class SidekiqUniqueJobs::Middleware::Client

@author Mikael Henriksson <mikael@zoolutions.se>
The unique sidekiq middleware for the client push

def call(*)

Other tags:
    Yield: - when the lock is successful
    Yield: - when uniqueness is disable

Other tags:
    See: https://github.com/mperham/sidekiq/wiki/Middleware -
    See: https://github.com/mperham/sidekiq/wiki/Job-Format -
    See: SidekiqUniqueJobs::Middleware#call - 
def call(*)
  lock { yield }
end

def lock 

def lock
  if (token = lock_instance.lock)
    yield token
  else
    warn_about_duplicate
  end
end

def warn_about_duplicate 

def warn_about_duplicate
  return unless log_duplicate?
  log_warn "Already locked with another job_id (#{dump_json(item)})"
end