public String extract()

in phoenix-queryserver/src/main/java/org/apache/phoenix/queryserver/server/QueryServer.java [551:574]

• 20 lines of code
• 4 McCabe index (conditional complexity)

    public String extract(HttpServletRequest request) throws RemoteUserExtractionException {
      if (request.getParameter(userExtractParam) != null) {
        String extractedUser = paramRemoteUserExtractor.extract(request);
        UserGroupInformation ugi =
                UserGroupInformation
                        .createRemoteUser(stripHostNameFromPrincipal(request.getRemoteUser()));
        UserGroupInformation proxyUser = UserGroupInformation.createProxyUser(extractedUser, ugi);

        // Check if this user is allowed to be impersonated.
        // Will throw AuthorizationException if the impersonation as this user is not allowed
        try {
          ProxyUsers.authorize(proxyUser, request.getRemoteAddr());
          return extractedUser;
        } catch (AuthorizationException e) {
          throw new RemoteUserExtractionException(e.getMessage(), e);
        }
      } else {
        if (LOG.isDebugEnabled()) {
          LOG.debug("The parameter (" + userExtractParam + ") used to extract the remote user doesn't exist in the request.");
        }
        return requestRemoteUserExtractor.extract(request);
      }

    }