org.apache.zookeeper.metrics

Interface Counter

All Known Implementing Classes:

SimpleCounter

public interface Counter

A counter refers to a value which can only increase. Usually the value is reset when the process starts.

Method Summary

Modifier and Type	Method and Description
void	add(long delta) Increment the value by a given amount.
long	get() Get the current value held by the counter.
default void	inc() Increment the value by one.

Method Detail

inc

default void inc()

Increment the value by one.

This method is thread safe, The MetricsProvider will take care of synchronization.

add

void add(long delta)

Increment the value by a given amount.

This method is thread safe, The MetricsProvider will take care of synchronization.

Parameters:

delta - amount to increment, this cannot be a negative number.

get

long get()

Get the current value held by the counter.

This method is thread safe, The MetricsProvider will take care of synchronization.

Returns:

the current value