Class: Ec2::Lock

Inherits:

Object

• Object
• Ec2::Lock

Includes:

Logger

Defined in:

lib/ec2/lock.rb

Instance Method Summary

• #acquire ⇒ Object
• #lock_file ⇒ Object

Methods included from Logger

#debug?, #logger, logger, #stderr, stderr

Instance Method Details

#acquire ⇒ Object

# File 'lib/ec2/lock.rb', line 7

def acquire
  logger.debug "acquiring lock"
  lock_acquired = lock_file.flock(File::LOCK_NB | File::LOCK_EX)
  raise "exclusive lock not available" if not lock_acquired
end

#lock_file ⇒ Object

# File 'lib/ec2/lock.rb', line 13

def lock_file
  @lock_file ||= File.open(".ec2.lock", "a+")
end