Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A class that gets Accession Number, check for uniqueness

 *             and register it into db

 *  Copyright: 2000 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Jivka Bojilova, Matt Jones

 *

 *   '$Author$'

 *     '$Date$'

 * '$Revision$'

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.index;

import java.io.File;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.solr.client.solrj.SolrServer;

import org.apache.solr.client.solrj.embedded.EmbeddedSolrServer;

import org.apache.solr.client.solrj.impl.CommonsHttpSolrServer;

import org.apache.solr.core.CoreContainer;

import org.dataone.configuration.Settings;

/**

 * A factory for creating SolrServer implementations based on

 * configuration in Settings.java

 * Options are as follows.

 * 

 * Embedded (default):

 * solr.server.classname=org.apache.solr.client.solrj.embedded.EmbeddedSolrServer

 * solr.homeDir=/path/to/solr/home

 * 

 * HTTP:

 * solr.server.classname=org.apache.solr.client.solrj.impl.CommonsHttpSolrServer

 * solr.endpoint=http://endpoint/to/solr/service

 * 

 * @author leinfelder + tao

 *

 */

public class SolrServerFactory {

    public static final String SOLR_HOME_PROPERTY_NAME = "solr.homeDir";

    public static final String SOLR_CONFIG_FILE_NAME_PROPERTY_NAME = "solr.configFileName";

    public static final String SOLR_COLLECTION_NAME_PROPERTY_NAME = "solr.collectionName";

    public static final String SOLR_SERVER_CLASSNAME_PROPERTY_NAME = "solr.server.classname";

    public static final String SOLR_ENPOINT_PROPERTY_NAME = "solr.endpoint";

    private static final String EMBEDDEDSERVERCLASS = "org.apache.solr.client.solrj.embedded.EmbeddedSolrServer";

    private static final String HTTPSERVERCLASS = "org.apache.solr.client.solrj.impl.CommonsHttpSolrServer";

	public static Log log = LogFactory.getLog(SolrServerFactory.class);

	private static CoreContainer coreContainer = null;

	private static SolrServer solrServer = null;

	public static SolrServer createSolrServer() throws Exception {

		String className = Settings.getConfiguration().getString(SOLR_SERVER_CLASSNAME_PROPERTY_NAME);

		if (className != null && className.equals(EMBEDDEDSERVERCLASS)) {

		    generateEmbeddedServer();

		} else if (className != null && className.equals(HTTPSERVERCLASS)) {

		    String solrServerUrl = Settings.getConfiguration().getString(SOLR_ENPOINT_PROPERTY_NAME);

		    solrServer = new CommonsHttpSolrServer(solrServerUrl);

		} else {

		    throw new Exception("SolrServerFactory.createSolrServer - MetacatIndex doesn't support this solr server type: "+className);

		}

        return solrServer;

	}

	private static void generateEmbeddedServer() throws Exception {

	    String solrHomeDir = Settings.getConfiguration().getString(SOLR_HOME_PROPERTY_NAME);

        log.info("The configured solr home from properties is " + solrHomeDir);

        String configFileName = Settings.getConfiguration().getString(SOLR_CONFIG_FILE_NAME_PROPERTY_NAME);

        File configFile = new File(solrHomeDir, configFileName);

        coreContainer = new CoreContainer(solrHomeDir, configFile);

        coreContainer.load(solrHomeDir, configFile);

        String collectioname = Settings.getConfiguration().getString(SOLR_COLLECTION_NAME_PROPERTY_NAME);

        solrServer = new EmbeddedSolrServer(coreContainer, collectioname);

	}

	public static CoreContainer getCoreContainer() {

	    return coreContainer;

	}

}