org.apache.cayenne.configuration.server.DBCPDataSourceFactory.java Source code

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Here is the source code for org.apache.cayenne.configuration.server.DBCPDataSourceFactory.java

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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
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package org.apache.cayenne.configuration.server;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.configuration.DataNodeDescriptor;
import org.apache.cayenne.resource.Resource;
import org.apache.commons.dbcp2.BasicDataSourceFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A {@link DataSourceFactory} based on DBCP2 connection pool library.
 */
public class DBCPDataSourceFactory implements DataSourceFactory {

    private static final String DBCP2_PROPERTIES = "dbcp2.properties";

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

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

        String location = nodeDescriptor.getParameters();
        if (location == null) {
            logger.debug("No explicit DBCP2 config location, will use default location: " + DBCP2_PROPERTIES);
            location = DBCP2_PROPERTIES;
        }

        Resource baseConfiguration = nodeDescriptor.getConfigurationSource();
        if (baseConfiguration == null) {
            throw new CayenneRuntimeException("Null 'configurationSource' for nodeDescriptor '%s'",
                    nodeDescriptor.getName());
        }

        Resource dbcp2Configuration = baseConfiguration.getRelativeResource(location);
        if (dbcp2Configuration == null) {
            throw new CayenneRuntimeException("Missing DBCP2 configuration '%s' for nodeDescriptor '%s'", location,
                    nodeDescriptor.getName());
        }

        Properties properties = getProperties(dbcp2Configuration);
        if (logger.isDebugEnabled()) {
            logger.debug("DBCP2 Properties: " + properties);
        }

        return BasicDataSourceFactory.createDataSource(properties);
    }

    private Properties getProperties(Resource dbcp2Configuration) throws IOException {
        Properties properties = new Properties();

        try (InputStream in = dbcp2Configuration.getURL().openStream();) {
            properties.load(in);
        }

        return properties;
    }
}