Class: AutomateEm::System

Inherits:
Object
  • Object
show all
Defined in:
lib/automate-em/core/system.rb,
lib/automate-em/interfaces/html5.rb

Constant Summary collapse

@@systems =

system_name => system instance

{:'---GOD---' => self}
@@controllers =

controller_id => system instance

{}
@@logger = 
nil
@@communicator = 
AutomateEm::Communicator.new(self)
@@god_lock = 
Mutex.new
@@socket_server = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#communicator ⇒ Object (readonly)

Returns the value of attribute communicator.



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# File 'lib/automate-em/core/system.rb', line 172

def communicator
  @communicator
end

#controller ⇒ Object (readonly)

Returns the value of attribute controller.



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# File 'lib/automate-em/core/system.rb', line 173

def controller
  @controller
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/automate-em/core/system.rb', line 174

def logger
  @logger
end

#modules ⇒ Object (readonly)

Returns the value of attribute modules.



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# File 'lib/automate-em/core/system.rb', line 171

def modules
  @modules
end

Class Method Details

.[](system) ⇒ Object 



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# File 'lib/automate-em/core/system.rb', line 138

def self.[] (system)
	system = system.to_sym if system.class == String
	@@god_lock.synchronize {
		@@systems[system]
	}
end

.communicator ⇒ Object

def self.systems @@systems end



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# File 'lib/automate-em/core/system.rb', line 134

def self.communicator
	@@communicator
end

.force_load_file(path) ⇒ Object

Allows for system updates on the fly Dangerous (Could be used to add on the fly interfaces)



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# File 'lib/automate-em/core/system.rb', line 110

def self.force_load_file(path)
	load path if File.exists?(path) && File.extname(path) == '.rb'
end

.instance ⇒ Object 



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# File 'lib/automate-em/core/system.rb', line 153

def self.instance
	self
end

.logger ⇒ Object

System Logger



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# File 'lib/automate-em/core/system.rb', line 118

def self.logger
	@@logger
end

.logger=(log) ⇒ Object 



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# File 'lib/automate-em/core/system.rb', line 122

def self.logger=(log)
	@@logger = log
end

.modules ⇒ Object

For access via communicator as a super user



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# File 'lib/automate-em/core/system.rb', line 150

def self.modules
	self
end

.new_system(controller, log_level = Logger::INFO) ⇒ Object 



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# File 'lib/automate-em/core/system.rb', line 12

def self.new_system(controller, log_level = Logger::INFO)
	begin
		if controller.class == Fixnum
			controller = ControlSystem.find(controller)
		elsif controller.class == String
			controller = ControlSystem.where('name = ?', controller).first
		end
		
		if controller.class != ControlSystem
			raise 'invalid controller identifier'
		end
	
		@@god_lock.lock
		if @@controllers[controller.id].nil?
			@@god_lock.unlock
			sys = System.new(controller, log_level)
			if controller.active
				begin
					sys.start(true)			# as this is loading the first time we ignore controller active
				rescue => e
					AutomateEm.print_error(@@logger, e, {
						:message => "Error starting system in new_system, stopping..",
						:level => Logger::ERROR
					})
					begin
						sys.stop
						EM.schedule do
							EM.add_timer(60) do # Attempt a single restart
								EM.defer do
									begin
										sys.start(true)
									rescue => e
										begin
											AutomateEm.print_error(@@logger, e, {
												:message => "Second start attempt failed..",
												:level => Logger::ERROR
											})
											sys.stop
										rescue
										end
									end
								end
							end
						end
					rescue => e
						AutomateEm.print_error(@@logger, e, {
							:message => "Error stopping system after problems starting..",
							:level => Logger::ERROR
						})
					end
				end
			end
		else
			@@god_lock.unlock
		end
	ensure
		ActiveRecord::Base.clear_active_connections!	# Clear any unused connections
	end
end

.reload(dep) ⇒ Object

Reloads a dependency live This is the re-load code function (live bug fixing - removing functions does not work)



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# File 'lib/automate-em/core/system.rb', line 77

def self.reload(dep)
	System.logger.info "reloading dependency: #{dep}"
	
	dep = Dependency.find(dep)
	Modules.load_module(dep)
	
	updated = {}
	dep.devices.select('id').each do |dev|
		begin
			inst = DeviceModule.instance_of(dev.id)
			inst.on_update if (!!!updated[inst]) && inst.respond_to?(:on_update)
		ensure
			updated[inst] = true
		end
	end
	
	updated = {}
	dep.logics.select('id').each do |log|
		begin
			inst = LogicModule.instance_of(log.id)
			inst.on_update if (!!!updated[inst]) && inst.respond_to?(:on_update)
		ensure
			updated[inst] = true
		end
	end
	
