public override void SchemaCompleted()
{
List <IColumn> columns = new List <IColumn> {
table.PrimaryKey
};
ParameterExpression reader = Expression.Parameter(typeof(FieldReader));
var expression = ToStringExpressionVisitor.GetToString(table, reader, columns);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT {0}\r\nFROM {1} {2}\r\n".FormatWith(
columns.ToString(c => currentAlias + "." + c.Name.SqlEscape(), ", "),
table.Name.ToString(),
currentAlias.ToString());
select += this.lastPartialJoin + currentAlias + "." + table.PrimaryKey.Name.SqlEscape() + "\r\n" + this.remainingJoins;
query = new SqlPreCommandSimple(select);
}
//Reader
{
var kvpConstructor = Expression.New(CachedTableConstructor.ciKVPIntString,
CachedTableConstructor.NewPrimaryKey(FieldReader.GetExpression(reader, 0, this.table.PrimaryKey.Type)),
expression);
rowReader = Expression.Lambda <Func <FieldReader, KeyValuePair <PrimaryKey, string> > >(kvpConstructor, reader).Compile();
}
toStrings = new ResetLazy <Dictionary <PrimaryKey, string> >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, string> result = new Dictionary <PrimaryKey, string>();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
var kvp = rowReader(fr);
result[kvp.Key] = kvp.Value;
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
if (this.subTables != null)
{
foreach (var item in this.subTables)
{
item.SchemaCompleted();
}
}
}
public CachedTable(ICacheLogicController controller, AliasGenerator aliasGenerator, string lastPartialJoin, string remainingJoins)
: base(controller)
{
this.table = Schema.Current.Table(typeof(T));
CachedTableConstructor ctr = this.Constructor = new CachedTableConstructor(this, aliasGenerator);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT\r\n{0}\r\nFROM {1} {2}\r\n".FormatWith(
Table.Columns.Values.ToString(c => ctr.currentAlias + "." + c.Name.SqlEscape(), ",\r\n"),
table.Name.ToString(),
ctr.currentAlias.ToString());
ctr.remainingJoins = lastPartialJoin == null ? null : lastPartialJoin + ctr.currentAlias + ".Id\r\n" + remainingJoins;
if (ctr.remainingJoins != null)
{
select += ctr.remainingJoins;
}
query = new SqlPreCommandSimple(select);
}
//Reader
{
rowReader = ctr.GetRowReader();
}
//Completer
{
ParameterExpression me = Expression.Parameter(typeof(T), "me");
var block = ctr.MaterializeEntity(me, table);
completerExpression = Expression.Lambda <Action <object, IRetriever, T> >(block, CachedTableConstructor.originObject, CachedTableConstructor.retriever, me);
completer = completerExpression.Compile();
idGetter = ctr.GetPrimaryKeyGetter((IColumn)table.PrimaryKey);
}
rows = new ResetLazy <Dictionary <PrimaryKey, object> >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
Table table = connector.Schema.Table(typeof(T));
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, object> result = new Dictionary <PrimaryKey, object>();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
object obj = rowReader(fr);
result[idGetter(obj)] = obj; //Could be repeated joins
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
if (!CacheLogic.WithSqlDependency && lastPartialJoin.HasText()) //Is semi
{
semiCachedController = new SemiCachedController <T>(this);
}
}
public CachedTableMList(ICacheLogicController controller, TableMList table, AliasGenerator aliasGenerator, string lastPartialJoin, string remainingJoins)
: base(controller)
{
this.table = table;
CachedTableConstructor ctr = this.Constructor = new CachedTableConstructor(this, aliasGenerator);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT\r\n{0}\r\nFROM {1} {2}\r\n".FormatWith(
ctr.table.Columns.Values.ToString(c => ctr.currentAlias + "." + c.Name.SqlEscape(), ",\r\n"),
table.Name.ToString(),
ctr.currentAlias.ToString());
ctr.remainingJoins = lastPartialJoin + ctr.currentAlias + "." + table.BackReference.Name.SqlEscape() + "\r\n" + remainingJoins;
