net.sf.hajdbc.balancer.simple

Class SimpleBalancer<Z,D extends Database<Z>>

java.lang.Object

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

net.sf.hajdbc.balancer.AbstractSetBalancer<Z,D>

net.sf.hajdbc.balancer.simple.SimpleBalancer<Z,D>

Type Parameters:

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

All Implemented Interfaces:

Iterable<D>, Collection<D>, Set<D>, Balancer<Z,D>

public class SimpleBalancer<Z,D extends Database<Z>>
extends AbstractSetBalancer<Z,D>

Trivial balancer implementation whose next() implementation always returns the database with the highest weight.

Author:

Paul Ferraro

Constructor Summary

Constructors

Constructor and Description
SimpleBalancer(Set<D> databases) Constructs a new SimpleBalancer

Method Summary

Methods

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

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

add, addAll, clear, getDatabases, getLock, invoke, primary, remove, removeAll, retainAll

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

backups, contains, containsAll, equals, hashCode, isEmpty, iterator, size, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SimpleBalancer

public SimpleBalancer(Set<D> databases)

Constructs a new SimpleBalancer

Parameters:

databases -

Method Detail

next

public D next()

Returns the next database from this balancer

Returns:

the next database from this balancer

See Also:

Balancer.next()

added

protected void added(D database)

Called when a database was added to the set.

Specified by:

added in class AbstractSetBalancer<Z,D extends Database<Z>>

Parameters:

database - a database descriptor

See Also:

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

removed

protected void removed(D database)

Called when a database was removed from the set.

Specified by:

removed in class AbstractSetBalancer<Z,D extends Database<Z>>

Parameters:

database - a database descriptor

See Also:

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

cleared

protected void cleared()

Called when the set was cleared.

Specified by:

cleared in class AbstractSetBalancer<Z,D extends Database<Z>>

See Also:

AbstractSetBalancer.cleared()