split grpc pool size inside of config

config/puma.rb

@@ -8,10 +8,9 @@
 
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers: a minimum and maximum.
-# Any libraries that use thread pools should be configured to match
-# the maximum value specified for Puma. Default is set to 5 threads for minimum
-# and maximum; this matches the default thread size of Active Record.
-thread_count = Sagittarius::Configuration.config[:rails][:threads]
+# Default is set to 5 threads for minimum and maximum; this matches the default
+# thread size of Active Record.
+thread_count = Sagittarius::Configuration.config[:rails][:web][:threads]
 threads thread_count, thread_count
 
 # Specifies that the worker count should equal the number of processors in production.

config/sagittarius.example.yml

@@ -1,5 +1,4 @@
 rails:
-  threads: 3
   log_level: info
   mailer:
     from: Code0 <testmail@code0.tech>
@@ -9,10 +8,12 @@ rails:
     username: testmail@code0.tech
     password: changeme
   web:
+    threads: 3
     port: 3000
     bind: # For example: tcp://0.0.0.0:3000
     force_ssl:
   grpc:
+    threads: 3
     host: '0.0.0.0:50051'
   db:
     host: localhost

lib/sagittarius/configuration.rb

@@ -20,13 +20,14 @@ def self.application_setting_overrides
     def self.defaults
       {
         rails: {
-          threads: 3,
           web: {
+            threads: 3,
             port: 3000,
             force_ssl: nil,
             bind: nil,
           },
           grpc: {
+            threads: 3,
             host: '0.0.0.0:50051',
           },
           log_level: 'info',

lib/sagittarius/grpc/launcher.rb

@@ -13,7 +13,7 @@ def create_server
           Sagittarius::Middleware::Grpc::Context.new,
           Sagittarius::Middleware::Grpc::Logger.new,
           Sagittarius::Middleware::Grpc::Authentication.new
-        ].reverse, pool_size: Configuration.config[:rails][:threads])
+        ].reverse, pool_size: Configuration.config[:rails][:grpc][:threads])
         logger.info('GRPC server created')
 
         @server.add_http2_port(HOST, :this_port_is_insecure)

spec/lib/sagittarius/configuration_spec.rb

@@ -7,7 +7,10 @@
     let(:yaml_config) do
       <<~CONFIG
         rails:
-          threads: 4
+          web:
+            threads: 4
+          grpc:
+            threads: 8
       CONFIG
     end
 
@@ -20,7 +23,12 @@
     end
 
     it 'loads the config' do
-      expect(described_class.config).to include(rails: a_hash_including(threads: 4))
+      expect(described_class.config).to include(
+        rails: a_hash_including(
+          web: a_hash_including(threads: 4),
+          grpc: a_hash_including(threads: 8)
+        )
+      )
     end
   end