Support rails dbconsole (#8)

* Support `rails dbconsole`

* Bump to 0..11.0

* Rubocop

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    janus-ar (0.7.0)
+    janus-ar (0.11.0)
 
 GEM
   remote: http://rubygems.org/

lib/active_record/connection_adapters/janus_mysql2_adapter.rb

@@ -12,6 +12,14 @@ def janus_mysql2_connection(config)
   end
 end
 
+module ActiveRecord
+  class Base
+    def self.janus_mysql2_adapter_class
+      ActiveRecord::ConnectionAdapters::JanusMysql2Adapter
+    end
+  end
+end
+
 module ActiveRecord
   module ConnectionAdapters
     class JanusMysql2Adapter < ActiveRecord::ConnectionAdapters::Mysql2Adapter
@@ -28,6 +36,14 @@ class JanusMysql2Adapter < ActiveRecord::ConnectionAdapters::Mysql2Adapter
 
       attr_reader :config
 
+      class << self
+        def dbconsole(config, options = {})
+          connection_config = Janus::DbConsoleConfig.new(config)
+
+          super(connection_config, options)
+        end
+      end
+
       def initialize(*args)
         args[0][:janus]['replica']['database'] = args[0][:database]
         args[0][:janus]['primary']['database'] = args[0][:database]

lib/janus.rb

@@ -5,6 +5,7 @@
 module Janus
   autoload :Context, 'janus/context'
   autoload :VERSION, 'janus/version'
+  autoload :DbConsoleConfig, 'janus/db_console_config'
 
   module Logging
     autoload :Subscriber, 'janus/logging/subscriber'

lib/janus/db_console_config.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Janus
+  class DbConsoleConfig
+    def initialize(config)
+      @_config = config.configuration_hash
+    end
+
+    def configuration_hash
+      @_config[:janus]['replica'].symbolize_keys
+    end
+
+    def database
+      @_config[:database]
+    end
+  end
+end

lib/janus/version.rb

@@ -4,7 +4,7 @@ module Janus
   unless defined?(::Janus::VERSION)
     module VERSION
       MAJOR = 0
-      MINOR = 10
+      MINOR = 11
       PATCH = 0
       PRE = nil