mappedStatements = new HashMap();
cacheModels = new HashMap();
resultMaps = new HashMap();
parameterMaps = new HashMap();
requestPool = new ThrottledPool(RequestScope.class, DEFAULT_MAX_REQUESTS);
sessionPool = new ThrottledPool(SessionScope.class, DEFAULT_MAX_SESSIONS);
sqlExecutor = new SqlExecutor();
typeHandlerFactory = new TypeHandlerFactory();
dataExchangeFactory = new DataExchangeFactory(typeHandlerFactory);
}