001 /* 002 * CDDL HEADER START 003 * 004 * The contents of this file are subject to the terms of the 005 * Common Development and Distribution License, Version 1.0 only 006 * (the "License"). You may not use this file except in compliance 007 * with the License. 008 * 009 * You can obtain a copy of the license at 010 * docs/licenses/cddl.txt 011 * or http://www.opensource.org/licenses/cddl1.php. 012 * See the License for the specific language governing permissions 013 * and limitations under the License. 014 * 015 * When distributing Covered Code, include this CDDL HEADER in each 016 * file and include the License file at 017 * docs/licenses/cddl.txt. If applicable, 018 * add the following below this CDDL HEADER, with the fields enclosed 019 * by brackets "[]" replaced with your own identifying information: 020 * Portions Copyright [yyyy] [name of copyright owner] 021 * 022 * CDDL HEADER END 023 * 024 * 025 * Copyright 2011-2014 UnboundID Corp. 026 */ 027 package com.unboundid.directory.sdk.ds.types; 028 029 import com.unboundid.directory.sdk.common.types.Entry; 030 import com.unboundid.ldap.sdk.Filter; 031 import com.unboundid.ldap.sdk.LDAPException; 032 import com.unboundid.util.NotExtensible; 033 import com.unboundid.util.ThreadSafety; 034 import com.unboundid.util.ThreadSafetyLevel; 035 036 /** 037 * This interface defines a set of methods that may be used to interact with a 038 * backend that has been defined in the server. 039 */ 040 @NotExtensible() 041 @ThreadSafety(level=ThreadSafetyLevel.INTERFACE_THREADSAFE) 042 public interface BackendContext 043 { 044 045 /** 046 * Retrieves the backend ID for this backend. 047 * 048 * @return The backend ID for this backend. 049 */ 050 String getBackendID(); 051 052 053 054 /** 055 * Retrieves the set of base DNs handled by the backend. 056 * 057 * @return The set of base DNs handled by the backend. 058 */ 059 String[] getBaseDNs(); 060 061 062 063 /** 064 * Retrieves the total number of entries contained in this backend, 065 * if that information is available. 066 * 067 * @return The total number of entries contained in this backend, 068 * or -1 if that information is not available. 069 */ 070 long getEntryCount(); 071 072 073 074 /** 075 * Indicates whether the backend is considered local (i.e., holds data in a 076 * repository that is local to and entirely managed by the server). 077 * 078 * @return {@code true} if the backend should be considered local, or 079 * {@code false} if the data may be held in some external repository. 080 */ 081 boolean isLocal(); 082 083 084 085 /** 086 * Indicates whether the backend is considered a private backend (with data 087 * generated and/or maintained by the server) rather than a public backend 088 * (with user data provided and managed by clients). 089 * 090 * @return {@code true} if the backend is considered a private backend within 091 * the server, or {@code false} if it is a public backend. 092 */ 093 boolean isPrivateBackend(); 094 095 096 097 /** 098 * Retrieves the {@link WritabilityMode} for the backend. 099 * 100 * @return The {@link WritabilityMode} for the backend. 101 */ 102 WritabilityMode getWritabilityMode(); 103 104 105 106 /** 107 * Indicates whether the backend considers filter components involving the 108 * specified attribute type and index type indexed. This may include 109 * attribute types for which an index has been explicitly configured in the 110 * backend, as well as attributes which are automatically considered indexed 111 * (e.g., because the backend holds only a small amount of data and considers 112 * all attributes indexed). 113 * 114 * @param attributeType The name or OID of the attribute type for which to 115 * make the determination. It must not be 116 * {@code null}. 117 * @param indexType The {@link IndexType} for which to make the 118 * determination. It must not be {@code null}. 119 * 120 * @return {@code true} if the specified attribute type is indexed for the 121 * given type of matching, or {@code false} if not. 122 */ 123 boolean isIndexed(final String attributeType, final IndexType indexType); 124 125 126 127 /** 128 * Indicates whether the backend has been explicitly configured with an 129 * index for the specified attribute type and index type. 130 * 131 * @param attributeType The name or OID of the attribute type for which to 132 * make the determination. It must not be 133 * {@code null}. 134 * @param indexType The {@link IndexType} for which to make the 135 * determination. It must not be {@code null}. 136 * 137 * @return {@code true} if the specified attribute type is indexed for the 138 * given type of matching, or {@code false} if not. 139 */ 140 boolean isExplicitlyIndexed(final String attributeType, 141 final IndexType indexType); 142 143 144 145 /** 146 * Indicates whether the backend may consider a search with the provided 147 * filter as indexed. 148 * 149 * @param filter The {@link Filter} for which to make the determination. 150 * It must not be {@code null}. 151 * 152 * @return {@code true} if a search with the provided filter may be 153 * considered indexed in the backend, or {@code false} if not. 154 */ 155 boolean isIndexed(final Filter filter); 156 157 158 159 /** 160 * Indicates whether the specified entry exists in the backend. 161 * 162 * @param dn The DN for which to make the determination. It must not be 163 * {@code null}. 164 * 165 * @return {@code true} if the specified entry exists in the backend, or 166 * {@code false} if not. 167 * 168 * @throws LDAPException If the provided string cannot be parsed as a valid 169 * DN or if a problem is encountered while making the 170 * determination. 171 */ 172 boolean entryExists(final String dn) throws LDAPException; 173 174 175 176 /** 177 * Retrieves the specified entry from the backend. 178 * 179 * @param dn The DN for which to make the determination. It must not be 180 * {@code null}. 181 * 182 * @return The entry with the specified DN, or {@code null} if the entry does 183 * not exist in the backend. 184 * 185 * @throws LDAPException If the provided string cannot be parsed as a valid 186 * DN or if a problem is encountered while attempting 187 * to retrieve it. 188 */ 189 Entry getEntry(final String dn) throws LDAPException; 190 191 192 193 /** 194 * Indicates whether this backend should contain the entry with the specified 195 * DN. 196 * 197 * @param dn The DN of the entry for which to make the determination. 198 * 199 * @return {@code true} if this backend handles operations for the 200 * provided entry, or {@code false} if it does not. 201 * 202 * @throws LDAPException If the provided string cannot be parsed as a valid 203 * DN or if a problem is encountered while making the 204 * determination. 205 */ 206 boolean handlesEntry(String dn) throws LDAPException; 207 208 209 210 /** 211 * Retrieves information about the parent for the associated backend, if any. 212 * 213 * @return Information about the parent for the associated backend, or 214 * {@code null} if the backend does not have a parent. 215 */ 216 BackendContext getParentBackend(); 217 218 219 220 /** 221 * Retrieves information about any backends which are immediately subordinate 222 * to the associated backend. 223 * 224 * @return Information about any backends which are immediately subordinate 225 * to the associated backend, or an empty array if there are no 226 * subordinate backends. 227 */ 228 BackendContext[] getSubordinateBackends(); 229 }