remote_settings: delete the code for config dumping/loading

CHANGELOG.md

@@ -3,6 +3,9 @@ Airbrake Ruby Changelog
 
 ### master
 
+* Deleted support for dumping/loading the remote config
+  ([#621](https://github.com/airbrake/airbrake-ruby/pull/621))
+
 ### [v5.0.2][v5.0.2] (August 18, 2020)
 
 * Remote config: fixed bug where remote config can disappear from the queried

lib/airbrake-ruby/remote_settings.rb

@@ -8,22 +8,11 @@ module Airbrake
   #     config.error_notifications = data.error_notifications?
   #   end
   #
-  # When {#poll} is called, it will try to load remote settings from disk, so
-  # that it doesn't wait on the result from the API call.
-  #
-  # When {#stop_polling} is called, the current config will be dumped to disk.
-  #
   # @since 5.0.0
   # @api private
   class RemoteSettings
     include Airbrake::Loggable
 
-    # @return [String] the path to the persistent config
-    CONFIG_DUMP_PATH = File.join(
-      File.expand_path(__dir__),
-      '../../config/config.json',
-    ).freeze
-
     # @return [Hash{Symbol=>String}] metadata to be attached to every GET
     #   request
     QUERY_PARAMS = URI.encode_www_form(
@@ -54,18 +43,11 @@ def initialize(project_id, host, &block)
       @poll = nil
     end
 
-    # Polls remote config of the given project in background. Loads local config
-    # first (if exists).
+    # Polls remote config of the given project in background.
     #
     # @return [self]
     def poll
       @poll ||= Thread.new do
-        begin
-          load_config
-        rescue StandardError => ex
-          logger.error("#{LOG_LABEL} config loading failed: #{ex}")
-        end
-
         @block.call(@data)
 
         loop do
@@ -77,17 +59,11 @@ def poll
       self
     end
 
-    # Stops the background poller thread. Dumps current config to disk.
+    # Stops the background poller thread.
     #
     # @return [void]
     def stop_polling
       @poll.kill if @poll
-
-      begin
-        dump_config
-      rescue StandardError => ex
-        logger.error("#{LOG_LABEL} config dumping failed: #{ex}")
-      end
     end
 
     private
@@ -124,22 +100,5 @@ def build_config_uri
       uri.query = QUERY_PARAMS
       uri
     end
-
-    def load_config
-      config_dir = File.dirname(CONFIG_DUMP_PATH)
-      Dir.mkdir(config_dir) unless File.directory?(config_dir)
-
-      return unless File.exist?(CONFIG_DUMP_PATH)
-
-      config = File.read(CONFIG_DUMP_PATH)
-      @data.merge!(JSON.parse(config))
-    end
-
-    def dump_config
-      config_dir = File.dirname(CONFIG_DUMP_PATH)
-      Dir.mkdir(config_dir) unless File.directory?(config_dir)
-
-      File.write(CONFIG_DUMP_PATH, JSON.dump(@data.to_h))
-    end
   end
 end

spec/remote_settings_spec.rb

@@ -22,42 +22,19 @@
     }
   end
 
-  let(:config_path) { described_class::CONFIG_DUMP_PATH }
-  let(:config_dir) { File.dirname(config_path) }
-
   let!(:stub) do
     stub_request(:get, Regexp.new(endpoint))
       .to_return(status: 200, body: body.to_json)
   end
 
-  before do
-    # Do not create config dumps on disk.
-    allow(Dir).to receive(:mkdir).with(config_dir)
-    allow(File).to receive(:write).with(config_path, anything)
-  end
-
   describe ".poll" do
     describe "config loading" do
       let(:settings_data) { described_class::SettingsData.new(project_id, body) }
 
       before do
-        allow(File).to receive(:exist?).with(config_path).and_return(true)
-        allow(File).to receive(:read).with(config_path).and_return(body.to_json)
-
         allow(described_class::SettingsData).to receive(:new).and_return(settings_data)
       end
 
-      it "loads the config from disk" do
-        expect(File).to receive(:read).with(config_path)
-        expect(settings_data).to receive(:merge!).with(body).twice
-
-        remote_settings = described_class.poll(project_id, host) {}
-        sleep(0.2)
-        remote_settings.stop_polling
-
-        expect(stub).to have_been_requested.once
-      end
-
       it "yields the config to the block twice" do
         block = proc {}
         expect(block).to receive(:call).twice
@@ -68,21 +45,6 @@
 
         expect(stub).to have_been_requested.once
       end
-
-      context "when config loading fails" do
-        it "logs an error" do
-          expect(File).to receive(:read).and_raise(StandardError)
-          expect(Airbrake::Loggable.instance).to receive(:error).with(
-            '**Airbrake: config loading failed: StandardError',
-          )
-
-          remote_settings = described_class.poll(project_id, host) {}
-          sleep(0.2)
-          remote_settings.stop_polling
-
-          expect(stub).to have_been_requested.once
-        end
-      end
     end
 
     context "when no errors are raised" do
@@ -199,32 +161,4 @@
       end
     end
   end
-
-  describe "#stop_polling" do
-    it "dumps config data to disk" do
-      expect(Dir).to receive(:mkdir).with(config_dir)
-      expect(File).to receive(:write).with(config_path, body.to_json)
-
-      remote_settings = described_class.poll(project_id, host) {}
-      sleep(0.2)
-      remote_settings.stop_polling
-
-      expect(stub).to have_been_requested.once
-    end
-
-    context "when config dumping fails" do
-      it "logs an error" do
-        expect(File).to receive(:write).and_raise(StandardError)
-        expect(Airbrake::Loggable.instance).to receive(:error).with(
-          '**Airbrake: config dumping failed: StandardError',
-        )
-
-        remote_settings = described_class.poll(project_id, host) {}
-        sleep(0.2)
-        remote_settings.stop_polling
-
-        expect(stub).to have_been_requested.once
-      end
-    end
-  end
 end