com.metamx.druid.indexer.path.GranularityPathSpec.java Source code

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Here is the source code for com.metamx.druid.indexer.path.GranularityPathSpec.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid.indexer.path;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Sets;
import com.metamx.common.Granularity;
import com.metamx.common.guava.Comparators;
import com.metamx.common.logger.Logger;
import com.metamx.druid.indexer.HadoopDruidIndexerConfig;
import com.metamx.druid.indexer.hadoop.FSSpideringIterator;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;

import org.joda.time.DateTime;
import org.joda.time.Interval;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import java.io.IOException;
import java.util.Set;
import java.util.regex.Pattern;

/**
 */
public class GranularityPathSpec implements PathSpec {
    private static final Logger log = new Logger(GranularityPathSpec.class);

    private String inputPath;
    private String filePattern;
    private Granularity dataGranularity;
    private String pathFormat;

    @JsonProperty
    public String getInputPath() {
        return inputPath;
    }

    public void setInputPath(String inputPath) {
        this.inputPath = inputPath;
    }

    @JsonProperty
    public String getFilePattern() {
        return filePattern;
    }

    public void setFilePattern(String filePattern) {
        this.filePattern = filePattern;
    }

    @JsonProperty
    public Granularity getDataGranularity() {
        return dataGranularity;
    }

    public void setDataGranularity(Granularity dataGranularity) {
        this.dataGranularity = dataGranularity;
    }

    @JsonProperty
    public String getPathFormat() {
        return pathFormat;
    }

    public void setPathFormat(String pathFormat) {
        this.pathFormat = pathFormat;
    }

    @Override
    public Job addInputPaths(HadoopDruidIndexerConfig config, Job job) throws IOException {
        final Set<Interval> intervals = Sets.newTreeSet(Comparators.intervals());
        for (Interval segmentInterval : config.getSegmentGranularIntervals()) {
            for (Interval dataInterval : dataGranularity.getIterable(segmentInterval)) {
                intervals.add(dataInterval);
            }
        }

        Path betaInput = new Path(inputPath);
        FileSystem fs = betaInput.getFileSystem(job.getConfiguration());
        Set<String> paths = Sets.newTreeSet();
        Pattern fileMatcher = Pattern.compile(filePattern);

        DateTimeFormatter customFormatter = null;
        if (pathFormat != null) {
            customFormatter = DateTimeFormat.forPattern(pathFormat);
        }

        for (Interval interval : intervals) {
            DateTime t = interval.getStart();
            String intervalPath = null;
            if (customFormatter != null) {
                intervalPath = customFormatter.print(t);
            } else {
                intervalPath = dataGranularity.toPath(t);
            }

            Path granularPath = new Path(betaInput, intervalPath);
            log.info("Checking path[%s]", granularPath);
            for (FileStatus status : FSSpideringIterator.spiderIterable(fs, granularPath)) {
                final Path filePath = status.getPath();
                if (fileMatcher.matcher(filePath.toString()).matches()) {
                    paths.add(filePath.toString());
                }
            }
        }

        for (String path : paths) {
            log.info("Appending path[%s]", path);
            FileInputFormat.addInputPath(job, new Path(path));
        }

        return job;
    }
}