在vertx中编写计划程序以删除文件

Question

我想写一个可以返回Future而不是void start的方法

另外，我想在删除文件时应用锁。

public static void start（Vertx Vertx）引发异常{Vertx.settimer（timeInterval,id->{File File=新文件（config.getStringProperty（“File.upload.directory”,null）.get（））；

        if (file.isDirectory()) {
            File[] files = file.listFiles();
            for (File fileName : files) {
                long diff = new Date().getTime() - fileName.lastModified();
        if (diff > config.getLongProperty("file.upload.cleanup.timer.millisecond", 0).get()) {
                    deleteFileUploads(fileName.getAbsolutePath());
                }
            }
        }
    });
}

private static void deleteFileUploads(String fileName) {
    File file = new File(fileName);
    LOGGER.debug("Name of the file to be deleted"+fileName);
    file.delete();
}

}

相反，我希望我的函数像公共静态未来启动（Vertx Vertx）抛出异常{}

Answer 1

所以只需将void改为您想返回的内容？问题出在哪里？

public static Future start(Vertx vertx) throws Exception { vertx.setTimer(timeInterval, id -> { File file = new File(config.getStringProperty("file.upload.directory", null).get());

        if (file.isDirectory()) {
            File[] files = file.listFiles();
            for (File fileName : files) {
                long diff = new Date().getTime() - fileName.lastModified();
        if (diff > config.getLongProperty("file.upload.cleanup.timer.millisecond", 0).get()) {
                    deleteFileUploads(fileName.getAbsolutePath());
                }
            }
        }

    });
    //add new line to do your return here. If you want to get something out of the info above then use a public variable?
    return new Future()......;//define and return what you want here?
}

至于文件锁定，请尝试搜索其他问题。例如，参见这里：Java的file.delete是否执行文件锁定？这里是：锁定执行文件：Windows有，Linux没有。为什么？