Package com.codahale.metrics

Interface Summary

Interface	Description
Counting	An interface for metric types which have counts.
CsvFileProvider	This interface allows a pluggable implementation of what file names the CsvReporter will write to.
Gauge<T>	A gauge metric is an instantaneous reading of a particular value.
Metered	An object which maintains mean and moving average rates.
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.MetricSupplier<T extends Metric>
MetricRegistryListener	Listeners for events from the registry.
MetricSet	A set of named metrics.
MovingAverages	A triple of moving averages (one-, five-, and fifteen-minute moving average) as needed by Meter.
Reporter
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.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.
ExponentialMovingAverages	A triple (one, five and fifteen minutes) of exponentially-weighted moving average rates as needed by Meter.
FixedNameCsvFileProvider	This implementation of the CsvFileProvider will always return the same name for the same metric.
Histogram	A metric which calculates the distribution of a value.
InstrumentedExecutorService	An ExecutorService that monitors the number of tasks submitted, running, completed and also keeps a Timer for the task duration.
InstrumentedScheduledExecutorService	An ScheduledExecutorService that monitors the number of tasks submitted, running, completed and also keeps a Timer for the task duration.
InstrumentedThreadFactory	A ThreadFactory that monitors the number of threads created, running and terminated.
Meter	A meter metric which measures mean throughput and one-, five-, and fifteen-minute moving average throughputs.
MetricRegistry	A registry of metric instances.
MetricRegistryListener.Base	A no-op implementation of MetricRegistryListener.
NoopMetricRegistry	A registry of metric instances which never creates or registers any metrics and returns no-op implementations of any metric type.
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).
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 Slf4jReporter instances.
SlidingTimeWindowArrayReservoir	A Reservoir implementation backed by a sliding window that stores only the measurements made in the last N seconds (or other time unit).
SlidingTimeWindowMovingAverages	A triple of simple moving average rates (one, five and fifteen minutes rates) as needed by Meter.
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.
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.
UniformSnapshot	A statistical snapshot of a UniformSnapshot.
WeightedSnapshot	A statistical snapshot of a WeightedSnapshot.
WeightedSnapshot.WeightedSample	A single sample item with value and its weights for WeightedSnapshot.

Enum Summary

Enum	Description
MetricAttribute	Represents attributes of metrics which can be reported.
Slf4jReporter.LoggingLevel