How to subscribe to RSS feed? about rssreader HOT 1 CLOSED

It is not possible to subscribe to a feed. However it can be implemented by wrapping RssReader in a TimeTask or using ScheduledExecutorService.

Generally it feels like a bad idea to just pass streams around since obviously they do need to be closed.

The underlying resources is automatically closed when reading to the end of the stream. If using methods like Stream::findFirst, Stream::findAny, Stream::limit or any other method that only reads the beginning of the stream then use the try-with-resources statement to close the stream.

        var rssReader = new RssReader();

        try (var feed = rssReader.read(URL)) {
            feed.limit(5)
                .map(this::toNews)
                .forEach(this::publishFiveLatestNews);
        }

It's not any different than just giving us a List and us calling List#stream

Returning a List<Item> would require the entire feed to be parsed and all items to be kept in memory.
RssReader uses a streaming XML parser that parse Items one by one and keeping one Item in memory at a time per feed.

from rssreader.