public String scalerUrl()

in src/main/java/com/google/cloud/run/kafkascaler/ConfigurationProvider.java [274:294]

• 14 lines of code
• 3 McCabe index (conditional complexity)

  public String scalerUrl(String projectNumberRegion) throws IOException {
    Matcher projectNumberRegionMatcher = PROJECT_NUMBER_REGION_PATTERN.matcher(projectNumberRegion);

    if (!projectNumberRegionMatcher.matches()) {
      // This should only ever happen if Cloud Run metadata server is returning data in a new,
      // unexpected format.
      throw new IllegalArgumentException(
          "Failed to parse project number and region from: " + projectNumberRegion);
    }

    if (isNullOrEmpty(envProvider.getEnv("K_SERVICE"))) {
      // This is set by Cloud Run so this should never actually be null or empty.
      throw new IllegalStateException("K_SERVICE is null or empty.");
    }

    String projectNumber = projectNumberRegionMatcher.group(1);
    String region = projectNumberRegionMatcher.group(2);
    String serviceName = envProvider.getEnv("K_SERVICE");

    return String.format("https://%s-%s.%s.run.app", serviceName, projectNumber, region);
  }