policyMgmt
Class Counter64

java.lang.Object
  |
  +--policyMgmt.Counter64

public class Counter64

extends java.lang.Object

64bit Counter. Is clever enough to remember the current as well as the previous state of the observed variable. Gives easy access to the delta between them. Wraps wil produce reasonable values.

Constructor Summary

Counter64()

Method Summary

int	compareTo(long value) Compare this counter to a long value.
long	getLowDelta() Return a 63-bit representation of the current delta.
long	getLowValue() Return a 63-bit representation of the current value.
void	increment(long delta) Add delta to the current state of the object.
void	upate(long newValue) Set the counter to the new value without touching delta information.

Methods inherited from class java.lang.Object

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

Constructor Detail

Counter64

public Counter64()

Method Detail

upate

public void upate(long newValue)

Set the counter to the new value without touching delta information. May be used for initialization only.

Parameters:

newValue - the new value

increment

public void increment(long delta)

Add delta to the current state of the object. Handle wrapping.

Parameters:

delta - the value to add

getLowValue

public long getLowValue()

Return a 63-bit representation of the current value.

Returns:

the current value

getLowDelta

public long getLowDelta()

Return a 63-bit representation of the current delta.

Returns:

the last delta value

compareTo

public int compareTo(long value)

Compare this counter to a long value.

Parameters:

value - the reference value

Returns:

0, on equal; -1, if arg > counter; 1, if arg < counter