com.uber.hoodie.hive.SlashEncodedDayPartitionValueExtractor Maven / Gradle / Ivy
/*
* Copyright (c) 2017 Uber Technologies, Inc. ([email protected])
*
* Licensed 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 com.uber.hoodie.hive;
import com.beust.jcommander.internal.Lists;
import java.util.List;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
/**
* HDFS Path contain hive partition values for the keys it is partitioned on. This mapping is not
* straight forward and requires a pluggable implementation to extract the partition value from HDFS
* path.
*
* This implementation extracts datestr=yyyy-mm-dd from path of type /yyyy/mm/dd
*/
public class SlashEncodedDayPartitionValueExtractor implements PartitionValueExtractor {
private transient DateTimeFormatter dtfOut;
public SlashEncodedDayPartitionValueExtractor() {
this.dtfOut = DateTimeFormat.forPattern("yyyy-MM-dd");
}
private DateTimeFormatter getDtfOut() {
if (dtfOut == null) {
dtfOut = DateTimeFormat.forPattern("yyyy-MM-dd");
}
return dtfOut;
}
@Override
public List extractPartitionValuesInPath(String partitionPath) {
// partition path is expected to be in this format yyyy/mm/dd
String[] splits = partitionPath.split("/");
if (splits.length != 3) {
throw new IllegalArgumentException(
"Partition path " + partitionPath + " is not in the form yyyy/mm/dd ");
}
// Get the partition part and remove the / as well at the end
int year = Integer.parseInt(splits[0]);
int mm = Integer.parseInt(splits[1]);
int dd = Integer.parseInt(splits[2]);
DateTime dateTime = new DateTime(year, mm, dd, 0, 0);
return Lists.newArrayList(getDtfOut().print(dateTime));
}
}