You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
4.7 KiB
137 lines
4.7 KiB
// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License version 2 as published by
|
|
// the Free Software Foundation
|
|
//
|
|
// There are special exceptions to the terms and conditions of the GPL
|
|
// as it is applied to this software. View the full text of the
|
|
// exception in file EXCEPTIONS in the directory of this software
|
|
// distribution.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Data;
|
|
using System.Collections.Generic;
|
|
using MySql.Data.MySqlClient.Properties;
|
|
using System.Diagnostics;
|
|
|
|
namespace MySql.Data.MySqlClient
|
|
{
|
|
internal class ProcedureCache
|
|
{
|
|
private Hashtable procHash;
|
|
private Queue<int> hashQueue;
|
|
private int maxSize;
|
|
|
|
public ProcedureCache(int size)
|
|
{
|
|
maxSize = size;
|
|
hashQueue = new Queue<int>(maxSize);
|
|
procHash = new Hashtable(maxSize);
|
|
}
|
|
|
|
public DataSet GetProcedure(MySqlConnection conn, string spName)
|
|
{
|
|
int hash = spName.GetHashCode();
|
|
|
|
DataSet ds = null;
|
|
lock (procHash.SyncRoot)
|
|
{
|
|
ds = (DataSet)procHash[hash];
|
|
}
|
|
if (ds == null)
|
|
{
|
|
ds = AddNew(conn, spName);
|
|
#if !CF
|
|
conn.PerfMonitor.AddHardProcedureQuery();
|
|
#endif
|
|
MySqlTrace.LogInformation(conn.ServerThread,
|
|
String.Format(Resources.HardProcQuery, spName));
|
|
}
|
|
else
|
|
{
|
|
#if !CF
|
|
conn.PerfMonitor.AddSoftProcedureQuery();
|
|
#endif
|
|
MySqlTrace.LogInformation(conn.ServerThread,
|
|
String.Format(Resources.SoftProcQuery, spName));
|
|
}
|
|
return ds;
|
|
}
|
|
|
|
private DataSet AddNew(MySqlConnection connection, string spName)
|
|
{
|
|
DataSet procData = GetProcData(connection, spName);
|
|
if (maxSize > 0)
|
|
{
|
|
int hash = spName.GetHashCode();
|
|
lock (procHash.SyncRoot)
|
|
{
|
|
if (procHash.Keys.Count >= maxSize)
|
|
TrimHash();
|
|
if (!procHash.ContainsKey(hash))
|
|
{
|
|
procHash[hash] = procData;
|
|
hashQueue.Enqueue(hash);
|
|
}
|
|
}
|
|
}
|
|
return procData;
|
|
}
|
|
|
|
private void TrimHash()
|
|
{
|
|
int oldestHash = hashQueue.Dequeue();
|
|
procHash.Remove(oldestHash);
|
|
}
|
|
|
|
private static DataSet GetProcData(MySqlConnection connection, string spName)
|
|
{
|
|
string schema = String.Empty;
|
|
string name = spName;
|
|
|
|
int dotIndex = spName.IndexOf(".");
|
|
if (dotIndex != -1)
|
|
{
|
|
schema = spName.Substring(0, dotIndex);
|
|
name = spName.Substring(dotIndex + 1, spName.Length - dotIndex - 1);
|
|
}
|
|
|
|
string[] restrictions = new string[4];
|
|
restrictions[1] = schema.Length > 0 ? schema : connection.CurrentDatabase();
|
|
restrictions[2] = name;
|
|
DataTable procTable = connection.GetSchema("procedures", restrictions);
|
|
if (procTable.Rows.Count > 1)
|
|
throw new MySqlException(Resources.ProcAndFuncSameName);
|
|
if (procTable.Rows.Count == 0)
|
|
throw new MySqlException(String.Format(Resources.InvalidProcName, name, schema));
|
|
|
|
DataSet ds = new DataSet();
|
|
ds.Tables.Add(procTable);
|
|
|
|
// we don't use GetSchema here because that would cause another
|
|
// query of procedures and we don't need that since we already
|
|
// know the procedure we care about.
|
|
ISSchemaProvider isp = new ISSchemaProvider(connection);
|
|
string[] rest = isp.CleanRestrictions(restrictions);
|
|
try
|
|
{
|
|
DataTable parametersTable = isp.GetProcedureParameters(rest, procTable);
|
|
ds.Tables.Add(parametersTable);
|
|
}
|
|
catch (Exception) { }
|
|
|
|
return ds;
|
|
}
|
|
}
|
|
} |