1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.directory.mavibot.btree; 21 22 /** 23 * An interface used to manage the transactions mechanism in B-trees. Transactions are cross 24 * B-trees. 25 * 26 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 27 */ 28 public interface TransactionManager 29 { 30 /** 31 * Starts a transaction 32 */ 33 void beginTransaction(); 34 35 36 /** 37 * Commits a transaction 38 */ 39 void commit(); 40 41 42 /** 43 * Rollback a transaction 44 */ 45 void rollback(); 46 47 48 /** 49 * Gets the current BtreeHeader for a given BTree. 50 * 51 * @param btreeName The Btree name we are looking the BtreeHeader for 52 * @return the current BTreeHeader 53 */ 54 BTreeHeader<?, ?> getBTreeHeader( String btreeName ); 55 56 57 /** 58 * Updates the map of new BTreeHeaders 59 * 60 * @param btreeHeader The new BtreeHeader 61 */ 62 void updateNewBTreeHeaders( BTreeHeader<?, ?> btreeHeader ); 63 }