/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2012 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.search.impl;
import org.hibernate.search.util.StringHelper;
import org.hibernate.search.cfg.spi.IndexManagerFactory;
import org.hibernate.search.indexes.impl.DirectoryBasedIndexManager;
import org.hibernate.search.indexes.impl.IndexManagerHolder;
import org.hibernate.search.indexes.impl.NRTIndexManager;
import org.hibernate.search.indexes.spi.IndexManager;
import org.hibernate.search.util.impl.ClassLoaderHelper;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* This is the default IndexManager implementation for Hibernate Search.
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2012 Red Hat Inc.
*/
public class DefaultIndexManagerFactory implements IndexManagerFactory {
private static final Log log = LoggerFactory.make();
@Override
public IndexManager createDefaultIndexManager() {
return new DirectoryBasedIndexManager();
}
@Override
public IndexManager createIndexManagerByName(String indexManagerImplementationName) {
if ( StringHelper.isEmpty( indexManagerImplementationName ) ) {
return createDefaultIndexManager();
}
else {
String implName = indexManagerImplementationName.trim();
IndexManager im = fromAlias( implName );
if ( im == null ) {
implName = aliasToFQN( implName );
im = ClassLoaderHelper.instanceFromName( IndexManager.class, implName,
IndexManagerHolder.class, "index manager" );
}
log.indexManagerAliasResolved( indexManagerImplementationName, im.getClass() );
return im;
}
}
/**
* Provide a way to expand known aliases to fully qualified class names.
* As opposed to {@link #fromAlias(String)} we can use this to expend to well
* known implementations which are optional on the classpath.
*
* @param implName
* @return the same name, or a fully qualified class name to use instead
*/
protected String aliasToFQN(final String implName) {
// TODO Add the Infinispan implementor here
return implName;
}
/**
* Extension point: allow to override aliases or add new ones to
* directly create class instances.
*
* @param implName the requested alias
* @return <code>null</code> if the alias is unknown.
*/
protected IndexManager fromAlias(String implName) {
if ( "directory-based".equals( implName ) ) {
return new DirectoryBasedIndexManager();
}
if ( "near-real-time".equals( implName ) ) {
return new NRTIndexManager();
}
return null;
}
}