/*
* ModeShape (http://www.modeshape.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.modeshape.schematic;
/**
* Notification interface which is used by ModeShape to tell a 3rd party (typically a {@link SchematicDb}) when a transaction has
* been started, committed or rolled back from ModeShape's perspective. It also informs when locks have been obtained by ModeShape
* on certain resources.
* <p>
* Since ModeShape supports both user-managed transactions and internal transactions, the notification methods from this interface
* may be called in different contexts. For example, for a ModeShape-managed transaction the {@link #txStarted(String)} method
* will be called immediately after ModeShape starts a new transaction and the {@link #txCommitted(String)} or
* {@link #txRolledback(String)} methods right after ModeShape has committed or rolled back the transaction.
* </p>
* <p>
* On the other hand, for a non ModeShape-managed transaction the {@link #txStarted(String)} method will be called once ModeShape
* detects an active external transaction (which may've been created a while back) while the {@link #txCommitted(String)}
* and {@link #txRolledback(String)} methods will be called once the external transaction notifies ModeShape via a transaction
* synchronization.
* </p>
*
* @author Horia Chiorean (hchiorea@redhat.com)
* @since 5.0
*/
public interface TransactionListener {
/**
* Called by ModeShape once a ModeShape transaction has been created.
*
* @param id the tx id; never null
*/
void txStarted(String id);
/**
* Called by ModeShape once an existing transaction has been successfully committed. This may be either a single ModeShape
* transaction or a longer-spanning user transaction.
*
* @param id the tx id; never null
*/
void txCommitted(String id);
/**
* Called to indicate tha a transaction has been rolled back.
*
* @param id the tx id; never null
*/
void txRolledback(String id);
}