net.sf.hajdbc.balancer

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

java.lang.Object

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

Type Parameters:

Z -

D -

All Implemented Interfaces:

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

Direct Known Subclasses:

AbstractSetBalancer, LoadBalancer

public abstract class AbstractBalancer<Z,D extends Database<Z>>
extends Object
implements Balancer<Z,D>

Thread-safe abstract balancer implementation that implements most of the Balancer interface, except Balancer.next(). Uses A copy-on-write algorithm for Set.add(Object), Set.remove(Object), and Set.clear(). Calls to iterator() are non-blocking.

Author:

Paul Ferraro

Constructor Summary

Constructors

Constructor and Description
AbstractBalancer()

Method Summary

Methods

Modifier and Type	Method and Description
Iterable<D>	backups() The non-primary databases.
boolean	contains(Object database)
boolean	containsAll(Collection<?> databases)
boolean	equals(Object object)
protected abstract Set<D>	getDatabases()
int	hashCode()
boolean	isEmpty()
Iterator<D>	iterator()
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] array)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.hajdbc.balancer.Balancer

invoke, next, primary

Methods inherited from interface java.util.Set

add, addAll, clear, remove, removeAll, retainAll

Constructor Detail

AbstractBalancer

public AbstractBalancer()

Method Detail

getDatabases

protected abstract Set<D> getDatabases()

backups

public Iterable<D> backups()

The non-primary databases.

Specified by:

backups in interface Balancer<Z,D extends Database<Z>>

Returns:

an iterable collection of databases.

See Also:

Balancer.backups()

iterator

public Iterator<D> iterator()

Specified by:

iterator in interface Iterable<D extends Database<Z>>

Specified by:

iterator in interface Collection<D extends Database<Z>>

Specified by:

iterator in interface Set<D extends Database<Z>>

See Also:

Set.iterator()

contains

public boolean contains(Object database)

Specified by:

contains in interface Collection<D extends Database<Z>>

Specified by:

contains in interface Set<D extends Database<Z>>

See Also:

Set.contains(java.lang.Object)

containsAll

public boolean containsAll(Collection<?> databases)

Specified by:

containsAll in interface Collection<D extends Database<Z>>

Specified by:

containsAll in interface Set<D extends Database<Z>>

See Also:

Set.containsAll(java.util.Collection)

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<D extends Database<Z>>

Specified by:

isEmpty in interface Set<D extends Database<Z>>

See Also:

Set.isEmpty()

size

public int size()

Specified by:

size in interface Collection<D extends Database<Z>>

Specified by:

size in interface Set<D extends Database<Z>>

See Also:

Set.size()

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<D extends Database<Z>>

Specified by:

toArray in interface Set<D extends Database<Z>>

See Also:

Set.toArray()

toArray

public <T> T[] toArray(T[] array)

Specified by:

toArray in interface Collection<D extends Database<Z>>

Specified by:

toArray in interface Set<D extends Database<Z>>

equals

public boolean equals(Object object)

Specified by:

equals in interface Collection<D extends Database<Z>>

Specified by:

equals in interface Set<D extends Database<Z>>

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<D extends Database<Z>>

Specified by:

hashCode in interface Set<D extends Database<Z>>

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

toString

public String toString()

Overrides:

toString in class Object