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|
#!/usr/bin/ruby
#
# This script will pull tests to complete from the Beanstalk Queue,
# where they will be found in JSON form, and executes them.
#
#
# TODO: Command line parsing:
#
# 1. set failure count 3 in a row, for example.
#
# 2. enable/disable logging to a file
#
# 3. Specify server name/port for the beanstalk queue.
#
#
# Steve
# --
#
require 'beanstalk-client'
require 'getoptlong'
require 'json'
#
# Implementation of our protocol tests.
#
require 'tests/ftp'
require 'tests/http'
require 'tests/https'
require 'tests/jabber'
require 'tests/ldap'
require 'tests/ping'
require 'tests/rsync'
require 'tests/smtp'
require 'tests/ssh'
#
# This class encapsulates the raising and clearing of alerts via Mauve.
#
class Alert
attr_reader :details
def initialize( test_details )
@details = test_details
end
def raise
puts "RAISING ALERT: #{@details}"
end
def clear
puts "CLEARING ALERT: #{@details}"
end
end
#
# This class contains the code for connecting to a Beanstalk queue,
# fetching tests from it, and executing them
#
class Custodian
#
# The beanstalk queue.
#
attr_reader :queue
#
# Constructor: Connect to the queue
#
def initialize( server )
@queue = Beanstalk::Pool.new([server])
end
#
# Flush the queue.
#
def flush_queue!
while( true )
begin
job = @queue.reserve(1)
id = job.id
puts "\tDeleted job #{id}" if ( ENV['VERBOSE'] )
job.delete
rescue Beanstalk::TimedOut => ex
return
end
end
end
#
# Process jobs from the queue - never return.
#
def run!
while( true )
puts "\n\nWaiting for job.." if ( ENV['VERBOSE'] )
process_single_job()
end
end
#
# Fetch a single job from the queue, and process it.
#
def process_single_job
begin
job = @queue.reserve()
puts "Job acquired: #{Time.new.inspect}" if ( ENV['VERBOSE'] )
#
# Parse the JSON of the job body.
#
json = job.body
hash = JSON.parse( json )
hash['verbose'] = 1 if ( ENV['VERBOSE'] )
#
# Output the details.
#
if ( ENV['VERBOSE'] )
puts "JOB: #{job.id}"
puts "Type of test is #{hash['test_type']}"
hash.keys.each do |key|
puts "\t#{key} => #{hash[key]}"
end
end
#
# Given the test-type of "YYY" we'll call the method "YYY_test", which
# we assume comes from one of the files beneath ./tests/
#
test = hash['test_type']
method = "#{test}_test".to_sym
success = false
count = 0
alert = Alert.new( hash )
#
# We'll run no more than MAX times.
#
# We stop the execution on a single success.
#
while ( ( count < 5 ) && ( success == false ) )
if ( send( method, hash ) )
alert.clear()
success= true
end
count += 1
end
#
# If we didn't succeed on any of the attempts raise the alert.
#
if ( ! success )
alert.raise()
end
rescue => ex
puts "Exception raised processing job: #{ex}"
ensure
#
# Delete the job - either we received an error, in which case
# we should remove it to avoid picking it up again, or we handled
# it successfully so it should be removed.
#
job.delete
end
end
end
#
# Entry-point to our code.
#
if __FILE__ == $0 then
$SERVER = "localhost:11300";
begin
opts = GetoptLong.new(
[ "--verbose", "-v", GetoptLong::NO_ARGUMENT ],
[ "--flush", "-f", GetoptLong::NO_ARGUMENT ],
[ "--server", "-S", GetoptLong::REQUIRED_ARGUMENT ],
[ "--single", "-s", GetoptLong::NO_ARGUMENT ]
)
opts.each do |opt, arg|
case opt
when "--verbose":
ENV["VERBOSE"] = "1"
when "--flush":
ENV["FLUSH"] = "1"
when "--server":
ENV["SERVER"] = arg
when "--single":
ENV["SINGLE"] = "1"
end
end
rescue StandardError => ex
puts "Option parsing failed: #{ex.to_s}"
exit
end
#
# Create the object
#
worker = Custodian.new( $SERVER )
#
# Are we flushing the queue?
#
if ( ENV['FLUSH'] )
worker.flush_queue!
exit(0)
end
#
# Single step?
#
if ( ENV['SINGLE'] )
worker.process_single_job
exit(0)
end
#
# Otherwise loop indefinitely
#
worker.run!
end
|
