Added logger convenience methods to connection and database. Makes it possible to use the logger instance in the driver from the outside world.

lib/mongo/connection.rb

@@ -94,6 +94,10 @@ module Mongo
     def db(db_name, options={})
       DB.new(db_name, @pair, @options.merge(options))
     end
+    
+    def logger
+      @options[:logger]
+    end
 
     # Returns a hash containing database names as keys and disk space for
     # each as values.

lib/mongo/db.rb

@@ -58,6 +58,9 @@ module Mongo
 
     # The database's socket. For internal (and Cursor) use only.
     attr_reader :socket
+    
+    # The logger instance if :logger is passed to initialize
+    attr_reader :logger
 
     def slave_ok?; @slave_ok; end
     def auto_reconnect?; @auto_reconnect; end

test/test_connection.rb

@@ -66,6 +66,17 @@ class TestConnection < Test::Unit::TestCase
     assert output.string.include?("db.test.find")
     assert !output.string.include?("db.test.remove")
   end
+  
+  def test_connection_logger
+    output = StringIO.new
+    logger = Logger.new(output)
+    logger.level = Logger::DEBUG
+    connection = Connection.new(@host, @port, :logger => logger)
+    assert_equal logger, connection.logger
+    
+    connection.logger.debug 'testing'
+    assert output.string.include?('testing')
+  end
 
   def test_drop_database
     db = @mongo.db('ruby-mongo-will-be-deleted')

test/test_db.rb

@@ -2,6 +2,8 @@ $LOAD_PATH[0,0] = File.join(File.dirname(__FILE__), '..', 'lib')
 require 'digest/md5'
 require 'mongo'
 require 'test/unit'
+require 'stringio'
+require 'logger'
 
 class TestPKFactory
   def create_pk(row)
@@ -45,6 +47,17 @@ class DBTest < Test::Unit::TestCase
       @@users = @@db.collection('system.users')
     end
   end
+  
+  def test_logger
+    output = StringIO.new
+    logger = Logger.new(output)
+    logger.level = Logger::DEBUG
+    db = Connection.new(@host, @port, :logger => logger).db('ruby-mongo-test')
+    assert_equal logger, db.logger
+    
+    db.logger.debug 'testing'
+    assert output.string.include?('testing')
+  end
 
   def test_full_coll_name
     coll = @@db.collection('test')