com.espertech.esper.metrics.codahale_metrics.metrics.reporting

Class CsvReporter

java.lang.Object

com.espertech.esper.metrics.codahale_metrics.metrics.reporting.AbstractReporter

com.espertech.esper.metrics.codahale_metrics.metrics.reporting.AbstractPollingReporter

com.espertech.esper.metrics.codahale_metrics.metrics.reporting.CsvReporter

All Implemented Interfaces:

MetricProcessor<CsvReporter.Context>, java.lang.Runnable

public class CsvReporter
extends AbstractPollingReporter
implements MetricProcessor<CsvReporter.Context>

A reporter which periodically appends data from each metric to a metric-specific CSV file in an output directory.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CsvReporter.Context The context used to output metrics.

Constructor Summary

Constructors

Constructor and Description
CsvReporter(MetricsRegistry metricsRegistry, java.io.File outputDir) Creates a new CsvReporter which will write all metrics from the given MetricsRegistry to CSV files in the given output directory.
CsvReporter(MetricsRegistry metricsRegistry, MetricPredicate predicate, java.io.File outputDir) Creates a new CsvReporter which will write metrics from the given MetricsRegistry which match the given MetricPredicate to CSV files in the given output directory.
CsvReporter(MetricsRegistry metricsRegistry, MetricPredicate predicate, java.io.File outputDir, Clock clock) Creates a new CsvReporter which will write metrics from the given MetricsRegistry which match the given MetricPredicate to CSV files in the given output directory.

Method Summary

Modifier and Type	Method and Description
protected java.io.PrintStream	createStreamForMetric(MetricName metricName) Returns an opened PrintStream for the given MetricName which outputs data to a metric-specific .csv file in the output directory.
static void	enable(java.io.File outputDir, long period, java.util.concurrent.TimeUnit unit) Enables the CSV reporter for the default metrics registry, and causes it to write to files in outputDir with the specified period.
static void	enable(MetricsRegistry metricsRegistry, java.io.File outputDir, long period, java.util.concurrent.TimeUnit unit) Enables the CSV reporter for the given metrics registry, and causes it to write to files in outputDir with the specified period.
void	processCounter(MetricName name, Counter counter, CsvReporter.Context context) Process the given counter.
void	processGauge(MetricName name, Gauge<?> gauge, CsvReporter.Context context) Process the given gauge.
void	processHistogram(MetricName name, Histogram histogram, CsvReporter.Context context) Process the given histogram.
void	processMeter(MetricName name, Metered meter, CsvReporter.Context context) Process the given Metered instance.
void	processTimer(MetricName name, Timer timer, CsvReporter.Context context) Process the given timer.
void	run() The method called when a a poll is scheduled to occur.
void	shutdown() Stops the reporter and closes any internal resources.
void	start(long period, java.util.concurrent.TimeUnit unit) Starts the reporter polling at the given period.

Methods inherited from class com.espertech.esper.metrics.codahale_metrics.metrics.reporting.AbstractPollingReporter

shutdown

Methods inherited from class com.espertech.esper.metrics.codahale_metrics.metrics.reporting.AbstractReporter

getMetricsRegistry

Methods inherited from class java.lang.Object

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

Constructor Detail

CsvReporter

public CsvReporter(MetricsRegistry metricsRegistry,
                   java.io.File outputDir)

Creates a new CsvReporter which will write all metrics from the given MetricsRegistry to CSV files in the given output directory.

Parameters:

outputDir - the directory to which files will be written

metricsRegistry - the MetricsRegistry containing the metrics this reporter will report

CsvReporter

public CsvReporter(MetricsRegistry metricsRegistry,
                   MetricPredicate predicate,
                   java.io.File outputDir)

Creates a new CsvReporter which will write metrics from the given MetricsRegistry which match the given MetricPredicate to CSV files in the given output directory.

Parameters:

metricsRegistry - the MetricsRegistry containing the metrics this reporter will report

predicate - the MetricPredicate which metrics are required to match before being written to files

outputDir - the directory to which files will be written

CsvReporter

public CsvReporter(MetricsRegistry metricsRegistry,
                   MetricPredicate predicate,
                   java.io.File outputDir,
                   Clock clock)

Creates a new CsvReporter which will write metrics from the given MetricsRegistry which match the given MetricPredicate to CSV files in the given output directory.

