1. A computer-based method for controlling fine-grained security access to managed resources in a stateless web server architecture comprising: extracting a request pattern including at least a password value from a valid relative path portion of a validly-formatted Uniform Resource Locator request; mapping by a computer the extracted pattern to one or more application program components; responsive to the mapping, performing by a computer fine-grained instance level security access to the application program component according to an assigned security constraint, wherein at least one security constraint comprises the extracted password associated with the role name, and wherein different security constraints are assigned to different unique resource locator patterns in each deployment descriptor of a stateless web server architecture; and responsive to successful security access, sending by a computer to a requester a Uniform Resource Locator request to the mapped application program component; thereby providing different security access conditions to different instances of a same managed resource, and providing password authentication according to the pattern extracted from the relative path portion of the Uniform Resource Locator request.