001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.directory.mavibot.btree; 021 022 023/** 024 * An interface used to manage the transactions mechanism in B-trees. Transactions are cross 025 * B-trees. 026 * 027 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 028 */ 029public interface TransactionManager<K, V> 030{ 031 /** 032 * Starts a transaction 033 */ 034 void beginTransaction(); 035 036 037 /** 038 * Commits a transaction 039 */ 040 void commit(); 041 042 043 /** 044 * Rollback a transaction 045 */ 046 void rollback(); 047 048 049 /** 050 * Gets the current BtreeHeader for a given BTree. 051 * 052 * @param btreeName The Btree name we are looking the BtreeHeader for 053 * @return the current BTreeHeader 054 */ 055 BTreeHeader<K, V> getBTreeHeader( String btreeName ); 056 057 058 /** 059 * Updates the map of new BTreeHeaders 060 * 061 * @param btreeHeader The new BtreeHeader 062 */ 063 void updateNewBTreeHeaders( BTreeHeader<K, V> btreeHeader ); 064}