org.apache.druid.indexer.path.StaticPathSpec.java Source code

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Here is the source code for org.apache.druid.indexer.path.StaticPathSpec.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 org.apache.druid.indexer.path;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
import org.apache.druid.indexer.HadoopDruidIndexerConfig;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.druid.java.util.common.logger.Logger;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.InputFormat;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.CombineTextInputFormat;
import org.apache.hadoop.mapreduce.lib.input.MultipleInputs;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;

import java.util.Set;

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

    private final String paths;
    private final Class<? extends InputFormat> inputFormat;

    @JsonCreator
    public StaticPathSpec(@JsonProperty("paths") String paths,
            @JsonProperty("inputFormat") Class<? extends InputFormat> inputFormat) {
        this.paths = paths;
        this.inputFormat = inputFormat;
    }

    @Override
    public Job addInputPaths(HadoopDruidIndexerConfig config, Job job) {
        log.info("Adding paths[%s]", paths);

        addToMultipleInputs(config, job, paths, inputFormat);

        return job;
    }

    @JsonProperty
    public Class<? extends InputFormat> getInputFormat() {
        return inputFormat;
    }

    @JsonProperty
    public String getPaths() {
        return paths;
    }

    public static void addToMultipleInputs(HadoopDruidIndexerConfig config, Job job, String path,
            Class<? extends InputFormat> inputFormatClass) {
        if (path != null) {
            addToMultipleInputs(config, job, ImmutableSet.of(path), inputFormatClass);
        }
    }

    public static void addToMultipleInputs(HadoopDruidIndexerConfig config, Job job, Set<String> paths,
            Class<? extends InputFormat> inputFormatClass) {
        if (paths == null || paths.isEmpty()) {
            return;
        }

        Class<? extends InputFormat> inputFormatClassToUse = inputFormatClass;
        if (inputFormatClassToUse == null) {
            if (config.isCombineText()) {
                inputFormatClassToUse = CombineTextInputFormat.class;
            } else {
                inputFormatClassToUse = TextInputFormat.class;
            }
        }

        // Due to https://issues.apache.org/jira/browse/MAPREDUCE-5061 we can't directly do
        // MultipleInputs.addInputPath(job, path, inputFormatClassToUse)
        // but have to handle hadoop glob path ourselves correctly
        // This change and HadoopGlobPathSplitter.java can be removed once the hadoop issue is fixed
        Set<String> pathStrings = Sets.newLinkedHashSet();
        for (String path : paths) {
            Iterables.addAll(pathStrings, HadoopGlobPathSplitter.splitGlob(path));
        }
        if (!pathStrings.isEmpty()) {
            addInputPath(job, pathStrings, inputFormatClassToUse);
        }
    }

    // copied from MultipleInputs.addInputPath with slight modifications
    private static void addInputPath(Job job, Iterable<String> pathStrings,
            Class<? extends InputFormat> inputFormatClass) {
        Configuration conf = job.getConfiguration();
        StringBuilder inputFormats = new StringBuilder(
                StringUtils.nullToEmptyNonDruidDataString(conf.get(MultipleInputs.DIR_FORMATS)));

        String[] paths = Iterables.toArray(pathStrings, String.class);
        for (int i = 0; i < paths.length - 1; i++) {
            if (inputFormats.length() > 0) {
                inputFormats.append(',');
            }
            inputFormats.append(paths[i]).append(';').append(inputFormatClass.getName());
        }
        if (inputFormats.length() > 0) {
            conf.set(MultipleInputs.DIR_FORMATS, inputFormats.toString());
        }
        // add last one separately for possible initialization in MultipleInputs
        MultipleInputs.addInputPath(job, new Path(paths[paths.length - 1]), inputFormatClass);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        StaticPathSpec that = (StaticPathSpec) o;

        if (paths != null ? !paths.equals(that.paths) : that.paths != null) {
            return false;
        }
        return !(inputFormat != null ? !inputFormat.equals(that.inputFormat) : that.inputFormat != null);

    }

    @Override
    public int hashCode() {
        int result = paths != null ? paths.hashCode() : 0;
        result = 31 * result + (inputFormat != null ? inputFormat.hashCode() : 0);
        return result;
    }
}