[ https://issues.apache.org/jira/browse/CURATOR-33?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066725#comment-14066725 ]
ASF GitHub Bot commented on CURATOR-33: --------------------------------------- Github user cconroy commented on a diff in the pull request: https://github.com/apache/curator/pull/17#discussion_r15127380 --- Diff: curator-recipes/src/main/java/org/apache/curator/framework/recipes/cache/TreeCache.java --- @@ -0,0 +1,600 @@ +/** + * 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.curator.framework.recipes.cache; + +import com.google.common.base.Function; +import com.google.common.collect.ImmutableSortedSet; +import com.google.common.collect.Maps; +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.framework.api.BackgroundCallback; +import org.apache.curator.framework.api.CuratorEvent; +import org.apache.curator.framework.listen.ListenerContainer; +import org.apache.curator.framework.state.ConnectionState; +import org.apache.curator.framework.state.ConnectionStateListener; +import org.apache.curator.utils.CloseableExecutorService; +import org.apache.curator.utils.ThreadUtils; +import org.apache.curator.utils.ZKPaths; +import org.apache.zookeeper.KeeperException; +import org.apache.zookeeper.WatchedEvent; +import org.apache.zookeeper.Watcher; +import org.apache.zookeeper.data.Stat; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import java.io.Closeable; +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.SortedSet; +import java.util.concurrent.ConcurrentMap; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.ThreadFactory; +import java.util.concurrent.atomic.AtomicLong; +import java.util.concurrent.atomic.AtomicReference; + +/** + * <p>A utility that attempts to keep all data from all children of a ZK path locally cached. This class + * will watch the ZK path, respond to update/create/delete events, pull down the data, etc. You can + * register a listener that will get notified when changes occur.</p> + * <p></p> + * <p><b>IMPORTANT</b> - it's not possible to stay transactionally in sync. Users of this class must --- End diff -- Worth doing more than just tree-order on re-sync but also giving zkId order? Probably not since I can think of edge cases where interleaved creations and deletions would cause pure mzkid ordering to conflict with tree order... > Recursive Node Cache > -------------------- > > Key: CURATOR-33 > URL: https://issues.apache.org/jira/browse/CURATOR-33 > Project: Apache Curator > Issue Type: Improvement > Components: Recipes > Reporter: John Vines > Fix For: awaiting-response > > Attachments: CURATOR-33.2.patch, CURATOR-33.patch > > > Currently the PathChildrenCache will trigger listen events for all children > at the given node. However, it would be useful to have a cache that would > trigger listen events for the entire hierarchy below the given node. -- This message was sent by Atlassian JIRA (v6.2#6252)