Class: Spring::ApplicationManager

Inherits:
Object
  • Object
show all
Defined in:
lib/spring-jruby/impl/fork/application_manager.rb,
lib/spring-jruby/impl/pool/application_manager.rb

Defined Under Namespace

Classes: Worker, WorkerPool

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app_env) ⇒ ApplicationManager

Returns a new instance of ApplicationManager.



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 5

def initialize(app_env)
  @app_env    = app_env
  @spring_env = Env.new
  @mutex      = Mutex.new
  @state      = :running
end

Instance Attribute Details

#child ⇒ Object (readonly)

Returns the value of attribute child.



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 3

def child
  @child
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 3

def pid
  @pid
end

#status ⇒ Object (readonly)

Returns the value of attribute status.



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 3

def status
  @status
end

Instance Method Details

#alive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 34

def alive?
  @pid
end

#restart ⇒ Object 



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 29

def restart
  return if @state == :stopping
  start_child(true)
end

#run(client) ⇒ Object

Returns the name of the screen running the command, or nil if the application process died.



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 59

def run(client)
  with_child do
    child.send_io client
    child.gets or raise Errno::EPIPE
  end

  pid = child.gets.to_i

  unless pid.zero?
    log "got worker pid #{pid}"
    pid
  end
rescue Errno::ECONNRESET, Errno::EPIPE => e
  log "#{e} while reading from child; returning no pid"
  nil
ensure
  client.close
end

#start ⇒ Object 



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 25

def start
  start_child
end

#stop ⇒ Object 



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 78

def stop
  log "stopping"
  @state = :stopping

  if pid
    Process.kill('TERM', pid)
    Process.wait(pid)
  end
rescue Errno::ESRCH, Errno::ECHILD
  # Don't care
end

#synchronize ⇒ Object

We’re not using @mutex.synchronize to avoid the weird “<internal:prelude>:10” line which messes with backtraces in e.g. rspec



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# File 'lib/spring-jruby/impl/fork/application_manager.rb', line 18

def synchronize
  @mutex.lock
  yield
ensure
  @mutex.unlock
end