com.twitter.scalding.parquet.scrooge.ParquetScroogeScheme.java Source code

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Here is the source code for com.twitter.scalding.parquet.scrooge.ParquetScroogeScheme.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.twitter.scalding.parquet.scrooge;

import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.RecordReader;

import com.twitter.scalding.parquet.ParquetValueScheme;
import com.twitter.scrooge.ThriftStruct;

import cascading.flow.FlowProcess;
import cascading.tap.Tap;
import org.apache.parquet.filter2.predicate.FilterPredicate;
import org.apache.parquet.hadoop.ParquetInputFormat;
import org.apache.parquet.hadoop.ParquetOutputFormat;
import org.apache.parquet.hadoop.mapred.DeprecatedParquetInputFormat;
import org.apache.parquet.hadoop.mapred.DeprecatedParquetOutputFormat;
import org.apache.parquet.hadoop.thrift.ThriftReadSupport;

public class ParquetScroogeScheme<T extends ThriftStruct> extends ParquetValueScheme<T> {

    private static final long serialVersionUID = -8332274507341448397L;

    public ParquetScroogeScheme(Class<T> klass) {
        this(new ParquetValueScheme.Config<T>().withRecordClass(klass));
    }

    public ParquetScroogeScheme(FilterPredicate filterPredicate, Class<T> klass) {
        this(new ParquetValueScheme.Config<T>().withFilterPredicate(filterPredicate).withRecordClass(klass));
    }

    public ParquetScroogeScheme(ParquetValueScheme.Config<T> config) {
        super(config);
    }

    @Override
    public void sinkConfInit(FlowProcess<JobConf> fp, Tap<JobConf, RecordReader, OutputCollector> tap,
            JobConf jobConf) {
        DeprecatedParquetOutputFormat.setAsOutputFormat(jobConf);
        ParquetOutputFormat.setWriteSupportClass(jobConf, ScroogeWriteSupport.class);
        ScroogeWriteSupport.setScroogeClass(jobConf, this.config.getKlass());
    }

    @Override
    public void sourceConfInit(FlowProcess<JobConf> fp, Tap<JobConf, RecordReader, OutputCollector> tap,
            JobConf jobConf) {
        super.sourceConfInit(fp, tap, jobConf);
        jobConf.setInputFormat(DeprecatedParquetInputFormat.class);
        ParquetInputFormat.setReadSupportClass(jobConf, ScroogeReadSupport.class);
        ThriftReadSupport.setRecordConverterClass(jobConf, ScroogeRecordConverter.class);
    }
}