org.apache.hadoop.hbase.mapreduce

Class HFileInputFormat

java.lang.Object

org.apache.hadoop.mapreduce.InputFormat<K,V>

org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,Cell>

org.apache.hadoop.hbase.mapreduce.HFileInputFormat

@InterfaceAudience.Private
public class HFileInputFormat
extends org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,Cell>

Simple MR input format for HFiles. This code was borrowed from Apache Crunch project. Updated to the recent version of HBase.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	HFileInputFormat.HFileRecordReader Record reader for HFiles.

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

org.apache.hadoop.mapreduce.lib.input.FileInputFormat.Counter

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static org.apache.hadoop.fs.PathFilter	HIDDEN_FILE_FILTER File filter that removes all "hidden" files.
private static org.slf4j.Logger	LOG

Fields inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

DEFAULT_LIST_STATUS_NUM_THREADS, INPUT_DIR, INPUT_DIR_RECURSIVE, LIST_STATUS_NUM_THREADS, NUM_INPUT_FILES, PATHFILTER_CLASS, SPLIT_MAXSIZE, SPLIT_MINSIZE

Constructor Summary

Constructors

Constructor and Description
HFileInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,Cell>	createRecordReader(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
protected boolean	isSplitable(org.apache.hadoop.mapreduce.JobContext context, org.apache.hadoop.fs.Path filename)
protected List<org.apache.hadoop.fs.FileStatus>	listStatus(org.apache.hadoop.mapreduce.JobContext job)

Methods inherited from class org.apache.hadoop.mapreduce.lib.input.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getFormatMinSplitSize, getInputDirRecursive, getInputPathFilter, getInputPaths, getMaxSplitSize, getMinSplitSize, getSplits, makeSplit, makeSplit, setInputDirRecursive, setInputPathFilter, setInputPaths, setInputPaths, setMaxInputSplitSize, setMinInputSplitSize

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

private static final org.slf4j.Logger LOG

HIDDEN_FILE_FILTER

static final org.apache.hadoop.fs.PathFilter HIDDEN_FILE_FILTER

File filter that removes all "hidden" files. This might be something worth removing from a more general purpose utility; it accounts for the presence of metadata files created in the way we're doing exports.

Constructor Detail

HFileInputFormat

public HFileInputFormat()

Method Detail

listStatus

protected List<org.apache.hadoop.fs.FileStatus> listStatus(org.apache.hadoop.mapreduce.JobContext job)
                                                    throws IOException

Overrides:

listStatus in class org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,Cell>

Throws:

IOException

createRecordReader

public org.apache.hadoop.mapreduce.RecordReader<org.apache.hadoop.io.NullWritable,Cell> createRecordReader(org.apache.hadoop.mapreduce.InputSplit split,
                                                                                                           org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                                    throws IOException,
                                                                                                           InterruptedException

Specified by:

createRecordReader in class org.apache.hadoop.mapreduce.InputFormat<org.apache.hadoop.io.NullWritable,Cell>

Throws:

IOException

InterruptedException

isSplitable

protected boolean isSplitable(org.apache.hadoop.mapreduce.JobContext context,
                              org.apache.hadoop.fs.Path filename)

Overrides:

isSplitable in class org.apache.hadoop.mapreduce.lib.input.FileInputFormat<org.apache.hadoop.io.NullWritable,Cell>