Class: DecisionAgent::Monitoring::DashboardServer

Inherits:
Object
  • Object
show all
Defined in:
lib/decision_agent/monitoring/dashboard_server.rb

Overview

Real-time monitoring dashboard server Framework-agnostic: Pure Rack application compatible with any Rack server

Constant Summary collapse

PUBLIC_FOLDER = 
File.expand_path("dashboard/public", __dir__)
VIEWS_FOLDER = 
File.expand_path("dashboard/views", __dir__)

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.alert_manager ⇒ Object

Returns the value of attribute alert_manager.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def alert_manager
  @alert_manager
end

.bind ⇒ Object

Returns the value of attribute bind.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def bind
  @bind
end

.metrics_collector ⇒ Object

Returns the value of attribute metrics_collector.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def metrics_collector
  @metrics_collector
end

.port ⇒ Object

Returns the value of attribute port.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def port
  @port
end

.prometheus_exporter ⇒ Object

Returns the value of attribute prometheus_exporter.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def prometheus_exporter
  @prometheus_exporter
end

.public_folder ⇒ Object

Returns the value of attribute public_folder.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def public_folder
  @public_folder
end

.views_folder ⇒ Object

Returns the value of attribute views_folder.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 27

def views_folder
  @views_folder
end

.websocket_clients ⇒ Object (readonly)

Returns the value of attribute websocket_clients.



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 28

def websocket_clients
  @websocket_clients
end

Class Method Details

.add_websocket_client(ws) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 377

def add_websocket_client(ws)
  @websocket_clients ||= []
  @websocket_clients << ws
end

.broadcast_to_clients(message) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 365

def broadcast_to_clients(message)
  return unless WEBSOCKET_AVAILABLE
  return if @websocket_clients.empty? # Skip if no clients connected

  json_message = message.to_json
  @websocket_clients.each do |client|
    client.send(json_message) if client.ready_state == Faye::WebSocket::API::OPEN
  rescue StandardError => e
    warn "WebSocket send failed: #{e.message}"
  end
end

.call(env) ⇒ Object

Rack call method - entry point for Rack requests



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 39

def call(env)
  new.call(env)
end

.configure_monitoring(metrics_collector:, prometheus_exporter:, alert_manager:) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 335

def configure_monitoring(metrics_collector:, prometheus_exporter:, alert_manager:)
  @metrics_collector = metrics_collector
  @prometheus_exporter = prometheus_exporter
  @alert_manager = alert_manager
  @websocket_clients = []

  setup_real_time_updates
end

.define_routes(router) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 43

def define_routes(router)
  # Enable CORS
  router.before do |ctx|
    ctx.headers["Access-Control-Allow-Origin"] = "*"
    ctx.headers["Access-Control-Allow-Methods"] = "GET, POST, PUT, DELETE, OPTIONS"
    ctx.headers["Access-Control-Allow-Headers"] = "Content-Type"
  end

  # OPTIONS handler for CORS preflight
  router.options "*" do |ctx|
    ctx.status(200)
    ctx.body("")
  end

  # Class-level configuration
  class << self
    attr_accessor :metrics_collector, :prometheus_exporter, :alert_manager
    attr_reader :websocket_clients

    def configure_monitoring(metrics_collector:, prometheus_exporter:, alert_manager:)
      @metrics_collector = metrics_collector
      @prometheus_exporter = prometheus_exporter
      @alert_manager = alert_manager
      @websocket_clients = []

      setup_real_time_updates
    end

    def setup_real_time_updates
      # Register observer for real-time metric updates
      @metrics_collector.add_observer do |event_type, metric|
        broadcast_to_clients({
                               type: "metric_update",
                               event: event_type,
                               data: metric,
                               timestamp: Time.now.utc.iso8601
                             })
      end

