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 *  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
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 *
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 *  Unless required by applicable law or agreed to in writing,
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 *  KIND, either express or implied.  See the License for the
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package org.apache.cayenne.configuration.server;

import java.sql.Driver;

import javax.sql.DataSource;

import org.apache.cayenne.ConfigurationException;
import org.apache.cayenne.configuration.Constants;
import org.apache.cayenne.configuration.DataNodeDescriptor;
import org.apache.cayenne.configuration.RuntimeProperties;
import org.apache.cayenne.conn.DataSourceInfo;
import org.apache.cayenne.datasource.DataSourceBuilder;
import org.apache.cayenne.datasource.UnmanagedPoolingDataSource;
import org.apache.cayenne.di.AdhocObjectFactory;
import org.apache.cayenne.di.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A {@link DataSourceFactory} that loads JDBC connection information from an
 * XML resource associated with the DataNodeDescriptor, returning a DataSource
 * with simple connection pooling.
 * 
 * @since 3.1
 */
// TODO: this factory does not read XML anymore, should we rename it to
// something else?
public class XMLPoolingDataSourceFactory implements DataSourceFactory {

	private static final Logger logger = LoggerFactory.getLogger(XMLPoolingDataSourceFactory.class);

	@Inject
	private RuntimeProperties properties;

	@Inject
	private AdhocObjectFactory objectFactory;

	@Override
	public DataSource getDataSource(DataNodeDescriptor nodeDescriptor) throws Exception {

		DataSourceInfo descriptor = nodeDescriptor.getDataSourceDescriptor();

		if (descriptor == null) {
			String message = "Null dataSourceDescriptor for nodeDescriptor '" + nodeDescriptor.getName() + "'";
			logger.info(message);
			throw new ConfigurationException(message);
		}

		long maxQueueWaitTime = properties.getLong(Constants.JDBC_MAX_QUEUE_WAIT_TIME,
				UnmanagedPoolingDataSource.MAX_QUEUE_WAIT_DEFAULT);

		Driver driver = objectFactory.newInstance(Driver.class, descriptor.getJdbcDriver());

		return DataSourceBuilder.url(descriptor.getDataSourceUrl()).driver(driver).userName(descriptor.getUserName())
				.password(descriptor.getPassword())
				.pool(descriptor.getMinConnections(), descriptor.getMaxConnections())
				.maxQueueWaitTime(maxQueueWaitTime).build();
	}

}