Simplify contructor for size limiter validator

These are unused now that we read from application settings all the
time. The application settings are also validated already so we remove
the validations in this class.

lib/gitlab/sidekiq_middleware/size_limiter/validator.rb

@@ -49,18 +49,15 @@ module Gitlab
 
         attr_reader :mode, :size_limit, :compression_threshold
 
-        def initialize(
-          worker_class, job,
-          mode: Gitlab::CurrentSettings.sidekiq_job_limiter_mode,
-          compression_threshold: Gitlab::CurrentSettings.sidekiq_job_limiter_compression_threshold_bytes,
-          size_limit: Gitlab::CurrentSettings.sidekiq_job_limiter_limit_bytes
-        )
+        def initialize(worker_class, job)
           @worker_class = worker_class
           @job = job
 
-          set_mode(mode)
-          set_compression_threshold(compression_threshold)
-          set_size_limit(size_limit)
+          current_settings = Gitlab::CurrentSettings.current_application_settings
+
+          @mode = current_settings.sidekiq_job_limiter_mode
+          @compression_threshold = current_settings.sidekiq_job_limiter_compression_threshold_bytes
+          @size_limit = current_settings.sidekiq_job_limiter_limit_bytes
         end
 
         def validate!
@@ -80,30 +77,6 @@ module Gitlab
 
         private
 
-        def set_mode(mode)
-          @mode = (mode || TRACK_MODE).to_s.strip
-          unless MODES.include?(@mode)
-            ::Sidekiq.logger.warn "Invalid Sidekiq size limiter mode: #{@mode}. Fallback to #{TRACK_MODE} mode."
-            @mode = TRACK_MODE
-          end
-        end
-
-        def set_compression_threshold(compression_threshold)
-          @compression_threshold = (compression_threshold || DEFAULT_COMPRESSION_THRESHOLD_BYTES).to_i
-          if @compression_threshold <= 0
-            ::Sidekiq.logger.warn "Invalid Sidekiq size limiter compression threshold: #{@compression_threshold}"
-            @compression_threshold = DEFAULT_COMPRESSION_THRESHOLD_BYTES
-          end
-        end
-
-        def set_size_limit(size_limit)
-          @size_limit = (size_limit || DEFAULT_SIZE_LIMIT).to_i
-          if @size_limit < 0
-            ::Sidekiq.logger.warn "Invalid Sidekiq size limiter limit: #{@size_limit}"
-            @size_limit = DEFAULT_SIZE_LIMIT
-          end
-        end
-
         def exceed_limit_error(job_args)
           ExceedLimitError.new(@worker_class, job_args.bytesize, @size_limit).tap do |exception|
             # This should belong to Gitlab::ErrorTracking. We'll remove this