      # Register alert handler
      @alert_manager.add_handler do |alert|
        broadcast_to_clients({
                               type: "alert",
                               data: alert,
                               timestamp: Time.now.utc.iso8601
                             })
      end
    end

    def broadcast_to_clients(message)
      return unless WEBSOCKET_AVAILABLE
      return if @websocket_clients.empty? # Skip if no clients connected

      json_message = message.to_json
      @websocket_clients.each do |client|
        client.send(json_message) if client.ready_state == Faye::WebSocket::API::OPEN
      rescue StandardError => e
        warn "WebSocket send failed: #{e.message}"
      end
    end

    def add_websocket_client(ws)
      @websocket_clients << ws
    end

    def remove_websocket_client(ws)
      @websocket_clients.delete(ws)
    end
  end

  # Main dashboard page
  router.get "/" do |ctx|
    index_file = File.join(DashboardServer.public_folder || PUBLIC_FOLDER, "index.html")
    if File.exist?(index_file)
      ctx.send_file(index_file)
    else
      ctx.status(404)
      ctx.body("Dashboard page not found")
    end
  end

  # WebSocket endpoint for real-time updates
  router.get "/ws" do |ctx|
    unless WEBSOCKET_AVAILABLE
      ctx.status(503)
      ctx.content_type "application/json"
      ctx.json({ error: "WebSocket support not available. Install faye-websocket gem." })
      next
    end

    if Faye::WebSocket.websocket?(ctx.env)
      ws = Faye::WebSocket.new(ctx.env)

      ws.on :open do |_event|
        DashboardServer.add_websocket_client(ws)

        # Send initial state
        ws.send({
          type: "connected",
          message: "Connected to DecisionAgent monitoring",
          timestamp: Time.now.utc.iso8601
        }.to_json)
      end

      ws.on :message do |event|
        # Handle client messages
        DashboardServer.handle_websocket_message(ws, event.data)
      end

      ws.on :close do |_event|
        DashboardServer.remove_websocket_client(ws)
      end

      ws.rack_response
    else
      ctx.status(426)
      ctx.content_type "application/json"
      ctx.json({ error: "WebSocket connection required" })
    end
  end

  # API: Get current statistics
  router.get "/api/stats" do |ctx|
    ctx.content_type "application/json"

    time_range = (ctx.params[:time_range] || ctx.params["time_range"])&.to_i
    stats = DashboardServer.metrics_collector.statistics(time_range: time_range)

    ctx.json(stats)
  end

  # API: Get time series data
  router.get "/api/timeseries/:metric_type" do |ctx|
    ctx.content_type "application/json"

    metric_type = (ctx.params[:metric_type] || ctx.params["metric_type"]).to_sym
    bucket_size = ((ctx.params[:bucket_size] || ctx.params["bucket_size"]) || 60).to_i
    time_range = ((ctx.params[:time_range] || ctx.params["time_range"]) || 3600).to_i

    data = DashboardServer.metrics_collector.time_series(
      metric_type: metric_type,
      bucket_size: bucket_size,
      time_range: time_range
    )

    ctx.json(data)
  end

  # API: Prometheus metrics endpoint
  router.get "/metrics" do |ctx|
    ctx.content_type DashboardServer.prometheus_exporter.class::CONTENT_TYPE
    ctx.body(DashboardServer.prometheus_exporter.export)
  end

  # API: Get Prometheus metrics in JSON format
  router.get "/api/metrics" do |ctx|
    ctx.content_type "application/json"
    ctx.json(DashboardServer.prometheus_exporter.metrics_hash)
  end

  # API: Register custom KPI
  router.post "/api/kpi" do |ctx|
    ctx.content_type "application/json"

    begin
      request_body = Web::RackRequestHelpers.read_body(ctx.env)
      data = JSON.parse(request_body, symbolize_names: true)

      DashboardServer.prometheus_exporter.register_kpi(
        name: data[:name],
        value: data[:value],
        labels: data[:labels] || {},
        help: data[:help]
      )

      ctx.json({ success: true, message: "KPI registered" })
    rescue StandardError => e
      ctx.status(400)
      ctx.json({ error: e.message })
    end
  end

