/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.common.buffer;
import org.teiid.common.buffer.BufferManager;
import org.teiid.common.buffer.impl.BufferManagerImpl;
import org.teiid.common.buffer.impl.MemoryStorageManager;
import org.teiid.core.TeiidComponentException;
/**
* <p>Factory for BufferManager instances. One method will get
* a server buffer manager, as it should be instantiated in a running
* MetaMatrix server. That BufferManager is configured mostly by the
* passed in properties.</p>
*
* <p>The other method returns a stand-alone, in-memory buffer manager. This
* is typically used for either in-memory testing or any time the
* query processor component is not expected to run out of memory, such as
* within the modeler.</p>
*/
public class BufferManagerFactory {
private static BufferManager INSTANCE;
/**
* Helper to get a buffer manager all set up for unmanaged standalone use. This is
* typically used for testing or when memory is not an issue.
* @return BufferManager ready for use
*/
public static BufferManager getStandaloneBufferManager() {
if (INSTANCE == null) {
BufferManagerImpl bufferMgr = createBufferManager();
INSTANCE = bufferMgr;
}
return INSTANCE;
}
public static BufferManagerImpl createBufferManager() {
BufferManagerImpl bufferMgr = new BufferManagerImpl();
try {
bufferMgr.initialize();
} catch (TeiidComponentException e) {
throw new RuntimeException(e);
}
// Add unmanaged memory storage manager
bufferMgr.setStorageManager(new MemoryStorageManager());
return bufferMgr;
}
}