Module: Arborist::CLI::Start

Extended by:
Subcommand
Defined in:
lib/arborist/command/start.rb

Overview

Command to start a Arborist daemon

Constant Summary collapse

VALID_DAEMONS = 
%w[
	manager
	monitors
	observers
]

Class Method Summary collapse

Methods included from Subcommand

display_table, error_string, exit_now!, extended, headline_string, help_now!, highlight_string, hl, prompt, skips_around, skips_post, skips_pre, success_string, unless_dryrun, visible_chars

Class Method Details

.default_profile_filename(mode, runner) ⇒ Object

Return a filename for a StackProf profile run over the given runner.



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# File 'lib/arborist/command/start.rb', line 104

def self::default_profile_filename( mode, runner )
	basename = runner.class.name.gsub( /.*::/, '' )
	return "%s-%s-%s.%d.dump" % [
		basename,
		mode,
		Time.now.strftime('%Y%m%d%H%M%S'),
		Process.pid,
	]
end

.parse_profile_args(arg, runner) ⇒ Object

Set up the StackProf profiler to run in the given mode.



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# File 'lib/arborist/command/start.rb', line 95

def self::parse_profile_args( arg, runner )
	profile_mode, profile_filename = arg.split( ':', 2 )
	profile_filename ||= self.default_profile_filename( profile_mode, runner )

	return profile_mode, profile_filename
end

.start(runner, profile_mode = nil) ⇒ Object

Start the specified runner instance after setting up the environment for it.



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# File 'lib/arborist/command/start.rb', line 68

def start( runner, profile_mode=nil )
	Process.setproctitle( runner.class.name )

	if profile_mode
		self.with_profiling_enabled( profile_mode, runner ) do
			runner.run
		end
	else
		runner.run
	end
end

.with_profiling_enabled(profile_arg, runner, &block) ⇒ Object

Wrap the profiler around the specified callable.



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# File 'lib/arborist/command/start.rb', line 82

def self::with_profiling_enabled( profile_arg, runner, &block )
	require 'stackprof'
	mode, outfile = self.parse_profile_args( profile_arg, runner )

	self.log.info "Profiling in %s mode, outputting to %s" % [ mode, outfile ]
	StackProf.run( mode: mode.to_sym, out: outfile, &block )
rescue LoadError => err
	self.log.debug "%p while loading the StackProf profiler: %s"
	exit_now!( "Couldn't load the profiler; you probably need to `gem install stackprof`", 254 )
end