org.apache.accumulo.server.tabletserver.log
Class MultiReader
java.lang.Object
org.apache.accumulo.server.tabletserver.log.MultiReader
public class MultiReader
- extends Object
Provide simple Map.Reader methods over multiple Maps.
Presently only supports next() and seek() and works on all the Map directories within a directory. The primary purpose of this class is to merge the results
of multiple Reduce jobs that result in Map output files.
Constructor Summary |
MultiReader(org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.conf.Configuration conf,
String directory)
|
Method Summary |
void |
close()
|
boolean |
next(org.apache.hadoop.io.WritableComparable key,
org.apache.hadoop.io.Writable val)
|
boolean |
seek(org.apache.hadoop.io.WritableComparable key)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MultiReader
public MultiReader(org.apache.hadoop.fs.FileSystem fs,
org.apache.hadoop.conf.Configuration conf,
String directory)
throws IOException
- Throws:
IOException
next
public boolean next(org.apache.hadoop.io.WritableComparable key,
org.apache.hadoop.io.Writable val)
throws IOException
- Throws:
IOException
seek
public boolean seek(org.apache.hadoop.io.WritableComparable key)
throws IOException
- Throws:
IOException
close
public void close()
throws IOException
- Throws:
IOException
Copyright © 2012 The Apache Software Foundation. All Rights Reserved.