/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.impl;
import java.util.Properties;
import org.hibernate.search.cfg.spi.IndexManagerFactory;
import org.hibernate.search.engine.service.spi.ServiceManager;
import org.hibernate.search.engine.service.spi.Startable;
import org.hibernate.search.indexes.impl.DirectoryBasedIndexManager;
import org.hibernate.search.indexes.impl.NRTIndexManager;
import org.hibernate.search.indexes.spi.IndexManager;
import org.hibernate.search.spi.BuildContext;
import org.hibernate.search.util.StringHelper;
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 {@code IndexManager} implementation for Hibernate Search.
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2012 Red Hat Inc.
* @author Hardy Ferentschik
*/
public class DefaultIndexManagerFactory implements IndexManagerFactory, Startable {
private static final Log log = LoggerFactory.make();
private ServiceManager serviceManager;
@Override
public IndexManager createDefaultIndexManager() {
return new DirectoryBasedIndexManager();
}
@Override
public IndexManager createIndexManagerByName(String indexManagerImplementationName) {
if ( StringHelper.isEmpty( indexManagerImplementationName ) ) {
return createDefaultIndexManager();
}
else {
indexManagerImplementationName = indexManagerImplementationName.trim();
IndexManager indexManager = fromAlias( indexManagerImplementationName );
if ( indexManager == null ) {
indexManagerImplementationName = aliasToFQN( indexManagerImplementationName );
Class<?> indexManagerClass = ClassLoaderHelper.classForName(
indexManagerImplementationName,
serviceManager
);
indexManager = ClassLoaderHelper.instanceFromClass(
IndexManager.class,
indexManagerClass,
"index manager"
);
}
log.indexManagerAliasResolved( indexManagerImplementationName, indexManager.getClass() );
return indexManager;
}
}
@Override
public void start(Properties properties, BuildContext context) {
this.serviceManager = context.getServiceManager();
}
/**
* Provide a way to expand known aliases to fully qualified class names.
* As opposed to {@link #fromAlias(String)} we can use this to expand to well
* known implementations which are optional on the classpath.
*
* @param alias the alias to replace with the fully qualified class name of the implementation
*
* @return the same name, or a fully qualified class name to use instead
*/
protected String aliasToFQN(final String alias) {
// TODO Add the Infinispan implementor here
return alias;
}
/**
* Extension point: allow to override aliases or add new ones to
* directly create class instances.
*
* @param alias the requested alias
*
* @return return the index manager for the given alias or {@code null} if the alias is unknown.
*/
protected IndexManager fromAlias(String alias) {
if ( "directory-based".equals( alias ) ) {
return new DirectoryBasedIndexManager();
}
if ( "near-real-time".equals( alias ) ) {
return new NRTIndexManager();
}
return null;
}
}