module MongoOplogBackup::Lockable

Public Class Methods

included(base) click to toggle source
# File lib/mongo_oplog_backup/lock.rb, line 6
def self.included(base)
  base.extend(self)
end

Public Instance Methods

lock(lockname) { || ... } click to toggle source
# 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