Parameters:

metricsRegistry - the MetricsRegistry containing the metrics this reporter will report

predicate - the MetricPredicate which metrics are required to match before being written to files

outputDir - the directory to which files will be written

clock - the clock used to measure time

Method Detail

enable

public static void enable(java.io.File outputDir,
                          long period,
                          java.util.concurrent.TimeUnit unit)

Enables the CSV reporter for the default metrics registry, and causes it to write to files in outputDir with the specified period.

Parameters:

outputDir - the directory in which .csv files will be created

period - the period between successive outputs

unit - the time unit of period

enable

public static void enable(MetricsRegistry metricsRegistry,
                          java.io.File outputDir,
                          long period,
                          java.util.concurrent.TimeUnit unit)

Enables the CSV reporter for the given metrics registry, and causes it to write to files in outputDir with the specified period.

Parameters:

metricsRegistry - the metrics registry

outputDir - the directory in which .csv files will be created

period - the period between successive outputs

unit - the time unit of period

createStreamForMetric

protected java.io.PrintStream createStreamForMetric(MetricName metricName)
                                             throws java.io.IOException

Returns an opened PrintStream for the given MetricName which outputs data to a metric-specific .csv file in the output directory.

Parameters:

metricName - the name of the metric

Returns:

an opened PrintStream specific to metricName

Throws:

java.io.IOException - if there is an error opening the stream

run

public void run()

Description copied from class: AbstractPollingReporter

The method called when a a poll is scheduled to occur.

Specified by:

run in interface java.lang.Runnable

Specified by:

run in class AbstractPollingReporter

processMeter

public void processMeter(MetricName name,
                         Metered meter,
                         CsvReporter.Context context)
                  throws java.io.IOException

Description copied from interface: MetricProcessor

Process the given Metered instance.

Specified by:

processMeter in interface MetricProcessor<CsvReporter.Context>

Parameters:

name - the name of the meter

meter - the meter

context - the context of the meter

Throws:

java.io.IOException

processCounter

public void processCounter(MetricName name,
                           Counter counter,
                           CsvReporter.Context context)
                    throws java.io.IOException

Description copied from interface: MetricProcessor

Process the given counter.

Specified by:

processCounter in interface MetricProcessor<CsvReporter.Context>

Parameters:

name - the name of the counter

counter - the counter

context - the context of the meter

Throws:

java.io.IOException

processHistogram

public void processHistogram(MetricName name,
                             Histogram histogram,
                             CsvReporter.Context context)
                      throws java.io.IOException

Description copied from interface: MetricProcessor

Process the given histogram.

Specified by:

processHistogram in interface MetricProcessor<CsvReporter.Context>

Parameters:

name - the name of the histogram

histogram - the histogram

context - the context of the meter

Throws:

java.io.IOException

processTimer

public void processTimer(MetricName name,
                         Timer timer,
                         CsvReporter.Context context)
                  throws java.io.IOException

Description copied from interface: MetricProcessor

Process the given timer.

Specified by:

processTimer in interface MetricProcessor<CsvReporter.Context>

Parameters:

name - the name of the timer

timer - the timer

context - the context of the meter

Throws:

java.io.IOException

processGauge

public void processGauge(MetricName name,
                         Gauge<?> gauge,
                         CsvReporter.Context context)
                  throws java.io.IOException

Description copied from interface: MetricProcessor

Process the given gauge.

Specified by:

processGauge in interface MetricProcessor<CsvReporter.Context>

Parameters:

name - the name of the gauge

gauge - the gauge

context - the context of the meter

Throws:

java.io.IOException

start

public void start(long period,
                  java.util.concurrent.TimeUnit unit)

Description copied from class: AbstractPollingReporter

Starts the reporter polling at the given period.

Overrides:

start in class AbstractPollingReporter

Parameters:

period - the amount of time between polls

unit - the unit for period

shutdown

public void shutdown()

Description copied from class: AbstractReporter

Stops the reporter and closes any internal resources.

Overrides:

shutdown in class AbstractPollingReporter