Class: MetricsMonitor::Agent

Inherits:
Object
  • Object
show all
Defined in:
lib/metrics_monitor/agent.rb

Constant Summary collapse

HEADER_ALLOW_ORIGIN = 
"Access-Control-Allow-Origin"

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Agent

Returns a new instance of Agent.



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# File 'lib/metrics_monitor/agent.rb', line 9

def initialize
  @config = MetricsMonitor.config
  @collector = @config.collector

  @logger = Rails.logger

  @server = WEBrick::HTTPServer.new({
      BindAddress: @config.bind,
      Port: @config.port,
  })
  @server.mount_proc("/") do |req, res|
    response_text(res, "ok")
  end
  @server.mount_proc("/metrics") do |req, res|
    metrics = @collector.collect
    response_text(res, JSON.generate(metrics))
  end
  @server.mount_proc("/metrics/meta") do |req, res|
    meta = @collector.meta
    response_text(res, JSON.generate(meta))
  end

  @thread = Thread.new do
    @logger.info "Start MetricsMonitor::Agent #{@config.bind}:#{@config.port}"
    @server.start
  end

  at_exit do
    @server.shutdown
    if @thread.alive?
      @thread.wakeup
      @thread.join
    end
  end
end