ObservableConfiguration (Apache Accumulo Core 2.0.0 API)

java.lang.Object
- org.apache.accumulo.core.conf.AccumuloConfiguration
- - org.apache.accumulo.core.conf.ObservableConfiguration

All Implemented Interfaces:

Iterable<Map.Entry<String,String>>
```
public abstract class ObservableConfiguration
extends AccumuloConfiguration
```
A configuration that can be observed. Handling of observers is thread-safe.

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.accumulo.core.conf.AccumuloConfiguration
  AccumuloConfiguration.ScanExecutorConfig

Constructor Summary

Constructors
Constructor Description

ObservableConfiguration()
Creates a new observable configuration.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addObserver(ConfigurationObserver co)`	Adds an observer.
`void`	`expireAllObservers()`	Expires all observers.
`Collection<ConfigurationObserver>`	`getObservers()`	Gets the current set of observers.
`void`	`propertiesChanged()`	Notifies all observers that properties changed.
`void`	`propertyChanged(String key)`	Notifies all observers that a property changed.
`void`	`removeObserver(ConfigurationObserver co)`	Removes an observer.

Methods inherited from class org.apache.accumulo.core.conf.AccumuloConfiguration
get, get, getAllPropertiesWithPrefix, getAsBytes, getBoolean, getCount, getFraction, getMaxFilesPerTablet, getPath, getPort, getProperties, getScanExecutors, getTimeInMillis, getUpdateCount, invalidateCache, isPropertySet, iterator, resolve

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- Constructor Detail
  - ObservableConfiguration
```
public ObservableConfiguration()
```
    Creates a new observable configuration.
- Method Detail
  - addObserver
```
public void addObserver(ConfigurationObserver co)
```
    Adds an observer.
    
    Parameters:
    
    co - observer
    
    Throws:
    
    NullPointerException - if co is null
  - removeObserver
```
public void removeObserver(ConfigurationObserver co)
```
    Removes an observer.
    
    Parameters:
    
    co - observer
  - getObservers
```
public Collection<ConfigurationObserver> getObservers()
```
    Gets the current set of observers. The returned collection is a snapshot, and changes to it do not reflect back to the configuration.
    
    Returns:
    
    observers
  - expireAllObservers
```
public void expireAllObservers()
```
    Expires all observers.
  - propertyChanged
```
public void propertyChanged(String key)
```
    Notifies all observers that a property changed.
    
    Parameters:
    
    key - configuration property key
  - propertiesChanged
```
public void propertiesChanged()
```
    Notifies all observers that properties changed.