/*
 * eGov suite of products aim to improve the internal efficiency,transparency,
 *    accountability and the service delivery of the government  organizations.
 *
 *     Copyright (C) <2015>  eGovernments Foundation
 *
 *     The updated version of eGov suite of products as by eGovernments Foundation
 *     is available at http://www.egovernments.org
 *
 *     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 3 of the License, or
 *     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, see http://www.gnu.org/licenses/ or
 *     http://www.gnu.org/licenses/gpl.html .
 *
 *     In addition to the terms of the GPL license to be adhered to in using this
 *     program, the following additional terms are to be complied with:
 *
 *         1) All versions of this program, verbatim or modified must carry this
 *            Legal Notice.
 *
 *         2) Any misrepresentation of the origin of the material is prohibited. It
 *            is required that all modified versions of this material be marked in
 *            reasonable ways as different from the original version.
 *
 *         3) This license does not grant any rights to any user of the program
 *            with regards to rights under trademark law for use of the trade names
 *            or trademarks of eGovernments Foundation.
 *
 *   In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org.
 */

package org.egov.infra.config.persistence.multitenancy;

import org.egov.infra.exception.ApplicationRuntimeException;
import org.hibernate.service.spi.Stoppable;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class TenantDatasourceProvider implements Stoppable {

	private Map<String, DataSource> tenantDatasourceStore = new ConcurrentHashMap<String, DataSource>();
	private static String ANY_DS_JNDI_NAME = "ezgovDatabasePool";

	protected DataSource getAnyDataSource() {
		return getTenantDataSource(ANY_DS_JNDI_NAME);
	}

	protected DataSource getTenantDataSource(final String tenantID) {
		DataSource datasource = tenantDatasourceStore.get(tenantID);
		if (datasource == null) {
			try {
				datasource = (DataSource) InitialContext.doLookup("java:/" + tenantID);
			} catch (final NamingException e) {
				new ApplicationRuntimeException("Error occurred at JNDI lookup for tenant datatsource", e);
			}
			tenantDatasourceStore.put(tenantID, datasource);
		}
		return datasource;
	}

	@Override
	public void stop() {
		tenantDatasourceStore.clear();
		tenantDatasourceStore = null;
	}
}