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Jodd DB is efficient and thin database facade; DbOom is convenient database object mapper.

There is a newer version: 6.0.0

// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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package jodd.db;

import jodd.log.Logger;
import jodd.log.LoggerFactory;

/**
 * Returns {@link DbSession} assigned to current thread.
 * @see DbThreadSession
 * @see ThreadDbSessionHolder
 */
public class ThreadDbSessionProvider implements DbSessionProvider {

	private static final Logger log = LoggerFactory.getLogger(ThreadDbSessionProvider.class);

	/**
	 * {@inheritDoc}
	 */
	@Override
	public DbSession getDbSession() {
		log.debug("Requesting thread session");

		final DbSession session = ThreadDbSessionHolder.get();

		if (session == null) {
			throw new DbSqlException(
					"No DbSession associated with current thread." +
					"It seems that ThreadDbSessionHolder is not used.");
		}
		return session;
	}


}