| /* |
| * 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.accumulo.server.conf; |
| |
| import java.util.Map; |
| import java.util.function.Predicate; |
| |
| import org.apache.accumulo.core.Constants; |
| import org.apache.accumulo.core.client.Instance; |
| import org.apache.accumulo.core.conf.ConfigurationObserver; |
| import org.apache.accumulo.core.conf.ObservableConfiguration; |
| import org.apache.accumulo.core.conf.Property; |
| import org.apache.accumulo.core.zookeeper.ZooUtil; |
| import org.apache.accumulo.fate.zookeeper.ZooCache; |
| import org.apache.accumulo.fate.zookeeper.ZooCacheFactory; |
| import org.apache.accumulo.server.conf.ZooCachePropertyAccessor.PropCacheKey; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class TableConfiguration extends ObservableConfiguration { |
| private static final Logger log = LoggerFactory.getLogger(TableConfiguration.class); |
| |
| private static final Map<PropCacheKey,ZooCache> propCaches = new java.util.HashMap<>(); |
| |
| private ZooCachePropertyAccessor propCacheAccessor = null; |
| private final Instance instance; |
| private final NamespaceConfiguration parent; |
| private ZooCacheFactory zcf = new ZooCacheFactory(); |
| |
| private final String tableId; |
| |
| public TableConfiguration(Instance instance, String tableId, NamespaceConfiguration parent) { |
| this.instance = instance; |
| this.tableId = tableId; |
| this.parent = parent; |
| } |
| |
| void setZooCacheFactory(ZooCacheFactory zcf) { |
| this.zcf = zcf; |
| } |
| |
| private synchronized ZooCachePropertyAccessor getPropCacheAccessor() { |
| if (propCacheAccessor == null) { |
| synchronized (propCaches) { |
| PropCacheKey key = new PropCacheKey(instance.getInstanceID(), tableId); |
| ZooCache propCache = propCaches.get(key); |
| if (propCache == null) { |
| propCache = zcf.getZooCache(instance.getZooKeepers(), instance.getZooKeepersSessionTimeOut(), new TableConfWatcher(instance)); |
| propCaches.put(key, propCache); |
| } |
| propCacheAccessor = new ZooCachePropertyAccessor(propCache); |
| } |
| } |
| return propCacheAccessor; |
| } |
| |
| @Override |
| public void addObserver(ConfigurationObserver co) { |
| if (tableId == null) { |
| String err = "Attempt to add observer for non-table configuration"; |
| log.error(err); |
| throw new RuntimeException(err); |
| } |
| iterator(); |
| super.addObserver(co); |
| } |
| |
| @Override |
| public void removeObserver(ConfigurationObserver co) { |
| if (tableId == null) { |
| String err = "Attempt to remove observer for non-table configuration"; |
| log.error(err); |
| throw new RuntimeException(err); |
| } |
| super.removeObserver(co); |
| } |
| |
| private String getPath() { |
| return ZooUtil.getRoot(instance.getInstanceID()) + Constants.ZTABLES + "/" + tableId + Constants.ZTABLE_CONF; |
| } |
| |
| @Override |
| public String get(Property property) { |
| return getPropCacheAccessor().get(property, getPath(), parent); |
| } |
| |
| @Override |
| public void getProperties(Map<String,String> props, Predicate<String> filter) { |
| getPropCacheAccessor().getProperties(props, getPath(), filter, parent, null); |
| } |
| |
| public String getTableId() { |
| return tableId; |
| } |
| |
| /** |
| * returns the actual NamespaceConfiguration that corresponds to the current parent namespace. |
| */ |
| public NamespaceConfiguration getNamespaceConfiguration() { |
| return new ServerConfigurationFactory(parent.inst).getNamespaceConfiguration(parent.namespaceId); |
| } |
| |
| /** |
| * Gets the parent configuration of this configuration. The parent is actually a {@link TableParentConfiguration} that can change which namespace it |
| * references. |
| * |
| * @return parent configuration |
| */ |
| public NamespaceConfiguration getParentConfiguration() { |
| return parent; |
| } |
| |
| @Override |
| public synchronized void invalidateCache() { |
| if (null != propCacheAccessor) { |
| propCacheAccessor.invalidateCache(); |
| } |
| // Else, if the accessor is null, we could lock and double-check |
| // to see if it happened to be created so we could invalidate its cache |
| // but I don't see much benefit coming from that extra check. |
| } |
| |
| @Override |
| public String toString() { |
| return this.getClass().getSimpleName(); |
| } |
| } |