Class: Trinidad::Lifecycle::Host

Inherits:
Object
  • Object
show all
Includes:
Tomcat::LifecycleListener
Defined in:
lib/trinidad/lifecycle/lifecycle_listener_host.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tomcat, *contexts) ⇒ Host

Returns a new instance of Host.



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 9

def initialize(tomcat, *contexts)
  @tomcat = tomcat
  @contexts = contexts
end

Instance Attribute Details

#contexts ⇒ Object (readonly)

Returns the value of attribute contexts.



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 7

def contexts
  @contexts
end

Instance Method Details

#check_monitors ⇒ Object 



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 39

def check_monitors
  @contexts.each do |c|
    # double check monitor, capistrano removes it temporarily
    sleep(0.5) unless File.exist?(c[:monitor])
    next unless File.exist?(c[:monitor])

    if (mtime = File.mtime(c[:monitor])) > c[:mtime] && !c[:lock]
      c[:lock] = true
      c[:mtime] = mtime
      c[:context] = create_takeover(c)
      Thread.new { c[:context].start }
    end
  end
end

#create_takeover(c) ⇒ Object 



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 54

def create_takeover(c)
  web_app = c[:app]
  old_context = c[:context]

  context = Trinidad::Tomcat::StandardContext.new
  context.name = rand.to_s
  context.path = old_context.path
  context.doc_base = web_app.web_app_dir

  context.add_lifecycle_listener Trinidad::Tomcat::Tomcat::DefaultWebXmlListener.new

  config = Trinidad::Tomcat::ContextConfig.new
  config.default_web_xml = 'org/apache/catalina/startup/NO_DEFAULT_XML'
  context.add_lifecycle_listener config

  Trinidad::Extensions.configure_webapp_extensions(web_app.extensions, @tomcat, context)

  web_app.generate_class_loader
  context.add_lifecycle_listener(web_app.define_lifecycle)
  context.add_lifecycle_listener(Trinidad::Lifecycle::Takeover.new(c))

  old_context.parent.add_child context

  context
end

#init_monitors ⇒ Object 



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 25

def init_monitors
  @contexts.each do |c|
    monitor = c[:monitor]
    opts = File.exist?(monitor) ? 'r' : 'w+'

    unless File.exist?(dir = File.dirname(monitor))
      Dir.mkdir dir
    end

    file = File.new(monitor, opts)
    c[:mtime] = file.mtime
  end
end

#lifecycleEvent(event) ⇒ Object 



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# File 'lib/trinidad/lifecycle/lifecycle_listener_host.rb', line 14

def lifecycleEvent(event)
  host = event.lifecycle

  case event.type
  when Trinidad::Tomcat::Lifecycle::BEFORE_START_EVENT
    init_monitors
  when Trinidad::Tomcat::Lifecycle::PERIODIC_EVENT
    check_monitors
  end
end