code: private void processJWKRequest(HttpServletResponse response, JwtConfig jwtConfig) throws IOException {
  
  		/*
  		 * if (!jwtConfig.isJwkEnabled()) { String errorMsg =
  		 * Tr.formatMessage(tc, "JWK_ENDPOINT_JWK_NOT_ENABLED", new Object[] {
  		 * jwtConfig.getId() }); Tr.error(tc, errorMsg);
  		 * response.sendError(HttpServletResponse.SC_BAD_REQUEST, errorMsg);
  		 * return; }
  		 */
  
  		String signatureAlg = jwtConfig.getSignatureAlgorithm();
  		if (!Constants.SIGNATURE_ALG_RS256.equals(signatureAlg)) {
  			String errorMsg = Tr.formatMessage(tc, "JWK_ENDPOINT_WRONG_ALGORITHM",
  					new Object[] { jwtConfig.getId(), signatureAlg, Constants.SIGNATURE_ALG_RS256 });
  			Tr.error(tc, errorMsg);
  			response.sendError(HttpServletResponse.SC_BAD_REQUEST, errorMsg);
  			return;
  		}
  
  		String jwkString = jwtConfig.getJwkJsonString();
  
  		addNoCacheHeaders(response);
  		response.setStatus(200);
  
  		if (jwkString == null) {
  			return;
  		}
  		try {
  			PrintWriter pw = response.getWriter();
  			response.setHeader(WebConstants.HTTP_HEADER_CONTENT_TYPE, WebConstants.HTTP_CONTENT_TYPE_JSON);
  			pw.write(jwkString);
  			pw.flush();
  			pw.close();
  		} catch (IOException e) {
  			if (tc.isDebugEnabled()) {
  				Tr.debug(tc, "Caught an exception attempting to get the response writer: " + e.getLocalizedMessage());
  			}
  		}
  	}
docs: Obtains the JWK string that is active in the specified config and prints
  it in JSON format in the response. If a JWK is not found, the response
  will be empty.
  
  @param response
  @param jwtConfig
  @throws IOException