Package com.alibaba.druid.pool.ha.node

Class NodeListener

java.lang.Object

java.util.Observable

com.alibaba.druid.pool.ha.node.NodeListener

Direct Known Subclasses:

FileNodeListener, ZookeeperNodeListener

public abstract class NodeListener
extends Observable

This abstract class defines a listener to monitor the change of DataSource nodes.

Author:

DigitalSonic

See Also:

• Observable

Constructor Summary

Constructors

Constructor	Description
NodeListener()

Method Summary

Modifier and Type	Method	Description
abstract void	destroy()	Do some cleanup.
Date	getLastUpdateTime()
Observer	getObserver()
String	getPrefix()
Properties	getProperties()
void	init()	Add the given PoolUpdater as the Observer.
abstract List<NodeEvent>	refresh()	The method implements the detail update logic.
void	setLastUpdateTime(Date lastUpdateTime)
void	setObserver(Observer observer)
void	setPrefix(String prefix)
void	setProperties(Properties properties)
void	update()	Fire the refresh() method and notify the Observer.
void	update(List<NodeEvent> events)	Notify the Observer.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Details

NodeListener

public NodeListener()

Method Details

refresh

public abstract List<NodeEvent> refresh()

The method implements the detail update logic.

destroy

public abstract void destroy()

Do some cleanup.

init

public void init()

Add the given PoolUpdater as the Observer.

See Also:

• setObserver(Observer)

update

public void update()

Fire the refresh() method and notify the Observer.

See Also:

• refresh()
• update(List)

update

public void update(List<NodeEvent> events)

Notify the Observer.

getObserver

public Observer getObserver()

setObserver

public void setObserver(Observer observer)

getLastUpdateTime

public Date getLastUpdateTime()

setLastUpdateTime

public void setLastUpdateTime(Date lastUpdateTime)

getProperties

public Properties getProperties()

setProperties

public void setProperties(Properties properties)

getPrefix

public String getPrefix()

setPrefix

public void setPrefix(String prefix)