[GitHub] incubator-hawq pull request #1379: HAWQ-1622. Cache PXF proxy UGI so that cl...

[frankgh <gi...@git.apache.org>]

Github user frankgh commented on a diff in the pull request:

    https://github.com/apache/incubator-hawq/pull/1379#discussion_r200793774
  
    --- Diff: pxf/pxf-service/src/main/java/org/apache/hawq/pxf/service/UGICache.java ---
    @@ -0,0 +1,129 @@
    +package org.apache.hawq.pxf.service;
    +
    +/*
    + * 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.
    + */
    +
    +import java.io.IOException;
    +import java.util.Map;
    +import java.util.concurrent.ConcurrentHashMap;
    +import java.util.concurrent.DelayQueue;
    +
    +import org.apache.commons.logging.Log;
    +import org.apache.commons.logging.LogFactory;
    +import org.apache.hadoop.fs.FileSystem;
    +import org.apache.hadoop.security.UserGroupInformation;
    +
    +public class UGICache {
    +
    +    private static final Log LOG = LogFactory.getLog(UGICache.class);
    +    private static Map<SegmentTransactionId, TimedProxyUGI> cache = new ConcurrentHashMap<>();
    +    //private static DelayQueue<TimedProxyUGI> delayQueue = new DelayQueue<>();
    +    private static DelayQueue<TimedProxyUGI>[] delayQueues = new DelayQueue<>[64];
    --- End diff --
    
    Are we limiting to 64 segments?


---