private RuntimeException addExceptionContext()

in core/src/main/java/com/google/cloud/sql/core/DefaultConnectionInfoRepository.java [512:545]

• 27 lines of code
• 5 McCabe index (conditional complexity)

  private RuntimeException addExceptionContext(
      Exception ex, String fallbackDesc, CloudSqlInstanceName instanceName) {
    String reason = fallbackDesc;
    int statusCode = 0;

    // Verify we are able to extract a reason from an exception and the status code, or fallback to
    // a generic desc
    if (ex instanceof GoogleJsonResponseException) {
      GoogleJsonResponseException gjrEx = (GoogleJsonResponseException) ex;
      reason = gjrEx.getMessage();
      statusCode = gjrEx.getStatusCode();
    } else if (ex instanceof UnknownHostException) {
      statusCode = 404;
      reason = String.format("Host \"%s\" not found", ex.getMessage());
    } else {
      Matcher matcher = Pattern.compile("Error code (\\d+)").matcher(ex.getMessage());
      reason = ex.getMessage();
      if (matcher.find()) {
        statusCode = Integer.parseInt(matcher.group(1));
      }
    }

    // Check for commonly occurring user errors and add additional context
    String message =
        String.format(
            "[%s] The Google Cloud SQL Admin API failed for the project \"%s\". Reason: %s",
            instanceName.getConnectionName(), instanceName.getProjectId(), reason);

    if (TERMINAL_STATUS_CODES.contains(statusCode)) {
      return new TerminalException(message, ex);
    }
    // Fallback to the generic description
    return new RuntimeException(message, ex);
  }