org.terracotta.counter
Interface Counter

All Superinterfaces:

Statistic

All Known Implementing Classes:

BoundedCounter, SimpleCounterImpl

public interface Counter
extends Statistic

A simple long based counter.

Method Summary

long	decrement() Decrements the count by one.
long	decrement(long amount) Decrements the count by amount.
long	getAndSet(long newValue) Set the count to the supplied value, and return the old value.
long	increment() Increments the count by one.
long	increment(long amount) Increments the count by amount.
void	setValue(long newValue) Set the count to the supplied value.

Methods inherited from interface org.terracotta.counter.Statistic

getAndReset, getValue

Method Detail

increment

long increment()

Increments the count by one.

Returns:

the new count value

decrement

long decrement()

Decrements the count by one.

Returns:

the new count value

getAndSet

long getAndSet(long newValue)

Set the count to the supplied value, and return the old value.

Implementations of this method need not be atomic, all though this method is obviously of little value if the implementation is not atomic.

Parameters:

newValue - value to set to

Returns:

the old value

increment

long increment(long amount)

Increments the count by amount.

Parameters:

amount - amount to increment by

Returns:

the new value

decrement

long decrement(long amount)

Decrements the count by amount.

Parameters:

amount - amount to increment by

Returns:

the new value

setValue

void setValue(long newValue)

Set the count to the supplied value.

Parameters:

newValue - value to set to