ListUsageTotals 搭配 AWS SDK 使用

以下程式碼範例顯示如何使用 ListUsageTotals。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：

• 了解基本概念

Java

SDK for Java 2.x

注意

GitHub 上提供更多範例。尋找完整範例，並了解如何在 AWS 程式碼範例儲存庫中設定和執行。

    /**
     * Asynchronously lists Inspector2 usage totals using a paginator.
     *
     * @param accountIds optional list of account IDs
     * @param maxResults maximum results per page
     * @return CompletableFuture completed with formatted summary text
     */
    public CompletableFuture<String> listUsageTotalsAsync(
            List<String> accountIds,
            int maxResults) {

        logger.info("Starting usage totals paginator…");

        ListUsageTotalsRequest.Builder builder = ListUsageTotalsRequest.builder()
                .maxResults(maxResults);

        if (accountIds != null && !accountIds.isEmpty()) {
            builder.accountIds(accountIds);
        }

        ListUsageTotalsRequest request = builder.build();
        ListUsageTotalsPublisher paginator = getAsyncClient().listUsageTotalsPaginator(request);
        StringBuilder summaryBuilder = new StringBuilder();

        return paginator.subscribe(response -> {
                    if (response.totals() != null && !response.totals().isEmpty()) {
                        response.totals().forEach(total -> {
                            if (total.usage() != null) {
                                total.usage().forEach(usage -> {
                                    logger.info("Usage: {} = {}", usage.typeAsString(), usage.total());
                                    summaryBuilder.append(usage.typeAsString())
                                            .append(": ")
                                            .append(usage.total())
                                            .append("\n");
                                });
                            }
                        });
                    } else {
                        logger.info("Page contained no usage totals.");
                    }
                }).thenRun(() -> logger.info("Successfully listed usage totals."))
                .thenApply(v -> {
                    String summary = summaryBuilder.toString();
                    return summary.isEmpty() ? "No usage totals found." : summary;
                }).exceptionally(ex -> {
                    Throwable cause = ex.getCause() != null ? ex.getCause() : ex;

                    if (cause instanceof ValidationException ve) {
                        throw new CompletionException(
                                "Validation error listing usage totals: %s".formatted(ve.getMessage()),
                                ve
                        );
                    }

                    throw new CompletionException("Failed to list usage totals", cause);
                });
    }

• 如需 API 詳細資訊，請參閱AWS SDK for Java 2.x 《 API 參考》中的 ListUsageTotals。