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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.hive;
import java.util.Map;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.metastore.HiveMetaHook;
import org.apache.hadoop.hive.ql.metadata.DefaultStorageHandler;
import org.apache.hadoop.hive.ql.plan.TableDesc;
import org.apache.hadoop.hive.serde2.SerDe;
import org.apache.hadoop.mapred.InputFormat;
import org.apache.hadoop.mapred.OutputFormat;
import org.elasticsearch.hadoop.cfg.Settings;
import org.elasticsearch.hadoop.cfg.HadoopSettingsManager;
import org.elasticsearch.hadoop.mr.EsOutputFormat;
import org.elasticsearch.hadoop.mr.HadoopCfgUtils;
import org.elasticsearch.hadoop.util.Assert;
import static org.elasticsearch.hadoop.hive.HiveConstants.*;
/**
* Hive storage for writing data into an ElasticSearch index.
*
* The ElasticSearch host/port can be specified through Hadoop properties (see package description)
* or passed to {@link #EsStorageHandler} through Hive <tt>TBLPROPERTIES</tt>
*/
@SuppressWarnings({ "deprecation", "rawtypes" })
public class EsStorageHandler extends DefaultStorageHandler {
private static Log log = LogFactory.getLog(EsStorageHandler.class);
@Override
public Class<? extends InputFormat> getInputFormatClass() {
return EsHiveInputFormat.class;
}
@Override
public Class<? extends OutputFormat> getOutputFormatClass() {
return EsHiveOutputFormat.class;
}
@Override
public Class<? extends SerDe> getSerDeClass() {
return EsSerDe.class;
}
@Override
public HiveMetaHook getMetaHook() {
//TODO: add metahook support
return null;
}
@Override
public void configureInputJobProperties(TableDesc tableDesc, Map<String, String> jobProperties) {
init(tableDesc, true);
copyToJobProperties(jobProperties, tableDesc.getProperties());
}
@Override
public void configureOutputJobProperties(TableDesc tableDesc, Map<String, String> jobProperties) {
init(tableDesc, false);
copyToJobProperties(jobProperties, tableDesc.getProperties());
}
// NB: save the table properties in a special place but nothing else; otherwise the settings might trip on each other
private void init(TableDesc tableDesc, boolean read) {
Configuration cfg = getConf();
// NB: we can't just merge the table properties in, we need to save them per input/output otherwise clashes occur which confuse Hive
Settings settings = HadoopSettingsManager.loadFrom(cfg);
//settings.setProperty((read ? HiveConstants.INPUT_TBL_PROPERTIES : HiveConstants.OUTPUT_TBL_PROPERTIES), IOUtils.propsToString(tableDesc.getProperties()));
if (read) {
// no generic setting
}
else {
// replace the default committer when using the old API
HadoopCfgUtils.setOutputCommitterClass(cfg, EsOutputFormat.EsOutputCommitter.class.getName());
}
Assert.hasText(tableDesc.getProperties().getProperty(TABLE_LOCATION), String.format(
"no table location [%s] declared by Hive resulting in abnormal execution;", TABLE_LOCATION));
}
private void copyToJobProperties(Map<String, String> jobProperties, Properties properties) {
for (String key : properties.stringPropertyNames()) {
jobProperties.put(key, properties.getProperty(key));
}
}
@Override
@Deprecated
public void configureTableJobProperties(TableDesc tableDesc, Map<String, String> jobProperties) {
throw new UnsupportedOperationException();
}
}