Class: ActiveJob::Temporal::MetricsServer

Inherits:
Object
  • Object
show all
Includes:
HttpLineReader, HttpRequestFailureHandling
Defined in:
lib/activejob/temporal/metrics_server.rb

Constant Summary collapse

DEFAULT_BIND_ADDRESS = 
"127.0.0.1"
READ_TIMEOUT_SECONDS = 
1
CONTENT_TYPE = 
"text/plain; version=0.0.4"
CONNECTION_WORKERS = 
4
CONNECTION_QUEUE_SIZE = 
16
REQUEST_FAILURE_EVENT = 
"metrics_request_failed"
REQUEST_FAILURE_FORMAT = 
:text

Constants included from HttpLineReader

HttpLineReader::MAX_HEADER_LINES, HttpLineReader::MAX_LINE_BYTES

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port:, provider:, bind_address: DEFAULT_BIND_ADDRESS, allow_public_bind: false) ⇒ MetricsServer

Returns a new instance of MetricsServer.



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# File 'lib/activejob/temporal/metrics_server.rb', line 27

def initialize(port:, provider:, bind_address: DEFAULT_BIND_ADDRESS, allow_public_bind: false)
  @requested_port = Integer(port)
  @bind_address = bind_address
  @allow_public_bind = allow_public_bind
  @provider = provider
  @running = false
  @mutex = Mutex.new
end

Instance Attribute Details

#bind_address ⇒ Object (readonly)

Returns the value of attribute bind_address.



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# File 'lib/activejob/temporal/metrics_server.rb', line 25

def bind_address
  @bind_address
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/activejob/temporal/metrics_server.rb', line 25

def port
  @port
end

Instance Method Details

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/activejob/temporal/metrics_server.rb', line 79

def running?
  @mutex.synchronize { @running }
end

#start ⇒ Object 



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# File 'lib/activejob/temporal/metrics_server.rb', line 36

def start
  @mutex.synchronize do
    return self if @running

    BindPolicy.validate!(
      endpoint: "metrics",
      bind_address: bind_address,
      allow_public_bind: @allow_public_bind
    )
    @server = TCPServer.new(bind_address, @requested_port)
    @port = @server.addr[1]
    @connection_pool = ConnectionWorkerPool.new(
      size: CONNECTION_WORKERS,
      queue_size: CONNECTION_QUEUE_SIZE,
      name: "activejob-temporal-metrics"
    ) { |client| serve_client(client) }.start
    @running = true
    @thread = Thread.new { run }
  end

  self
end

#stop ⇒ Object 



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# File 'lib/activejob/temporal/metrics_server.rb', line 59

def stop
  server = nil
  thread = nil
  connection_pool = nil

  @mutex.synchronize do
    server = @server
    thread = @thread
    connection_pool = @connection_pool
    @server = nil
    @thread = nil
    @connection_pool = nil
    @running = false
  end

  server&.close
  connection_pool&.stop(timeout: 2)
  thread&.join(2)
end