Package com.codahale.metrics

Interface Summary

Interface	Description
Counting	An interface for metric types which have counts.
Gauge<T>	A gauge metric is an instantaneous reading of a particular value.
JmxReporter.JmxCounterMBean
JmxReporter.JmxGaugeMBean
JmxReporter.JmxHistogramMBean
JmxReporter.JmxMeterMBean
JmxReporter.JmxTimerMBean
JmxReporter.MetricMBean
Metered	An object which maintains mean and exponentially-weighted rate.
Metric	A tag interface to indicate that a class is a metric.
MetricFilter	A filter used to determine whether or not a metric should be reported, among other things.
MetricRegistry.MetricBuilder<T extends Metric>	A quick and easy way of capturing the notion of default metrics.
MetricRegistryListener	Listeners for events from the registry.
MetricSet	A set of named metrics.
Reservoir	A statistically representative reservoir of a data stream.
Sampling	An object which samples values.

Class Summary

Class	Description
CachedGauge<T>	A Gauge implementation which caches its value for a period of time.
Clock	An abstraction for how time passes.
Clock.CpuTimeClock	A clock implementation which returns the current thread's CPU time.
Clock.UserTimeClock	A clock implementation which returns the current time in epoch nanoseconds.
ConsoleReporter	A reporter which outputs measurements to a PrintStream, like System.out.
ConsoleReporter.Builder	A builder for ConsoleReporter instances.
Counter	An incrementing and decrementing counter metric.
CsvReporter	A reporter which creates a comma-separated values file of the measurements for each metric.
CsvReporter.Builder	A builder for CsvReporter instances.
DerivativeGauge<F,T>	A gauge whose value is derived from the value of another gauge.
EWMA	An exponentially-weighted moving average.
ExponentiallyDecayingReservoir	An exponentially-decaying random reservoir of longs.
Histogram	A metric which calculates the distribution of a value.
JmxAttributeGauge	A Gauge implementation which queries a MBeanServer for an attribute of an object.
JmxReporter	A reporter which listens for new metrics and exposes them as namespaced MBeans.
JmxReporter.AbstractBean
JmxReporter.Builder	A builder for CsvReporter instances.
JmxReporter.JmxCounter
JmxReporter.JmxGauge
JmxReporter.JmxHistogram
JmxReporter.JmxListener
JmxReporter.JmxMeter
JmxReporter.JmxTimer
JmxReporter.MetricTimeUnits
JvmAttributeGaugeSet	A set of gauges for the JVM name, vendor, and uptime.
LongAdder	One or more variables that together maintain an initially zero long sum.
Meter	A meter metric which measures mean throughput and one-, five-, and fifteen-minute exponentially-weighted moving average throughputs.
MetricRegistry	A registry of metric instances.
MetricRegistryListener.Base	A no-op implementation of MetricRegistryListener.
RatioGauge	A gauge which measures the ratio of one value to another.
RatioGauge.Ratio	A ratio of one quantity to another.
ScheduledReporter	The abstract base class for all scheduled reporters (i.e., reporters which process a registry's metrics periodically).
ScheduledReporter.NamedThreadFactory	A simple named thread factory.
SharedMetricRegistries	A map of shared, named metric registries.
Slf4jReporter	A reporter class for logging metrics values to a SLF4J Logger periodically, similar to ConsoleReporter or CsvReporter, but using the SLF4J framework instead.
Slf4jReporter.Builder	A builder for CsvReporter instances.
SlidingTimeWindowReservoir	A Reservoir implementation backed by a sliding window that stores only the measurements made in the last N seconds (or other time unit).
SlidingWindowReservoir	A Reservoir implementation backed by a sliding window that stores the last N measurements.
Snapshot	A statistical snapshot of a Snapshot.
Striped64	A package-local class holding common representation and mechanics for classes supporting dynamic striping on 64bit values.
Striped64.Cell	Padded variant of AtomicLong supporting only raw accesses plus CAS.
Striped64.HashCode	Holder for the thread-local hash code.
Striped64.ThreadHashCode	The corresponding ThreadLocal class
ThreadLocalRandom	Copied directly from the JSR-166 project.
Timer	A timer metric which aggregates timing durations and provides duration statistics, plus throughput statistics via Meter.
Timer.Context	A timing context.
UniformReservoir	A random sampling reservoir of a stream of longs.