mergetest.java

介绍了hibernate的入门有一些基本常用的事例

//$Id: MergeTest.java,v 1.5 2005/02/21 14:41:02 oneovthafew Exp $
package org.hibernate.test.ops;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;
import org.hibernate.event.ejb3.EJB3AutoFlushEventListener;
import org.hibernate.event.ejb3.EJB3FlushEventListener;
import org.hibernate.test.TestCase;

/**
 * @author Gavin King
 */
public class MergeTest extends TestCase {
	
	public MergeTest(String str) {
		super(str);
	}
	
	public void testMergeTree() {
		
		clearCounts();
		
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Node root = new Node("root");
		Node child = new Node("child");
		root.addChild(child);
		s.persist(root);
		tx.commit();
		s.close();
		
		assertInsertCount(2);
		clearCounts();
		
		root.setDescription("The root node");
		child.setDescription("The child node");
		
		Node secondChild = new Node("second child");
		
		root.addChild(secondChild);
		
		s = openSession();
		tx = s.beginTransaction();
		s.merge(root);
		tx.commit();
		s.close();
		
		assertInsertCount(1);
		assertUpdateCount(2);
		
	}
		
	public void testMergeTreeWithGeneratedId() {
		
		clearCounts();
		
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		NumberedNode root = new NumberedNode("root");
		NumberedNode child = new NumberedNode("child");
		root.addChild(child);
		s.persist(root);
		tx.commit();
		s.close();
		
		assertInsertCount(2);
		clearCounts();
		
		root.setDescription("The root node");
		child.setDescription("The child node");
		
		NumberedNode secondChild = new NumberedNode("second child");
		
		root.addChild(secondChild);
		
		s = openSession();
		tx = s.beginTransaction();
		s.merge(root);
		tx.commit();
		s.close();
		
		assertInsertCount(1);
		assertUpdateCount(2);
		
	}
		
	private void clearCounts() {
		getSessions().getStatistics().clear();
	}
	
	private void assertInsertCount(int count) {
		int inserts = (int) getSessions().getStatistics().getEntityInsertCount();
		assertEquals(count, inserts);
	}
		
	private void assertUpdateCount(int count) {
		int updates = (int) getSessions().getStatistics().getEntityUpdateCount();
		assertEquals(count, updates);
	}
		
	protected void configure(Configuration cfg) {
		cfg.setListener( "flush", new EJB3FlushEventListener() );
		cfg.setListener( "auto-flush", new EJB3AutoFlushEventListener() );
		cfg.setProperty(Environment.GENERATE_STATISTICS, "true");
		cfg.setProperty(Environment.STATEMENT_BATCH_SIZE, "0");		
	}
	
	protected String[] getMappings() {
		return new String[] { "ops/Node.hbm.xml" };
	}

	public static Test suite() {
		return new TestSuite(MergeTest.class);
	}

}