com.mchange.v2.c3p0.stmt.GlobalMaxOnlyStatementCache Maven / Gradle / Ivy
The newest version!
/*
* Distributed as part of c3p0 v.0.9.1.1
*
* Copyright (C) 2005 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1, as
* published by the Free Software Foundation.
*
* This software 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software; see the file LICENSE. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.mchange.v2.c3p0.stmt;
import java.sql.*;
import com.mchange.v2.async.AsynchronousRunner;
public final class GlobalMaxOnlyStatementCache extends GooGooStatementCache
{
//MT: protected by this' lock
int max_statements;
Deathmarch globalDeathmarch = new Deathmarch();
public GlobalMaxOnlyStatementCache(AsynchronousRunner blockingTaskAsyncRunner, int max_statements)
{
super( blockingTaskAsyncRunner );
this.max_statements = max_statements;
}
//called only in parent's constructor
protected ConnectionStatementManager createConnectionStatementManager()
{ return new SimpleConnectionStatementManager(); }
//called by parent only with this' lock
void addStatementToDeathmarches( Object pstmt, Connection physicalConnection )
{ globalDeathmarch.deathmarchStatement( pstmt ); }
void removeStatementFromDeathmarches( Object pstmt, Connection physicalConnection )
{ globalDeathmarch.undeathmarchStatement( pstmt ); }
boolean prepareAssimilateNewStatement(Connection pcon)
{
int global_size = this.countCachedStatements();
return ( global_size < max_statements || (global_size == max_statements && globalDeathmarch.cullNext()) );
}
}