
yield return(new KeyValuePair <string, TValue>(rn.Substring(1), val == null ? default(TValue) : DataTypesConvertor.ConvertBack <TValue>(val)));
}
_sync.ExitUpgradeableReadLock();
}//if is null or
}