  # API: Get active alerts
  router.get "/api/alerts" do |ctx|
    ctx.content_type "application/json"
    ctx.json(DashboardServer.alert_manager.active_alerts)
  end

  # API: Get all alerts
  router.get "/api/alerts/all" do |ctx|
    ctx.content_type "application/json"
    limit = ((ctx.params[:limit] || ctx.params["limit"]) || 100).to_i
    ctx.json(DashboardServer.alert_manager.all_alerts(limit: limit))
  end

  # API: Create alert rule
  router.post "/api/alerts/rules" do |ctx|
    ctx.content_type "application/json"

    begin
      request_body = Web::RackRequestHelpers.read_body(ctx.env)
      data = JSON.parse(request_body, symbolize_names: true)

      # Parse condition
      condition = DashboardServer.parse_alert_condition(data[:condition], data[:condition_type])

      rule = DashboardServer.alert_manager.add_rule(
        name: data[:name],
        condition: condition,
        severity: (data[:severity] || :warning).to_sym,
        threshold: data[:threshold],
        message: data[:message],
        cooldown: data[:cooldown] || 300
      )

      ctx.status(201)
      ctx.json(rule)
    rescue StandardError => e
      ctx.status(400)
      ctx.json({ error: e.message })
    end
  end

  # API: Toggle alert rule
  router.put "/api/alerts/rules/:rule_id/toggle" do |ctx|
    ctx.content_type "application/json"

    begin
      request_body = Web::RackRequestHelpers.read_body(ctx.env)
      data = JSON.parse(request_body, symbolize_names: true)
      enabled = data[:enabled] || false
      rule_id = ctx.params[:rule_id] || ctx.params["rule_id"]

      DashboardServer.alert_manager.toggle_rule(rule_id, enabled)

      ctx.json({ success: true, message: "Rule #{enabled ? 'enabled' : 'disabled'}" })
    rescue StandardError => e
      ctx.status(400)
      ctx.json({ error: e.message })
    end
  end

  # API: Acknowledge alert
  router.post "/api/alerts/:alert_id/acknowledge" do |ctx|
    ctx.content_type "application/json"

    begin
      request_body = Web::RackRequestHelpers.read_body(ctx.env)
      data = JSON.parse(request_body, symbolize_names: true)
      acknowledged_by = data[:acknowledged_by] || "user"
      alert_id = ctx.params[:alert_id] || ctx.params["alert_id"]

      DashboardServer.alert_manager.acknowledge_alert(alert_id, acknowledged_by: acknowledged_by)

      ctx.json({ success: true, message: "Alert acknowledged" })
    rescue StandardError => e
      ctx.status(400)
      ctx.json({ error: e.message })
    end
  end

  # API: Resolve alert
  router.post "/api/alerts/:alert_id/resolve" do |ctx|
    ctx.content_type "application/json"

    begin
      request_body = Web::RackRequestHelpers.read_body(ctx.env)
      data = JSON.parse(request_body, symbolize_names: true)
      resolved_by = data[:resolved_by] || "user"
      alert_id = ctx.params[:alert_id] || ctx.params["alert_id"]

      DashboardServer.alert_manager.resolve_alert(alert_id, resolved_by: resolved_by)

      ctx.json({ success: true, message: "Alert resolved" })
    rescue StandardError => e
      ctx.status(400)
      ctx.json({ error: e.message })
    end
  end

  # Health check
  router.get "/health" do |ctx|
    ctx.content_type "application/json"
    ctx.json({
               status: "ok",
               version: DecisionAgent::VERSION,
               websocket_clients: DashboardServer.websocket_clients.size,
               metrics_count: DashboardServer.metrics_collector.metrics_count
             })
  end
end

