com.hadoop.mapred

Class DeprecatedLzoTextInputFormat

java.lang.Object

org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>

org.apache.hadoop.mapred.TextInputFormat

com.hadoop.mapred.DeprecatedLzoTextInputFormat

All Implemented Interfaces:

org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>, org.apache.hadoop.mapred.JobConfigurable

public class DeprecatedLzoTextInputFormat
extends org.apache.hadoop.mapred.TextInputFormat

This class conforms to the old (org.apache.hadoop.mapred.*) hadoop API style which is deprecated but still required in places. Streaming, for example, does a check that the given input format is a descendant of org.apache.hadoop.mapred.InputFormat, which any InputFormat-derived class from the new API fails. In order for streaming to work, you must use com.hadoop.mapred.DeprecatedLzoTextInputFormat, not com.hadoop.mapreduce.LzoTextInputFormat. The classes attempt to be alike in every other respect.

Note that to use this input format properly with hadoop-streaming, you should also set the property stream.map.input.ignoreKey=true. That will replicate the behavior of the default TextInputFormat by stripping off the byte offset keys from the input lines that get piped to the mapper process.

See LzoInputFormatCommon for a description of the boolean property lzo.text.input.format.ignore.nonlzo and how it affects the behavior of this input format.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapred.FileInputFormat

org.apache.hadoop.mapred.FileInputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapred.FileInputFormat

INPUT_DIR_RECURSIVE, LOG, NUM_INPUT_FILES

Constructor Summary

Constructors

Constructor and Description
DeprecatedLzoTextInputFormat()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>	getRecordReader(org.apache.hadoop.mapred.InputSplit split, org.apache.hadoop.mapred.JobConf conf, org.apache.hadoop.mapred.Reporter reporter)
org.apache.hadoop.mapred.InputSplit[]	getSplits(org.apache.hadoop.mapred.JobConf conf, int numSplits)
protected boolean	isSplitable(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path filename)
protected org.apache.hadoop.fs.FileStatus[]	listStatus(org.apache.hadoop.mapred.JobConf conf)

Methods inherited from class org.apache.hadoop.mapred.TextInputFormat

configure

Methods inherited from class org.apache.hadoop.mapred.FileInputFormat

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, makeSplit, makeSplit, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

DeprecatedLzoTextInputFormat

public DeprecatedLzoTextInputFormat()

Method Detail

listStatus

protected org.apache.hadoop.fs.FileStatus[] listStatus(org.apache.hadoop.mapred.JobConf conf)
                                                throws IOException

Overrides:

listStatus in class org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>

Throws:

IOException

isSplitable

protected boolean isSplitable(org.apache.hadoop.fs.FileSystem fs,
                              org.apache.hadoop.fs.Path filename)

Overrides:

isSplitable in class org.apache.hadoop.mapred.TextInputFormat

getSplits

public org.apache.hadoop.mapred.InputSplit[] getSplits(org.apache.hadoop.mapred.JobConf conf,
                                                       int numSplits)
                                                throws IOException

Specified by:

getSplits in interface org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>

Overrides:

getSplits in class org.apache.hadoop.mapred.FileInputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>

Throws:

IOException

getRecordReader

public org.apache.hadoop.mapred.RecordReader<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text> getRecordReader(org.apache.hadoop.mapred.InputSplit split,
                                                                                                                          org.apache.hadoop.mapred.JobConf conf,
                                                                                                                          org.apache.hadoop.mapred.Reporter reporter)
                                                                                                                   throws IOException

Specified by:

getRecordReader in interface org.apache.hadoop.mapred.InputFormat<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text>

Overrides:

getRecordReader in class org.apache.hadoop.mapred.TextInputFormat

Throws:

IOException