spec/lib/gitlab/sidekiq_middleware/size_limiter/validator_spec.rb

@@ -59,111 +59,6 @@ RSpec.describe Gitlab::SidekiqMiddleware::SizeLimiter::Validator, :aggregate_fai
         expect(validator.size_limit).to eq(2)
       end
     end
-
-    context 'when the input mode is valid' do
-      it 'does not log a warning message' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        described_class.new(TestSizeLimiterWorker, job_payload, mode: 'track')
-        described_class.new(TestSizeLimiterWorker, job_payload, mode: 'compress')
-      end
-    end
-
-    context 'when the input mode is invalid' do
-      it 'defaults to track mode and logs a warning message' do
-        expect(::Sidekiq.logger).to receive(:warn).with('Invalid Sidekiq size limiter mode: invalid. Fallback to track mode.')
-
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, mode: 'invalid')
-
-        expect(validator.mode).to eql('track')
-      end
-    end
-
-    context 'when the input mode is empty' do
-      it 'defaults to track mode' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, mode: nil)
-
-        expect(validator.mode).to eql('track')
-      end
-    end
-
-    context 'when the size input is valid' do
-      it 'does not log a warning message' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        described_class.new(TestSizeLimiterWorker, job_payload, size_limit: 300)
-        described_class.new(TestSizeLimiterWorker, job_payload, size_limit: 0)
-      end
-    end
-
-    context 'when the size input is invalid' do
-      it 'logs a warning message' do
-        expect(::Sidekiq.logger).to receive(:warn).with('Invalid Sidekiq size limiter limit: -1')
-
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, size_limit: -1)
-
-        expect(validator.size_limit).to be(0)
-      end
-    end
-
-    context 'when the size input is empty' do
-      it 'defaults to 0' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, size_limit: nil)
-
-        expect(validator.size_limit).to be(described_class::DEFAULT_SIZE_LIMIT)
-      end
-    end
-
-    context 'when the compression threshold is valid' do
-      it 'does not log a warning message' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: 300)
-        described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: 1)
-      end
-    end
-
-    context 'when the compression threshold is negative' do
-      it 'logs a warning message' do
-        expect(::Sidekiq.logger).to receive(:warn).with('Invalid Sidekiq size limiter compression threshold: -1')
-
-        described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: -1)
-      end
-
-      it 'falls back to the default' do
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: -1)
-
-        expect(validator.compression_threshold).to be(100_000)
-      end
-    end
-
-    context 'when the compression threshold is zero' do
-      it 'logs a warning message' do
-        expect(::Sidekiq.logger).to receive(:warn).with('Invalid Sidekiq size limiter compression threshold: 0')
-
-        described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: 0)
-      end
-
-      it 'falls back to the default' do
-        validator = described_class.new(TestSizeLimiterWorker, job_payload, compression_threshold: 0)
-
-        expect(validator.compression_threshold).to be(100_000)
-      end
-    end
-
-    context 'when the compression threshold is empty' do
-      it 'defaults to 100_000' do
-        expect(::Sidekiq.logger).not_to receive(:warn)
-
-        validator = described_class.new(TestSizeLimiterWorker, job_payload)
-
-        expect(validator.compression_threshold).to be(100_000)
-      end
-    end
   end
 
   shared_examples 'validate limit job payload size' do
@@ -171,20 +66,6 @@ RSpec.describe Gitlab::SidekiqMiddleware::SizeLimiter::Validator, :aggregate_fai
       let(:compression_threshold) { nil }
       let(:mode) { 'track' }
 
-      context 'when size limit negative' do
-        let(:size_limit) { -1 }
-
-        it 'does not track jobs' do
-          expect(Gitlab::ErrorTracking).not_to receive(:track_exception)
-
-          validate.call(TestSizeLimiterWorker, job_payload(a: 'a' * 300))
-        end
-
-        it 'does not raise exception' do
-          expect { validate.call(TestSizeLimiterWorker, job_payload(a: 'a' * 300)) }.not_to raise_error
-        end
-      end
-
       context 'when size limit is 0' do
         let(:size_limit) { 0 }
 
@@ -366,9 +247,8 @@ RSpec.describe Gitlab::SidekiqMiddleware::SizeLimiter::Validator, :aggregate_fai
   end
 
   describe '#validate!' do
-    context 'when creating an instance with the related configuration variables' do
     let(:validate) do
-        ->(worker_clas, job) do
+      ->(worker_class, job) do
         described_class.new(worker_class, job).validate!
       end
     end
@@ -383,19 +263,4 @@ RSpec.describe Gitlab::SidekiqMiddleware::SizeLimiter::Validator, :aggregate_fai
 
     it_behaves_like 'validate limit job payload size'
   end
-
-    context 'when creating an instance with mode and size limit' do
-      let(:validate) do
-        ->(worker_clas, job) do
-          validator = described_class.new(
-            worker_class, job,
-            mode: mode, size_limit: size_limit, compression_threshold: compression_threshold
-          )
-          validator.validate!
-        end
-      end
-
-      it_behaves_like 'validate limit job payload size'
-    end
-  end
 end