Class: DecisionAgent::Monitoring::PrometheusExporter

Inherits:
Object
  • Object
show all
Includes:
MonitorMixin
Defined in:
lib/decision_agent/monitoring/prometheus_exporter.rb

Overview

Prometheus-compatible metrics exporter

Constant Summary collapse

CONTENT_TYPE = 
"text/plain; version=0.0.4"

Instance Method Summary collapse

Constructor Details

#initialize(metrics_collector:, namespace: "decision_agent") ⇒ PrometheusExporter

Returns a new instance of PrometheusExporter.



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# File 'lib/decision_agent/monitoring/prometheus_exporter.rb', line 13

def initialize(metrics_collector:, namespace: "decision_agent")
  super()
  @metrics_collector = metrics_collector
  @namespace = namespace
  @custom_metrics = {}
  freeze_config
end

Instance Method Details

#export ⇒ Object

Export metrics in Prometheus format



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# File 'lib/decision_agent/monitoring/prometheus_exporter.rb', line 22

def export
  synchronize do
    lines = []

    # Add header
    lines << "# DecisionAgent Metrics Export"
    lines << "# Timestamp: #{Time.now.utc.iso8601}"
    lines << ""

    # Decision metrics
    lines.concat(export_decision_metrics)

    # Performance metrics
    lines.concat(export_performance_metrics)

    # Error metrics
    lines.concat(export_error_metrics)

    # Custom KPI metrics
    lines.concat(export_custom_metrics)

    # System info
    lines.concat(export_system_metrics)

    lines.join("\n")
  end
end

#metrics_hash ⇒ Object

Get metrics in hash format



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# File 'lib/decision_agent/monitoring/prometheus_exporter.rb', line 64

def metrics_hash
  synchronize do
    stats = @metrics_collector.statistics

    {
      decisions: {
        total: counter_metric("decisions_total", stats.dig(:decisions, :total) || 0),
        avg_confidence: gauge_metric("decision_confidence_avg", stats.dig(:decisions, :avg_confidence) || 0),
        avg_duration_ms: gauge_metric("decision_duration_ms_avg", stats.dig(:decisions, :avg_duration_ms) || 0)
      },
      performance: {
        success_rate: gauge_metric("success_rate", stats.dig(:performance, :success_rate) || 0),
        avg_duration_ms: gauge_metric("operation_duration_ms_avg",
                                      stats.dig(:performance, :avg_duration_ms) || 0),
        p95_duration_ms: gauge_metric("operation_duration_ms_p95",
                                      stats.dig(:performance, :p95_duration_ms) || 0),
        p99_duration_ms: gauge_metric("operation_duration_ms_p99", stats.dig(:performance, :p99_duration_ms) || 0)
      },
      errors: {
        total: counter_metric("errors_total", stats.dig(:errors, :total) || 0)
      },
      system: {
        version: info_metric("version", DecisionAgent::VERSION)
      }
    }
  end
end

#register_kpi(name:, value:, labels: {}, help: nil) ⇒ Object

Register custom KPI



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# File 'lib/decision_agent/monitoring/prometheus_exporter.rb', line 51

def register_kpi(name:, value:, labels: {}, help: nil)
  synchronize do
    metric_name = sanitize_name(name)
    @custom_metrics[metric_name] = {
      value: value,
      labels: labels,
      help: help || "Custom KPI: #{name}",
      timestamp: Time.now.utc
    }
  end
end