public DataSet GetDataSet()
{
ConstDataSetPoolEntry poolEntry = null;
if (!globalPool.TryGetValue(DataSetXml, out poolEntry))
{
poolEntry = new ConstDataSetPoolEntry()
{
OriginalDataSet = LoadDataSetFromXml(),
Pool = new ConcurrentBag <ConstDataSet>()
};
globalPool[DataSetXml] = poolEntry;
}
if (ReadOnly)
{
ConstDataSet constDs = null;
if (!poolEntry.Pool.TryTake(out constDs))
{
constDs = (ConstDataSet)poolEntry.OriginalDataSet.Copy();
newInstanceCount++;
constDs.MakeReadOnlyColumns();
constDs.SubscribeOnChangeEvents();
}
localInstances.Add(constDs);
return(constDs);
}
else
{
// global pool is not used in this case
var ds = poolEntry.OriginalDataSet.Copy();
newInstanceCount++;
return(ds);
}
}
public void Dispose()
{
if (localInstances.Count > 0)
{
ConstDataSetPoolEntry poolEntry = null;
if (globalPool.TryGetValue(DataSetXml, out poolEntry))
{
foreach (var ds in localInstances)
{
if (!ds.IsDirty)
{
poolEntry.Pool.Add(ds);
}
}
localInstances.Clear();
}
}
}