Uses of Interface org.apache.hadoop.mapred.RecordReader (Hadoop 0.20.2-CDH3B4 API)
Date: 2011-02-21

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## Uses of Interface
org.apache.hadoop.mapred.RecordReader

Packages that use RecordReader
org.apache.hadoop.contrib.index.example |
org.apache.hadoop.examples | Hadoop example code.
org.apache.hadoop.examples.terasort | This package consists of 3 map/reduce applications for Hadoop to compete in the annual terabyte sort competition.
org.apache.hadoop.mapred | A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapred.join | Given a set of sorted datasets keyed with the same class and yielding equal partitions, it is possible to effect a join of those datasets prior to the map.
org.apache.hadoop.mapred.lib | Library of generally useful mappers, reducers, and partitioners.
org.apache.hadoop.mapred.lib.db | org.apache.hadoop.mapred.lib.db Package
org.apache.hadoop.streaming | `Hadoop Streaming` is a utility which allows users to create and run Map-Reduce jobs with any executables (e.g.

Uses of RecordReader in org.apache.hadoop.contrib.index.example

Classes in org.apache.hadoop.contrib.index.example that implement RecordReader
`class` | `LineDocRecordReader` A simple RecordReader for LineDoc for plain text files where each line is a doc.

Methods in org.apache.hadoop.contrib.index.example that return RecordReader
`RecordReader<DocumentID,LineDocTextAndOp>` | `LineDocInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`

Uses of RecordReader in org.apache.hadoop.examples

Methods in org.apache.hadoop.examples that return RecordReader
`RecordReader<IntWritable,IntWritable>` | `SleepJob.SleepInputFormat.getRecordReader(InputSplit ignored, JobConf conf, Reporter reporter)`

Uses of RecordReader in org.apache.hadoop.examples.terasort

Methods in org.apache.hadoop.examples.terasort that return RecordReader
`RecordReader<Text,Text>` | `TeraInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`

Uses of RecordReader in org.apache.hadoop.mapred

Classes in org.apache.hadoop.mapred that implement RecordReader
`class` | `KeyValueLineRecordReader` This class treats a line in the input as a key/value pair separated by a separator character.
`class` | `LineRecordReader` Treats keys as offset in file and value as line.
`static class` | `SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader` Read records from a SequenceFile as binary (raw) bytes.
`class` | `SequenceFileAsTextRecordReader` This class converts the input keys and values to their String forms by calling toString() method.
`class` | `SequenceFileRecordReader<K,V>` An `RecordReader` for `SequenceFile`s.

Methods in org.apache.hadoop.mapred that return RecordReader
`RecordReader<BytesWritable,BytesWritable>` | `SequenceFileAsBinaryInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`
`RecordReader<K,V>` | `SequenceFileInputFilter.getRecordReader(InputSplit split, JobConf job, Reporter reporter)` Create a record reader for the given split
`RecordReader<K,V>` | `SequenceFileInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`
`abstract RecordReader<K,V>` | `MultiFileInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)` Deprecated.
`RecordReader<Text,Text>` | `SequenceFileAsTextInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`
`RecordReader<LongWritable,Text>` | `TextInputFormat.getRecordReader(InputSplit genericSplit, JobConf job, Reporter reporter)`
`RecordReader<Text,Text>` | `KeyValueTextInputFormat.getRecordReader(InputSplit genericSplit, JobConf job, Reporter reporter)`
`RecordReader<K,V>` | `InputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)` Get the `RecordReader` for the given `InputSplit`.
`abstract RecordReader<K,V>` | `FileInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`

Methods in org.apache.hadoop.mapred with parameters of type RecordReader
`void` | `MapRunner.run(RecordReader<K1,V1> input, OutputCollector<K2,V2> output, Reporter reporter)`
`void` | `MapRunnable.run(RecordReader<K1,V1> input, OutputCollector<K2,V2> output, Reporter reporter)` Start mapping input `<key, value>` pairs.

