AbstractSourceStatistic

java.lang.Object
- org.terracotta.statistics.AbstractSourceStatistic<T>

All Implemented Interfaces:

SourceStatistic<T>

Direct Known Subclasses:

AbstractOperationStatistic, OperationResultFilter
```
public class AbstractSourceStatistic<T extends ChainedObserver>
extends java.lang.Object
implements SourceStatistic<T>
```
An abstract SourceStatistic that handles derived statistic (de)registration.
This implementation exposes the currently registered statistics via the derivedStatistics collection. Concrete implementations of this class should fire on the contents of this to update the derived statistics.

Field Summary

Fields
Modifier and Type Field Description

protected java.util.Collection<T> derivedStatistics

Constructor Summary

Constructors
Constructor Description

AbstractSourceStatistic()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addDerivedStatistic(T derived)`	Register the given `Observer` to be called by this `SourceStatistic`
`java.util.Collection<T>`	`getDerivedStatistics()`	Retrieve all registered statistics.
`void`	`removeDerivedStatistic(T derived)`	Remove the given registered `Observer` from this `SourceStatistic`.

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

- Field Detail
  - derivedStatistics
```
protected final java.util.Collection<T extends ChainedObserver> derivedStatistics
```
- Constructor Detail
  - AbstractSourceStatistic
```
public AbstractSourceStatistic()
```
- Method Detail
  - addDerivedStatistic
```
public void addDerivedStatistic(T derived)
```
    Description copied from interface: SourceStatistic
    
    Register the given Observer to be called by this SourceStatistic
    
    Specified by:
    
    addDerivedStatistic in interface SourceStatistic<T extends ChainedObserver>
    
    Parameters:
    
    derived - statistic to be registered
  - removeDerivedStatistic
```
public void removeDerivedStatistic(T derived)
```
    Description copied from interface: SourceStatistic
    
    Remove the given registered Observer from this SourceStatistic.
    
    Specified by:
    
    removeDerivedStatistic in interface SourceStatistic<T extends ChainedObserver>
    
    Parameters:
    
    derived - statistic to be removed
  - getDerivedStatistics
```
public java.util.Collection<T> getDerivedStatistics()
```
    Description copied from interface: SourceStatistic
    
    Retrieve all registered statistics.
    
    Specified by:
    
    getDerivedStatistics in interface SourceStatistic<T extends ChainedObserver>
    
    Returns:
    
    an unmodifiable collection of all derived statistics