NodeListener (druid 1.2.26 API)

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

All Methods Instance Methods Abstract Methods Concrete Methods
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 Detail
- NodeListener
```
public NodeListener()
```

Method Detail

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)