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/*
 * Copyright (c) 2010-2012 Eike Stepper (Berlin, Germany) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Eike Stepper - initial API and implementation
 *    Simon McDuff - bug 201266
 *    Simon McDuff - bug 233314
 *    Simon McDuff - bug 247143
 */
package org.eclipse.emf.cdo.transaction;

import org.eclipse.emf.cdo.common.commit.CDOCommitInfo;

/**
 * A call-back interface that is called by a {@link CDOTransaction transcation} before it is committed and after it has
 * been committed or rolled back.
 *
 * @author Eike Stepper
 * @since 4.0
 */
public interface CDOTransactionHandler2 extends CDOTransactionHandlerBase
{
  /**
   * Called by a <code>CDOTransaction</code> <b>before</b> it is being committed. The implementor of this method is
   * allowed to throw an unchecked exception that will propagate up to the operation that is about to commit the
   * transaction (thereby preventing the operation from completing successfully). The implementor of this method is
   * allowed to apply changes to the object graph managed by the transaction.
   */
  public void committingTransaction(CDOTransaction transaction, CDOCommitContext commitContext);

  /**
   * Called by a <code>CDOTransaction</code> <b>after</b> it is being committed. The implementor of this method is
   * <b>not</b> allowed to throw an unchecked exception.
   * <p>
   * If you're interested in the results of the commit operation consider to implement
   * {@link CDOTransactionHandler3#committedTransaction(CDOTransaction, CDOCommitContext, CDOCommitInfo)
   * CDOTransactionHandler3.committedTransaction()}.
   */
  public void committedTransaction(CDOTransaction transaction, CDOCommitContext commitContext);

  /**
   * Called by a <code>CDOTransaction</code> <b>after</b> it is rolled back. If the implementor of this method throws an
   * exception it will be logged as an error and subsequent handlers will be further called.
   */
  public void rolledBackTransaction(CDOTransaction transaction);
}