Class DefaultLogger

java.lang.Object

io.perl.logger.impl.ResultsLogger

io.perl.logger.impl.DefaultLogger

All Implemented Interfaces:

PerformanceLogger, Print, ReportLatency

Direct Known Subclasses:

DefaultPrometheusLogger

public class DefaultLogger
extends ResultsLogger

Simple textual results logger that prints the formatted summary to stdout.

This concrete logger is a thin convenience wrapper around ResultsLogger that exposes two constructors: a fully-configurable constructor and a no-argument convenience constructor that uses default values from configuration. Use this logger when you want human-readable results on the console or redirected to a file.

The individual-latency callback is a final no-op so the default reporting path cannot add work to the single PerL performance-recorder thread. Custom loggers that require individual latency values should extend ResultsLogger or implement PerformanceLogger directly.

Constructor Summary

Constructors

Constructor	Description
DefaultLogger()	Constructor DefaultLogger takes no arguments but initialize all values with default values.
DefaultLogger(String header, double[] percentiles, TimeUnit latencyTimeUnit, long minLatency, long maxLatency)	Constructor DefaultLogger pass all values to its super class.

Method Summary

Modifier and Type	Method	Description
final void	recordLatency(long startTime, int events, int bytes, long latency)	Intentionally ignores the individual latency callback.
final boolean	recordsIndividualLatencies()	Indicates whether this logger consumes every individual latency value.

Methods inherited from class ResultsLogger

appendResultString, getMaxLatency, getMinLatency, getPercentileNames, getPercentiles, getPrefix, getTimeUnit, print, printTotal, setMaxLatency, setMinLatency, setPercentiles, setPrefix, setTimeUnit

Methods inherited from class Object

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

Methods inherited from interface PerformanceLogger

getPrintingIntervalSeconds

Constructor Details

DefaultLogger

public DefaultLogger(String header,
 double[] percentiles,
 TimeUnit latencyTimeUnit,
 long minLatency,
 long maxLatency)

Constructor DefaultLogger pass all values to its super class.

Parameters:

header - String

percentiles - double[]

latencyTimeUnit - TimeUnit

minLatency - long

maxLatency - long

DefaultLogger

public DefaultLogger()

Constructor DefaultLogger takes no arguments but initialize all values with default values.

Method Details

recordLatency

public final void recordLatency(long startTime,
 int events,
 int bytes,
 long latency)

Intentionally ignores the individual latency callback.

Parameters:

startTime - event start time

events - number of events represented by this measurement

bytes - number of bytes represented by this measurement

latency - measured latency

recordsIndividualLatencies

public final boolean recordsIndividualLatencies()

Description copied from interface: PerformanceLogger

Indicates whether this logger consumes every individual latency value.

The default preserves compatibility for custom loggers. Loggers with a final no-op PerformanceLogger.recordLatency(long, int, int, long) implementation should return false, allowing PerL to omit the callback from its single-threaded measurement path.

Returns:

true when PerL must invoke recordLatency for every event