query = new SqlPreCommandSimple(select);
}
//Reader
{
rowReader = ctr.GetRowReader();
}
//Completer
{
List <Expression> instructions = new List <Expression>
{
Expression.Assign(ctr.origin, Expression.Convert(CachedTableConstructor.originObject, ctr.tupleType)),
Expression.Assign(result, ctr.MaterializeField(table.Field))
};
var ci = typeof(MList <T> .RowIdElement).GetConstructor(new [] { typeof(T), typeof(PrimaryKey), typeof(int?) });
var order = table.Order == null?Expression.Constant(null, typeof(int?)) :
ctr.GetTupleProperty(table.Order).Nullify();
instructions.Add(Expression.New(ci, result, CachedTableConstructor.NewPrimaryKey(ctr.GetTupleProperty(table.PrimaryKey)), order));
var block = Expression.Block(typeof(MList <T> .RowIdElement), new[] { ctr.origin, result }, instructions);
activatorExpression = Expression.Lambda <Func <object, IRetriever, MList <T> .RowIdElement> >(block, CachedTableConstructor.originObject, CachedTableConstructor.retriever);
activator = activatorExpression.Compile();
parentIdGetter = ctr.GetPrimaryKeyGetter(table.BackReference);
rowIdGetter = ctr.GetPrimaryKeyGetter(table.PrimaryKey);
}
relationalRows = new ResetLazy <Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> > >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> > result = new Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> >();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
object obj = rowReader(fr);
PrimaryKey parentId = parentIdGetter(obj);
var dic = result.TryGetC(parentId);
if (dic == null)
{
result[parentId] = dic = new Dictionary <PrimaryKey, object>();
}
dic[rowIdGetter(obj)] = obj;
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
}
public static List <T> ToListWithInvalidation <T>(this IQueryable <T> simpleQuery, Type type, string exceptionContext, Action <SqlNotificationEventArgs> invalidation)
{
if (!WithSqlDependency)
{
throw new InvalidOperationException("ToListWithInvalidation requires SqlDependency");
}
ITranslateResult tr;
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
tr = ((DbQueryProvider)simpleQuery.Provider).GetRawTranslateResult(simpleQuery.Expression);
OnChangeEventHandler onChange = (object sender, SqlNotificationEventArgs args) =>
{
try
{
if (args.Type != SqlNotificationType.Change)
{
throw new InvalidOperationException(
"Problems with SqlDependency (Type : {0} Source : {1} Info : {2}) on query: \r\n{3}"
.FormatWith(args.Type, args.Source, args.Info, tr.MainCommand.PlainSql()));
}
if (args.Info == SqlNotificationInfo.PreviousFire)
{
throw new InvalidOperationException("The same transaction that loaded the data is invalidating it!")
{
Data = { { "query", tr.MainCommand.PlainSql() } }
}
}
;
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Change ToListWithInvalidations {0} {1}".FormatWith(typeof(T).TypeName()), exceptionContext);
}
invalidation(args);
}
catch (Exception e)
{
e.LogException(c => c.ControllerName = exceptionContext);
}
};
SimpleReader reader = null;
Expression <Func <IProjectionRow, T> > projectorExpression = (Expression <Func <IProjectionRow, T> >)tr.GetMainProjector();
Func <IProjectionRow, T> projector = projectorExpression.Compile();
List <T> list = new List <T>();
CacheLogic.AssertSqlDependencyStarted();
Table table = Schema.Current.Table(type);
DatabaseName db = table.Name.Schema?.Database;
SqlConnector subConnector = ((SqlConnector)Connector.Current).ForDatabase(db);
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load ToListWithInvalidations {0} {1}".FormatWith(typeof(T).TypeName()), exceptionContext);
}
using (new EntityCache())
using (var r = EntityCache.NewRetriever()) {
subConnector.ExecuteDataReaderDependency(tr.MainCommand, onChange, StartSqlDependencyAndEnableBrocker, fr =>
{
if (reader == null)
{
reader = new SimpleReader(fr, r);
}
list.Add(projector(reader));
}, CommandType.Text);
r.CompleteAll();
}
return(list);
}