Class: HTTPX::Pool

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/httpx/pool.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Pool

Returns a new instance of Pool.



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# File 'lib/httpx/pool.rb', line 15

def initialize
  @resolvers = {}
  @timers = Timers.new
  @selector = Selector.new
  @connections = []
end

Instance Method Details

#close(connections = @connections) ⇒ Object 



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# File 'lib/httpx/pool.rb', line 61

def close(connections = @connections)
  return if connections.empty?

  connections = connections.reject(&:inflight?)
  connections.each(&:terminate)
  next_tick until connections.none? { |c| c.state != :idle && @connections.include?(c) }

  # close resolvers
  outstanding_connections = @connections
  resolver_connections = @resolvers.each_value.flat_map(&:connections).compact
  outstanding_connections -= resolver_connections

  return unless outstanding_connections.empty?

  @resolvers.each_value do |resolver|
    resolver.close unless resolver.closed?
  end
  # for https resolver
  resolver_connections.each(&:terminate)
  next_tick until resolver_connections.none? { |c| c.state != :idle && @connections.include?(c) }
end

#deactivate(connections) ⇒ Object 



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# File 'lib/httpx/pool.rb', line 111

def deactivate(connections)
  connections.each do |connection|
    connection.deactivate
    deselect_connection(connection) if connection.state == :inactive
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/httpx/pool.rb', line 33

def empty?
  @connections.empty?
end

#find_connection(uri, options) ⇒ Object

opens a connection to the IP reachable through uri. Many hostnames are reachable through the same IP, so we try to maximize pipelining by opening as few connections as possible.



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# File 'lib/httpx/pool.rb', line 122

def find_connection(uri, options)
  conn = @connections.find do |connection|
    connection.match?(uri, options)
  end

  return unless conn

  case conn.state
  when :closed
    conn.idling
    select_connection(conn)
  when :closing
    conn.once(:close) do
      conn.idling
      select_connection(conn)
    end
  end

  conn
end

#init_connection(connection, _options) ⇒ Object 



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# File 'lib/httpx/pool.rb', line 83

def init_connection(connection, _options)
  connection.timers = @timers
  connection.on(:activate) do
    select_connection(connection)
  end
  connection.on(:exhausted) do
    case connection.state
    when :closed
      connection.idling
      @connections << connection
      select_connection(connection)
    when :closing
      connection.once(:close) do
        connection.idling
        @connections << connection
        select_connection(connection)
      end
    end
  end
  connection.on(:close) do
    unregister_connection(connection)
  end
  connection.on(:terminate) do
    unregister_connection(connection, true)
  end
  resolve_connection(connection) unless connection.family
end

#next_tick ⇒ Object 



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# File 'lib/httpx/pool.rb', line 37

def next_tick
  catch(:jump_tick) do
    timeout = next_timeout
    if timeout && timeout.negative?
      @timers.fire
      throw(:jump_tick)
    end

    begin
      @selector.select(timeout, &:call)
      @timers.fire
    rescue TimeoutError => e
      @timers.fire(e)
    end
  end
rescue StandardError => e
  @connections.each do |connection|
    connection.emit(:error, e)
  end
rescue Exception # rubocop:disable Lint/RescueException
  @connections.each(&:force_reset)
  raise
end

#wrap ⇒ Object 



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# File 'lib/httpx/pool.rb', line 22

def wrap
  connections = @connections
  @connections = []

  begin
    yield self
  ensure
    @connections.unshift(*connections)
  end
end