Spring集成文件入站适配器扫描目录每个轮询

Question

<int-file:inbound-channel-adapter id="hostFilesOut" channel="hostFileOutChannel"
    directory="${hostfile.dir.out}" prevent-duplicates="false"
    filename-regex="${hostfile.out.filename-regex}" >
    <int:poller id="poller" cron="${poller.cron:0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * * }"
        max-messages-per-poll="1" />
</int-file:inbound-channel-adapter> 

有人能给出一个建议吗？或者有没有其他方法也能达到同样的目的。

谢谢你。

Answer 1

FileReadingMessageSource已经有这样一个选项：

/**
 * Optional. Set this flag if you want to make sure the internal queue is
 * refreshed with the latest content of the input directory on each poll.
 * <p>
 * By default this implementation will empty its queue before looking at the
 * directory again. In cases where order is relevant it is important to
 * consider the effects of setting this flag. The internal
 * {@link java.util.concurrent.BlockingQueue} that this class is keeping
 * will more likely be out of sync with the file system if this flag is set
 * to <code>false</code>, but it will change more often (causing expensive
 * reordering) if it is set to <code>true</code>.
 *
 * @param scanEachPoll
 *            whether or not the component should re-scan (as opposed to not
 *            rescanning until the entire backlog has been delivered)
 */
public void setScanEachPoll(boolean scanEachPoll) {

然而，我感到惊讶的是，我们没有为XML配置公开这个选项，尽管这个选项从https://jira.spring.io/browse/int-583开始就有了。

这是关于这件事的医生。