| /* |
| * 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.jackrabbit.oak.security.authorization.permission; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * {@code PermissionEntryCache} caches the permission entries of principals. |
| * The cache is held locally for each session and contains a version of the principal permission |
| * entries of the session that read them last. |
| */ |
| class PermissionEntryCache { |
| |
| private static final Logger log = LoggerFactory.getLogger(PermissionEntryCache.class); |
| |
| private final Map<String, PrincipalPermissionEntries> entries = new HashMap<>(); |
| |
| @NotNull |
| PrincipalPermissionEntries getFullyLoadedEntries(@NotNull PermissionStore store, |
| @NotNull String principalName) { |
| PrincipalPermissionEntries ppe = entries.get(principalName); |
| if (ppe == null || !ppe.isFullyLoaded()) { |
| ppe = store.load(principalName); |
| entries.put(principalName, ppe); |
| } |
| return ppe; |
| } |
| |
| void init(@NotNull String principalName, long expectedSize) { |
| if (!entries.containsKey(principalName)) { |
| entries.put(principalName, new PrincipalPermissionEntries(expectedSize)); |
| } |
| } |
| |
| void load(@NotNull PermissionStore store, |
| @NotNull Collection<PermissionEntry> ret, |
| @NotNull String principalName, |
| @NotNull String path) { |
| if (entries.containsKey(principalName)) { |
| PrincipalPermissionEntries ppe = entries.get(principalName); |
| Collection<PermissionEntry> pes = ppe.getEntriesByPath(path); |
| if (ppe.isFullyLoaded() || pes != null) { |
| // no need to read from store |
| if (pes != null) { |
| ret.addAll(pes); |
| } |
| } else { |
| // read entries for path from store |
| pes = store.load(principalName, path); |
| if (pes == null) { |
| // nothing to add to the result collection 'ret'. |
| // nevertheless, remember the absence of any permission entries |
| // in the cache to avoid reading from store again. |
| ppe.putEntriesByPath(path, Collections.emptySet()); |
| } else { |
| ppe.putEntriesByPath(path, pes); |
| ret.addAll(pes); |
| } |
| } |
| } else { |
| log.error("Failed to load entries for principal '%s' at path %s", principalName, path); |
| } |
| } |
| } |