Module: ThreeScale::Backend::Manifest

Defined in:
lib/3scale/backend/manifest.rb

Class Method Summary collapse

Class Method Details

.compute_workers(ncpus) ⇒ Object

Compute workers based on LISTENER_WORKERS and PUMA_WORKERS env variables. The former takes precedence. If those envs do not exist or are empty, use number of cpus



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# File 'lib/3scale/backend/manifest.rb', line 24

def compute_workers(ncpus)
  return 0 unless Process.respond_to?(:fork)

  compute_workers_from_env(LISTENER_WORKERS) ||
    compute_workers_from_env(PUMA_WORKERS) ||
    ncpus * PUMA_WORKERS_CPUMULT
end

.report ⇒ Object 



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# File 'lib/3scale/backend/manifest.rb', line 56

def report
  {
    version: ThreeScale::Backend::VERSION,
    root_dir: ThreeScale::Backend::Util.root_dir,
    servers: ThreeScale::Backend::Server.list,
    thread_safe: thread_safe?,
    server_model: server_model,
  }
end

.server_model ⇒ Object 



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# File 'lib/3scale/backend/manifest.rb', line 32

def server_model
  # Serving model settings here
  #
  # compute default workers and threads values
  # We want to adapt workers and threads to our characteristics.
  # Note that these values will likely need to be tweaked depending on
  # the Ruby implementation and how our app behaves!
  ncpus = ThreeScale::Backend::Util.number_of_cpus
  workers = compute_workers ncpus
  # if no workers but mt-safe, we spawn more threads.
  min_threads, max_threads = if thread_safe?
                               shift = workers.zero? ? 2 : 0
                               [ncpus << shift, ncpus << 1 + shift]
                             else
                               [1, 1]
                             end
  {
    ncpus: ncpus,
    workers: workers,
    min_threads: min_threads,
    max_threads: max_threads
  }
end

.thread_safe? ⇒ Boolean

Thread safety of our application. Turn this on if we ever are MT safe.

Returns:

  • (Boolean) 


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# File 'lib/3scale/backend/manifest.rb', line 17

def thread_safe?
  false
end