org.onlab.util

Class SlidingWindowCounter

java.lang.Object

org.onlab.util.SlidingWindowCounter

public final class SlidingWindowCounter
extends java.lang.Object

Maintains a sliding window of value counts. The sliding window counter is initialized with a number of window slots. Calls to #incrementCount() will increment the value in the current window slot. Periodically the window slides and the oldest value count is dropped. Calls to #get() will get the total count for the last N window slots.

Constructor Summary

Constructors

Constructor and Description
SlidingWindowCounter(int windowSlots) Creates a new sliding window counter with the given total number of window slots.

Method Summary

Modifier and Type	Method and Description
void	destroy() Releases resources used by the SlidingWindowCounter.
long	get(int slots) Gets the total count for the last N window slots.
void	incrementCount() Increments the count of the current window slot by 1.
void	incrementCount(long value) Increments the count of the current window slot by the given value.

Methods inherited from class java.lang.Object

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

Constructor Detail

SlidingWindowCounter

public SlidingWindowCounter(int windowSlots)

Creates a new sliding window counter with the given total number of window slots.

Parameters:

windowSlots - total number of window slots

Method Detail

destroy

public void destroy()

Releases resources used by the SlidingWindowCounter.

incrementCount

public void incrementCount()

Increments the count of the current window slot by 1.

incrementCount

public void incrementCount(long value)

Increments the count of the current window slot by the given value.

Parameters:

value - value to increment by

get

public long get(int slots)

Gets the total count for the last N window slots.

Parameters:

slots - number of slots to include in the count

Returns:

total count for last N slots