org.pentaho.hadoop.shim.mapr31.MapR3DistributedCacheUtilImpl.java Source code

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/*******************************************************************************
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* Pentaho Big Data
*
* Copyright (C) 2002-2014 by Pentaho : http://www.pentaho.com
*
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*
* 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
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.pentaho.hadoop.shim.mapr31;

import java.io.IOException;
import java.net.URI;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.filecache.DistributedCache;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.pentaho.hadoop.shim.HadoopConfiguration;
import org.pentaho.hadoop.shim.common.DistributedCacheUtilImpl;

public class MapR3DistributedCacheUtilImpl extends DistributedCacheUtilImpl {

    public MapR3DistributedCacheUtilImpl(HadoopConfiguration configuration) {
        super(configuration);
    }

    /**
     * Add an file path to the current set of classpath entries. It adds the file
     * to cache as well.
     *
     * This is copied from Hadoop 0.20.2 o.a.h.filecache.DistributedCache so we can inject the correct path separator
     * for the environment the cluster is executing in. See {@link #getClusterPathSeparator()}.
     *
     * @param file Path of the file to be added
     * @param conf Configuration that contains the classpath setting
     */
    @Override
    public void addFileToClassPath(Path file, Configuration conf) throws IOException {

        String classpath = conf.get("mapred.job.classpath.files");
        conf.set("mapred.job.classpath.files",
                classpath == null ? file.toString() : classpath + getClusterPathSeparator() + file.toString());
        FileSystem fs = FileSystem.get(conf);
        URI uri = fs.makeQualified(file).toUri();

        DistributedCache.addCacheFile(uri, conf);
    }
}