org.apache.hadoop.examples
Class DBCountPageView

java.lang.Object
  extended by org.apache.hadoop.conf.Configured
      extended by org.apache.hadoop.examples.DBCountPageView
All Implemented Interfaces:
Configurable, Tool

public class DBCountPageView
extends Configured
implements Tool

This is a demonstrative program, which uses DBInputFormat for reading the input data from a database, and DBOutputFormat for writing the data to the database.
The Program first creates the necessary tables, populates the input table and runs the mapred job.
The input data is a mini access log, with a <url,referrer,time> schema.The output is the number of pageviews of each url in the log, having the schema <url,pageview>. When called with no arguments the program starts a local HSQLDB server, and uses this database for storing/retrieving the data.


Constructor Summary
DBCountPageView()
           
 
Method Summary
static void main(String[] args)
           
 int run(String[] args)
          Execute the command with the given arguments.
 
Methods inherited from class org.apache.hadoop.conf.Configured
getConf, setConf
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.hadoop.conf.Configurable
getConf, setConf
 

Constructor Detail

DBCountPageView

public DBCountPageView()
Method Detail

run

public int run(String[] args)
        throws Exception
Description copied from interface: Tool
Execute the command with the given arguments.

Specified by:
run in interface Tool
Parameters:
args - command specific arguments.
Returns:
exit code.
Throws:
Exception

main

public static void main(String[] args)
                 throws Exception
Throws:
Exception


Copyright © 2009 The Apache Software Foundation