| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.openjpa.jdbc.kernel; |
| |
| import org.apache.openjpa.jdbc.sql.Select; |
| import org.apache.openjpa.kernel.LockManager; |
| import org.apache.openjpa.kernel.OpenJPAStateManager; |
| |
| /** |
| * Extension of the {@link LockManager} interface with methods for |
| * datastore locking during the select and load process. Implementors of |
| * this interface can also take advantage of the fact that in the |
| * {@link LockManager#lock} and {@link LockManager#lockAll} methods, the |
| * given <code>conn</code> parameter, if any, will be an instance of |
| * {@link ConnectionInfo}. |
| * |
| * @author Abe White |
| */ |
| public interface JDBCLockManager |
| extends LockManager { |
| |
| /** |
| * Return whether to issue the given select FOR UPDATE, depending on |
| * the capabilities of the dictionary and the fetch configuration. |
| */ |
| public boolean selectForUpdate(Select sel, int lockLevel); |
| |
| /** |
| * Notification that the given instance was loaded via a result set |
| * produced by a FOR UPDATE select. |
| */ |
| public void loadedForUpdate(OpenJPAStateManager sm); |
| } |