Package jdbm.recman

Source Code of jdbm.recman.Provider

/**
* JDBM LICENSE v1.00
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
*    statements and notices.  Redistributions must also contain a
*    copy of this document.
*
* 2. Redistributions in binary form must reproduce the
*    above copyright notice, this list of conditions and the
*    following disclaimer in the documentation and/or other
*    materials provided with the distribution.
*
* 3. The name "JDBM" must not be used to endorse or promote
*    products derived from this Software without prior written
*    permission of Cees de Groot.  For written permission,
*    please contact cg@cdegroot.com.
*
* 4. Products derived from this Software may not be called "JDBM"
*    nor may "JDBM" appear in their names without prior written
*    permission of Cees de Groot.
*
* 5. Due credit should be given to the JDBM Project
*    (http://jdbm.sourceforge.net/).
*
* THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
* CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2000 (C) Cees de Groot. All Rights Reserved.
* Copyright 2000-2001 (C) Alex Boisvert. All Rights Reserved.
* Contributions are Copyright (C) 2000 by their associated contributors.
*
* $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
*/

package jdbm.recman;

import java.io.IOException;
import java.util.Properties;

import org.apache.directory.server.i18n.I18n;

import jdbm.RecordManager;
import jdbm.RecordManagerOptions;
import jdbm.RecordManagerProvider;

import jdbm.helper.MRU;

/**
* Provider of the default RecordManager implementation.
*
* @author <a href="mailto:boisvert@intalio.com">Alex Boisvert</a>
* @version $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
*/
public final class Provider implements RecordManagerProvider
{
    /**
     * Create a default implementation record manager.
     *
     * @param name Name of the record file.
     * @param options Record manager options.
     * @throws IOException if an I/O related exception occurs while creating
     *                    or opening the record manager.
     * @throws UnsupportedOperationException if some options are not supported by the
     *                                      implementation.
     * @throws IllegalArgumentException if some options are invalid.
     */
    public RecordManager createRecordManager( String name, Properties options ) throws IOException
    {
        RecordManager  recman;
        String         value;
        int            cacheSize;

        recman = new BaseRecordManager( name );

        value = options.getProperty( RecordManagerOptions.DISABLE_TRANSACTIONS, "false" );
       
        if ( value.equalsIgnoreCase( "TRUE" ) )
        {
            ( ( BaseRecordManager ) recman ).disableTransactions();
        }

        value = options.getProperty( RecordManagerOptions.CACHE_SIZE, "1000" );
        cacheSize = Integer.parseInt( value );

        value = options.getProperty( RecordManagerOptions.CACHE_TYPE, RecordManagerOptions.NORMAL_CACHE );
       
        if ( value.equalsIgnoreCase( RecordManagerOptions.NORMAL_CACHE ) )
        {
            MRU cache = new MRU( cacheSize );
            recman = new CacheRecordManager( recman, cache );
        }
        else if ( value.equalsIgnoreCase( RecordManagerOptions.SOFT_REF_CACHE ) )
        {
            throw new IllegalArgumentException( I18n.err( I18n.ERR_551 ) );
        }
        else if ( value.equalsIgnoreCase( RecordManagerOptions.WEAK_REF_CACHE ) )
        {
            throw new IllegalArgumentException( I18n.err( I18n.ERR_552 ) );
        }
        else
        {
            throw new IllegalArgumentException( I18n.err( I18n.ERR_553, value ) );
        }

        return recman;
    }
}
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