code: @Override
  	public String getCacheKeyForJwtSSOToken(Subject subject, String encodedjwt) {
  		// TODO Auto-generated method stub
  		if (encodedjwt != null) {
  			return HashUtils.digest(encodedjwt);
  		} else if (subject != null) {
  			String jwtssotoken = getJwtSSOToken(subject);
  			if (jwtssotoken != null) {
  				return HashUtils.digest(jwtssotoken);
  			}
  		}
  
  		return null;
  	}
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.security.jwt.sso.token.utils.JwtSSOToken#
  getCacheKeyForJwtSSOToken(javax.security.auth.Subject, java.lang.String)