Module: MongoOplogBackup::Lockable

Included in:
Backup, Rotate
Defined in:
lib/mongo_oplog_backup/lock.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/mongo_oplog_backup/lock.rb', line 6

def self.included(base)
  base.extend(self)
end

Instance Method Details

#lock(lockname, &block) ⇒ Object 



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# File 'lib/mongo_oplog_backup/lock.rb', line 10

def lock(lockname, &block)
  File.open(lockname, File::RDWR|File::CREAT, 0644) do |file|
    # Get a non-blocking lock
    got_lock = file.flock(File::LOCK_EX|File::LOCK_NB)
    if got_lock == false
      raise LockError, "Failed to acquire lock - another backup may be busy"
    end
    yield
  end
end