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From hanm <...@git.apache.org>
Subject [GitHub] zookeeper pull request #590: [ZOOKEEPER-1177] Add the memory optimized watch...
Date Sat, 22 Sep 2018 04:38:34 GMT
Github user hanm commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/590#discussion_r219642002
  
    --- Diff: src/java/main/org/apache/zookeeper/server/watch/IWatchManager.java ---
    @@ -0,0 +1,144 @@
    +/**
    + * 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.zookeeper.server.watch;
    +
    +import java.io.PrintWriter;
    +import java.util.HashMap;
    +import java.util.HashSet;
    +import java.util.Map;
    +import java.util.Map.Entry;
    +import java.util.Set;
    +import java.util.concurrent.ConcurrentHashMap;
    +
    +import org.apache.zookeeper.Watcher;
    +import org.apache.zookeeper.Watcher.Event.EventType;
    +import org.apache.zookeeper.server.ServerCnxn;
    +
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +public interface IWatchManager {
    +
    +    /**
    +     * Add watch to specific path.
    +     *
    +     * @param path znode path
    +     * @param watcher watcher object reference
    +     *
    +     * @return true if the watcher added is not already present
    +     */
    +    public boolean addWatch(String path, Watcher watcher);
    +
    +    /**
    +     * Checks the specified watcher exists for the given path
    +     *
    +     * @param path znode path
    +     * @param watcher watcher object reference
    +     *
    +     * @return true if the watcher exists, false otherwise
    +     */
    +    public boolean containsWatcher(String path, Watcher watcher);
    +
    +    /**
    +     * Removes the specified watcher for the given path
    --- End diff --
    
    nit: missing full stop at end of sentence.


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