DescribeDomain 搭配 AWS SDK 使用

    /**
     * Describes the specified domain asynchronously.
     *
     * @param domainName the name of the domain to describe
     * @return a {@link CompletableFuture} that completes with the ARN of the domain
     * @throws RuntimeException if the domain description fails
     */
    public CompletableFuture<String> describeDomainAsync(String domainName) {
        DescribeDomainRequest request = DescribeDomainRequest.builder()
            .domainName(domainName)
            .build();

        return getAsyncClient().describeDomain(request)
            .handle((response, exception) -> {  // Handle both response and exception
                if (exception != null) {
                    throw new RuntimeException("Failed to describe domain", exception);
                }
                DomainStatus domainStatus = response.domainStatus();
                String endpoint = domainStatus.endpoint();
                String arn = domainStatus.arn();
                String engineVersion = domainStatus.engineVersion();
                logger.info("Domain endpoint is: " + endpoint);
                logger.info("ARN: " + arn);
                System.out.println("Engine version: " + engineVersion);

                return arn;  // Return ARN when successful
            });
    }