Module: AgentTasks

Included in:
Instana::Agent
Defined in:
lib/instana/agent/tasks.rb

Constant Summary collapse

OJ_OPTIONS =

When request(s) are received by the host agent, it is sent here for handling & processing.

{mode: :strict}

Instance Method Summary collapse

Instance Method Details

#handle_agent_tasks(json_string) ⇒ Object 



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# File 'lib/instana/agent/tasks.rb', line 10

def handle_agent_tasks(json_string)
  tasks = Oj.load(json_string, OJ_OPTIONS)

  if tasks.is_a?(Hash)
    process_agent_task(tasks)
  elsif tasks.is_a?(Array)
    tasks.each do |t|
      process_agent_task(t)
    end
  end
end

#process_agent_task(task) ⇒ Object

Process a task sent from the host agent.

Parameters:

  • task (String) —

    the request json from the host agent



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# File 'lib/instana/agent/tasks.rb', line 26

def process_agent_task(task)
  if task.key?("action")
    if task["action"] == "ruby.source"
      payload = ::Instana::Util.get_rb_source(task["args"]["file"])
    else
      payload = { :error => "Unrecognized action: #{task["action"]}. An newer Instana gem may be required for this. Current version: #{::Instana::VERSION}" }
    end
  else
    payload = { :error => "Instana Ruby: No action specified in request." }
  end

  path = "com.instana.plugin.ruby/response.#{@process[:report_pid]}?messageId=#{URI.encode(task['messageId'])}"
  uri = URI.parse("http://#{@discovered[:agent_host]}:#{@discovered[:agent_port]}/#{path}")
  req = Net::HTTP::Post.new(uri)
  req.body = Oj.dump(payload, OJ_OPTIONS)
  ::Instana.logger.debug "Responding to agent request: #{req.inspect}"
  make_host_agent_request(req)

rescue StandardError => e
  Instana.logger.debug { "#{__method__}:#{File.basename(__FILE__)}:#{__LINE__}: #{e.message}" }
  Instana.logger.debug { e.backtrace.join("\r\n") }
end