org.apache.hadoop.io
Class SetFile.Writer

java.lang.Object
  org.apache.hadoop.io.MapFile.Writer
      org.apache.hadoop.io.SetFile.Writer

Enclosing class:

SetFile

public static class SetFile.Writer
extends MapFile.Writer

Write a new set file.

Constructor Summary

SetFile.Writer(Configuration conf, FileSystem fs, String dirName, Class keyClass, SequenceFile.CompressionType compress)
Create a set naming the element class and compression type.

SetFile.Writer(Configuration conf, FileSystem fs, String dirName, WritableComparator comparator, SequenceFile.CompressionType compress)
Create a set naming the element comparator and compression type.

SetFile.Writer(FileSystem fs, String dirName, Class keyClass)
Deprecated. pass a Configuration too

Method Summary

void	append(WritableComparable key) Append a key to a set.

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

append, close, getIndexInterval, setIndexInterval, setIndexInterval

Methods inherited from class java.lang.Object

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

Constructor Detail

SetFile.Writer

public SetFile.Writer(FileSystem fs,
                      String dirName,
                      Class keyClass)
               throws IOException

Deprecated. pass a Configuration too

Create the named set for keys of the named class.

Throws:

IOException

SetFile.Writer

public SetFile.Writer(Configuration conf,
                      FileSystem fs,
                      String dirName,
                      Class keyClass,
                      SequenceFile.CompressionType compress)
               throws IOException

Create a set naming the element class and compression type.

Throws:

IOException

SetFile.Writer

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

Create a set naming the element comparator and compression type.

Throws:

IOException

Method Detail

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.

Throws:

IOException