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

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Here is the source code for org.apache.cayenne.configuration.server.JNDIDataSourceFactory.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
 *  "License"); you may not use this file except in compliance
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package org.apache.cayenne.configuration.server;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

import org.apache.cayenne.CayenneRuntimeException;
import org.apache.cayenne.configuration.DataNodeDescriptor;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Locates DataSource mapped via JNDI.
 * 
 * @since 3.1
 */
public class JNDIDataSourceFactory implements DataSourceFactory {

    private static final Log LOGGER = LogFactory.getLog(JNDIDataSourceFactory.class);

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

        String location = getLocation(nodeDescriptor);

        try {
            return lookupViaJNDI(location);
        } catch (Exception e) {
            LOGGER.info("*** failed JNDI lookup of DataSource at location: " + location, e);
            throw e;
        }
    }

    protected String getLocation(DataNodeDescriptor nodeDescriptor) {
        String location = nodeDescriptor.getParameters();
        if (location == null) {
            throw new CayenneRuntimeException("Null 'location' for nodeDescriptor '%s'", nodeDescriptor.getName());
        }

        return location;
    }

    DataSource lookupViaJNDI(String location) throws NamingException {

        LOGGER.info("Connecting. JNDI path: " + location);

        Context context = new InitialContext();
        DataSource dataSource;
        try {
            Context envContext = (Context) context.lookup("java:comp/env");
            dataSource = (DataSource) envContext.lookup(location);
        } catch (NamingException namingEx) {
            // try looking up the location directly...
            dataSource = (DataSource) context.lookup(location);
        }

        LOGGER.info("Found JNDI DataSource at location: " + location);

        return dataSource;
    }

}