org.apache.sqoop.hive.HiveConfig.java Source code

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Here is the source code for org.apache.sqoop.hive.HiveConfig.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
 *
 *     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.sqoop.hive;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;

import java.io.IOException;
import java.util.Map;

public class HiveConfig {

    public static final Log LOG = LogFactory.getLog(HiveConfig.class.getName());

    public static final String HIVE_CONF_CLASS = "org.apache.hadoop.hive.conf.HiveConf";

    public static final String HIVE_SASL_ENABLED = "hive.metastore.sasl.enabled";

    /**
     * Dynamically create hive configuration object.
     * @param conf
     * @return
     * @throws IOException if instantiate HiveConf failed.
     */
    public static Configuration getHiveConf(Configuration conf) throws IOException {
        try {
            Class HiveConfClass = Class.forName(HIVE_CONF_CLASS);
            return ((Configuration) (HiveConfClass.getConstructor(Configuration.class, Class.class)
                    .newInstance(conf, Configuration.class)));
        } catch (ClassNotFoundException ex) {
            LOG.error("Could not load " + HIVE_CONF_CLASS + ". Make sure HIVE_CONF_DIR is set correctly.");
            throw new IOException(ex);
        } catch (Exception ex) {
            LOG.error("Could not instantiate HiveConf instance.", ex);
            throw new IOException(ex);
        }
    }

    /**
     * Add hive conf to configuration object without overriding already set properties.
     * @param hiveConf
     * @param conf
     */
    public static void addHiveConfigs(Configuration hiveConf, Configuration conf) {
        for (Map.Entry<String, String> item : hiveConf) {
            conf.setIfUnset(item.getKey(), item.getValue());
        }
    }
}