/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.test.connections;

import org.junit.Test;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.context.internal.ThreadLocalSessionContext;
import org.hibernate.dialect.H2Dialect;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.transaction.spi.LocalStatus;
import org.hibernate.testing.RequiresDialect;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * @author Steve Ebersole
 */
@RequiresDialect(H2Dialect.class)
public class ThreadLocalCurrentSessionTest extends ConnectionManagementTestCase {
	@Override
	public void configure(Configuration cfg) {
		super.configure( cfg );
		cfg.setProperty( Environment.CURRENT_SESSION_CONTEXT_CLASS, TestableThreadLocalContext.class.getName() );
		cfg.setProperty( Environment.GENERATE_STATISTICS, "true" );
	}

	@Override
	protected Session getSessionUnderTest() throws Throwable {
		Session session = sessionFactory().getCurrentSession();
		session.beginTransaction();
		return session;
	}

	@Override
	protected void release(Session session) {
		if ( session.getTransaction().getLocalStatus() != LocalStatus.ACTIVE ) {
			TestableThreadLocalContext.unbind( sessionFactory() );
			return;
		}
		long initialCount = sessionFactory().getStatistics().getSessionCloseCount();
		session.getTransaction().commit();
		long subsequentCount = sessionFactory().getStatistics().getSessionCloseCount();
		assertEquals( "Session still open after commit", initialCount + 1, subsequentCount );
		// also make sure it was cleaned up from the internal ThreadLocal...
		assertFalse( "session still bound to internal ThreadLocal", TestableThreadLocalContext.hasBind() );
	}

	@Override
	protected void reconnect(Session session) throws Throwable {
	}

	@Override
	protected void checkSerializedState(Session session) {
		assertFalse( "session still bound after serialize", TestableThreadLocalContext.isSessionBound( session ) );
	}

	@Override
	protected void checkDeserializedState(Session session) {
		assertTrue( "session not bound after deserialize", TestableThreadLocalContext.isSessionBound( session ) );
	}

	@Test
	public void testTransactionProtection() {
		Session session = sessionFactory().getCurrentSession();
		try {
			session.createQuery( "from Silly" );
			fail( "method other than beginTransaction{} allowed" );
		}
		catch ( HibernateException e ) {
			// ok
		}
	}

	@Test
	public void testContextCleanup() {
		Session session = sessionFactory().getCurrentSession();
		session.beginTransaction();
		session.getTransaction().commit();
		assertFalse( "session open after txn completion", session.isOpen() );
		assertFalse( "session still bound after txn completion", TestableThreadLocalContext.isSessionBound( session ) );

		Session session2 = sessionFactory().getCurrentSession();
		assertFalse( "same session returned after txn completion", session == session2 );
		session2.close();
		assertFalse( "session open after closing", session2.isOpen() );
		assertFalse( "session still bound after closing", TestableThreadLocalContext.isSessionBound( session2 ) );
	}

	public static class TestableThreadLocalContext extends ThreadLocalSessionContext {
		private static TestableThreadLocalContext me;

		public TestableThreadLocalContext(SessionFactoryImplementor factory) {
			super( factory );
			me = this;
		}

		public static boolean isSessionBound(Session session) {
			return sessionMap() != null && sessionMap().containsKey( me.factory() )
					&& sessionMap().get( me.factory() ) == session;
		}

		public static boolean hasBind() {
			return sessionMap() != null && sessionMap().containsKey( me.factory() );
		}
	}
}