JAVA-657: ReadPreference ignored for some commands due to case-sensitive comparison

Author: jyemin

src/main/com/mongodb/DB.java

@@ -43,13 +43,13 @@ public abstract class DB {
     static {
         _obedientCommands.add("group");
         _obedientCommands.add("aggregate");
-        _obedientCommands.add("collStats");
-        _obedientCommands.add("dbStats");
+        _obedientCommands.add("collstats");
+        _obedientCommands.add("dbstats");
         _obedientCommands.add("count");
         _obedientCommands.add("distinct");
-        _obedientCommands.add("geoNear");
-        _obedientCommands.add("geoSearch");
-        _obedientCommands.add("geoWalk");
+        _obedientCommands.add("geonear");
+        _obedientCommands.add("geosearch");
+        _obedientCommands.add("geowalk");
     }
 
     /**
@@ -88,7 +88,7 @@ ReadPreference getCommandReadPreference(DBObject command, ReadPreference request
             else
                 primaryRequired = true;
         } else {
-           primaryRequired =  !_obedientCommands.contains(comString);
+           primaryRequired =  !_obedientCommands.contains(comString.toLowerCase());
         }
 
         if (primaryRequired) {

src/test/com/mongodb/DBTest.java

@@ -119,6 +119,9 @@ public void testReadPreferenceObedience() {
 
         obj = new BasicDBObject("count", 1);
         assertEquals(ReadPreference.primary(), _db.getCommandReadPreference(obj, null));
+
+        obj = new BasicDBObject("collStats", 1);
+        assertEquals(ReadPreference.secondaryPreferred(), _db.getCommandReadPreference(obj, ReadPreference.secondaryPreferred()));
     }
 
     @Test(groups = {"basic"})