| /** |
| * 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.pulsar.zookeeper; |
| |
| import org.apache.bookkeeper.common.util.OrderedExecutor; |
| import org.apache.zookeeper.WatchedEvent; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Per ZK client ZooKeeper cache supporting ZNode data and children list caches. A cache entry is identified, accessed |
| * and invalidated by the ZNode path. For the data cache, ZNode data parsing is done at request time with the given |
| * {@link Deserializer} argument. |
| * |
| * @param <T> |
| */ |
| public class LocalZooKeeperCache extends ZooKeeperCache { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(LocalZooKeeperCache.class); |
| |
| public LocalZooKeeperCache(final ZooKeeper zk, final OrderedExecutor executor) { |
| super(zk, executor); |
| } |
| |
| @Override |
| public <T> void process(WatchedEvent event, final CacheUpdater<T> updater) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Got Local ZooKeeper WatchedEvent: EventType: {}, KeeperState: {}, Path: {}", event.getType(), |
| event.getState(), event.getPath()); |
| } |
| if (event.getType() == Event.EventType.None) { |
| switch (event.getState()) { |
| case Expired: |
| // in case of expired, the zkSession is no longer good |
| LOG.warn("Lost connection from local ZK. Invalidating the whole cache."); |
| dataCache.synchronous().invalidateAll(); |
| childrenCache.invalidateAll(); |
| return; |
| default: |
| break; |
| } |
| } |
| super.process(event, updater); |
| } |
| } |