hydra.blackboard

Class SharedCountersImpl

java.lang.Object

hydra.blackboard.SharedCountersImpl

All Implemented Interfaces:

SharedCounters

public class SharedCountersImpl
extends Object
implements SharedCounters

Manages a set of indexed counters. Methods are not thread-safe. Instances of this class are intended only for use by other classes such as (RmiSharedCountersImpl that overlay a transport type for cross-vm access and provide synchronization.

Constructor Summary

Constructors

Constructor and Description
SharedCountersImpl(long[] initialValues) Creates an instance with its counters set to the provided initial values.

Method Summary

Modifier and Type	Method and Description
long	add(int index, long i) Implements SharedCounters.add(int,long).
void	decrement(int index) Implements SharedCounters.decrement(int).
long	decrementAndRead(int index) Implements SharedCounters.incrementAndRead(int).
long[]	getCounterValues() Implements SharedCounters.getCounterValues().
void	increment(int index) Implements SharedCounters.increment(int).
long	incrementAndRead(int index) Increments the counter at index by 1 and returns the new count.
long	read(int index) Implements SharedCounters.read(int).
void	setIfLarger(int index, long i) Implements SharedCounters.setIfLarger(int,long).
void	setIfSmaller(int index, long i) Implements SharedCounters.setIfSmaller(int,long).
long	subtract(int index, long i) Implements SharedCounters.subtract(int,long).
void	zero(int index) Implements SharedCounters.zero(int).

Methods inherited from class java.lang.Object

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

Constructor Detail

SharedCountersImpl

public SharedCountersImpl(long[] initialValues)

Creates an instance with its counters set to the provided initial values. The number of counters managed by this instance is equal to the number of initial values.

Method Detail

read

public long read(int index)

Implements SharedCounters.read(int).

Specified by:

read in interface SharedCounters

add

public long add(int index,
                long i)

Implements SharedCounters.add(int,long).

Specified by:

add in interface SharedCounters

subtract

public long subtract(int index,
                     long i)

Implements SharedCounters.subtract(int,long).

Specified by:

subtract in interface SharedCounters

increment

public void increment(int index)

Implements SharedCounters.increment(int).

Specified by:

increment in interface SharedCounters

decrement

public void decrement(int index)

Implements SharedCounters.decrement(int).

Specified by:

decrement in interface SharedCounters

incrementAndRead

public long incrementAndRead(int index)

Increments the counter at index by 1 and returns the new count.

Specified by:

incrementAndRead in interface SharedCounters

decrementAndRead

public long decrementAndRead(int index)

Implements SharedCounters.incrementAndRead(int).

Specified by:

decrementAndRead in interface SharedCounters

zero

public void zero(int index)

Implements SharedCounters.zero(int).

Specified by:

zero in interface SharedCounters

setIfLarger

public void setIfLarger(int index,
                        long i)

Implements SharedCounters.setIfLarger(int,long).

Specified by:

setIfLarger in interface SharedCounters

setIfSmaller

public void setIfSmaller(int index,
                         long i)

Implements SharedCounters.setIfSmaller(int,long).

Specified by:

setIfSmaller in interface SharedCounters

getCounterValues

public long[] getCounterValues()

Implements SharedCounters.getCounterValues().

Specified by:

getCounterValues in interface SharedCounters