.handle_websocket_message(ws, data) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 387

def handle_websocket_message(ws, data)
  message = JSON.parse(data, symbolize_names: true)

  case message[:action]
  when "subscribe"
    # Send current stats
    stats = metrics_collector.statistics
    ws.send({ type: "stats", data: stats }.to_json)
  when "get_alerts"
    alerts = alert_manager.active_alerts
    ws.send({ type: "alerts", data: alerts }.to_json)
  end
rescue StandardError => e
  ws.send({ type: "error", message: e.message }.to_json)
end

.parse_alert_condition(condition_data, condition_type) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 403

def parse_alert_condition(condition_data, condition_type)
  case condition_type
  when "high_error_rate"
    AlertManager.high_error_rate(threshold: condition_data[:threshold] || 0.1)
  when "low_confidence"
    AlertManager.low_confidence(threshold: condition_data[:threshold] || 0.5)
  when "high_latency"
    AlertManager.high_latency(threshold_ms: condition_data[:threshold_ms] || 1000)
  when "error_spike"
    AlertManager.error_spike(threshold: condition_data[:threshold] || 10)
  when "custom"
    condition_data
  else
    raise "Unknown condition type: #{condition_type}"
  end
end

.remove_websocket_client(ws) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 382

def remove_websocket_client(ws)
  @websocket_clients ||= []
  @websocket_clients.delete(ws)
end

.router ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 30

def router
  @router ||= begin
    router = Web::RackHelpers::Router.new
    define_routes(router)
    router
  end
end

.setup_real_time_updates ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 344

def setup_real_time_updates
  # Register observer for real-time metric updates
  @metrics_collector.add_observer do |event_type, metric|
    broadcast_to_clients({
                           type: "metric_update",
                           event: event_type,
                           data: metric,
                           timestamp: Time.now.utc.iso8601
                         })
  end

  # Register alert handler
  @alert_manager.add_handler do |alert|
    broadcast_to_clients({
                           type: "alert",
                           data: alert,
                           timestamp: Time.now.utc.iso8601
                         })
  end
end

.start!(metrics_collector:, prometheus_exporter:, alert_manager:, port: 4568, host: "0.0.0.0") ⇒ Object

Class method to start the server Framework-agnostic: uses Rack::Server which supports any Rack-compatible server



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 422

def start!(metrics_collector:, prometheus_exporter:, alert_manager:, port: 4568, host: "0.0.0.0")
  configure_monitoring(
    metrics_collector: metrics_collector,
    prometheus_exporter: prometheus_exporter,
    alert_manager: alert_manager
  )

  @port = port
  @bind = host
  @public_folder = PUBLIC_FOLDER
  @views_folder = VIEWS_FOLDER

  puts "🎯 DecisionAgent Monitoring Dashboard starting..."
  puts "📍 Server: http://#{host == '0.0.0.0' ? 'localhost' : host}:#{port}"
  puts "⚡️  Press Ctrl+C to stop"
  puts ""

  # Use Rack::Server which automatically selects the best available handler
  # Supports: Puma, WEBrick, Thin, Unicorn, etc. (any Rack-compatible server)
  Rack::Server.start(
    app: self,
    Port: port,
    Host: host,
    server: ENV.fetch("RACK_HANDLER", nil), # Allows override via ENV
    environment: ENV.fetch("RACK_ENV", "development")
  )
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/decision_agent/monitoring/dashboard_server.rb', line 451

def call(env)
  route_match = DashboardServer.router.match(env)
  return [404, { "Content-Type" => "text/plain" }, ["Not Found"]] unless route_match

  # Create request context with route params
  ctx = Web::RackRequestHelpers::RequestContext.new(env, route_match[:params] || {})

  # Run before filters
  route_match[:before_filters].each do |filter|
    filter.call(ctx)
    return ctx.to_rack_response if ctx.halted?
  end

  # Execute route handler
  begin
    route_match[:handler].call(ctx)
    ctx.to_rack_response
  rescue StandardError => e
    [500, { "Content-Type" => "application/json" }, [{ error: e.message }.to_json]]
  end
end