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From mxm <...@git.apache.org>
Subject [GitHub] flink pull request #2315: [FLINK-1984] Integrate Flink with Apache Mesos (T1...
Date Thu, 18 Aug 2016 10:22:43 GMT
Github user mxm commented on a diff in the pull request:

    --- Diff: flink-mesos/src/main/java/org/apache/flink/mesos/runtime/clusterframework/store/ZooKeeperMesosWorkerStore.java
    @@ -0,0 +1,290 @@
    + * 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.flink.mesos.runtime.clusterframework.store;
    +import org.apache.curator.framework.CuratorFramework;
    +import org.apache.curator.framework.recipes.shared.SharedCount;
    +import org.apache.curator.framework.recipes.shared.SharedValue;
    +import org.apache.curator.framework.recipes.shared.VersionedValue;
    +import org.apache.flink.api.java.tuple.Tuple2;
    +import org.apache.flink.configuration.ConfigConstants;
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.runtime.state.StateHandle;
    +import org.apache.flink.runtime.util.ZooKeeperUtils;
    +import org.apache.flink.runtime.zookeeper.StateStorageHelper;
    +import org.apache.flink.runtime.zookeeper.ZooKeeperStateHandleStore;
    +import org.apache.mesos.Protos;
    +import org.apache.zookeeper.KeeperException;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +import scala.Option;
    +import java.util.ArrayList;
    +import java.util.Collections;
    +import java.util.ConcurrentModificationException;
    +import java.util.List;
    +import static org.apache.flink.util.Preconditions.checkNotNull;
    +import static org.apache.flink.util.Preconditions.checkState;
    + * A ZooKeeper-backed Mesos worker store.
    + */
    +public class ZooKeeperMesosWorkerStore implements MesosWorkerStore {
    +	private static final Logger LOG = LoggerFactory.getLogger(ZooKeeperMesosWorkerStore.class);
    +	private final Object cacheLock = new Object();
    --- End diff --
    Seems like the store should only be accessed by the ResourceManager. In this case we could
remove the lock.

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