edu.yale.cs.hadoopdb.catalog
Class BaseDBConfiguration

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

Direct Known Subclasses:

DBConfiguration, SMSConfiguration

public class BaseDBConfiguration
extends java.lang.Object

BaseDBConfiguration re-maps the Catalog object created by ConfigurationMapping: Instead of mapping nodes to relations to chunks (partitions), it maps chunks to hosts (nodes) for a given relation.

Field Summary

protected java.util.HashMap<java.lang.String,DBChunk>	chunks
protected java.lang.String	relation

Constructor Summary

BaseDBConfiguration()

Method Summary

void	addChunk(DBChunk chunk) Maps DBChunk Object to its partition id
DBChunk	getChunk(java.lang.String id) Returns a DBChunk Object for a given chunk id
java.util.Collection<DBChunk>	getChunks() Returns a list of DBChunk Objects for a given relation
java.lang.String	getRelation() Get relation (Relation maintained for bookkeeping, not used internally)
void	setRelation(java.lang.String relation) Set relation for bookkeeping purpose, not used internally

Methods inherited from class java.lang.Object

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

Field Detail

chunks

protected java.util.HashMap<java.lang.String,DBChunk> chunks

relation

protected java.lang.String relation

Constructor Detail

BaseDBConfiguration

public BaseDBConfiguration()

Method Detail

addChunk

public void addChunk(DBChunk chunk)

Maps DBChunk Object to its partition id

Parameters:

chunk -

getChunk

public DBChunk getChunk(java.lang.String id)

Returns a DBChunk Object for a given chunk id

Parameters:

id - a chunk of a particular relation

Returns:

DBChunk chunk for a given id

getChunks

public java.util.Collection<DBChunk> getChunks()

Returns a list of DBChunk Objects for a given relation

Returns:

Collection chunks

getRelation

public java.lang.String getRelation()

Get relation (Relation maintained for bookkeeping, not used internally)

Returns:

relation the relation's identifier

setRelation

public void setRelation(java.lang.String relation)

Set relation for bookkeeping purpose, not used internally

Parameters:

relation - the relation's identifier