net.sf.hajdbc.balancer

Class RandomBalancer<D>

java.lang.Object

net.sf.hajdbc.balancer.AbstractBalancer<D>

net.sf.hajdbc.balancer.RandomBalancer<D>

Type Parameters:

D - either java.sql.Driver or javax.sql.DataSource

All Implemented Interfaces:

Balancer<D>

public class RandomBalancer<D>
extends AbstractBalancer<D>

Balancer implementation whose next() implementation returns a random database. The probability that a given database will be returned is: weight / total-weight.

Author:

Paul Ferraro

Field Summary

Fields inherited from class net.sf.hajdbc.balancer.AbstractBalancer

databaseSet, lock

Constructor Summary

Constructors

Constructor and Description
RandomBalancer()

Method Summary

Modifier and Type	Method and Description
protected void	added(Database<D> database) Called when a database was added to the set.
protected void	cleared() Called when the set was cleared.
Database<D>	next() Returns the next database from this balancer
protected void	removed(Database<D> database) Called when a database was removed from the set.

Methods inherited from class net.sf.hajdbc.balancer.AbstractBalancer

add, afterInvocation, all, beforeInvocation, clear, remove

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomBalancer

public RandomBalancer()

Method Detail

next

public Database<D> next()

Description copied from interface: Balancer

Returns the next database from this balancer

Returns:

the next database from this balancer

See Also:

Balancer.next()

added

protected void added(Database<D> database)

Description copied from class: AbstractBalancer

Called when a database was added to the set.

Specified by:

added in class AbstractBalancer<D>

Parameters:

database - a database descriptor

See Also:

AbstractBalancer.added(net.sf.hajdbc.Database)

removed

protected void removed(Database<D> database)

Description copied from class: AbstractBalancer

Called when a database was removed from the set.

Specified by:

removed in class AbstractBalancer<D>

Parameters:

database - a database descriptor

See Also:

AbstractBalancer.removed(net.sf.hajdbc.Database)

cleared

protected void cleared()

Description copied from class: AbstractBalancer

Called when the set was cleared.

Specified by:

cleared in class AbstractBalancer<D>

See Also:

AbstractBalancer.cleared()