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From rmetzger <...@git.apache.org>
Subject [GitHub] incubator-flink pull request: The Hadoop Compatibility has been re...
Date Fri, 20 Jun 2014 19:26:43 GMT
Github user rmetzger commented on a diff in the pull request:

    https://github.com/apache/incubator-flink/pull/32#discussion_r14037351
  
    --- Diff: stratosphere-addons/hadoop-compatibility/src/main/java/eu/stratosphere/hadoopcompatibility/mapreduce/HadoopInputFormat.java
---
    @@ -0,0 +1,337 @@
    +/***********************************************************************************************************************
    + * Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
    + *
    + * 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
    + *
    + * 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 eu.stratosphere.hadoopcompatibility.mapreduce;
    +
    +import java.io.IOException;
    +import java.io.ObjectInputStream;
    +import java.io.ObjectOutputStream;
    +import java.util.ArrayList;
    +import java.util.List;
    +
    +import org.apache.commons.logging.Log;
    +import org.apache.commons.logging.LogFactory;
    +import org.apache.hadoop.io.Writable;
    +import org.apache.hadoop.mapreduce.Job;
    +import org.apache.hadoop.mapreduce.JobContext;
    +import org.apache.hadoop.mapreduce.JobID;
    +import org.apache.hadoop.mapreduce.RecordReader;
    +import org.apache.hadoop.mapreduce.TaskAttemptContext;
    +import org.apache.hadoop.mapreduce.TaskAttemptID;
    +import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
    +
    +import eu.stratosphere.api.common.io.FileInputFormat.FileBaseStatistics;
    +import eu.stratosphere.api.common.io.InputFormat;
    +import eu.stratosphere.api.common.io.statistics.BaseStatistics;
    +import eu.stratosphere.api.java.tuple.Tuple2;
    +import eu.stratosphere.api.java.typeutils.ResultTypeQueryable;
    +import eu.stratosphere.api.java.typeutils.TupleTypeInfo;
    +import eu.stratosphere.api.java.typeutils.WritableTypeInfo;
    +import eu.stratosphere.configuration.Configuration;
    +import eu.stratosphere.core.fs.FileStatus;
    +import eu.stratosphere.core.fs.FileSystem;
    +import eu.stratosphere.core.fs.Path;
    +import eu.stratosphere.hadoopcompatibility.mapreduce.utils.HadoopUtils;
    +import eu.stratosphere.hadoopcompatibility.mapreduce.wrapper.HadoopInputSplit;
    +import eu.stratosphere.types.TypeInformation;
    +
    +public class HadoopInputFormat<K extends Writable, V extends Writable> implements
InputFormat<Tuple2<K,V>, HadoopInputSplit>, ResultTypeQueryable<Tuple2<K,V>>
{
    +	
    +	private static final long serialVersionUID = 1L;
    +	
    +	private static final Log LOG = LogFactory.getLog(HadoopInputFormat.class);
    +	
    +	private org.apache.hadoop.mapreduce.InputFormat<K, V> mapreduceInputFormat;
    +	private Class<K> keyClass;
    +	private Class<V> valueClass;
    +	private org.apache.hadoop.conf.Configuration configuration;
    +	
    +	public transient RecordReader<K, V> recordReader;
    +	private boolean fetched = false;
    +	private boolean hasNext;
    +	
    +	public HadoopInputFormat() {
    +		super();
    +	}
    +	
    +	public HadoopInputFormat(org.apache.hadoop.mapreduce.InputFormat<K,V> mapreduceInputFormat,
Class<K> key, Class<V> value, Job job) {
    +		super();
    +		this.mapreduceInputFormat = mapreduceInputFormat;
    +		this.keyClass = key;
    +		this.valueClass = value;
    +		this.configuration = job.getConfiguration();
    +		HadoopUtils.mergeHadoopConf(configuration);
    +	}
    +	
    +	public void setConfiguration(org.apache.hadoop.conf.Configuration configuration) {
    +		this.configuration = configuration;
    +	}
    +	
    +	public org.apache.hadoop.mapreduce.InputFormat<K,V> getHadoopInputFormat() {
    +		return this.mapreduceInputFormat;
    +	}
    +	
    +	public void setHadoopInputFormat(org.apache.hadoop.mapreduce.InputFormat<K,V>
mapreduceInputFormat) {
    +		this.mapreduceInputFormat = mapreduceInputFormat;
    +	}
    +	
    +	public org.apache.hadoop.conf.Configuration getConfiguration() {
    +		return this.configuration;
    +	}
    +	
    +	// --------------------------------------------------------------------------------------------
    +	//  InputFormat
    +	// --------------------------------------------------------------------------------------------
    +	
    +	@Override
    +	public void configure(Configuration parameters) {
    +		// nothing to do
    +	}
    +	
    +	@Override
    +	public BaseStatistics getStatistics(BaseStatistics cachedStats) throws IOException {
    +		// only gather base statistics for FileInputFormats
    +		if(!(mapreduceInputFormat instanceof FileInputFormat)) {
    +			return null;
    +		}
    +		
    +		JobContext jobContext = null;
    +		try {
    +			jobContext = HadoopUtils.instantiateJobContext(configuration, null);
    +		}
    +		catch (Exception e) {
    +			throw new RuntimeException(e);
    +		}
    +		
    +		final FileBaseStatistics cachedFileStats = (cachedStats != null && cachedStats
instanceof FileBaseStatistics) ?
    +				(FileBaseStatistics) cachedStats : null;
    +				
    +				try {
    +					final org.apache.hadoop.fs.Path[] paths = FileInputFormat.getInputPaths(jobContext);
    +					
    +					return getFileStats(cachedFileStats, paths, new ArrayList<FileStatus>(1));
    +				} catch (IOException ioex) {
    +					if (LOG.isWarnEnabled()) {
    +						LOG.warn("Could not determine statistics due to an io error: "
    +								+ ioex.getMessage());
    +					}
    +				}
    +				catch (Throwable t) {
    +					if (LOG.isErrorEnabled()) {
    --- End diff --
    
    copy pasted typo


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