Class: MonitorType_Process

Inherits:
MonitorType_Threshold show all
Defined in:
lib/MonitorType/Process.rb

Overview

A class for checking if a Process is running in Unix based systems

Instance Method Summary collapse

Methods inherited from MonitorType_Threshold

#check, #initialize, #process

Methods inherited from MonitorType

#alert, #initialize, #process, #run, #teardown

Constructor Details

This class inherits a constructor from MonitorType_Threshold

Instance Method Details

#extractParams ⇒ Object

Extract parameters

Parameters:

  • :process_name (String) —

    THe name of the process to monitor



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# File 'lib/MonitorType/Process.rb', line 12

def extractParams
	if @params[:process_name].nil? then
		string = "*** Process Name parameter missing, process_name\n"
		string = "#{string}*** :process_name => <name of the process to be monitored>"
		raise MonitorTypeParameterMissingError.new(string)
	end
	@process_name = @params[:process_name]

	log "#{@process_name}", "result: #{(@process_name =~ /^(.*\[{1}.+\]{1}.*)$|^(\w+)$/) == 0}"

	unless (@process_name =~ /^(.*\[{1}.+\]{1}.*)$|^(\w+)$/) == 0 then
		string = "*** Process Name parameter doest not match the required pattern, #{@process_name}\n"
		string = "#{string}*** :process_name => <plain string, or a string with one or more characters enclosed in square brackets, i.e. 'foo', '[f]oo' or '[foo]'>"
		raise InvalidProcessNameError.new(string)
	end

	log "*** Min value will be ignored, setting to 1" unless (params[:min].nil? || params[:min] == 0)
	@min = 1

	log "*** Max value will be ignored, setting to nil" unless params[:max].nil?
	@max = nil

	@context_sentence = "Checking that process is running, #{@process_name}"
end

#getValue ⇒ Object 



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# File 'lib/MonitorType/Process.rb', line 49

def getValue
	return `ps aux | grep #{@process_name}`.length
end

#sanitise ⇒ Object 



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# File 'lib/MonitorType/Process.rb', line 44

def sanitise
	#Ensure that the process name contains a single character surrounded by square brackets
	@process_name = @process_name.insert(0,'[').insert(2,']') unless @process_name =~ /^.*\[.+\].*/
end

#setup ⇒ Object 



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# File 'lib/MonitorType/Process.rb', line 37

def setup
	self.sanitise
rescue MonitorTypeExceptionHandled => e
	puts e.message
	abort
end