Class: Puppet::Network::HTTP::Pool Private

Inherits:
BasePool show all
Defined in:
lib/puppet/network/http/pool.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

A pool for persistent Net::HTTP connections. Connections are stored in the pool indexed by their Site. Connections are borrowed from the pool, yielded to the caller, and released back into the pool. If a connection is expired, it will be closed either when a connection to that site is requested, or when the pool is closed. The pool can store multiple connections to the same site, and will be reused in MRU order.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BasePool

#start

Constructor Details

#initialize(keepalive_timeout) ⇒ Pool

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Pool.


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# File 'lib/puppet/network/http/pool.rb', line 14

def initialize(keepalive_timeout)
  @pool = {}
  @factory = Puppet::Network::HTTP::Factory.new
  @keepalive_timeout = keepalive_timeout
end

Instance Attribute Details

#factoryObject (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/puppet/network/http/pool.rb', line 12

def factory
  @factory
end

#keepalive_timeoutObject (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/puppet/network/http/pool.rb', line 12

def keepalive_timeout
  @keepalive_timeout
end

Instance Method Details

#active_sessions(site) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns an Array of sessions whose connections are not expired.


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# File 'lib/puppet/network/http/pool.rb', line 124

def active_sessions(site)
  now = Time.now

  sessions = @pool[site] || []
  sessions.select do |session|
    if session.expired?(now)
      close_connection(site, session.connection)
      false
    else
      true
    end
  end
end

#borrow(site, verifier) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Borrow and take ownership of a persistent connection. If a new connection is created, it will be started prior to being returned.


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# File 'lib/puppet/network/http/pool.rb', line 74

def borrow(site, verifier)
  @pool[site] = active_sessions(site)
  index = @pool[site].index do |session|
    (verifier.nil? && session.verifier.nil?) ||
      (!verifier.nil? && verifier.reusable?(session.verifier))
  end
  session = index ? @pool[site].delete_at(index) : nil
  if session
    @pool.delete(site) if @pool[site].empty?

    Puppet.debug("Using cached connection for #{site}")
    session.connection
  else
    http = @factory.create_connection(site)

    start(site, verifier, http)
    setsockopts(http.instance_variable_get(:@socket))
    http
  end
end

#closeObject

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/puppet/network/http/pool.rb', line 42

def close
  @pool.each_pair do |site, sessions|
    sessions.each do |session|
      close_connection(site, session.connection)
    end
  end
  @pool.clear
end

#close_connection(site, http) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Safely close a persistent connection. Don't try to close a connection that's already closed.


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# File 'lib/puppet/network/http/pool.rb', line 60

def close_connection(site, http)
  return false unless http.started?
  Puppet.debug("Closing connection for #{site}")
  http.finish
  true
rescue => detail
  Puppet.log_exception(detail, _("Failed to close connection for %{site}: %{detail}") % { site: site, detail: detail })
  nil
end

#poolObject

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/puppet/network/http/pool.rb', line 52

def pool
  @pool
end

#release(site, verifier, http) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Release a connection back into the pool.


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# File 'lib/puppet/network/http/pool.rb', line 108

def release(site, verifier, http)
  expiration = Time.now + @keepalive_timeout
  session = Puppet::Network::HTTP::Session.new(http, verifier, expiration)
  Puppet.debug("Caching connection for #{site}")

  sessions = @pool[site]
  if sessions
    sessions.unshift(session)
  else
    @pool[site] = [session]
  end
end

#setsockopts(netio) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Set useful socket option(s) which lack from default settings in Net:HTTP


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# File 'lib/puppet/network/http/pool.rb', line 98

def setsockopts(netio)
  return unless netio

  socket = netio.io
  socket.setsockopt(Socket::SOL_SOCKET, Socket::SO_KEEPALIVE, true)
end

#with_connection(site, verifier, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.


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# File 'lib/puppet/network/http/pool.rb', line 20

def with_connection(site, verifier, &block)
  reuse = true

  http = borrow(site, verifier)
  begin
    if http.use_ssl? && http.verify_mode != OpenSSL::SSL::VERIFY_PEER
      reuse = false
    end

    yield http
  rescue => detail
    reuse = false
    raise detail
  ensure
    if reuse && http.started?
      release(site, verifier, http)
    else
      close_connection(site, http)
    end
  end
end