将可调用的as参数传递给方法，并将其返回值用作该方法的参数

Question

我编写了一个方法，它接收一个可调用的字符串和一个任意长度的字符串数组，我使用这些字符串来确定可调用的执行时间，然后将结果写入数据库：

public static <T> T logTimes(Callable<T> callable, String actionToTest, String... testData) throws Exception {
        LocalDateTime before = null;
        T call = null;
        try {
            before = LocalDateTime.now();
            call = callable.call();
            logToDocument(before, LocalDateTime.now(), actionToTest, testData);
        } catch (TimeoutException ex) {
            logToDocument(before, LocalDateTime.now(), actionToTest, testData);
        }
        return call;
    }

这很好，但是我现在遇到了一种情况，我需要将Callable的返回值作为参数传递给相同的方法：

public static String loadedPageName(WebDriver driver, int seconds) throws Exception {
        String originPage = pageName(driver);
        By loadingBar = By.xpath("//div[contains(@class, 'progress')]");
        WebDriverWait w = new WebDriverWait(driver, seconds);
        Function<WebDriver, Boolean> pageFinishedLoading = wd -> wd.findElements(loadingBar).size() == 0;
        AtomicReference<String> dest = new AtomicReference<>();
        try {
            return ExtentTestManager.logTimes(()-> {
                w.until(ExpectedConditions.presenceOfAllElementsLocatedBy(loadingBar));
                w.until(pageFinishedLoading);
                dest.set(driver.findElement(By.tagName("body")).getAttribute("page-name"));
                return dest;
            }, REDIRECT, ORIGIN, originPage, DESTINATION, dest.get()).get();
        } catch (TimeoutException ex) {
            ExtentTestManager.reporterLog("Timeout after waiting ".concat(String.valueOf(seconds)).concat(" seconds for a page to load"));
            ExtentTestManager.logToDocument(LocalDateTime.now(), seconds, REDIRECT, ORIGIN, originPage, DESTINATION, "timeout");
            return null;
        }
    }

此方法一直等待，直到加载页并返回加载页的名称。我希望在ExtentTestManager.logtimes(callable callable，String actionToTest，String...testData) 调用中使用该返回值作为参数，而callable callable 是其参数之一。

现在，loadedPagename（WebDriver driver,int seconds)按预期返回页名，但logtimes将null写入数据库，以获得callable的结果。

有没有办法做到这一点？

Answer 1

您在日志中的代码等效于：

    try {
        before = LocalDateTime.now();
        call = callable.call();
        
    } catch (TimeoutException ex) {
        // do nothing with the exception
    }
    logToDocument(before, LocalDateTime.now(), actionToTest, testData);

也许您想用TimeoutException做点什么？另外，loadedPageName中的调用代码将永远不会遇到TimeoutException，因为它已经在日志中被捕获（并被忽略）。

Edit：您声明“logtimes将null写入数据库，以获得可调用的结果。”我不明白，logTimes不是在任何地方写可调用的结果，而是只返回它。

AtomicReference<String> dest = new AtomicReference<>();
    try {
        return ExtentTestManager.logTimes(()-> {
            w.until(ExpectedConditions.presenceOfAllElementsLocatedBy(loadingBar));
            w.until(pageFinishedLoading);
            dest.set(driver.findElement(By.tagName("body")).getAttribute("page-name"));
            return dest.get();
        }, REDIRECT, ORIGIN, originPage, DESTINATION, dest.get());

public static <T> T logTimes(Callable<T> callable, String actionToTest, String... testData) throws Exception {
    LocalDateTime before = LocalDateTime.now();
    T call = callable.call();
    List<String> allTestData = new ArrayList<String>(Arrays.asList(testData));
    allTestData.add(String.valueOf(call));
    logToDocument(before, LocalDateTime.now(), actionToTest, allTestData.toArray(new String[0]));        
    return call;
}