support for non rails applications

.gitignore

@@ -2,6 +2,7 @@
 *.rbc
 .bundle
 .config
+.idea
 .yardoc
 .project
 *.log

lib/mongodb_logger/logger.rb

@@ -24,18 +24,22 @@ class Logger < RailsLogger
     attr_reader :db_configuration, :mongo_adapter
 
     def initialize(path = nil, level = DEBUG)
-      path ||= File.join(Rails.root, "log/#{Rails.env}.log")
-      @level = level
-      internal_initialize
-    rescue => e
-      # should use a config block for this
-      Rails.env.production? ? (raise e) : (puts "MongodbLogger WARNING: Using Rails Logger due to exception: #{e.message}")
-    ensure
-      if disable_file_logging?
-        @log            = ::Logger.new(STDOUT)
-        @log.level      = @level
-      else
-        super(path, @level)
+      set_root_and_env
+
+      begin
+        path ||= File.join(@app_root, "log/#{@app_env}.log")
+        @level = level
+        internal_initialize
+      rescue => e
+        # should use a config block for this
+        Rails.env.production? ? (raise e) : (puts "MongodbLogger WARNING: Using Rails Logger due to exception: #{e.message}")
+      ensure
+        if disable_file_logging?
+          @log            = ::Logger.new(STDOUT)
+          @log.level      = @level
+        else
+          super(path, @level)
+        end
       end
     end
 
@@ -114,7 +118,7 @@ def configure
         port: 27017,
         capsize: default_capsize,
         ssl: false}.merge(resolve_config).with_indifferent_access
-      @db_configuration[:collection] ||= defined?(Rails) ? "#{Rails.env}_log" : "production_log"
+      @db_configuration[:collection] ||= "#{@app_env}_log"
       @db_configuration[:application_name] ||= resolve_application_name
       @db_configuration[:write_options] ||= { w: 0, wtimeout: 200 }
 
@@ -130,9 +134,9 @@ def resolve_application_name
     def resolve_config
       config = {}
       CONFIGURATION_FILES.each do |filename|
-        config_file = Rails.root.join("config", filename)
-        if config_file.file?
-          config = YAML.load(ERB.new(config_file.read).result)[Rails.env.to_s]
+        config_file = File.join(@app_root, 'config', filename)
+        if File.file? config_file
+          config = YAML.load(ERB.new(File.new(config_file).read).result)[@app_env]
           config = config['mongodb_logger'] if config && config.has_key?('mongodb_logger')
           break unless config.blank?
         end
@@ -206,5 +210,17 @@ def nice_serialize_object(data)
       end
     end
 
+    def set_root_and_env
+      if defined? Rails
+        @app_root = Rails.root.to_s
+        @app_env  = Rails.env.to_s
+      elsif defined? RACK_ROOT
+        @app_root = RACK_ROOT
+        @app_env  = ENV['RACK_ENV'] || 'production'
+      else
+        raise 'Please define RACK_ROOT in the top of your config.ru like this: RACK_ROOT = File.dirname(__FILE__)'
+      end
+    end
+
   end
 end

lib/mongodb_logger/rack_middleware.rb

@@ -22,7 +22,15 @@ def call(env)
         ip:         request_ip(request)
       }
 
-      Rails.logger.mongoize(log_attrs) do
+      @logger ||= if defined?(Rails)
+                    Rails.logger
+                  elsif defined?(LOGGER)
+                    LOGGER
+                  else
+                    MongodbLogger::Logger.new
+                  end
+
+      @logger.mongoize(log_attrs) do
         return @app.call(env)
       end
     end