org.springframework.boot.actuate.metrics.repository

Class InMemoryMetricRepository

java.lang.Object

org.springframework.boot.actuate.metrics.repository.InMemoryMetricRepository

All Implemented Interfaces:

MetricReader, MetricRepository, CounterWriter, GaugeWriter, MetricWriter

public class InMemoryMetricRepository
extends Object
implements MetricRepository

MetricRepository implementation that stores metrics in memory.

Since:

1.0.0

Author:

Dave Syer, Stephane Nicoll

Constructor Summary

Constructors

Constructor and Description
InMemoryMetricRepository()

Method Summary

Modifier and Type	Method and Description
long	count() The number of metrics known to this reader.
Iterable<Metric<?>>	findAll() Find all the metrics known to this reader.
Iterable<Metric<?>>	findAllWithPrefix(String prefix)
Metric<?>	findOne(String metricName) Find an instance of the metric with the given name (usually the latest recorded value).
void	increment(Delta<?> delta) Increment the value of a metric (or decrement if the delta is negative).
void	reset(String metricName) Reset the value of a metric, usually to zero value.
void	set(Metric<?> value) Set the value of a metric.
void	setValues(ConcurrentNavigableMap<String,Metric<?>> values)

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryMetricRepository

public InMemoryMetricRepository()

Method Detail

setValues

public void setValues(ConcurrentNavigableMap<String,Metric<?>> values)

increment

public void increment(Delta<?> delta)

Description copied from interface: CounterWriter

Increment the value of a metric (or decrement if the delta is negative). The name of the delta is the name of the metric to increment.

Specified by:

increment in interface CounterWriter

Parameters:

delta - the amount to increment by

set

public void set(Metric<?> value)

Description copied from interface: GaugeWriter

Set the value of a metric.

Specified by:

set in interface GaugeWriter

Parameters:

value - the value

count

public long count()

Description copied from interface: MetricReader

The number of metrics known to this reader.

Specified by:

count in interface MetricReader

Returns:

the number of metrics

reset

public void reset(String metricName)

Description copied from interface: CounterWriter

Reset the value of a metric, usually to zero value. Implementations can discard the old values if desired, but may choose not to. This operation is optional (some implementations may not be able to fulfill the contract, in which case they should simply do nothing).

Specified by:

reset in interface CounterWriter

Parameters:

metricName - the name to reset

findOne

public Metric<?> findOne(String metricName)

Description copied from interface: MetricReader

Find an instance of the metric with the given name (usually the latest recorded value).

Specified by:

findOne in interface MetricReader

Parameters:

metricName - the name of the metric to find

Returns:

a metric value or null if there are none with that name

findAll

public Iterable<Metric<?>> findAll()

Description copied from interface: MetricReader

Find all the metrics known to this reader.

Specified by:

findAll in interface MetricReader

Returns:

all instances of metrics known to this reader

findAllWithPrefix

public Iterable<Metric<?>> findAllWithPrefix(String prefix)