Package de.cuioss.benchmarking.common.metrics

Class PrometheusClient

java.lang.Object

de.cuioss.benchmarking.common.metrics.PrometheusClient

public class PrometheusClient
extends Object

HTTP client for querying Prometheus API endpoints. Supports query_range operations for time-series data retrieval during benchmark execution.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	PrometheusClient.DataPoint	Represents a single data point in time-series data.
static class	PrometheusClient.PrometheusException	Exception thrown when Prometheus operations fail.
static final record	PrometheusClient.TimeSeries	Represents time-series data for a metric.

Constructor Summary

Constructors

Constructor	Description
PrometheusClient(String prometheusUrl)	Creates a new Prometheus client with default timeout.
PrometheusClient(String prometheusUrl, Duration timeout)	Creates a new Prometheus client with custom timeout.

Method Summary

Modifier and Type	Method	Description
Map<String,PrometheusClient.TimeSeries>	queryRange(List<String> metricNames, Instant startTime, Instant endTime, Duration step)	Query Prometheus for time-series data in a specific time range.

Methods inherited from class java.lang.Object

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

Constructor Details

PrometheusClient

public PrometheusClient(String prometheusUrl)

Creates a new Prometheus client with default timeout.

Parameters:

prometheusUrl - Base URL of Prometheus server (e.g., http://localhost:9090)

PrometheusClient

public PrometheusClient(String prometheusUrl,
 Duration timeout)

Creates a new Prometheus client with custom timeout.

Parameters:

prometheusUrl - Base URL of Prometheus server

timeout - HTTP request timeout

Method Details

queryRange

public Map<String,PrometheusClient.TimeSeries> queryRange(List<String> metricNames,
 Instant startTime,
 Instant endTime,
 Duration step)
                                                   throws PrometheusClient.PrometheusException

Query Prometheus for time-series data in a specific time range.

Parameters:

metricNames - List of metric names to query

startTime - Start of time range (inclusive)

endTime - End of time range (inclusive)

step - Step size between data points

Returns:

Map of metric name to time series data

Throws:

PrometheusClient.PrometheusException - if query fails or Prometheus unavailable