Package org.apache.hadoop.io

Class SetFile.Writer

java.lang.Object

org.apache.hadoop.io.MapFile.Writer

org.apache.hadoop.io.SetFile.Writer

All Implemented Interfaces:

Closeable, AutoCloseable

Enclosing class:

SetFile

public static class SetFile.Writer
extends MapFile.Writer

Write a new set file.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.io.MapFile.Writer

MapFile.Writer.Option

Constructor Summary

Constructors

Constructor	Description
Writer(Configuration conf, FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass, SequenceFile.CompressionType compress)	Create a set naming the element class and compression type.
Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, SequenceFile.CompressionType compress)	Create a set naming the element comparator and compression type.
Writer(FileSystem fs, String dirName, Class<? extends WritableComparable> keyClass)	Deprecated. pass a Configuration too

Method Summary

Modifier and Type	Method	Description
void	append(WritableComparable key)	Append a key to a set.

Methods inherited from class org.apache.hadoop.io.MapFile.Writer

append, close, comparator, compression, compression, getIndexInterval, keyClass, progressable, setIndexInterval, setIndexInterval, valueClass

Methods inherited from class java.lang.Object

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

Constructor Details

Writer

public Writer(FileSystem fs,
 String dirName,
 Class<? extends WritableComparable> keyClass)
       throws IOException

Deprecated.

pass a Configuration too

Create the named set for keys of the named class.

Parameters:

fs - input FileSystem.

dirName - input dirName.

keyClass - input keyClass.

Throws:

IOException - raised on errors performing I/O.

Writer

public Writer(Configuration conf,
 FileSystem fs,
 String dirName,
 Class<? extends WritableComparable> keyClass,
 SequenceFile.CompressionType compress)
       throws IOException

Create a set naming the element class and compression type.

Parameters:

conf - input Configuration.

fs - input FileSystem.

dirName - input dirName.

keyClass - input keyClass.

compress - input compress.

Throws:

IOException - raised on errors performing I/O.

Writer

public Writer(Configuration conf,
 FileSystem fs,
 String dirName,
 WritableComparator comparator,
 SequenceFile.CompressionType compress)
       throws IOException

Create a set naming the element comparator and compression type.

Parameters:

conf - input Configuration.

fs - input FileSystem.

dirName - input dirName.

comparator - input comparator.

compress - input compress.

Throws:

IOException - raised on errors performing I/O.

Method Details

append

public void append(WritableComparable key)
            throws IOException

Append a key to a set. The key must be strictly greater than the previous key added to the set.

Parameters:

key - input key.

Throws:

IOException - raised on errors performing I/O.