	ActiveRecord::Base.clear_active_connections!	# Clear any unused connections
end

.start_websockets ⇒ Object 



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# File 'lib/automate-em/interfaces/html5.rb', line 249

def self.start_websockets
	EM.schedule do
		if @@socket_server.nil?
			@@socket_server = EventMachine::WebSocket.start(:host => "0.0.0.0", :port => 81) do |socket| # , :debug => true
				socket.onopen {
					#
					# This socket represents a connected device
					#
					HTML5Monitor.register(socket)
				}
				
				socket.onmessage { |data|
					#
					# Attach socket here to system
					#	then process commands
					#
					HTML5Monitor.receive(socket, data)
				}
		
				socket.onclose {
					HTML5Monitor.unregister(socket)
				}
				
				socket.onerror { |error|
					if !error.kind_of?(EM::WebSocket::WebSocketError)
						EM.defer do
							AutomateEm.print_error(AutomateEm::System.logger, error, {
								:message => "in html5.rb, onerror : issue with websocket data",
								:level => Logger::ERROR
							})
						end
					else
						EM.defer do
							AutomateEm::System.logger.info "in html5.rb, onerror : invalid handshake received - #{error.inspect}"
						end
					end
				}
			end
		
		end
	end
	EM.defer do
		AutomateEm::System.logger.info 'running HTML5 socket server on port 81'
	end
end

.stop_websockets ⇒ Object 



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# File 'lib/automate-em/interfaces/html5.rb', line 295

def self.stop_websockets
	EM.schedule do
		EventMachine::stop_server(@@socket_server) unless @@socket_server.nil?
		@@socket_server = nil
	end
end

Instance Method Details

#[](mod) ⇒ Object

Module accessor



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# File 'lib/automate-em/core/system.rb', line 166

def [] (mod)
	mod = mod.to_sym if mod.class == String
	@modules[mod].instance
end

#delete ⇒ Object

Unload and then destroy self



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# File 'lib/automate-em/core/system.rb', line 236

def delete
	System.logger.info "deleting #{@controller.name}"
	@sys_lock.synchronize {
		stop_nolock
		
		@@god_lock.synchronize {
			@@systems.delete(@controller.name.to_sym)
			@@controllers.delete(@controller.id)
		}
		
		begin
			@controller.destroy!
		rescue
			# Controller may already be deleted
		end
		@modules = nil
	}
end

#instance ⇒ Object 



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# File 'lib/automate-em/core/system.rb', line 156

def instance
	self
end

#log_level(level) ⇒ Object

Log level changing on the fly



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# File 'lib/automate-em/core/system.rb', line 259

def log_level(level)
	@sys_lock.synchronize {
		@log_level = AutomateEm::get_log_level(level)
		if @controller.active
			@logger.level = @log_level
		end
	}
end

#start(force = false) ⇒ Object

Starts the control system if not running



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# File 'lib/automate-em/core/system.rb', line 181

def start(force = false)
	System.logger.info "starting #{@controller.name}"
	@sys_lock.synchronize {
		@@god_lock.synchronize {
			@@systems.delete(@controller.name.to_sym)
			@controller.reload #(:lock => true)
			@@systems[@controller.name.to_sym] = self
		}
		
		if !@controller.active || force
			if @logger.nil?
				if Rails.env.production?
					@logger = Logger.new(Rails.root.join("log/system_#{@controller.id}.log").to_s, 10, 4194304)
				else
					@logger = Logger.new(STDOUT)
				end
				@logger.formatter = proc { |severity, datetime, progname, msg|
					"#{datetime.strftime("%d/%m/%Y @ %I:%M%p")} #{severity}: #{@controller.name} - #{msg}\n"
				}
			end
			
			@controller.devices.includes(:dependency).each do |device|
				load_hooks(device, DeviceModule.new(self, device))
			end
			
			@controller.services.includes(:dependency).each do |service|
				load_hooks(service, ServiceModule.new(self, service))
			end
		
			@controller.logics.includes(:dependency).each do |logic|
				load_hooks(logic, LogicModule.new(self, logic))
			end
		end
		
		@controller.active = true
		@controller.save
		
		@communicator.start
	}
end

#stop ⇒ Object

Stops the current control system Loops through the module instances.



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# File 'lib/automate-em/core/system.rb', line 226

def stop
	System.logger.info "stopping #{@controller.name}"
	@sys_lock.synchronize {
		stop_nolock
	}
end