org.apache.hadoop.hive.ql.exec.tez.Utils.java Source code

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Here is the source code for org.apache.hadoop.hive.ql.exec.tez.Utils.java

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/**
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.hadoop.hive.ql.exec.tez;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import com.google.common.base.Preconditions;
import org.apache.commons.lang.ArrayUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.llap.registry.ServiceInstance;
import org.apache.hadoop.hive.llap.registry.impl.LlapRegistryService;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.split.SplitLocationProvider;
import org.slf4j.Logger;

public class Utils {
    public static SplitLocationProvider getSplitLocationProvider(Configuration conf, Logger LOG)
            throws IOException {
        boolean useCustomLocations = HiveConf.getVar(conf, HiveConf.ConfVars.HIVE_EXECUTION_MODE).equals("llap")
                && HiveConf.getBoolVar(conf, HiveConf.ConfVars.LLAP_CLIENT_CONSISTENT_SPLITS);
        SplitLocationProvider splitLocationProvider;
        LOG.info("SplitGenerator using llap affinitized locations: " + useCustomLocations);
        if (useCustomLocations) {
            LlapRegistryService serviceRegistry = LlapRegistryService.getClient(conf);
            LOG.info("Using LLAP instance " + serviceRegistry.getApplicationId());

            Collection<ServiceInstance> serviceInstances = serviceRegistry.getInstances()
                    .getAllInstancesOrdered(true);
            Preconditions.checkArgument(!serviceInstances.isEmpty(),
                    "No running LLAP daemons! Please check LLAP service status and zookeeper configuration");
            ArrayList<String> locations = new ArrayList<>(serviceInstances.size());
            for (ServiceInstance serviceInstance : serviceInstances) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Adding " + serviceInstance.getWorkerIdentity() + " with hostname="
                            + serviceInstance.getHost() + " to list for split locations");
                }
                locations.add(serviceInstance.getHost());
            }
            splitLocationProvider = new HostAffinitySplitLocationProvider(locations);
        } else {
            splitLocationProvider = new SplitLocationProvider() {
                @Override
                public String[] getLocations(InputSplit split) throws IOException {
                    if (split == null) {
                        return null;
                    }
                    String[] locations = split.getLocations();
                    if (locations != null && locations.length == 1) {
                        if ("localhost".equals(locations[0])) {
                            return ArrayUtils.EMPTY_STRING_ARRAY;
                        }
                    }
                    return locations;
                }
            };
        }
        return splitLocationProvider;
    }
}