com.uber.hoodie.common.HoodieMergeOnReadTestUtils.java Source code

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Here is the source code for com.uber.hoodie.common.HoodieMergeOnReadTestUtils.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 com.uber.hoodie.common;

import static com.uber.hoodie.common.HoodieTestDataGenerator.TRIP_EXAMPLE_SCHEMA;

import com.uber.hoodie.common.model.HoodieTestUtils;
import com.uber.hoodie.common.util.HoodieAvroUtils;
import com.uber.hoodie.hadoop.realtime.HoodieRealtimeInputFormat;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericRecord;
import org.apache.avro.generic.GenericRecordBuilder;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.serde2.ColumnProjectionUtils;
import org.apache.hadoop.io.ArrayWritable;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.InputSplit;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordReader;

/**
 * Utility methods to aid in testing MergeOnRead (workaround for HoodieReadClient for MOR)
 */
public class HoodieMergeOnReadTestUtils {

    public static List<GenericRecord> getRecordsUsingInputFormat(List<String> inputPaths, String basePath)
            throws IOException {
        JobConf jobConf = new JobConf();
        Schema schema = HoodieAvroUtils.addMetadataFields(Schema.parse(TRIP_EXAMPLE_SCHEMA));
        HoodieRealtimeInputFormat inputFormat = new HoodieRealtimeInputFormat();
        setPropsForInputFormat(inputFormat, jobConf, schema, basePath);
        return inputPaths.stream().map(path -> {
            setInputPath(jobConf, path);
            List<GenericRecord> records = new ArrayList<>();
            try {
                List<InputSplit> splits = Arrays.asList(inputFormat.getSplits(jobConf, 1));
                RecordReader recordReader = inputFormat.getRecordReader(splits.get(0), jobConf, null);
                Void key = (Void) recordReader.createKey();
                ArrayWritable writable = (ArrayWritable) recordReader.createValue();
                while (recordReader.next(key, writable)) {
                    GenericRecordBuilder newRecord = new GenericRecordBuilder(schema);
                    // writable returns an array with [field1, field2, _hoodie_commit_time,
                    // _hoodie_commit_seqno]
                    Writable[] values = writable.get();
                    schema.getFields().forEach(field -> {
                        newRecord.set(field, values[2]);
                    });
                    records.add(newRecord.build());
                }
            } catch (IOException ie) {
                ie.printStackTrace();
            }
            return records;
        }).reduce((a, b) -> {
            a.addAll(b);
            return a;
        }).get();
    }

    private static void setPropsForInputFormat(HoodieRealtimeInputFormat inputFormat, JobConf jobConf,
            Schema schema, String basePath) {
        List<Schema.Field> fields = schema.getFields();
        String names = fields.stream().map(f -> f.name().toString()).collect(Collectors.joining(","));
        String postions = fields.stream().map(f -> String.valueOf(f.pos())).collect(Collectors.joining(","));
        Configuration conf = HoodieTestUtils.getDefaultHadoopConf();
        jobConf.set(ColumnProjectionUtils.READ_COLUMN_NAMES_CONF_STR, names);
        jobConf.set(ColumnProjectionUtils.READ_COLUMN_IDS_CONF_STR, postions);
        jobConf.set("partition_columns", "datestr");
        conf.set(ColumnProjectionUtils.READ_COLUMN_NAMES_CONF_STR, names);
        conf.set(ColumnProjectionUtils.READ_COLUMN_IDS_CONF_STR, postions);
        conf.set("partition_columns", "datestr");
        inputFormat.setConf(conf);
        jobConf.addResource(conf);
    }

    private static void setInputPath(JobConf jobConf, String inputPath) {
        jobConf.set("mapreduce.input.fileinputformat.inputdir", inputPath);
        jobConf.set("mapreduce.input.fileinputformat.inputdir", inputPath);
        jobConf.set("map.input.dir", inputPath);
    }
}