Uses of RecordReader in org.apache.hadoop.mapred.join

Subinterfaces of RecordReader in org.apache.hadoop.mapred.join
`interface` | `ComposableRecordReader<K extends WritableComparable,V extends Writable>` Additional operations required of a RecordReader to participate in a join.

Classes in org.apache.hadoop.mapred.join that implement RecordReader
`class` | `InnerJoinRecordReader<K extends WritableComparable>` Full inner join.
`class` | `JoinRecordReader<K extends WritableComparable>` Base class for Composite joins returning Tuples of arbitrary Writables.
`class` | `MultiFilterRecordReader<K extends WritableComparable,V extends Writable>` Base class for Composite join returning values derived from multiple sources, but generally not tuples.
`class` | `OuterJoinRecordReader<K extends WritableComparable>` Full outer join.
`class` | `OverrideRecordReader<K extends WritableComparable,V extends Writable>` Prefer the "rightmost" data source for this key.
`class` | `WrappedRecordReader<K extends WritableComparable,U extends Writable>` Proxy class for a RecordReader participating in the join framework.

Uses of RecordReader in org.apache.hadoop.mapred.lib

Classes in org.apache.hadoop.mapred.lib that implement RecordReader
`class` | `CombineFileRecordReader<K,V>` A generic RecordReader that can hand out different recordReaders for each chunk in a `CombineFileSplit`.

Fields in org.apache.hadoop.mapred.lib declared as RecordReader
`protected RecordReader<K,V>` | `CombineFileRecordReader.curReader`

Fields in org.apache.hadoop.mapred.lib with type parameters of type RecordReader
`protected Class<RecordReader<K,V>>` | `CombineFileRecordReader.rrClass`
`protected Constructor<RecordReader<K,V>>` | `CombineFileRecordReader.rrConstructor`

Methods in org.apache.hadoop.mapred.lib that return RecordReader
`RecordReader<K,V>` | `DelegatingInputFormat.getRecordReader(InputSplit split, JobConf conf, Reporter reporter)`
`abstract RecordReader<K,V>` | `CombineFileInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)` This is not implemented yet.
`RecordReader<LongWritable,Text>` | `NLineInputFormat.getRecordReader(InputSplit genericSplit, JobConf job, Reporter reporter)`

Methods in org.apache.hadoop.mapred.lib with parameters of type RecordReader
`void` | `MultithreadedMapRunner.run(RecordReader<K1,V1> input, OutputCollector<K2,V2> output, Reporter reporter)`

Constructor parameters in org.apache.hadoop.mapred.lib with type arguments of type RecordReader
`CombineFileRecordReader(JobConf job, CombineFileSplit split, Reporter reporter, Class<RecordReader<K,V>> rrClass)` A generic RecordReader that can hand out different recordReaders for each chunk in the CombineFileSplit.

Uses of RecordReader in org.apache.hadoop.mapred.lib.db

Classes in org.apache.hadoop.mapred.lib.db that implement RecordReader
`protected class` | `DBInputFormat.DBRecordReader` Deprecated. A RecordReader that reads records from a SQL table.

Methods in org.apache.hadoop.mapred.lib.db that return RecordReader
`RecordReader<LongWritable,T>` | `DBInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)` Deprecated. Get the `RecordReader` for the given `InputSplit`.

Uses of RecordReader in org.apache.hadoop.streaming

Classes in org.apache.hadoop.streaming that implement RecordReader
`class` | `StreamBaseRecordReader` Shared functionality for hadoopStreaming formats.
`class` | `StreamXmlRecordReader` A way to interpret XML fragments as Mapper input records.

Methods in org.apache.hadoop.streaming that return RecordReader
`RecordReader` | `AutoInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)`
`RecordReader<Text,Text>` | `StreamInputFormat.getRecordReader(InputSplit genericSplit, JobConf job, Reporter reporter)`

Methods in org.apache.hadoop.streaming with parameters of type RecordReader
`void` | `PipeMapRunner.run(RecordReader<K1,V1> input, OutputCollector<K2,V2> output, Reporter reporter)`

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