/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* 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 org.apache.hadoop.hive.ql.util.jdbm.recman;
import java.io.IOException;
import java.util.Properties;
import org.apache.hadoop.hive.ql.util.jdbm.RecordManager;
import org.apache.hadoop.hive.ql.util.jdbm.RecordManagerOptions;
import org.apache.hadoop.hive.ql.util.jdbm.RecordManagerProvider;
import org.apache.hadoop.hive.ql.util.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( "Soft reference cache not implemented" );
} else if ( value.equalsIgnoreCase( RecordManagerOptions.WEAK_REF_CACHE ) ) {
throw new IllegalArgumentException( "Weak reference cache not implemented" );
} else {
throw new IllegalArgumentException( "Invalid cache type: " + value );
}
return recman;
}
}