org.hawkular.agent.prometheus

Class PrometheusMetricsProcessor<T>

java.lang.Object

org.hawkular.agent.prometheus.PrometheusMetricsProcessor<T>

Direct Known Subclasses:

BinaryPrometheusMetricsProcessor, TextPrometheusMetricsProcessor

public abstract class PrometheusMetricsProcessor<T>
extends Object

A processor is responsible for iterating over a collection of metric families found in a specific data format and invoking a walker during the iteration so the metric families can be processed.

Constructor Summary

Constructors

Constructor and Description
PrometheusMetricsProcessor(InputStream inputStream, PrometheusMetricsWalker theWalker)

Method Summary

Modifier and Type	Method and Description
protected abstract MetricFamily	convert(T metricFamily) This method converts the metrics from the specific data format found in the input stream to the common metric format.
protected abstract PrometheusMetricDataParser<T>	createPrometheusMetricDataParser()
protected InputStream	getInputStream()
protected PrometheusMetricsWalker	getWalker()
void	walk() This will iterate over a set of metrics that are produced by the parser and will notify the walker of each metric found.

Methods inherited from class java.lang.Object

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

Constructor Detail

PrometheusMetricsProcessor

public PrometheusMetricsProcessor(InputStream inputStream,
                                  PrometheusMetricsWalker theWalker)

Parameters:

inputStream - where the Prometheus metrics are that the walker will traverse.

theWalker - the actual object that will be notified about the metrics as they are encountered

Method Detail

walk

public void walk()

This will iterate over a set of metrics that are produced by the parser and will notify the walker of each metric found.

getInputStream

protected InputStream getInputStream()

Returns:

the input stream where the metric family data in a specific data format is found

getWalker

protected PrometheusMetricsWalker getWalker()

Returns:

the object that will iterate over the found metric data

createPrometheusMetricDataParser

protected abstract PrometheusMetricDataParser<T> createPrometheusMetricDataParser()

Returns:

a new parser instance that can be used to parse the formatted data found in the input stream.

convert

protected abstract MetricFamily convert(T metricFamily)

This method converts the metrics from the specific data format found in the input stream to the common metric format.

Parameters:

metricFamily - the metric family (and its metrics) that need to be converted

Returns:

the common MetricFamily object