我一直致力于以下项目,一些背景知识:
我是一名实习生,正在为我的组织开发一个新的搜索系统。当前的设置是microsoft sharepoint 2013,其中用户上传文件等。另一方面是我正在开发的系统,它将所有数据上传到apache SOLR。
我已成功将sharepoint内容存储库映射到网络驱动器,我可以手动启动我的程序,开始使用Solrj api将此网络驱动器的内容索引到SOLR。
然而,我面临的问题是我无法从此网络驱动器轮询事件。在我运行本地的测试版本中,我使用了一个观察者服务来启动文件创建,文件修改和文件删除的代码(reindex文档,删除索引)。
这对于指向网络驱动器的网址不合适:(。
所以最大的问题是:是否有可用于从网络驱动器轮询事件的API /库?
任何帮助都会受到极大的赞赏!
答案 0 :(得分:2)
所以我最终想出了这个,尝试查看.net的观察者服务变体(system.io.filesystemwatcher),我遇到了同样的问题。我终于通过使用java.io.FileAlterationMonitor / observer来实现它。
代码:
public class UNCWatcher {
// A hardcoded path to a folder you are monitoring .
public static final String FOLDER =
"A:\\Department";
public static void main(String[] args) throws Exception {
// The monitor will perform polling on the folder every 5 seconds
final long pollingInterval = 5 * 1000;
File folder = new File(FOLDER);
if (!folder.exists()) {
// Test to see if monitored folder exists
throw new RuntimeException("Directory not found: " + FOLDER);
}
FileAlterationObserver observer = new FileAlterationObserver(folder);
FileAlterationMonitor monitor =
new FileAlterationMonitor(pollingInterval);
FileAlterationListener listener = new FileAlterationListenerAdaptor() {
// Is triggered when a file is created in the monitored folder
@Override
public void onFileCreate(File file) {
try {
// "file" is the reference to the newly created file
System.out.println("File created: "
+ file.getCanonicalPath());
if(file.getName().endsWith(".docx")){
System.out.println("Uploaded resource is of type docx, preparing solr for indexing.");
}
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
// Is triggered when a file is deleted from the monitored folder
@Override
public void onFileDelete(File file) {
try {
// "file" is the reference to the removed file
System.out.println("File removed: "
+ file.getCanonicalPath());
// "file" does not exists anymore in the location
System.out.println("File still exists in location: "
+ file.exists());
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
};
observer.addListener(listener);
monitor.addObserver(observer);
System.out.println("Starting monitor service");
monitor.start();
}
}