| /* |
| * 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.cassandra.auth; |
| |
| import java.util.Set; |
| import java.util.concurrent.*; |
| |
| import com.google.common.base.Throwables; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| import com.google.common.util.concurrent.ListenableFuture; |
| import com.google.common.util.concurrent.ListenableFutureTask; |
| import com.google.common.util.concurrent.UncheckedExecutionException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.utils.MBeanWrapper; |
| |
| public class RolesCache implements RolesCacheMBean |
| { |
| private static final Logger logger = LoggerFactory.getLogger(RolesCache.class); |
| |
| private final String MBEAN_NAME = "org.apache.cassandra.auth:type=RolesCache"; |
| private final ThreadPoolExecutor cacheRefreshExecutor = new DebuggableThreadPoolExecutor("RolesCacheRefresh", |
| Thread.NORM_PRIORITY) |
| { |
| protected void afterExecute(Runnable r, Throwable t) |
| { |
| // empty to avoid logging on background updates |
| } |
| }; |
| private final IRoleManager roleManager; |
| private volatile LoadingCache<RoleResource, Set<RoleResource>> cache; |
| |
| public RolesCache(IRoleManager roleManager) |
| { |
| this.roleManager = roleManager; |
| this.cache = initCache(null); |
| MBeanWrapper.instance.registerMBean(this, MBEAN_NAME); |
| } |
| |
| public Set<RoleResource> getRoles(RoleResource role) |
| { |
| if (cache == null) |
| return roleManager.getRoles(role, true); |
| |
| try |
| { |
| return cache.get(role); |
| } |
| catch (ExecutionException | UncheckedExecutionException e) |
| { |
| Throwables.propagateIfInstanceOf(e.getCause(), RuntimeException.class); |
| throw Throwables.propagate(e); |
| } |
| } |
| |
| public void invalidate() |
| { |
| cache = initCache(null); |
| } |
| |
| public void setValidity(int validityPeriod) |
| { |
| DatabaseDescriptor.setRolesValidity(validityPeriod); |
| cache = initCache(cache); |
| } |
| |
| public int getValidity() |
| { |
| return DatabaseDescriptor.getRolesValidity(); |
| } |
| |
| public void setUpdateInterval(int updateInterval) |
| { |
| DatabaseDescriptor.setRolesUpdateInterval(updateInterval); |
| cache = initCache(cache); |
| } |
| |
| public int getUpdateInterval() |
| { |
| return DatabaseDescriptor.getRolesUpdateInterval(); |
| } |
| |
| |
| private LoadingCache<RoleResource, Set<RoleResource>> initCache(LoadingCache<RoleResource, Set<RoleResource>> existing) |
| { |
| if (!DatabaseDescriptor.getAuthenticator().requireAuthentication()) |
| return null; |
| |
| if (DatabaseDescriptor.getRolesValidity() <= 0) |
| return null; |
| |
| LoadingCache<RoleResource, Set<RoleResource>> newcache = CacheBuilder.newBuilder() |
| .refreshAfterWrite(DatabaseDescriptor.getRolesUpdateInterval(), TimeUnit.MILLISECONDS) |
| .expireAfterWrite(DatabaseDescriptor.getRolesValidity(), TimeUnit.MILLISECONDS) |
| .maximumSize(DatabaseDescriptor.getRolesCacheMaxEntries()) |
| .build(new CacheLoader<RoleResource, Set<RoleResource>>() |
| { |
| public Set<RoleResource> load(RoleResource primaryRole) |
| { |
| return roleManager.getRoles(primaryRole, true); |
| } |
| |
| public ListenableFuture<Set<RoleResource>> reload(final RoleResource primaryRole, |
| final Set<RoleResource> oldValue) |
| { |
| ListenableFutureTask<Set<RoleResource>> task; |
| task = ListenableFutureTask.create(new Callable<Set<RoleResource>>() |
| { |
| public Set<RoleResource> call() throws Exception |
| { |
| try |
| { |
| return roleManager.getRoles(primaryRole, true); |
| } catch (Exception e) |
| { |
| logger.trace("Error performing async refresh of user roles", e); |
| throw e; |
| } |
| } |
| }); |
| cacheRefreshExecutor.execute(task); |
| return task; |
| } |
| }); |
| if (existing != null) |
| newcache.putAll(existing.asMap()); |
| return newcache; |
| } |
| } |