Move EE specific code from Gitbab::Database to ee/

This commit move EE specific code from GitLab::Database
into ee/, and remove unused methods.

ee/lib/ee/gitlab/database.rb

@@ -3,6 +3,25 @@ module EE
     module Database
       extend ::Gitlab::Utils::Override
 
+      override :read_only?
+      def read_only?
+        ::Gitlab::Geo.secondary?
+      end
+
+      def healthy?
+        return true unless postgresql?
+
+        !Postgresql::ReplicationSlot.lag_too_great?
+      end
+
+      # Disables prepared statements for the current database connection.
+      def disable_prepared_statements
+        config = ActiveRecord::Base.configurations[Rails.env]
+        config['prepared_statements'] = false
+
+        ActiveRecord::Base.establish_connection(config)
+      end
+
       override :add_post_migrate_path_to_rails
       def add_post_migrate_path_to_rails(force: false)
         super

ee/spec/lib/ee/gitlab/database_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Database do
+  describe '.read_only?' do
+    context 'with Geo enabled' do
+      before do
+        allow(Gitlab::Geo).to receive(:enabled?) { true }
+        allow(Gitlab::Geo).to receive(:current_node) { geo_node }
+      end
+
+      context 'is Geo secondary node' do
+        let(:geo_node) { create(:geo_node) }
+
+        it 'returns true' do
+          expect(described_class.read_only?).to be_truthy
+        end
+      end
+
+      context 'is Geo primary node' do
+        let(:geo_node) { create(:geo_node, :primary) }
+
+        it 'returns false when is Geo primary node' do
+          expect(described_class.read_only?).to be_falsey
+        end
+      end
+    end
+
+    context 'with Geo disabled' do
+      it 'returns false' do
+        expect(described_class.read_only?).to be_falsey
+      end
+    end
+  end
+
+  describe '.healthy?' do
+    it 'returns true when using MySQL' do
+      allow(described_class).to receive(:postgresql?).and_return(false)
+
+      expect(described_class.healthy?).to be_truthy
+    end
+
+    context 'when using PostgreSQL' do
+      before do
+        allow(described_class).to receive(:postgresql?).and_return(true)
+      end
+
+      it 'returns true when replication lag is not too great' do
+        allow(Postgresql::ReplicationSlot).to receive(:lag_too_great?).and_return(false)
+
+        expect(described_class.healthy?).to be_truthy
+      end
+
+      it 'returns false when replication lag is too great' do
+        allow(Postgresql::ReplicationSlot).to receive(:lag_too_great?).and_return(true)
+
+        expect(described_class.healthy?).to be_falsey
+      end
+    end
+  end
+
+  describe '.disable_prepared_statements' do
+    it 'disables prepared statements' do
+      config = {}
+
+      expect(ActiveRecord::Base.configurations).to receive(:[])
+        .with(Rails.env)
+        .and_return(config)
+
+      expect(ActiveRecord::Base).to receive(:establish_connection)
+        .with({ 'prepared_statements' => false })
+
+      described_class.disable_prepared_statements
+
+      expect(config['prepared_statements']).to eq(false)
+    end
+  end
+end

ee/spec/workers/geo/prune_event_log_worker_spec.rb

@@ -27,7 +27,7 @@ describe Geo::PruneEventLogWorker, :geo do
       end
 
       it 'does nothing when database is not feeling healthy' do
-        allow(Gitlab::Database).to receive(:healthy?).and_return(false)
+        allow(EE::Gitlab::Database).to receive(:healthy?).and_return(false)
 
         expect(Geo::PruneEventLogService).not_to receive(:new)
 

lib/gitlab/database.rb

@@ -39,16 +39,15 @@ module Gitlab
       adapter_name.casecmp('postgresql').zero?
     end
 
-    # Overridden in EE
     def self.read_only?
-      Gitlab::Geo.secondary?
+      false
     end
 
     def self.read_write?
       !self.read_only?
     end
 
-    # check whether the underlying database is in read-only mode
+    # Check whether the underlying database is in read-only mode
     def self.db_read_only?
       if postgresql?
         pg_is_in_recovery =
@@ -103,12 +102,6 @@ module Gitlab
       Gitlab::Database.postgresql_9_or_less? ? 'pg_last_xlog_replay_location' : 'pg_last_wal_replay_lsn'
     end
 
-    def self.healthy?
-      return true unless postgresql?
-
-      !Postgresql::ReplicationSlot.lag_too_great?
-    end
-
     def self.nulls_last_order(field, direction = 'ASC')
       order = "#{field} #{direction}"
 
@@ -141,10 +134,6 @@ module Gitlab
       postgresql? ? "RANDOM()" : "RAND()"
     end
 
-    def self.minute_interval(value)
-      postgresql? ? "#{value} * '1 minute'::interval" : "INTERVAL #{value} MINUTE"
-    end
-
     def self.true_value
       if postgresql?
         "'t'"
@@ -238,14 +227,6 @@ module Gitlab
       ActiveRecord::ConnectionAdapters::ConnectionPool.new(spec)
     end
 
-    # Disables prepared statements for the current database connection.
-    def self.disable_prepared_statements
-      config = ActiveRecord::Base.configurations[Rails.env]
-      config['prepared_statements'] = false
-
-      ActiveRecord::Base.establish_connection(config)
-    end
-
     def self.connection
       ActiveRecord::Base.connection
     end

spec/lib/gitlab/database_spec.rb

@@ -443,51 +443,9 @@ describe Gitlab::Database do
     end
   end
 
-  describe '#disable_prepared_statements' do
-    it 'disables prepared statements' do
-      config = {}
-
-      expect(ActiveRecord::Base.configurations).to receive(:[])
-        .with(Rails.env)
-        .and_return(config)
-
-      expect(ActiveRecord::Base).to receive(:establish_connection)
-        .with({ 'prepared_statements' => false })
-
-      described_class.disable_prepared_statements
-
-      expect(config['prepared_statements']).to eq(false)
-    end
-  end
-
   describe '.read_only?' do
-    context 'with Geo enabled' do
-      before do
-        allow(Gitlab::Geo).to receive(:enabled?) { true }
-        allow(Gitlab::Geo).to receive(:current_node) { geo_node }
-      end
-
-      context 'is Geo secondary node' do
-        let(:geo_node) { create(:geo_node) }
-
-        it 'returns true' do
-          expect(described_class.read_only?).to be_truthy
-        end
-      end
-
-      context 'is Geo primary node' do
-        let(:geo_node) { create(:geo_node, :primary) }
-
-        it 'returns false when is Geo primary node' do
-          expect(described_class.read_only?).to be_falsey
-        end
-      end
-    end
-
-    context 'with Geo disabled' do
-      it 'returns false' do
-        expect(described_class.read_only?).to be_falsey
-      end
+    it 'returns false' do
+      expect(described_class.read_only?).to be_falsey
     end
   end