//public void AtomicIncrement<T, TKey>(IDbQueryable<T> source, Expression<Func<T, TKey>> keySelector, int value, T item) where T : new()
//{
// if (item == null)
// {
// throw new LinqDbException("Linqdb: new_item_if_doesnt_exist can't be null");
// }
// var table_info = CheckTableInfo<T>();
// ulong where_hash = GetWhereHash(typeof(T).Name, source.LDBTree);
// bool done = false;
// string error = null;
// var ilock = ModifyBatch.GetTableIncrementBatchLock(typeof(T).Name);
// lock (ilock)
// {
// if (!ModifyBatch._increment_batch.ContainsKey(where_hash))
// {
// ModifyBatch._increment_batch[where_hash] = new IncrementData()
// {
// Callbacks = new List<Action<string>>(),
// NewObject = item,
// Value = 0,
// ValueIfNew = 0
// };
// }
// else
// {
// ModifyBatch._increment_batch[where_hash].ValueIfNew += value;
// }
// ModifyBatch._increment_batch[where_hash].Value += value;
// ModifyBatch._increment_batch[where_hash].Callbacks.Add(f =>
// {
// done = true;
// error = f;
// });
// }
// var _write_lock = GetTableWriteLock(typeof(T).Name);
// bool lockAcquired = false;
// int maxWaitMs = 60000;
// IncrementData _increment_data = null;
// try
// {
// DateTime start = DateTime.Now;
// while (!done)
// {
// lockAcquired = Monitor.TryEnter(_write_lock, 0);
// if (lockAcquired)
// {
// if (done)
// {
// Monitor.Exit(_write_lock);
// lockAcquired = false;
// break;
// }
// else
// {
// break;
// }
// }
// Thread.Sleep(250);
// //if ((DateTime.Now - start).TotalMilliseconds > maxWaitMs)
// //{
// // throw new LinqDbException("Linqdb: AtomicIncrement waited too long to acquire write lock. Is the load too high?");
// //}
// }
// if (done)
// {
// if (!string.IsNullOrEmpty(error))
// {
// throw new LinqDbException(error);
// }
// else
// {
// return;
// }
// }
// //not done, but have write lock for the table
// lock (ilock)
// {
// _increment_data = ModifyBatch._increment_batch[where_hash];
// var oval = new IncrementData();
// ModifyBatch._increment_batch.TryRemove(where_hash, out oval);
// }
// var par = keySelector.Parameters.First();
// var name = SharedUtils.GetPropertyName(keySelector.Body.ToString());
// int total = 0;
// var res = this.SelectEntity<T>(source.LDBTree, out total);
// if (res != null && res.Count() > 1)
// {
// throw new LinqDbException("Linqdb: more than one item identified");
// }
// if (res == null || !res.Any())
// {
// var initial = (int)_increment_data.NewObject.GetType().GetProperty(name).GetValue(_increment_data.NewObject, null);
// _increment_data.NewObject.GetType().GetProperty(name).SetValue(_increment_data.NewObject, initial + _increment_data.ValueIfNew);
// this.SaveIncrement<T>((T)_increment_data.NewObject, null);
// }
// else
// {
// if (name == "Id")
// {
// throw new LinqDbException("Linqdb: can't modify Id property");
// }
// object ov = typeof(T).GetProperty(name).GetValue(res[0], null);
// if (ov == null || !(ov is int))
// {
// throw new LinqDbException("Linqdb: property to increment must be of type int");
// }
// int old_val = (int)ov;
// int id = (int)typeof(T).GetProperty("Id").GetValue(res[0], null);
// var dic = new Dictionary<int, int?>() { { id, old_val + _increment_data.Value } };
// UpdateIncrement(keySelector, dic, null);
// }
// foreach (var cb in _increment_data.Callbacks)
// {
// cb(null);
// }
// }
// catch (Exception ex)
// {
// if (_increment_data != null)
// {
// var additionalInfo = ex.Message;
// if (_increment_data.Callbacks.Count() > 1)
// {
// additionalInfo += " This error could belong to another entity which happened to be in the same batch.";
// }
// foreach (var cb in _increment_data.Callbacks)
// {
// cb(additionalInfo);
// }
// }
// throw;
// }
// finally
// {
// if (lockAcquired)
// {
// Monitor.Exit(_write_lock);
// }
// }
//}
public void AtomicIncremen2Props <T, TKey1, TKey2>(IDbQueryable <T> source, Expression <Func <T, TKey1> > keySelector1, Expression <Func <T, TKey2> > keySelector2, int value1, int value2, T item) where T : new()
{
if (item == null)
{
throw new LinqDbException("Linqdb: new_item_if_doesnt_exist can't be null");
}
var table_info = CheckTableInfo <T>();
var _write_lock = GetTableWriteLock(typeof(T).Name);
lock (_write_lock)
{
var statistics = new LinqdbSelectStatisticsInternal();
var res = this.SelectEntity <T>(source.LDBTree, statistics);
if (res != null && res.Count() > 1)
{
throw new LinqDbException("Linqdb: more than one item identified");
}
if (res == null || !res.Any())
{
this.SaveIncrement <T>(item, null);
}
else
{
//prop1
var par1 = keySelector1.Parameters.First();
var name1 = SharedUtils.GetPropertyName(keySelector1.Body.ToString());
if (name1 == "Id")
{
throw new LinqDbException("Linqdb: can't modify Id property");
}
object ov = typeof(T).GetProperty(name1).GetValue(res[0], null);
if (ov == null || !(ov is int))
{
throw new LinqDbException("Linqdb: property to increment must be of type int");
}
int old_val = (int)ov;
int id = (int)typeof(T).GetProperty("Id").GetValue(res[0], null);
var dic = new Dictionary <int, int?>()
{
{ id, old_val + value1 }
};
UpdateIncrement(keySelector1, dic, null);
//prop2
var par2 = keySelector2.Parameters.First();
var name2 = SharedUtils.GetPropertyName(keySelector2.Body.ToString());
if (name2 == "Id")
{
throw new LinqDbException("Linqdb: can't modify Id property");
}
ov = typeof(T).GetProperty(name2).GetValue(res[0], null);
if (ov == null || !(ov is int))
{
throw new LinqDbException("Linqdb: property to increment must be of type int");
}
old_val = (int)ov;
dic = new Dictionary <int, int?>()
{
{ id, old_val + value2 }
};
UpdateIncrement(keySelector2, dic, null);
}
}
}
public static IDbQueryable <T> Or <T>(this IDbQueryable <T> source)
{
source.LDBTree.Prev.OrWith = source.LDBTree.Prev.Id + 1;
return(source);
}
