edu.yale.cs.hadoopdb.catalog
Class Catalog

java.lang.Object
  edu.yale.cs.hadoopdb.catalog.Catalog

public class Catalog
extends java.lang.Object

HadoopDB Catalog: Simple XML file based implementation. No support for mid-job updates except by recreating the XML catalog file and re-executing the job.

Field Summary

static org.apache.commons.logging.Log	LOG
private boolean	replication
private static Catalog	singleton
private ConfigurationMapping	xmlConfig

Constructor Summary

private

Catalog(org.apache.hadoop.mapred.JobConf job)

Method Summary

static Catalog	getInstance(org.apache.hadoop.mapred.JobConf job)
void	setSplitLocationStructure(BaseDBConfiguration dbConf, java.lang.String relation) For a given relation, it populates the configuration object with the different chunks associated with the relation.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

replication

private boolean replication

singleton

private static Catalog singleton

xmlConfig

private ConfigurationMapping xmlConfig

Constructor Detail

Catalog

private Catalog(org.apache.hadoop.mapred.JobConf job)

Method Detail

getInstance

public static Catalog getInstance(org.apache.hadoop.mapred.JobConf job)

setSplitLocationStructure

public void setSplitLocationStructure(BaseDBConfiguration dbConf,
                                      java.lang.String relation)

For a given relation, it populates the configuration object with the different chunks associated with the relation. Each chunk contains connection and location information.