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.memory; 21 22 23 /** 24 * An enum to describe the BTree type. We have three possible type : 25 * <ul> 26 * <li>IN_MEMORY : the BTree will remain in memory, and won't be persisted on disk</li> 27 * <li>PERSISTENT : the BTree is in memory, but will be persisted on disk</li> 28 * <li>MANAGED : the BTree is managed by a RecordManager, and some pages may 29 * be swapped out from memory on demand</li> 30 * </ul> 31 * 32 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 33 */ 34 public enum BTreeTypeEnum 35 { 36 /** Pure in-memory BTree, not persisted on disk */ 37 IN_MEMORY, 38 39 /** In-memory BTree but persisted on disk */ 40 PERSISTENT 41 }