org.apache.zookeeper.metrics

Interface CounterSet

All Known Implementing Classes:

SimpleCounterSet

public interface CounterSet

A counter refers to a value which can only increase. Usually the value is reset when the process starts. A CounterSet is a set of Counter grouped by keys.

Method Summary

Modifier and Type	Method and Description
void	add(String key, long delta) Increment the value by a given amount for the given key
default void	inc(String key) Increment the value by one for the given key

Method Detail

inc

default void inc(String key)

Increment the value by one for the given key

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

Parameters:

key - the key to increment the count

add

void add(String key,
         long delta)

Increment the value by a given amount for the given key

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

Parameters:

key - the key to increment the count for the given key

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