001 /**
002 * JDBM LICENSE v1.00
003 *
004 * Redistribution and use of this software and associated documentation
005 * ("Software"), with or without modification, are permitted provided
006 * that the following conditions are met:
007 *
008 * 1. Redistributions of source code must retain copyright
009 * statements and notices. Redistributions must also contain a
010 * copy of this document.
011 *
012 * 2. Redistributions in binary form must reproduce the
013 * above copyright notice, this list of conditions and the
014 * following disclaimer in the documentation and/or other
015 * materials provided with the distribution.
016 *
017 * 3. The name "JDBM" must not be used to endorse or promote
018 * products derived from this Software without prior written
019 * permission of Cees de Groot. For written permission,
020 * please contact cg@cdegroot.com.
021 *
022 * 4. Products derived from this Software may not be called "JDBM"
023 * nor may "JDBM" appear in their names without prior written
024 * permission of Cees de Groot.
025 *
026 * 5. Due credit should be given to the JDBM Project
027 * (http://jdbm.sourceforge.net/).
028 *
029 * THIS SOFTWARE IS PROVIDED BY THE JDBM PROJECT AND CONTRIBUTORS
030 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
031 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
032 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
033 * CEES DE GROOT OR ANY CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
034 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
035 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
036 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
037 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
038 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
039 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
040 * OF THE POSSIBILITY OF SUCH DAMAGE.
041 *
042 * Copyright 2000 (C) Cees de Groot. All Rights Reserved.
043 * Copyright 2000-2001 (C) Alex Boisvert. All Rights Reserved.
044 * Contributions are Copyright (C) 2000 by their associated contributors.
045 *
046 * $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
047 */
048
049 package jdbm.recman;
050
051 import java.io.IOException;
052 import java.util.Properties;
053
054 import jdbm.RecordManager;
055 import jdbm.RecordManagerOptions;
056 import jdbm.RecordManagerProvider;
057
058 import jdbm.helper.MRU;
059
060 /**
061 * Provider of the default RecordManager implementation.
062 *
063 * @author <a href="mailto:boisvert@intalio.com">Alex Boisvert</a>
064 * @version $Id: Provider.java,v 1.3 2005/06/25 23:12:32 doomdark Exp $
065 */
066 public final class Provider
067 implements RecordManagerProvider
068 {
069
070 /**
071 * Create a default implementation record manager.
072 *
073 * @param name Name of the record file.
074 * @param options Record manager options.
075 * @throws IOException if an I/O related exception occurs while creating
076 * or opening the record manager.
077 * @throws UnsupportedOperationException if some options are not supported by the
078 * implementation.
079 * @throws IllegalArgumentException if some options are invalid.
080 */
081 public RecordManager createRecordManager( String name,
082 Properties options )
083 throws IOException
084 {
085 RecordManager recman;
086 String value;
087 int cacheSize;
088
089 recman = new BaseRecordManager( name );
090
091 value = options.getProperty( RecordManagerOptions.DISABLE_TRANSACTIONS, "false" );
092 if ( value.equalsIgnoreCase( "TRUE" ) ) {
093 ( (BaseRecordManager) recman ).disableTransactions();
094 }
095
096 value = options.getProperty( RecordManagerOptions.CACHE_SIZE, "1000" );
097 cacheSize = Integer.parseInt( value );
098
099 value = options.getProperty( RecordManagerOptions.CACHE_TYPE,
100 RecordManagerOptions.NORMAL_CACHE );
101 if ( value.equalsIgnoreCase( RecordManagerOptions.NORMAL_CACHE ) ) {
102 MRU cache = new MRU( cacheSize );
103 recman = new CacheRecordManager( recman, cache );
104 } else if ( value.equalsIgnoreCase( RecordManagerOptions.SOFT_REF_CACHE ) ) {
105 throw new IllegalArgumentException( "Soft reference cache not implemented" );
106 } else if ( value.equalsIgnoreCase( RecordManagerOptions.WEAK_REF_CACHE ) ) {
107 throw new IllegalArgumentException( "Weak reference cache not implemented" );
108 } else {
109 throw new IllegalArgumentException( "Invalid cache type: " + value );
110 }
111
112 return recman;
113 }
114
115
116 }